# Copyright (c) 2025 Patrick Motsch
# All rights reserved.
"""
Content Integrator for hierarchical document generation.
Merges generated content into document structure and validates completeness.
"""

import logging
from typing import Dict, Any, List, Tuple

logger = logging.getLogger(__name__)


class ContentIntegrator:
    """Integrates generated content into document structure"""
    
    def __init__(self, services: Any = None):
        self.services = services
    
    def integrateContent(
        self,
        structure: Dict[str, Any],
        generatedSections: List[Dict[str, Any]]
    ) -> Dict[str, Any]:
        """
        Merge generated sections into document structure.
        
        Args:
            structure: Original document structure
            generatedSections: List of sections with populated elements
            
        Returns:
            Complete document structure ready for rendering
        """
        try:
            # Create mapping of section IDs to generated sections
            sectionMap = {section.get("id"): section for section in generatedSections}
            
            # Process each document
            for doc in structure.get("documents", []):
                sections = doc.get("sections", [])
                
                for idx, section in enumerate(sections):
                    sectionId = section.get("id")
                    
                    # Find corresponding generated section
                    if sectionId in sectionMap:
                        generatedSection = sectionMap[sectionId]
                        
                        # Merge elements into structure section
                        if "elements" in generatedSection:
                            section["elements"] = generatedSection["elements"]
                        
                        # Preserve error information if present
                        if generatedSection.get("error"):
                            section["error"] = True
                            section["errorMessage"] = generatedSection.get("errorMessage")
                            section["originalContentType"] = generatedSection.get("originalContentType")
                    else:
                        # Section not generated - create error section
                        logger.warning(f"Section {sectionId} not found in generated sections")
                        section = self.createErrorSection(
                            section,
                            f"Section {sectionId} was not generated"
                        )
                        sections[idx] = section
            
            # Debug: Write final merged structure to debug file (harmonisiert - keine Checks nötig)
            import json
            structureJson = json.dumps(structure, indent=2, ensure_ascii=False)
            self.services.utils.writeDebugFile(
                structureJson,
                "document_generation_final_merged_json"
            )
            logger.debug(f"Logged final merged JSON structure ({len(structureJson)} chars)")
            
            return structure
            
        except Exception as e:
            logger.error(f"Error integrating content: {str(e)}")
            raise
    
    def validateCompleteness(
        self,
        document: Dict[str, Any]
    ) -> Tuple[bool, List[str]]:
        """
        Validate that all sections have content.
        
        Args:
            document: Document structure to validate
            
        Returns:
            (is_complete, list_of_missing_sections)
        """
        missingSections = []
        
        try:
            for doc in document.get("documents", []):
                sections = doc.get("sections", [])
                
                for section in sections:
                    sectionId = section.get("id", "unknown")
                    elements = section.get("elements", [])
                    
                    # Check if section has content
                    if not elements or len(elements) == 0:
                        # Skip error sections (they have error text)
                        if not section.get("error"):
                            missingSections.append(sectionId)
                    else:
                        # Validate elements have actual content
                        hasContent = False
                        for element in elements:
                            # Check different content types
                            if element.get("text") or element.get("base64Data") or \
                               element.get("headers") or element.get("items") or \
                               element.get("code"):
                                hasContent = True
                                break
                        
                        if not hasContent and not section.get("error"):
                            missingSections.append(sectionId)
            
            return len(missingSections) == 0, missingSections
            
        except Exception as e:
            logger.error(f"Error validating completeness: {str(e)}")
            return False, [f"Validation error: {str(e)}"]
    
    def createErrorSection(
        self,
        originalSection: Dict[str, Any],
        errorMessage: str
    ) -> Dict[str, Any]:
        """
        Create error placeholder section.
        
        Args:
            originalSection: Original section that failed
            errorMessage: Error message to display
            
        Returns:
            Error section with placeholder content
        """
        contentType = originalSection.get("content_type", "content")
        sectionId = originalSection.get("id", "unknown")
        
        return {
            "id": sectionId,
            "content_type": "paragraph",  # Change to paragraph for error display
            "elements": [{
                "text": f"[ERROR: Failed to generate {contentType} for section '{sectionId}'. Error: {errorMessage}]"
            }],
            "order": originalSection.get("order", 0),
            "error": True,
            "errorMessage": errorMessage,
            "originalContentType": contentType,
            "title": originalSection.get("title"),
            "generation_hint": originalSection.get("generation_hint"),
            "complexity": originalSection.get("complexity")
        }