# Copyright (c) 2025 Patrick Motsch
# All rights reserved.

import logging
import time
from typing import Dict, Any, Optional, List
from modules.datamodels.datamodelChat import ActionResult, ActionDocument
from modules.datamodels.datamodelExtraction import ContentPart
from modules.datamodels.datamodelAi import AiCallOptions, OperationTypeEnum, PriorityEnum, ProcessingModeEnum
from modules.datamodels.datamodelWorkflow import AiResponse, DocumentData
from modules.serviceCenter.services.serviceSubscription.mainServiceSubscription import SubscriptionInactiveException
from modules.serviceCenter.services.serviceBilling.mainServiceBilling import BillingContextError

logger = logging.getLogger(__name__)

async def generateDocument(self, parameters: Dict[str, Any]) -> ActionResult:
    from modules.workflows.methods.methodAi._common import serialize_context
    base_prompt = (parameters.get("prompt") or "").strip()
    context_val = serialize_context(parameters.get("context"))
    prompt = f"Kontext:\n{context_val}\n\n{base_prompt}" if context_val else base_prompt
    if not prompt.strip():
        return ActionResult.isFailure(error="prompt is required")
    
    documentList = parameters.get("documentList", [])
    documentType = parameters.get("documentType")
    # Prefer explicit outputFormat (flow UI); resultType remains for legacy / API callers.
    resultType = parameters.get("outputFormat") or parameters.get("resultType")
    if isinstance(resultType, str):
        resultType = resultType.strip().lstrip(".").lower() or None
    
    if not resultType:
        logger.debug("resultType not provided - formats will be determined from prompt by AI")
    
    # Create operation ID for progress tracking
    workflowId = self.services.workflow.id if self.services.workflow else f"no-workflow-{int(time.time())}"
    operationId = f"doc_gen_{workflowId}_{int(time.time())}"
    parentOperationId = parameters.get('parentOperationId')
    
    try:
        # Convert documentList to DocumentReferenceList if needed
        docRefList = None
        if documentList:
            from modules.datamodels.datamodelDocref import DocumentReferenceList
            
            if isinstance(documentList, DocumentReferenceList):
                docRefList = documentList
            elif isinstance(documentList, str):
                docRefList = DocumentReferenceList.from_string_list([documentList])
            elif isinstance(documentList, list):
                docRefList = DocumentReferenceList.from_string_list(documentList)
            else:
                docRefList = DocumentReferenceList(references=[])
        
        title_raw = parameters.get("title")
        title = (title_raw.strip() if isinstance(title_raw, str) else "") or None
        if not title and isinstance(documentType, str) and documentType.strip():
            title = documentType.strip()
        if not title:
            title = "Generated Document"
        
        # Call AI service for document generation
        # callAiContent handles documentList internally via Phases 5A-5E
        options = AiCallOptions(
            operationType=OperationTypeEnum.DATA_GENERATE,
            priority=PriorityEnum.BALANCED,
            processingMode=ProcessingModeEnum.DETAILED,
            compressPrompt=False,
            compressContext=False
        )
        
        # Apply node-level AI params
        allowedModels = parameters.get("allowedModels")
        if allowedModels and isinstance(allowedModels, list):
            options.allowedModels = allowedModels
        requireNeutralization = parameters.get("requireNeutralization")
        if requireNeutralization is not None:
            _ctx = getattr(self.services, '_context', None)
            if _ctx:
                _ctx.requireNeutralization = bool(requireNeutralization)
        
        # outputFormat: Optional - if None, formats determined from prompt by AI
        aiResponse: AiResponse = await self.services.ai.callAiContent(
            prompt=prompt,
            options=options,
            documentList=docRefList,  # Übergebe documentList direkt - callAiContent macht Phasen 5A-5E
            outputFormat=resultType,  # Can be None - AI determines from prompt
            title=title,
            parentOperationId=parentOperationId,
            generationIntent="document"  # NEW: Explicit intent, skips detection
        )
        
        # Convert AiResponse to ActionResult
        documents = []
        
        # Convert DocumentData to ActionDocument
        if aiResponse.documents:
            for docData in aiResponse.documents:
                documents.append(ActionDocument(
                    documentName=docData.documentName,
                    documentData=docData.documentData,
                    mimeType=docData.mimeType,
                    sourceJson=docData.sourceJson if hasattr(docData, 'sourceJson') else None,
                    validationMetadata={
                        "actionType": "ai.generateDocument",
                        "documentType": documentType,
                        "resultType": resultType,
                        "outputFormat": resultType,
                        "title": title,
                    }
                ))
        
        # If no documents but content exists, create a document from content
        if not documents and aiResponse.content:
            # Determine document name from metadata
            resultTypeFallback = resultType or "txt"  # Fallback for file naming
            docName = f"document.{resultTypeFallback}"
            if aiResponse.metadata and aiResponse.metadata.filename:
                docName = aiResponse.metadata.filename
            elif aiResponse.metadata and aiResponse.metadata.title:
                import re
                sanitized = re.sub(r"[^a-zA-Z0-9._-]", "_", aiResponse.metadata.title)
                sanitized = re.sub(r"_+", "_", sanitized).strip("_")
                if sanitized:
                    if not sanitized.lower().endswith(f".{resultTypeFallback}"):
                        docName = f"{sanitized}.{resultTypeFallback}"
                    else:
                        docName = sanitized
            
            # Determine mime type
            rt = resultTypeFallback
            mimeType = "text/plain"
            if rt == "html":
                mimeType = "text/html"
            elif rt == "json":
                mimeType = "application/json"
            elif rt == "pdf":
                mimeType = "application/pdf"
            elif rt == "md":
                mimeType = "text/markdown"
            
            documents.append(ActionDocument(
                documentName=docName,
                documentData=aiResponse.content.encode('utf-8') if isinstance(aiResponse.content, str) else aiResponse.content,
                mimeType=mimeType,
                validationMetadata={
                    "actionType": "ai.generateDocument",
                    "documentType": documentType,
                    "resultType": resultType,
                    "outputFormat": resultType,
                    "title": title,
                }
            ))
        
        return ActionResult.isSuccess(documents=documents)
        
    except (SubscriptionInactiveException, BillingContextError):
        raise
    except Exception as e:
        logger.error(f"Error in document generation: {str(e)}")
        return ActionResult.isFailure(error=str(e))