gateway/modules/serviceCenter/services/serviceGeneration/renderers/rendererPptx.py

# Copyright (c) 2025 Patrick Motsch
# All rights reserved.
import logging
import base64
import io
import json
import re
from datetime import datetime, UTC
from typing import Dict, Any, Optional, List
from .documentRendererBaseTemplate import BaseRenderer
from modules.datamodels.datamodelDocument import RenderedDocument

logger = logging.getLogger(__name__)


_PPTX_MD_INLINE_RE = re.compile(
    r"(\*\*(.+?)\*\*)"
    r"|(__(.+?)__)"
    r"|(?<!\*)\*([^*\n]+?)\*(?!\*)"
    r"|(?<![\w/])_([^_\n]+?)_(?![\w/])"
    r"|`([^`]+)`"
)


class RendererPptx(BaseRenderer):
    """Renderer for PowerPoint (.pptx) files using python-pptx library."""
    
    def __init__(self, services=None):
        super().__init__(services=services)
        self.supportedFormats = ["pptx", "ppt"]
        self.outputMimeType = "application/vnd.openxmlformats-officedocument.presentationml.presentation"
    
    @classmethod
    def getSupportedFormats(cls) -> list:
        """Get list of supported output formats."""
        return ["pptx", "ppt"]
    
    @classmethod
    def getFormatAliases(cls) -> List[str]:
        """Return format aliases."""
        return []
    
    @classmethod
    def getPriority(cls) -> int:
        """Return priority for PowerPoint renderer."""
        return 105
    
    @classmethod
    def getOutputStyle(cls, formatName: Optional[str] = None) -> str:
        """Return output style classification: PowerPoint presentations are formatted documents."""
        return 'document'
    
    @classmethod
    def getAcceptedSectionTypes(cls, formatName: Optional[str] = None) -> List[str]:
        """
        Return list of section content types that PowerPoint renderer accepts.
        PowerPoint renderer accepts all section types (presentations can contain all content types including images).
        """
        from modules.datamodels.datamodelJson import supportedSectionTypes
        return list(supportedSectionTypes)
    
    async def render(self, extractedContent: Dict[str, Any], title: str, userPrompt: str = None, aiService=None, *, style: Dict[str, Any] = None) -> List[RenderedDocument]:
        """
        Render content as PowerPoint presentation from JSON data.
        
        Args:
            extractedContent: JSON content to render as presentation
            title: Title for the presentation
            userPrompt: User prompt for AI styling
            aiService: AI service for styling
            style: Unified style dict from pipeline (preferred over AI-generated styles)
        
        Returns:
            Base64-encoded PowerPoint presentation as string
        """
        try:
            # Import python-pptx
            from pptx import Presentation
            from pptx.util import Inches, Pt
            from pptx.enum.text import PP_ALIGN
            from pptx.dml.color import RGBColor
            import re
            
            # Get style set: prefer unified style, then metadata, then AI-enhanced
            if style:
                internalStyle = self._convertUnifiedStyleToInternal(style)
                defaultPptx = self._getDefaultStyleSet()
                for key in ("slide_size", "content_per_slide", "design_theme", "color_scheme", "background_style", "accent_colors", "professional_grade", "executive_ready"):
                    internalStyle[key] = defaultPptx.get(key)
                internalStyle["heading"] = internalStyle["heading1"]
                internalStyle["subheading"] = internalStyle["heading2"]
                styles = internalStyle
                self._unifiedStyle = style
            else:
                styles = await self._getStyleSet(extractedContent, userPrompt, aiService)
                self._unifiedStyle = None
            
            # Create new presentation
            prs = Presentation()
            
            # Set slide size based on user intent (default to 16:9)
            slide_size = styles.get("slide_size", "16:9")
            if slide_size == "4:3":
                prs.slide_width = Inches(10)
                prs.slide_height = Inches(7.5)
            else:  # Default to 16:9
                prs.slide_width = Inches(13.33)
                prs.slide_height = Inches(7.5)
            
            # Generate slides from JSON content
            slidesData = await self._parseJsonToSlides(extractedContent, title, styles)
            logger.info(f"Parsed {len(slidesData)} slides from JSON content")
            
            # Debug: Show first 200 chars of content
            logger.info(f"JSON content preview: {str(extractedContent)[:200]}...")
            
            # Store prs reference for image methods
            self._currentPresentation = prs
            
            for i, slide_data in enumerate(slidesData):
                slide_sections = slide_data.get("sections", [])
                slide_images = list(slide_data.get("images", []))
                slide_content = slide_data.get('content', '')
                hasSections = slide_sections and len(slide_sections) > 0
                hasImages = len(slide_images) > 0
                isTitleSlide = slide_data.get("_isTitleSlide", False)
                
                logger.info(f"Slide {i+1}: '{slide_data.get('title', 'No title')}' - sections: {len(slide_sections)}, images: {len(slide_images)}, content: {len(slide_content)} chars, titleSlide={isTitleSlide}")
                
                # Title slide uses the built-in Title Slide layout (index 0)
                if isTitleSlide:
                    titleLayout = prs.slide_layouts[0]
                    slide = prs.slides.add_slide(titleLayout)
                    try:
                        titleShape = slide.shapes.title
                        titleShape.text = slide_data.get("title", "")
                        titleStyle = styles.get("title", {})
                        tf = titleShape.text_frame
                        if tf.paragraphs:
                            p = tf.paragraphs[0]
                            p.font.size = Pt(titleStyle.get("font_size", 36))
                            p.font.bold = titleStyle.get("bold", True)
                            tColor = self._getSafeColor(titleStyle.get("color", (31, 78, 121)))
                            p.font.color.rgb = RGBColor(*tColor)
                    except Exception as titleErr:
                        logger.warning(f"Could not style title slide: {titleErr}")
                    # Clear subtitle placeholder
                    try:
                        sub = slide.placeholders[1]
                        sub.text = ""
                    except (KeyError, IndexError):
                        pass
                    continue
                
                # Content slides: use blank layout
                slideLayoutIndex = None
                for idx in [6, 5]:
                    if idx < len(prs.slide_layouts):
                        try:
                            layout = prs.slide_layouts[idx]
                            if len(layout.placeholders) == 0:
                                slideLayoutIndex = idx
                                break
                        except (AttributeError, IndexError):
                            continue
                
                if slideLayoutIndex is None:
                    minPh = float('inf')
                    for idx in range(len(prs.slide_layouts)):
                        try:
                            layout = prs.slide_layouts[idx]
                            phCount = len(layout.placeholders) if hasattr(layout, 'placeholders') else 0
                            if phCount < minPh:
                                minPh = phCount
                                slideLayoutIndex = idx
                        except:
                            continue
                
                if slideLayoutIndex is None:
                    slideLayoutIndex = 0
                
                slide_layout = prs.slide_layouts[slideLayoutIndex]
                slide = prs.slides.add_slide(slide_layout)
                
                try:
                    for shape in slide.shapes:
                        if hasattr(shape, 'is_placeholder') and shape.is_placeholder:
                            try:
                                if hasattr(shape, 'text_frame'):
                                    shape.text_frame.clear()
                                    if len(shape.text_frame.paragraphs) > 0:
                                        shape.text_frame.paragraphs[0].text = ""
                            except:
                                pass
                except Exception as placeholder_error:
                    logger.warning(f"Could not clear placeholders: {str(placeholder_error)}")
                
                # Add title as textbox
                from pptx.util import Inches
                titleBox = slide.shapes.add_textbox(Inches(0.5), Inches(0.2), prs.slide_width - Inches(1), Inches(0.6))
                titleFrame = titleBox.text_frame
                titleFrame.text = slide_data.get("title", "Slide")
                title_style = styles.get("title", {})
                # Smaller title size for slides (default 32 instead of 44)
                title_font_size = title_style.get("font_size", 32)
                # Reduce further for slides (max 32pt, min 10pt for readability)
                title_font_size = max(10, min(title_font_size, 32))
                titleFrame.paragraphs[0].font.size = Pt(title_font_size)
                titleFrame.paragraphs[0].font.bold = title_style.get("bold", True)
                title_color = self._getSafeColor(title_style.get("color", (31, 78, 121)))
                titleFrame.paragraphs[0].font.color.rgb = RGBColor(*title_color)
                titleFrame.paragraphs[0].alignment = PP_ALIGN.LEFT
                titleFrame.word_wrap = True
                
                # Render sections with proper PowerPoint objects (tables, lists, etc.)
                # Organize content into frames for better layout
                if hasSections:
                    # Organize sections into content groups for frame-based layout
                    # Images are handled within the frame rendering method
                    self._renderSlideContentWithFrames(slide, slide_sections, slide_images, styles, prs)
                
                # Fallback: if no sections but has content text, render in textbox
                elif slide_content and not hasImages:
                    # Create textbox for content (no placeholders in blank layout)
                    from pptx.util import Inches
                    title_height_used = Inches(1.0)  # Title height for blank slides
                    content_left = Inches(0.5)
                    content_top = title_height_used + Inches(0.3)
                    content_width = prs.slide_width - Inches(1)
                    content_height = prs.slide_height - content_top - Inches(0.5)
                    content_textbox = slide.shapes.add_textbox(content_left, content_top, content_width, content_height)
                    text_frame = content_textbox.text_frame
                    text_frame.word_wrap = True
                    text_frame.auto_size = None
                    
                    # Split content into paragraphs
                    paragraphs = slide_content.split('\n\n')
                    
                    for paragraph in paragraphs:
                        if paragraph.strip():
                            p = text_frame.add_paragraph()
                            p.text = paragraph.strip()
                            
                            # Apply AI-generated styling with adaptive sizing
                            paragraph_style = styles.get("paragraph", {})
                            base_font_size = paragraph_style.get("font_size", 18)
                            # Calculate adaptive font size based on content length
                            try:
                                total_chars = len(slide_content)
                                chars_per_line = max(1, int(content_width / Pt(10)))
                                lines_needed = total_chars / chars_per_line
                                available_lines = max(1, int(content_height / Pt(14)))
                                font_multiplier = 1.0
                                if available_lines > 0 and lines_needed > available_lines:
                                    font_multiplier = max(0.6, min(1.0, (available_lines / lines_needed) * 1.1))
                                calculated_size = max(6, int(base_font_size * font_multiplier))  # Minimum 6pt
                            except (ZeroDivisionError, ValueError, TypeError):
                                calculated_size = max(6, base_font_size)  # Fallback to base size with minimum
                            
                            p.font.size = Pt(calculated_size)
                            p.font.bold = paragraph_style.get("bold", False)
                            paragraph_color = self._getSafeColor(paragraph_style.get("color", (47, 47, 47)))
                            p.font.color.rgb = RGBColor(*paragraph_color)
                            
                            # Apply alignment
                            align = paragraph_style.get("align", "left")
                            if align == "center":
                                p.alignment = PP_ALIGN.CENTER
                            elif align == "right":
                                p.alignment = PP_ALIGN.RIGHT
                            else:
                                p.alignment = PP_ALIGN.LEFT
            
            # If no slides were created, create a single slide with the document title
            if not slidesData:
                slide_layout = prs.slide_layouts[0]
                slide = prs.slides.add_slide(slide_layout)
                
                title_shape = slide.shapes.title
                title_shape.text = title
                
                title_style = styles.get("title", {})
                if title_shape.text_frame.paragraphs[0].font:
                    title_shape.text_frame.paragraphs[0].font.size = Pt(title_style.get("font_size", 48))
                    title_shape.text_frame.paragraphs[0].font.bold = title_style.get("bold", True)
                    title_color = self._getSafeColor(title_style.get("color", (31, 78, 121)))
                    title_shape.text_frame.paragraphs[0].font.color.rgb = RGBColor(*title_color)
                
                # Clear subtitle placeholder instead of adding filler text
                try:
                    subtitle_shape = slide.placeholders[1]
                    subtitle_shape.text = ""
                except (KeyError, IndexError):
                    pass
            
            # Save to buffer
            buffer = io.BytesIO()
            prs.save(buffer)
            buffer.seek(0)
            
            # Convert to base64
            pptx_bytes = buffer.getvalue()
            pptx_base64 = base64.b64encode(pptx_bytes).decode('utf-8')
            
            logger.info(f"Successfully rendered PowerPoint presentation: {len(pptx_bytes)} bytes")
            
            # Determine filename from document or title
            documents = extractedContent.get("documents", [])
            if documents and isinstance(documents[0], dict):
                filename = documents[0].get("filename")
                if not filename:
                    filename = self._determineFilename(title, "application/vnd.openxmlformats-officedocument.presentationml.presentation")
            else:
                filename = self._determineFilename(title, "application/vnd.openxmlformats-officedocument.presentationml.presentation")
            
            # Extract metadata for document type and other info
            metadata = extractedContent.get("metadata", {}) if extractedContent else {}
            documentType = metadata.get("documentType") if isinstance(metadata, dict) else None
            
            return [
                RenderedDocument(
                    documentData=pptx_bytes,
                    mimeType="application/vnd.openxmlformats-officedocument.presentationml.presentation",
                    filename=filename,
                    documentType=documentType,
                    metadata=metadata if isinstance(metadata, dict) else None
                )
            ]
            
        except ImportError:
            logger.error("python-pptx library not installed. Install with: pip install python-pptx")
            fallbackContent = "python-pptx library not installed"
            metadata = extractedContent.get("metadata", {}) if extractedContent else {}
            documentType = metadata.get("documentType") if isinstance(metadata, dict) else None
            return [
                RenderedDocument(
                    documentData=fallbackContent.encode('utf-8'),
                    mimeType="text/plain",
                    filename=self._determineFilename(title, "text/plain"),
                    documentType=documentType,
                    metadata=metadata if isinstance(metadata, dict) else None
                )
            ]
        except Exception as e:
            logger.error(f"Error rendering PowerPoint presentation: {str(e)}")
            fallbackContent = f"Error rendering PowerPoint presentation: {str(e)}"
            metadata = extractedContent.get("metadata", {}) if extractedContent else {}
            documentType = metadata.get("documentType") if isinstance(metadata, dict) else None
            return [
                RenderedDocument(
                    documentData=fallbackContent.encode('utf-8'),
                    mimeType="text/plain",
                    filename=self._determineFilename(title, "text/plain"),
                    documentType=documentType,
                    metadata=metadata if isinstance(metadata, dict) else None
                )
            ]
    
    def _parseContentToSlides(self, content: str, title: str) -> list:
        """
        Parse content into slide data structure.
        
        Args:
            content: Content to parse
            title: Presentation title
        
        Returns:
            List of slide data dictionaries
        """
        slides = []
        
        # Split content by slide markers or headers
        slide_sections = self._splitContentIntoSlides(content)
        
        for i, section in enumerate(slide_sections):
            if section.strip():
                slide_data = {
                    "title": f"Slide {i + 1}",
                    "content": section.strip()
                }
                
                # Extract title from content if it starts with #
                lines = section.strip().split('\n')
                if lines and lines[0].startswith('#'):
                    # Remove # symbols and clean up title
                    slide_title = lines[0].lstrip('#').strip()
                    slide_data["title"] = slide_title
                    slide_data["content"] = '\n'.join(lines[1:]).strip()
                elif lines and lines[0].strip():
                    # Use first line as title if it looks like a title
                    first_line = lines[0].strip()
                    if len(first_line) < 100 and not first_line.endswith('.'):
                        slide_data["title"] = first_line
                        slide_data["content"] = '\n'.join(lines[1:]).strip()
                
                slides.append(slide_data)
        
        return slides
    
    def _splitContentIntoSlides(self, content: str) -> list:
        """
        Split content into individual slides based on headers and structure.
        
        Args:
            content: Content to split
        
        Returns:
            List of slide content strings
        """
        # re is already imported at module level
        
        # First, try to split by major headers (# or ##)
        # This is the most common case for AI-generated content
        header_pattern = r'^(#{1,2})\s+(.+)$'
        lines = content.split('\n')
        slides = []
        current_slide = []
        
        for line in lines:
            # Check if this line is a header
            header_match = re.match(header_pattern, line.strip())
            if header_match:
                # If we have content in current slide, save it
                if current_slide:
                    slide_content = '\n'.join(current_slide).strip()
                    if slide_content:
                        slides.append(slide_content)
                    current_slide = []
                
                # Start new slide with this header
                current_slide.append(line)
            else:
                # Add line to current slide
                current_slide.append(line)
        
        # Add the last slide
        if current_slide:
            slide_content = '\n'.join(current_slide).strip()
            if slide_content:
                slides.append(slide_content)
        
        # If we found slides with headers, return them
        if len(slides) > 1:
            return slides
        
        # Fallback: Split by double newlines
        sections = content.split('\n\n\n')
        if len(sections) > 1:
            return [s.strip() for s in sections if s.strip()]
        
        # Another fallback: Split by double newlines
        sections = content.split('\n\n')
        if len(sections) > 1:
            return [s.strip() for s in sections if s.strip()]
        
        # Last resort: return as single slide
        return [content.strip()]
    
    
    def getOutputMimeType(self) -> str:
        """Get MIME type for rendered output."""
        return self.outputMimeType
    
    async def _getStyleSet(self, extractedContent: Dict[str, Any] = None, userPrompt: str = None, aiService=None, templateName: str = None) -> Dict[str, Any]:
        """Get style set - use styles from document generation metadata if available,
        otherwise enhance default styles with AI if userPrompt provided.
        
        WICHTIG: In a dynamic scalable AI system, styling should come from document generation,
        not be generated separately by renderers. Only fall back to AI if styles not provided.
        
        Args:
            extractedContent: Document content with metadata (may contain styles)
            userPrompt: User's prompt (AI will detect style instructions in any language)
            aiService: AI service (used only if styles not in metadata and userPrompt provided)
            templateName: Name of template style set (None = default)
            
        Returns:
            Dict with style definitions for all document styles
        """
        # Get default style set
        defaultStyleSet = self._getDefaultStyleSet()
        
        # FIRST: Check if styles are provided in document generation metadata (preferred approach)
        if extractedContent:
            metadata = extractedContent.get("metadata", {})
            if isinstance(metadata, dict):
                styles = metadata.get("styles")
                if styles and isinstance(styles, dict):
                    self.logger.debug("Using styles from document generation metadata")
                    enhancedStyleSet = self._convertColorsFormat(styles)
                    return self._validateStylesReadability(enhancedStyleSet)
        
        # FALLBACK: Enhance with AI if userPrompt provided (only if styles not in metadata)
        if userPrompt and aiService:
            self.logger.info(f"Styles not in metadata, enhancing with AI based on user prompt...")
            enhancedStyleSet = await self._enhanceStylesWithAI(userPrompt, defaultStyleSet, aiService)
            # Colors already converted in _getAiStylesWithPptxColors
            return self._validateStylesReadability(enhancedStyleSet)
        else:
            # Use default styles only
            return defaultStyleSet
    
    async def _enhanceStylesWithAI(self, userPrompt: str, defaultStyleSet: Dict[str, Any], aiService) -> Dict[str, Any]:
        """Enhance default styles with AI based on user prompt."""
        try:
            style_template = self._createProfessionalPptxTemplate(userPrompt, defaultStyleSet)
            enhanced_styles = await self._getAiStylesWithPptxColors(aiService, style_template, defaultStyleSet)
            return enhanced_styles
        except Exception as e:
            self.logger.warning(f"AI style enhancement failed: {str(e)}, using default styles")
            return defaultStyleSet
    
    def _validateStylesReadability(self, styles: Dict[str, Any]) -> Dict[str, Any]:
        """Validate and fix readability issues in AI-generated styles."""
        try:
            # Ensure minimum font sizes for PowerPoint readability
            min_font_sizes = {
                "title": 36,
                "heading": 24,
                "subheading": 20,
                "paragraph": 14,
                "bullet_list": 14,
                "table_header": 12,
                "table_cell": 12
            }
            
            for style_name, min_size in min_font_sizes.items():
                if style_name in styles:
                    current_size = styles[style_name].get("font_size", 12)
                    if current_size < min_size:
                        styles[style_name]["font_size"] = min_size
            
            return styles
            
        except Exception as e:
            logger.warning(f"Style validation failed: {str(e)}")
            return self._getDefaultStyleSet()
    
    def _getDefaultStyleSet(self) -> Dict[str, Any]:
        """Default PowerPoint style set - used when no style instructions present."""
        return {
            "title": {"font_size": 32, "color": "#1B365D", "bold": True, "align": "left"},
            "heading": {"font_size": 24, "color": "#1B365D", "bold": True, "align": "left"},
            "subheading": {"font_size": 20, "color": "#4A90E2", "bold": True, "align": "left"},
            "paragraph": {"font_size": 14, "color": "#2F2F2F", "bold": False, "align": "left"},
            "bullet_list": {"font_size": 14, "color": "#2F2F2F", "indent": 20},
            "table_header": {"font_size": 18, "color": "#FFFFFF", "bold": True, "background": "#1B365D"},
            "table_cell": {"font_size": 16, "color": "#2F2F2F", "bold": False, "background": "#F8F9FA"},
            "slide_size": "16:9",
            "content_per_slide": "concise",
            "design_theme": "corporate",
            "color_scheme": "professional",
            "background_style": "clean",
            "accent_colors": ["#1B365D", "#2C5F2D", "#4A90E2", "#6B7280"],
            "professional_grade": True,
            "executive_ready": True
        }
    
    def _createProfessionalPptxTemplate(self, userPrompt: str, style_schema: Dict[str, Any]) -> str:
        """Create a professional PowerPoint-specific AI style template for corporate-quality slides."""
        # json is already imported at module level
        schema_json = json.dumps(style_schema, indent=4)
        
        return f"""Customize the JSON below for professional PowerPoint slides.

User Request: {userPrompt or "Create professional corporate slides"}

Rules:
- Use professional colors (blues, grays, deep greens)
- Large, readable font sizes
- High contrast
- Sophisticated color palettes

Return ONLY this JSON with your changes:

{schema_json}

JSON ONLY. NO OTHER TEXT."""
    
    async def _getAiStylesWithPptxColors(self, aiService, style_template: str, default_styles: Dict[str, Any]) -> Dict[str, Any]:
        """Get AI styles with proper PowerPoint color conversion. Uses base _getAiStyles for debug file writing."""
        if not aiService:
            return default_styles
        
        try:
            # Use base template method which handles debug file writing
            enhanced_styles = await self._getAiStyles(aiService, style_template, default_styles)
            
            # Convert colors to PPTX format (RGB tuples)
            return self._convertColorsFormat(enhanced_styles)
            
        except Exception as e:
            self.logger.warning(f"AI style enhancement failed: {str(e)}, using defaults")
            return default_styles

    def _convertColorsFormat(self, styles: Dict[str, Any]) -> Dict[str, Any]:
        """Convert hex colors to RGB format for PowerPoint compatibility."""
        try:
            for style_name, style_config in styles.items():
                if isinstance(style_config, dict):
                    for prop, value in style_config.items():
                        if isinstance(value, str) and value.startswith('#'):
                            # Convert hex to RGB tuple for PowerPoint
                            hex_color = value.lstrip('#')
                            if len(hex_color) == 6:
                                r = int(hex_color[0:2], 16)
                                g = int(hex_color[2:4], 16)
                                b = int(hex_color[4:6], 16)
                                styles[style_name][prop] = (r, g, b)
                            elif len(hex_color) == 8:  # aRGB format
                                r = int(hex_color[2:4], 16)
                                g = int(hex_color[4:6], 16)
                                b = int(hex_color[6:8], 16)
                                styles[style_name][prop] = (r, g, b)
            return styles
        except Exception as e:
            self.logger.warning(f"Color conversion failed: {str(e)}")
            return styles

    def _getSafeColor(self, color_value, default=(0, 0, 0)) -> tuple:
        """Get a safe RGB color tuple for PowerPoint."""
        if isinstance(color_value, tuple) and len(color_value) == 3:
            return color_value
        elif isinstance(color_value, str) and color_value.startswith('#'):
            hex_color = color_value.lstrip('#')
            if len(hex_color) == 6:
                r = int(hex_color[0:2], 16)
                g = int(hex_color[2:4], 16)
                b = int(hex_color[4:6], 16)
                return (r, g, b)
            elif len(hex_color) == 8:  # aRGB format
                r = int(hex_color[2:4], 16)
                g = int(hex_color[4:6], 16)
                b = int(hex_color[6:8], 16)
                return (r, g, b)
        return default
    
    
    async def _parseJsonToSlides(self, json_content: Dict[str, Any], title: str, styles: Dict[str, Any]) -> List[Dict[str, Any]]:
        """
        Parse JSON content into slide data structure.
        
        Args:
            json_content: JSON content to parse
            title: Presentation title
            styles: AI-generated styles
        
        Returns:
            List of slide data dictionaries
        """
        slides = []
        
        try:
            # Validate JSON structure (standardized schema: {metadata: {...}, documents: [{sections: [...]}]})
            if not self._validateJsonStructure(json_content):
                raise ValueError("JSON content must follow standardized schema: {metadata: {...}, documents: [{sections: [...]}]}")
            
            # Extract sections and metadata from standardized schema
            sections = self._extractSections(json_content)
            metadata = self._extractMetadata(json_content)
            
            document_title = title if title else metadata.get("title", "Generated Document")
            
            # Title slide (clean — just the document title, no filler text)
            slides.append({
                "title": document_title,
                "content": "",
                "_isTitleSlide": True,
            })
            
            # Content slides split by chapter headings
            contentSlides = self._createSlidesFromSections(sections, styles)
            if contentSlides:
                slides.extend(contentSlides)
            else:
                slides.append({
                    "title": "Content Overview",
                    "content": ""
                })
            
            return slides
            
        except Exception as e:
            logger.error(f"Error parsing JSON to slides: {str(e)}")
            # Return minimal fallback slides
            return [
                {
                    "title": title,
                    "content": "Error parsing content for presentation"
                }
            ]
    
    def _createSlideFromSection(self, section: Dict[str, Any], styles: Dict[str, Any]) -> Dict[str, Any]:
        """Create a slide from a JSON section."""
        try:
            # Get section title from data or use default
            section_title = "Untitled Section"
            if section.get("content_type") == "heading":
                # Extract text from elements array - use nested content structure
                for element in section.get("elements", []):
                    if isinstance(element, dict):
                        content = element.get("content", {})
                        if isinstance(content, dict):
                            text = content.get("text", "")
                            if text:
                                section_title = text
                                break
            elif section.get("title"):
                section_title = section.get("title")
            
            content_type = section.get("content_type", "paragraph")
            elements = section.get("elements", [])
            
            # Check for three content formats from Phase 5D in elements
            content_parts = []
            for element in elements:
                if not isinstance(element, dict):
                    continue
                    
                element_type = element.get("type", "")
                
                # Support three content formats from Phase 5D
                if element_type == "reference":
                    # Document reference format
                    doc_ref = element.get("documentReference", "")
                    label = element.get("label", "Reference")
                    content_parts.append(f"[Reference: {label}]")
                    continue
                elif element_type == "extracted_text":
                    # Extracted text format
                    content = element.get("content", "")
                    source = element.get("source", "")
                    if content:
                        source_text = f" (Source: {source})" if source else ""
                        content_parts.append(f"{content}{source_text}")
                    continue
            
            # Handle image sections specially
            if content_type == "image":
                # Extract image data from nested content structure
                images = []
                for element in elements:
                    if isinstance(element, dict):
                        # Extract from nested content structure
                        content = element.get("content", {})
                        if isinstance(content, dict):
                            base64Data = content.get("base64Data")
                            altText = content.get("altText", "Image")
                            caption = content.get("caption", "")
                        else:
                            # Fallback to direct element fields
                            base64Data = element.get("base64Data")
                            altText = element.get("altText", "Image")
                            caption = element.get("caption", "")
                        
                        if base64Data:
                            images.append({
                                "base64Data": base64Data,
                                "altText": altText,
                                "caption": caption
                            })
                
                return {
                    "title": section_title or (elements[0].get("content", {}).get("altText", "Image") if elements and isinstance(elements[0], dict) else "Image"),
                    "content": "\n\n".join(content_parts) if content_parts else "",  # Include reference/extracted_text if present
                    "images": images
                }
            
            # Build slide content based on section type - iterate over elements and format each
            if not content_parts:  # Only if we didn't process reference/extracted_text above
                for element in elements:
                    if not isinstance(element, dict):
                        continue
                    
                    element_type = element.get("type", "")
                    # Use element type if available, otherwise fall back to section content_type
                    if not element_type:
                        element_type = content_type
                    
                    if element_type == "table":
                        formatted = self._formatTableForSlide(element)
                        if formatted:
                            content_parts.append(formatted)
                    elif element_type == "bullet_list" or element_type == "list":
                        formatted = self._formatListForSlide(element)
                        if formatted:
                            content_parts.append(formatted)
                    elif element_type == "heading":
                        formatted = self._formatHeadingForSlide(element)
                        if formatted:
                            content_parts.append(formatted)
                    elif element_type == "paragraph":
                        formatted = self._formatParagraphForSlide(element)
                        if formatted:
                            content_parts.append(formatted)
                    elif element_type == "code_block" or element_type == "code":
                        formatted = self._formatCodeForSlide(element)
                        if formatted:
                            content_parts.append(formatted)
                    else:
                        # Fallback to paragraph formatting
                        formatted = self._formatParagraphForSlide(element)
                        if formatted:
                            content_parts.append(formatted)
            
            # Combine content parts
            slide_content = "\n\n".join(filter(None, content_parts))
            
            return {
                "title": section_title,
                "content": slide_content,
                "images": []  # No images for non-image sections
            }
            
        except Exception as e:
            logger.warning(f"Error creating slide from section: {str(e)}")
            return None
    
    def _formatTableForSlide(self, element: Dict[str, Any]) -> str:
        """Format table data for slide presentation."""
        try:
            # Extract table data from element - handle nested content structure
            if not isinstance(element, dict):
                return ""
            
            # Extract from nested content structure
            content = element.get("content", {})
            if not isinstance(content, dict):
                return ""
            
            headers = content.get("headers", [])
            rows = content.get("rows", [])
            
            if not headers:
                return ""
            
            # Create table representation
            table_lines = []
            
            # Add headers
            header_line = " | ".join(str(h) for h in headers)
            table_lines.append(header_line)
            
            # Add separator
            separator = "-" * len(header_line)
            table_lines.append(separator)
            
            # Add data rows (limit based on content density)
            max_rows = 5  # Default limit
            for row in rows[:max_rows]:
                row_line = " | ".join(str(cell) for cell in row)
                table_lines.append(row_line)
            
            if len(rows) > max_rows:
                table_lines.append(f"... and {len(rows) - max_rows} more rows")
            
            return "\n".join(table_lines)
            
        except Exception as e:
            logger.warning(f"Error formatting table for slide: {str(e)}")
            return ""
    
    def _formatListForSlide(self, list_data: Dict[str, Any]) -> str:
        """Format list data for slide presentation."""
        try:
            # Extract from nested content structure
            content = list_data.get("content", {})
            if not isinstance(content, dict):
                return ""
            items = content.get("items", [])
            
            if not items:
                return ""
            
            # Create list representation
            list_lines = []
            
            for item in items:
                if isinstance(item, dict):
                    text = item.get("text", "")
                    list_lines.append(f"• {text}")
                    
                    # Add subitems (limit to 3 for readability)
                    subitems = item.get("subitems", [])[:3]
                    for subitem in subitems:
                        if isinstance(subitem, dict):
                            list_lines.append(f"  - {subitem.get('text', '')}")
                        else:
                            list_lines.append(f"  - {subitem}")
                else:
                    list_lines.append(f"• {str(item)}")
            
            return "\n".join(list_lines)
            
        except Exception as e:
            logger.warning(f"Error formatting list for slide: {str(e)}")
            return ""
    
    def _formatHeadingForSlide(self, heading_data: Dict[str, Any]) -> str:
        """Format heading data for slide presentation."""
        try:
            # Extract from nested content structure
            content = heading_data.get("content", {})
            if not isinstance(content, dict):
                return ""
            text = content.get("text", "")
            level = content.get("level", 1)
            
            if text:
                return f"{'#' * level} {text}"
            
            return ""
            
        except Exception as e:
            logger.warning(f"Error formatting heading for slide: {str(e)}")
            return ""
    
    def _formatParagraphForSlide(self, paragraph_data: Dict[str, Any]) -> str:
        """Format paragraph data for slide presentation."""
        try:
            # Extract from nested content structure
            content = paragraph_data.get("content", {})
            if isinstance(content, dict):
                if content.get("inlineRuns"):
                    text = "".join(r.get("value", "") for r in content["inlineRuns"])
                else:
                    text = content.get("text", "")
            elif isinstance(content, str):
                text = content
            else:
                text = ""
            
            if text:
                max_length = 200
                if len(text) > max_length:
                    text = text[:max_length] + "..."
                
                return text
            
            return ""
            
        except Exception as e:
            logger.warning(f"Error formatting paragraph for slide: {str(e)}")
            return ""
    
    def _formatCodeForSlide(self, code_data: Dict[str, Any]) -> str:
        """Format code data for slide presentation."""
        try:
            # Extract from nested content structure
            content = code_data.get("content", {})
            if not isinstance(content, dict):
                return ""
            code = content.get("code", "")
            language = content.get("language", "")
            
            if code:
                # Limit code length based on content density
                max_length = 100  # Default limit
                if len(code) > max_length:
                    code = code[:max_length] + "..."
                
                if language:
                    return f"Code ({language}):\n{code}"
                else:
                    return f"Code:\n{code}"
            
            return ""
            
        except Exception as e:
            logger.warning(f"Error formatting code for slide: {str(e)}")
            return ""
    
    def _getSlideLayoutIndex(self, slide_data: Dict[str, Any], styles: Dict[str, Any]) -> int:
        """Determine the best professional slide layout based on content."""
        try:
            content = slide_data.get("content", "")
            title = slide_data.get("title", "")
            
            if not content:
                return 0
            
            # Professional layout selection based on content
            if "|" in content and "-" in content:
                # Has both tables and lists - use content with caption for professional look
                return 2
            elif "|" in content:
                # Has tables - use content layout for clean table presentation
                return 1
            elif content.count("•") > 2:
                # Has many bullet points - use content layout for better readability
                return 1
            elif len(content) > 200:
                # Long content - use content layout for better text flow
                return 1
            elif title and len(title) > 20:
                # Long title - use title and content layout
                return 1
            else:
                # Default to title and content layout for professional appearance
                return 1
                
        except Exception as e:
            logger.warning(f"Error determining slide layout: {str(e)}")
            return 1  # Default to title and content layout
    
    def _createSlidesFromSections(self, sections: List[Dict[str, Any]], styles: Dict[str, Any]) -> List[Dict[str, Any]]:
        """Create slides from sections: each top-level heading creates a new slide.
        
        The split level is determined dynamically: if there is exactly one H1 (the
        document title), chapters are H2; otherwise chapters are H1.
        """
        try:
            # First pass: discover heading levels to choose the split level
            headingLevels: List[int] = []
            for section in sections:
                if section.get("content_type") == "heading":
                    for el in section.get("elements", []):
                        if isinstance(el, dict):
                            c = el.get("content", {})
                            if isinstance(c, dict):
                                headingLevels.append(c.get("level", 1))

            h1Count = headingLevels.count(1)
            h2Count = headingLevels.count(2)
            # If there's at most one H1 but multiple H2s, split on H2
            splitLevel = 2 if h1Count <= 1 and h2Count > 1 else 1

            slides = []
            currentSlideSections = []
            currentSlideTitle = "Content Overview"
            
            for section in sections:
                sectionType = section.get("content_type", "paragraph")
                elements = section.get("elements", [])
                
                if not elements and sectionType != "heading":
                    continue
                
                if sectionType == "heading":
                    level = 1
                    headingText = ""
                    for element in elements:
                        if isinstance(element, dict):
                            content = element.get("content", {})
                            if isinstance(content, dict):
                                headingText = content.get("text", "")
                                level = content.get("level", 1)
                            elif isinstance(content, str):
                                headingText = content
                                level = 1
                    
                    if level <= splitLevel:
                        if currentSlideSections:
                            slides.append({
                                "title": currentSlideTitle,
                                "sections": currentSlideSections.copy(),
                                "images": []
                            })
                            currentSlideSections = []
                        currentSlideTitle = headingText or section.get("id", "Untitled Section")
                    else:
                        currentSlideSections.append(section)
                elif sectionType == "image":
                    currentSlideSections.append(section)
                else:
                    currentSlideSections.append(section)
            
            if currentSlideSections:
                slides.append({
                    "title": currentSlideTitle,
                    "sections": currentSlideSections.copy(),
                    "images": []
                })
            
            return slides
            
        except Exception as e:
            logger.warning(f"Error creating slides from sections: {str(e)}")
            return []
    
    def _formatSectionContent(self, section: Dict[str, Any]) -> str:
        """Format section content for slide presentation."""
        try:
            content_type = section.get("content_type", "paragraph")
            elements = section.get("elements", [])
            
            # Image sections return empty content (handled separately)
            if content_type == "image":
                return ""
            
            # Process each element in the section - use element type, not section type
            content_parts = []
            for element in elements:
                if not isinstance(element, dict):
                    continue
                
                element_type = element.get("type", "")
                # Use element type if available, otherwise fall back to section content_type
                if not element_type:
                    element_type = content_type
                
                if element_type == "table":
                    formatted = self._formatTableForSlide(element)
                    if formatted:
                        content_parts.append(formatted)
                elif element_type == "bullet_list" or element_type == "list":
                    formatted = self._formatListForSlide(element)
                    if formatted:
                        content_parts.append(formatted)
                elif element_type == "heading":
                    formatted = self._formatHeadingForSlide(element)
                    if formatted:
                        content_parts.append(formatted)
                elif element_type == "paragraph":
                    formatted = self._formatParagraphForSlide(element)
                    if formatted:
                        content_parts.append(formatted)
                elif element_type == "code_block" or element_type == "code":
                    formatted = self._formatCodeForSlide(element)
                    if formatted:
                        content_parts.append(formatted)
                else:
                    # Fallback to paragraph formatting
                    formatted = self._formatParagraphForSlide(element)
                    if formatted:
                        content_parts.append(formatted)
            
            return "\n\n".join(filter(None, content_parts))
                
        except Exception as e:
            logger.warning(f"Error formatting section content: {str(e)}")
            return ""
    
    def _addImagesToSlide(self, slide, images: List[Dict[str, Any]], styles: Dict[str, Any]) -> None:
        """Add images to a PowerPoint slide."""
        try:
            from pptx.util import Inches, Pt
            from pptx.enum.text import PP_ALIGN
            from pptx.dml.color import RGBColor
            import base64
            import io
            
            if not images:
                return
            
            # Get slide dimensions from presentation
            if hasattr(self, '_currentPresentation'):
                prs = self._currentPresentation
            else:
                prs = slide.presentation
            slideWidth = prs.slide_width
            slideHeight = prs.slide_height
            titleHeight = Inches(1.5)  # Approximate title height
            
            # Available area for images
            availableWidth = slideWidth - Inches(1)  # Margins
            availableHeight = slideHeight - titleHeight - Inches(1)  # Title + margins
            
            # Position images
            if len(images) == 1:
                # Single image: center it
                img = images[0]
                base64Data = img.get("base64Data")
                # Validate base64Data is present and not empty
                if not base64Data or not isinstance(base64Data, str) or len(base64Data.strip()) == 0:
                    logger.error(f"Invalid base64Data: present={bool(base64Data)}, type={type(base64Data)}, length={len(base64Data) if base64Data else 0}")
                    return
                
                try:
                    imageBytes = base64.b64decode(base64Data)
                    if len(imageBytes) == 0:
                        logger.error("Decoded image bytes are empty")
                        return
                    imageStream = io.BytesIO(imageBytes)
                except Exception as decode_error:
                    logger.error(f"Failed to decode base64 image data: {str(decode_error)}")
                    return
                
                # Get image dimensions
                try:
                    from PIL import Image as PILImage
                    pilImage = PILImage.open(imageStream)
                    imgWidth, imgHeight = pilImage.size
                    
                    # Scale to fit available space (max 90% of slide for better visibility)
                    # Convert PIL pixels to PowerPoint points (1 inch = 72 points, typical screen DPI = 96)
                    # Conversion: pixels * (72/96) = points
                    imgWidthPoints = imgWidth * (72.0 / 96.0)
                    imgHeightPoints = imgHeight * (72.0 / 96.0)
                    
                    maxWidth = availableWidth * 0.9
                    maxHeight = availableHeight * 0.9
                    
                    scale = min(maxWidth / imgWidthPoints, maxHeight / imgHeightPoints, 1.0)
                    finalWidth = imgWidthPoints * scale
                    finalHeight = imgHeightPoints * scale
                    
                    # Center image
                    left = (slideWidth - finalWidth) / 2
                    top = titleHeight + (availableHeight - finalHeight) / 2
                    
                    imageStream.seek(0)
                except Exception:
                    # Fallback: use default size
                    finalWidth = Inches(6)
                    finalHeight = Inches(4.5)
                    left = (slideWidth - finalWidth) / 2
                    top = titleHeight + Inches(1)
                    imageStream.seek(0)
                
                # Add image to slide
                try:
                    slide.shapes.add_picture(imageStream, left, top, width=finalWidth, height=finalHeight)
                except Exception as add_error:
                    # If add_picture fails, try with explicit format
                    imageStream.seek(0)
                    # Ensure we have valid image data
                    if len(imageBytes) > 0:
                        slide.shapes.add_picture(imageStream, left, top, width=finalWidth, height=finalHeight)
                    else:
                        raise Exception(f"Empty image data: {add_error}")
                
                # Add caption if available
                caption = img.get("caption") or img.get("altText")
                if caption and caption != "Image":
                    # Add text box below image
                    captionTop = top + finalHeight + Inches(0.2)
                    captionBox = slide.shapes.add_textbox(
                        Inches(1),
                        captionTop,
                        slideWidth - Inches(2),
                        Inches(0.5)
                    )
                    captionFrame = captionBox.text_frame
                    captionFrame.text = caption
                    captionFrame.paragraphs[0].font.size = Pt(12)
                    captionFrame.paragraphs[0].font.italic = True
                    captionFrame.paragraphs[0].alignment = PP_ALIGN.CENTER
            else:
                # Multiple images: arrange in grid
                cols = 2 if len(images) <= 4 else 3
                rows = (len(images) + cols - 1) // cols
                
                imgWidth = (availableWidth - Inches(0.5) * (cols - 1)) / cols
                imgHeight = (availableHeight - Inches(0.5) * (rows - 1)) / rows
                
                for idx, img in enumerate(images):
                    base64Data = img.get("base64Data")
                    if base64Data:
                        row = idx // cols
                        col = idx % cols
                        
                        imageBytes = base64.b64decode(base64Data)
                        imageStream = io.BytesIO(imageBytes)
                        
                        left = Inches(0.5) + col * (imgWidth + Inches(0.5))
                        top = titleHeight + Inches(0.5) + row * (imgHeight + Inches(0.5))
                        
                        slide.shapes.add_picture(imageStream, left, top, width=imgWidth, height=imgHeight)
                        
        except Exception as e:
            logger.error(f"Error embedding images in PPTX slide: {str(e)}")
            import traceback
            logger.error(f"Traceback: {traceback.format_exc()}")
    
    def _addMarkdownInlineRuns(self, paragraph, text: str, fontSize=None, fontColor=None, fontBold=None) -> None:
        """Parse markdown inline formatting and add Runs to a pptx paragraph.
        
        Every piece of text is added as an explicit Run with font properties set,
        so the paragraph never falls back to the slide-master default font.
        """
        from pptx.util import Pt

        paragraph.text = ""

        def _applyBase(run, bold=None):
            if fontSize:
                run.font.size = fontSize
            if fontColor:
                run.font.color.rgb = fontColor
            if bold is not None:
                run.font.bold = bold
            elif fontBold is not None:
                run.font.bold = fontBold

        pos = 0
        for m in _PPTX_MD_INLINE_RE.finditer(text):
            if m.start() > pos:
                r = paragraph.add_run()
                r.text = text[pos:m.start()]
                _applyBase(r)
            if m.group(2) or m.group(4):
                r = paragraph.add_run()
                r.text = m.group(2) or m.group(4)
                _applyBase(r, bold=True)
            elif m.group(5) or m.group(6):
                r = paragraph.add_run()
                r.text = m.group(5) or m.group(6)
                r.font.italic = True
                _applyBase(r)
            elif m.group(7):
                r = paragraph.add_run()
                r.text = m.group(7)
                r.font.name = "Courier New"
                if fontSize and hasattr(fontSize, 'pt'):
                    r.font.size = Pt(max(8, int(fontSize.pt * 0.85)))
                elif fontSize:
                    r.font.size = fontSize
                if fontColor:
                    r.font.color.rgb = fontColor
            pos = m.end()

        # Remaining tail (or entire string if no matches)
        if pos < len(text):
            r = paragraph.add_run()
            r.text = text[pos:]
            _applyBase(r)

    def _renderInlineRunsPptx(self, runs, paragraph, fontSize=None, fontColor=None):
        """Process InlineRun dicts into pptx text runs."""
        from pptx.util import Pt
        paragraph.text = ""
        us = getattr(self, '_unifiedStyle', None)
        monoFont = us["fonts"]["monospace"] if us else "Courier New"
        for run in runs:
            runType = run.get("type", "text")
            value = run.get("value", "")
            r = paragraph.add_run()
            r.text = value
            if fontSize:
                r.font.size = fontSize
            if fontColor:
                r.font.color.rgb = fontColor
            if runType == "bold":
                r.font.bold = True
            elif runType == "italic":
                r.font.italic = True
            elif runType == "code":
                r.font.name = monoFont
                if fontSize and hasattr(fontSize, 'pt'):
                    r.font.size = Pt(max(8, int(fontSize.pt * 0.85)))
            elif runType == "link":
                r.font.underline = True

    def _addTableToSlide(self, slide, element: Dict[str, Any], styles: Dict[str, Any], top: float = None, max_width: float = None) -> None:
        """Add a PowerPoint table to slide."""
        try:
            from pptx.util import Inches, Pt
            from pptx.enum.text import PP_ALIGN
            from pptx.dml.color import RGBColor
            
            content = element.get("content", {})
            if not isinstance(content, dict):
                return
            
            headers = content.get("headers", [])
            rows = content.get("rows", [])
            
            if not headers:
                return
            
            num_cols = int(len(headers))
            num_rows = int(len(rows) + 1)
            left = Inches(0.5)
            if hasattr(self, '_currentPresentation'):
                prs = self._currentPresentation
            else:
                prs = slide.presentation
            width = max_width if max_width is not None else (prs.slide_width - Inches(1))
            row_height = Inches(0.4)
            
            # Auto-calculate top from existing shapes when not specified
            if top is None:
                maxBottom = Inches(1.5)
                for shape in slide.shapes:
                    shapeBottom = shape.top + shape.height
                    if shapeBottom > maxBottom:
                        maxBottom = shapeBottom
                top = maxBottom + Inches(0.15)
            
            table_height = row_height * num_rows
            table_shape = slide.shapes.add_table(num_rows, num_cols, left, top, width, table_height)
            table = table_shape.table
            
            # Set column widths - width is in EMU, divide evenly
            # python-pptx expects EMU values (914400 EMU = 1 inch)
            col_width_emu = int(width) // num_cols  # Ensure integer division for EMU
            for col_idx in range(num_cols):
                table.columns[col_idx].width = col_width_emu
            
            # Add headers with styling - OPTIMIZED: pre-calculate color/style objects
            header_style = styles.get("table_header", {})
            header_bg_color = self._getSafeColor(header_style.get("background", (31, 78, 121)))
            header_text_color = self._getSafeColor(header_style.get("text_color", (255, 255, 255)))
            header_font_size = header_style.get("font_size", 18)
            
            # Pre-calculate and cache RGB color objects
            header_bg_rgb = RGBColor(*header_bg_color)
            header_text_rgb = RGBColor(*header_text_color)
            header_font_size_pt = Pt(header_font_size)
            header_bold = header_style.get("bold", True)
            
            # Determine alignment once
            align = header_style.get("align", "center")
            if align == "left":
                header_alignment = PP_ALIGN.LEFT
            elif align == "right":
                header_alignment = PP_ALIGN.RIGHT
            else:
                header_alignment = PP_ALIGN.CENTER
            
            for col_idx, header in enumerate(headers):
                cell = table.cell(0, col_idx)
                # Clear existing text and set new text
                cell.text_frame.clear()
                cellRuns = self._inlineRunsForCell(header)
                header_text = "".join(r.get("value", "") for r in cellRuns)
                cell.text = header_text
                
                # Ensure paragraph exists
                if len(cell.text_frame.paragraphs) == 0:
                    cell.text_frame.add_paragraph()
                
                # Apply styling - use cached objects
                cell.fill.solid()
                cell.fill.fore_color.rgb = header_bg_rgb
                para = cell.text_frame.paragraphs[0]
                para.font.bold = header_bold
                para.font.size = header_font_size_pt
                para.font.color.rgb = header_text_rgb
                para.alignment = header_alignment
                
                # Ensure text is set on paragraph
                if not para.text:
                    para.text = header_text
            
            # Add data rows with styling - OPTIMIZED: pre-calculate color/style objects
            cell_style = styles.get("table_cell", {})
            cell_bg_color = self._getSafeColor(cell_style.get("background", (255, 255, 255)))
            cell_text_color = self._getSafeColor(cell_style.get("text_color", (47, 47, 47)))
            cell_font_size = cell_style.get("font_size", 16)
            
            # Pre-calculate and cache RGB color objects
            cell_bg_rgb = RGBColor(*cell_bg_color)
            cell_text_rgb = RGBColor(*cell_text_color)
            cell_font_size_pt = Pt(cell_font_size)
            cell_bold = cell_style.get("bold", False)
            
            # Determine alignment once
            align = cell_style.get("align", "left")
            if align == "center":
                cell_alignment = PP_ALIGN.CENTER
            elif align == "right":
                cell_alignment = PP_ALIGN.RIGHT
            else:
                cell_alignment = PP_ALIGN.LEFT
            
            for row_idx, row_data in enumerate(rows, 1):
                for col_idx, cell_data in enumerate(row_data[:num_cols]):
                    cell = table.cell(row_idx, col_idx)
                    # Clear existing text and set new text
                    cell.text_frame.clear()
                    cellRuns = self._inlineRunsForCell(cell_data)
                    cell_text = "".join(r.get("value", "") for r in cellRuns)
                    cell.text = cell_text
                    
                    # Ensure paragraph exists
                    if len(cell.text_frame.paragraphs) == 0:
                        cell.text_frame.add_paragraph()
                    
                    # Apply styling - use cached objects
                    cell.fill.solid()
                    cell.fill.fore_color.rgb = cell_bg_rgb
                    para = cell.text_frame.paragraphs[0]
                    para.font.size = cell_font_size_pt
                    para.font.bold = cell_bold
                    para.font.color.rgb = cell_text_rgb
                    para.alignment = cell_alignment
                    
                    # Ensure text is set on paragraph
                    if not para.text:
                        para.text = cell_text
                    
        except Exception as e:
            logger.warning(f"Error adding table to slide: {str(e)}")
    
    def _addBulletListToSlide(self, slide, element: Dict[str, Any], styles: Dict[str, Any], text_frame, font_size_multiplier: float = 1.0) -> None:
        """Add bullet list to slide text frame with consistent formatting."""
        try:
            from pptx.util import Pt
            from pptx.dml.color import RGBColor
            from pptx.enum.text import PP_ALIGN
            
            content = element.get("content", {})
            if not isinstance(content, dict):
                return
            items = content.get("items", [])
            if not items:
                return
            
            listStyle = styles.get("paragraph", {})
            fontSize = Pt(max(10, int(listStyle.get("font_size", 14) * font_size_multiplier)))
            fontColor = RGBColor(*self._getSafeColor(listStyle.get("color", (47, 47, 47))))
            
            for item in items:
                runs = self._inlineRunsForListItem(item)
                isNewFormat = isinstance(item, list)
                
                p = text_frame.add_paragraph()
                p.level = 0
                p.alignment = PP_ALIGN.LEFT
                p.space_before = Pt(2)
                p.space_after = Pt(2)
                
                if isNewFormat:
                    bulletRuns = [{"type": "text", "value": "  \u2022  "}] + runs
                    self._renderInlineRunsPptx(bulletRuns, p, fontSize=fontSize, fontColor=fontColor)
                else:
                    itemText = item.get("text", "") if isinstance(item, dict) else str(item)
                    if not itemText or not itemText.strip():
                        continue
                    self._addMarkdownInlineRuns(p, f"  \u2022  {itemText}", fontSize=fontSize, fontColor=fontColor, fontBold=False)
                
                # Subitems (only for dict-style items)
                if isinstance(item, dict):
                    for sub in item.get("subitems", []):
                        subRuns = self._inlineRunsForListItem(sub)
                        isSubNew = isinstance(sub, list)
                        sp = text_frame.add_paragraph()
                        sp.level = 0
                        sp.alignment = PP_ALIGN.LEFT
                        sp.space_before = Pt(1)
                        sp.space_after = Pt(1)
                        if isSubNew:
                            subBulletRuns = [{"type": "text", "value": "      \u2013  "}] + subRuns
                            self._renderInlineRunsPptx(subBulletRuns, sp, fontSize=fontSize, fontColor=fontColor)
                        else:
                            subText = sub.get("text", "") if isinstance(sub, dict) else str(sub)
                            if not subText:
                                continue
                            self._addMarkdownInlineRuns(sp, f"      \u2013  {subText}", fontSize=fontSize, fontColor=fontColor, fontBold=False)
                
        except Exception as e:
            logger.warning(f"Error adding bullet list to slide: {str(e)}")
    
    def _addHeadingToSlide(self, slide, element: Dict[str, Any], styles: Dict[str, Any], text_frame, font_size_multiplier: float = 1.0) -> None:
        """Add heading to slide text frame."""
        try:
            from pptx.util import Pt
            from pptx.dml.color import RGBColor
            
            # Extract from nested content structure
            content = element.get("content", {})
            if not isinstance(content, dict):
                return
            
            text = content.get("text", "")
            level = content.get("level", 1)
            
            if text:
                p = text_frame.add_paragraph()
                p.level = 0
                
                heading_style = styles.get("heading", {})
                if level == 1:
                    base_font_size = heading_style.get("font_size", 28)
                elif level == 2:
                    base_font_size = heading_style.get("font_size", 22)
                elif level == 3:
                    base_font_size = heading_style.get("font_size", 18)
                else:
                    base_font_size = heading_style.get("font_size", 16)
                
                calculated_size = max(12, int(base_font_size * font_size_multiplier))
                fSize = Pt(calculated_size)
                fColor = RGBColor(*self._getSafeColor(heading_style.get("color", (31, 78, 121))))
                self._addMarkdownInlineRuns(p, text, fontSize=fSize, fontColor=fColor, fontBold=True)
                # Add spacing before and after headings
                p.space_before = Pt(12 if level == 1 else 8)  # More space before H1
                p.space_after = Pt(6)  # Space after heading
                
        except Exception as e:
            logger.warning(f"Error adding heading to slide: {str(e)}")
    
    def _addParagraphToSlide(self, slide, element: Dict[str, Any], styles: Dict[str, Any], text_frame, font_size_multiplier: float = 1.0) -> None:
        """Add paragraph to slide text frame."""
        try:
            from pptx.util import Pt
            from pptx.dml.color import RGBColor
            from pptx.enum.text import PP_ALIGN
            
            # Extract from nested content structure
            content = element.get("content", {})
            if isinstance(content, dict):
                inlineRuns = self._inlineRunsFromContent(content)
                hasInlineRuns = content.get("inlineRuns") is not None
                text = content.get("text", "")
            elif isinstance(content, str):
                text = content
                inlineRuns = [{"type": "text", "value": text}] if text else []
                hasInlineRuns = False
            else:
                text = ""
                inlineRuns = []
                hasInlineRuns = False
            
            if not inlineRuns and not text:
                return
            
            p = text_frame.add_paragraph()
            p.level = 0
            
            try:
                if hasattr(p, 'paragraph_format'):
                    p.paragraph_format.bullet.type = None
            except (AttributeError, TypeError):
                pass
            
            paragraph_style = styles.get("paragraph", {})
            base_font_size = paragraph_style.get("font_size", 14)
            calculated_size = max(10, int(base_font_size * font_size_multiplier))
            fSize = Pt(calculated_size)
            fColor = RGBColor(*self._getSafeColor(paragraph_style.get("color", (47, 47, 47))))
            fBold = paragraph_style.get("bold", False)
            
            if hasInlineRuns:
                self._renderInlineRunsPptx(inlineRuns, p, fontSize=fSize, fontColor=fColor)
            else:
                self._addMarkdownInlineRuns(p, text, fontSize=fSize, fontColor=fColor, fontBold=fBold)
            
            p.space_before = Pt(6)
            p.space_after = Pt(6)
            p.line_spacing = 1.2
            
            align = paragraph_style.get("align", "left")
            if align == "center":
                p.alignment = PP_ALIGN.CENTER
            elif align == "right":
                p.alignment = PP_ALIGN.RIGHT
            else:
                p.alignment = PP_ALIGN.LEFT
                    
        except Exception as e:
            logger.warning(f"Error adding paragraph to slide: {str(e)}")
    
    def _addCodeBlockToSlide(self, slide, element: Dict[str, Any], styles: Dict[str, Any], text_frame, font_size_multiplier: float = 1.0) -> None:
        """Add code block to slide text frame."""
        try:
            from pptx.util import Pt
            from pptx.dml.color import RGBColor
            
            # Extract from nested content structure
            content = element.get("content", {})
            if not isinstance(content, dict):
                return
            
            code = content.get("code", "")
            language = content.get("language", "")
            
            if code:
                code_style = styles.get("code_block", {})
                code_font = code_style.get("font", "Courier New")
                base_code_font_size = code_style.get("font_size", 9)
                code_font_size = max(6, int(base_code_font_size * font_size_multiplier))  # Minimum 6pt for code
                code_color = self._getSafeColor(code_style.get("color", (47, 47, 47)))
                
                p = text_frame.add_paragraph()
                if language:
                    p.text = f"Code ({language}):"
                    p.font.bold = True
                    p.font.size = Pt(code_font_size)
                    p = text_frame.add_paragraph()
                
                p.text = code
                p.font.name = code_font
                p.font.size = Pt(code_font_size)
                p.font.color.rgb = RGBColor(*code_color)
                
        except Exception as e:
            logger.warning(f"Error adding code block to slide: {str(e)}")
    
    def _formatTimestamp(self) -> str:
        """Format current timestamp for presentation generation."""
        # datetime and UTC are already imported at module level
        return datetime.now(UTC).strftime("%Y-%m-%d %H:%M:%S UTC")
    
    def _renderSlideContentWithFrames(self, slide, slide_sections: List[Dict[str, Any]], slide_images: List[Dict[str, Any]], styles: Dict[str, Any], prs) -> None:
        """Render all sections sequentially: text/bullets/headings into a shared
        textbox, tables and images as separate shapes placed below."""
        try:
            from pptx.util import Inches, Pt

            margin = Inches(0.5)
            contentTop = Inches(1.3)
            availableWidth = prs.slide_width - Inches(1)
            availableHeight = prs.slide_height - contentTop - Inches(0.3)

            # Create a single textbox for all non-table, non-image content
            textbox = slide.shapes.add_textbox(margin, contentTop, availableWidth, availableHeight)
            textFrame = textbox.text_frame
            textFrame.word_wrap = True
            textFrame.auto_size = None

            for section in slide_sections:
                self._renderSectionToTextFrame(slide, section, styles, textFrame, font_size_multiplier=1.0)

            # Render standalone images that were passed alongside sections
            if slide_images:
                self._addImagesToSlideInFrame(slide, slide_images, styles, margin, contentTop, availableWidth, availableHeight)

        except Exception as e:
            logger.error(f"Error rendering slide content: {str(e)}")
    
    def _renderTextSectionsInFrame(self, slide, text_sections: List[Dict[str, Any]], styles: Dict[str, Any], left: float, top: float, width: float, height: float, adaptiveFontSize: bool = False) -> None:
        """Render text sections (paragraphs, lists, headings) in a text frame."""
        try:
            from pptx.util import Inches, Pt
            from pptx.enum.text import PP_ALIGN
            from pptx.dml.color import RGBColor
            
            # Calculate total text length for adaptive font sizing
            total_text_length = 0
            if adaptiveFontSize:
                for section in text_sections:
                    elements = section.get("elements", [])
                    for element in elements:
                        if isinstance(element, dict):
                            element_type = element.get("type", "")
                            if element_type in ["paragraph", "bullet_list", "list", "heading"]:
                                content = element.get("content", "")
                                if isinstance(content, dict):
                                    if "text" in content:
                                        total_text_length += len(str(content["text"]))
                                    elif "items" in content:
                                        for item in content.get("items", []):
                                            total_text_length += len(str(item))
                                elif isinstance(content, str):
                                    total_text_length += len(content)
            
            # Calculate adaptive font size multiplier based on text length and frame size
            font_size_multiplier = 1.0
            if adaptiveFontSize and total_text_length > 0:
                try:
                    # More accurate calculation: estimate characters per line based on average character width
                    # Average character width is approximately 0.6 * font_size in points
                    # For 14pt font, average char width ≈ 8.4pt
                    avg_char_width_pt = 8.4  # Approximate for 14pt font
                    chars_per_line = max(1, int(float(width) / avg_char_width_pt))
                    
                    # Estimate lines needed
                    lines_needed = total_text_length / max(chars_per_line, 1)
                    
                    # Available lines based on height (line height ≈ 1.2 * font_size)
                    line_height_pt = 16.8  # Approximate for 14pt font with 1.2 spacing
                    available_lines = max(1, int(float(height) / line_height_pt))
                    
                    if available_lines > 0 and lines_needed > available_lines:
                        # More aggressive scaling for long texts
                        # Calculate exact scale needed, then add 10% buffer
                        scale_needed = available_lines / lines_needed
                        font_size_multiplier = scale_needed * 0.9  # 10% buffer
                        # Allow scaling down to 50% for very long texts (minimum readable)
                        font_size_multiplier = max(0.5, min(1.0, font_size_multiplier))
                    elif lines_needed <= available_lines * 0.7:
                        # If text is much shorter than available space, can use slightly larger font
                        font_size_multiplier = min(1.1, (available_lines / lines_needed) * 0.8)
                except (ZeroDivisionError, ValueError, TypeError) as calc_error:
                    logger.debug(f"Font size calculation error: {str(calc_error)}")
                    # Fallback to default if calculation fails
                    font_size_multiplier = 1.0
            
            textbox = slide.shapes.add_textbox(left, top, width, height)
            text_frame = textbox.text_frame
            text_frame.word_wrap = True
            text_frame.auto_size = None  # Disable auto-size for fixed frame
            # Ensure text frame can display bullets
            text_frame.margin_left = Pt(0)
            text_frame.margin_right = Pt(0)
            text_frame.margin_top = Pt(0)
            text_frame.margin_bottom = Pt(0)
            
            # Pass font size multiplier to rendering methods
            for section in text_sections:
                self._renderSectionToTextFrame(slide, section, styles, text_frame, font_size_multiplier)
                
        except Exception as e:
            logger.warning(f"Error rendering text sections in frame: {str(e)}")
    
    @staticmethod
    def _isHorizontalRule(element: Dict[str, Any]) -> bool:
        """Detect markdown horizontal rules (---, ***, ___) that should be skipped on slides."""
        content = element.get("content", {})
        text = content.get("text", "") if isinstance(content, dict) else (content if isinstance(content, str) else "")
        stripped = text.strip()
        return bool(stripped) and all(c in "-*_ " for c in stripped) and len(stripped.replace(" ", "")) >= 3

    def _renderSectionToTextFrame(self, slide, section: Dict[str, Any], styles: Dict[str, Any], text_frame, font_size_multiplier: float = 1.0) -> None:
        """Render a single section to a text frame."""
        try:
            from pptx.util import Pt
            from pptx.enum.text import PP_ALIGN
            from pptx.dml.color import RGBColor
            
            sectionType = section.get("content_type", "paragraph")
            elements = section.get("elements", [])
            
            if not elements:
                return
            
            for element in elements:
                if not isinstance(element, dict):
                    continue
                
                elementType = element.get("type", "") or sectionType

                if elementType == "image":
                    continue

                # Skip horizontal rules (---, ***, ___)
                if elementType == "paragraph" and self._isHorizontalRule(element):
                    continue
                
                if elementType == "table":
                    self._addTableToSlide(slide, element, styles)
                elif elementType in ("bullet_list", "list"):
                    self._addBulletListToSlide(slide, element, styles, text_frame, font_size_multiplier)
                elif elementType == "heading":
                    self._addHeadingToSlide(slide, element, styles, text_frame, font_size_multiplier)
                elif elementType == "paragraph":
                    self._addParagraphToSlide(slide, element, styles, text_frame, font_size_multiplier)
                elif elementType in ("code_block", "code"):
                    self._addCodeBlockToSlide(slide, element, styles, text_frame, font_size_multiplier)
                elif elementType == "extracted_text":
                    content = element.get("content", "")
                    if content:
                        p = text_frame.add_paragraph()
                        pStyle = styles.get("paragraph", {})
                        fSize = Pt(max(10, int(pStyle.get("font_size", 14) * font_size_multiplier)))
                        fColor = RGBColor(*self._getSafeColor(pStyle.get("color", (47, 47, 47))))
                        self._addMarkdownInlineRuns(p, content, fontSize=fSize, fontColor=fColor)
                        p.alignment = PP_ALIGN.LEFT
                elif elementType == "reference":
                    label = element.get("label", "Reference")
                    p = text_frame.add_paragraph()
                    p.text = f"[Reference: {label}]"
                    p.font.italic = True
                    p.alignment = PP_ALIGN.LEFT
                else:
                    self._addParagraphToSlide(slide, element, styles, text_frame, font_size_multiplier)
                        
        except Exception as e:
            logger.warning(f"Error rendering section to text frame: {str(e)}")
    
    def _addImagesToSlideInFrame(self, slide, images: List[Dict[str, Any]], styles: Dict[str, Any], left: float, top: float, width: float, height: float) -> None:
        """Add images to slide within a specific frame area."""
        try:
            from pptx.util import Inches, Pt
            from pptx.enum.text import PP_ALIGN
            import base64
            import io
            
            if not images:
                logger.debug("No images to render in frame")
                return
            
            logger.info(f"Rendering {len(images)} image(s) in frame at ({left}, {top}), size ({width}, {height})")
            
            # Calculate image dimensions within frame
            if len(images) == 1:
                # Single image: fit to frame
                img = images[0]
                base64Data = img.get("base64Data")
                
                if not base64Data:
                    logger.warning("Image has no base64Data")
                    return
                
                # Clean base64 data (remove data URI prefix if present)
                if isinstance(base64Data, str):
                    if base64Data.startswith("data:image/"):
                        # Extract base64 from data URI
                        base64Data = base64Data.split(",", 1)[1]
                    # Remove any whitespace
                    base64Data = base64Data.strip()
                
                try:
                    # Decode base64
                    imageBytes = base64.b64decode(base64Data, validate=True)
                    if len(imageBytes) == 0:
                        logger.error("Decoded image bytes are empty")
                        return
                    
                    imageStream = io.BytesIO(imageBytes)
                    
                    # Get image dimensions using PIL
                    imgWidth, imgHeight = None, None
                    try:
                        from PIL import Image as PILImage
                        pilImage = PILImage.open(imageStream)
                        imgWidth, imgHeight = pilImage.size
                        imageStream.seek(0)  # Reset stream for PowerPoint
                        
                        # Validate image dimensions - ensure they're reasonable
                        if imgWidth <= 1 or imgHeight <= 1:
                            logger.warning(f"Image has invalid dimensions: {imgWidth}x{imgHeight}, using default size")
                            imgWidth, imgHeight = 800, 600
                            imageStream.seek(0)
                        elif imgWidth < 100 or imgHeight < 100:
                            logger.warning(f"Image dimensions very small: {imgWidth}x{imgHeight}, may appear tiny")
                    except ImportError:
                        logger.warning("PIL not available, using default image size")
                        imgWidth, imgHeight = 800, 600  # Default dimensions
                    except Exception as pil_error:
                        logger.warning(f"Error getting image dimensions with PIL: {str(pil_error)}, using default size")
                        imgWidth, imgHeight = 800, 600
                        imageStream.seek(0)
                    
                    # Ensure we have valid dimensions
                    if not imgWidth or not imgHeight or imgWidth <= 1 or imgHeight <= 1:
                        logger.warning("Invalid image dimensions, using default 800x600")
                        imgWidth, imgHeight = 800, 600
                    
                    # Scale to fit frame while maintaining aspect ratio
                    # width and height parameters are already in Inches (from pptx.util.Inches)
                    # Convert PIL pixel dimensions to Inches (assuming 96 DPI for PIL images)
                    imgWidthInches = Inches(imgWidth / 96.0)
                    imgHeightInches = Inches(imgHeight / 96.0)
                    
                    # Calculate scale to fit within frame
                    # Inches objects support division, result is a float
                    try:
                        scale_width = width / imgWidthInches if imgWidthInches > 0 else 1.0
                        scale_height = height / imgHeightInches if imgHeightInches > 0 else 1.0
                        scale = min(scale_width, scale_height, 1.0)  # Don't scale up, only down
                        
                        finalWidth = imgWidthInches * scale
                        finalHeight = imgHeightInches * scale
                        
                        # Ensure minimum size (at least 1 inch) to prevent tiny rendering
                        minSize = Inches(1)
                        if finalWidth < minSize or finalHeight < minSize:
                            # Use minimum size while maintaining aspect ratio
                            min_scale = max(minSize / imgWidthInches if imgWidthInches > 0 else 1.0,
                                          minSize / imgHeightInches if imgHeightInches > 0 else 1.0)
                            finalWidth = max(minSize, imgWidthInches * min_scale)
                            finalHeight = max(minSize, imgHeightInches * min_scale)
                        
                        # Ensure we don't exceed frame bounds
                        if finalWidth > width:
                            finalWidth = width
                            finalHeight = imgHeightInches * (width / imgWidthInches) if imgWidthInches > 0 else finalHeight
                        if finalHeight > height:
                            finalHeight = height
                            finalWidth = imgWidthInches * (height / imgHeightInches) if imgHeightInches > 0 else finalWidth
                    except (ZeroDivisionError, TypeError, AttributeError) as calc_error:
                        logger.warning(f"Error calculating image size: {str(calc_error)}, using frame size")
                        finalWidth = width * 0.9  # Use 90% of frame width
                        finalHeight = height * 0.9  # Use 90% of frame height
                    
                    # Center in frame
                    frame_left = left + (width - finalWidth) / 2
                    frame_top = top + (height - finalHeight) / 2
                    
                    # Add image to slide
                    imageStream.seek(0)
                    slide.shapes.add_picture(imageStream, frame_left, frame_top, width=finalWidth, height=finalHeight)
                    logger.info(f"Successfully added image to slide at ({frame_left}, {frame_top}), size ({finalWidth}, {finalHeight})")
                    
                    # Add caption if available
                    caption = img.get("caption") or img.get("altText")
                    if caption and caption != "Image":
                        captionTop = frame_top + finalHeight + Inches(0.1)
                        captionBox = slide.shapes.add_textbox(left, captionTop, width, Inches(0.4))
                        captionFrame = captionBox.text_frame
                        captionFrame.text = caption
                        captionFrame.paragraphs[0].font.size = Pt(10)
                        captionFrame.paragraphs[0].font.italic = True
                        captionFrame.paragraphs[0].alignment = PP_ALIGN.CENTER
                except base64.binascii.Error as b64_error:
                    logger.error(f"Invalid base64 data: {str(b64_error)}")
                except Exception as img_error:
                    logger.error(f"Error adding image to frame: {str(img_error)}", exc_info=True)
            else:
                # Multiple images: grid layout
                cols = 2 if len(images) <= 4 else 3
                rows = (len(images) + cols - 1) // cols
                imgWidth = (width - Inches(0.2) * (cols - 1)) / cols
                imgHeight = (height - Inches(0.2) * (rows - 1)) / rows
                
                for idx, img in enumerate(images):
                    base64Data = img.get("base64Data")
                    if not base64Data:
                        logger.warning(f"Image {idx} has no base64Data")
                        continue
                    
                    # Clean base64 data
                    if isinstance(base64Data, str):
                        if base64Data.startswith("data:image/"):
                            base64Data = base64Data.split(",", 1)[1]
                        base64Data = base64Data.strip().replace("\n", "").replace("\r", "").replace("\t", "").replace(" ", "")
                    
                    row = idx // cols
                    col = idx % cols
                    img_left = left + col * (imgWidth + Inches(0.2))
                    img_top = top + row * (imgHeight + Inches(0.2))
                    
                    try:
                        imageBytes = base64.b64decode(base64Data, validate=True)
                        if len(imageBytes) == 0:
                            logger.error(f"Decoded image {idx} bytes are empty")
                            continue
                        
                        imageStream = io.BytesIO(imageBytes)
                        
                        # Try to get dimensions for better scaling
                        try:
                            from PIL import Image as PILImage
                            pilImage = PILImage.open(imageStream)
                            imgW, imgH = pilImage.size
                            # Scale to fit grid cell while maintaining aspect ratio
                            scale = min(imgWidth / (imgW * (72.0 / 96.0)), imgHeight / (imgH * (72.0 / 96.0)), 1.0)
                            finalW = (imgW * (72.0 / 96.0)) * scale
                            finalH = (imgH * (72.0 / 96.0)) * scale
                            # Center in grid cell
                            cell_left = img_left + (imgWidth - finalW) / 2
                            cell_top = img_top + (imgHeight - finalH) / 2
                            imageStream.seek(0)
                            slide.shapes.add_picture(imageStream, cell_left, cell_top, width=finalW, height=finalH)
                        except (ImportError, Exception):
                            # Fallback: use grid cell size directly
                            imageStream.seek(0)
                            slide.shapes.add_picture(imageStream, img_left, img_top, width=imgWidth, height=imgHeight)
                        
                        logger.info(f"Successfully added image {idx+1}/{len(images)} to slide grid")
                    except base64.binascii.Error as b64_error:
                        logger.error(f"Invalid base64 data for image {idx}: {str(b64_error)}")
                    except Exception as img_error:
                        logger.error(f"Error adding image {idx} to frame: {str(img_error)}", exc_info=True)
                            
        except Exception as e:
            logger.error(f"Error adding images to slide frame: {str(e)}", exc_info=True)