"""
FastAPI routes for persona management.
Integrates persona generation and management into the main API.
"""

from fastapi import APIRouter, HTTPException, Query, Depends
from typing import Dict, Any, Optional
from sqlalchemy.orm import Session
from middleware.auth_middleware import get_current_user
from services.database import get_db

from api.persona import (
    generate_persona,
    get_user_personas,
    get_persona_details,
    get_platform_persona,
    get_persona_summary,
    update_persona,
    delete_persona,
    validate_persona_generation_readiness,
    generate_persona_preview,
    get_supported_platforms,
    validate_linkedin_persona,
    optimize_linkedin_persona,
    validate_facebook_persona,
    optimize_facebook_persona,
    PersonaGenerationRequest,
    LinkedInPersonaValidationRequest,
    LinkedInPersonaValidationResponse,
    LinkedInOptimizationRequest,
    LinkedInOptimizationResponse,
    FacebookPersonaValidationRequest,
    FacebookPersonaValidationResponse,
    FacebookOptimizationRequest,
    FacebookOptimizationResponse
)

from services.persona_replication_engine import PersonaReplicationEngine
from api.persona import update_platform_persona, generate_platform_persona, check_facebook_persona

# Create router
router = APIRouter(prefix="/api/personas", tags=["personas"])

@router.post("/generate")
async def generate_persona_endpoint(
    request: PersonaGenerationRequest,
    user_id: int = Query(1, description="User ID")
):
    """Generate a new writing persona from onboarding data."""
    return await generate_persona(user_id, request)

@router.get("/user")
async def get_user_personas_endpoint(current_user: Dict[str, Any] = Depends(get_current_user)):
    """Get all personas for the current user."""
    user_id = str(current_user.get('id'))
    return await get_user_personas(user_id)

@router.get("/summary")
async def get_persona_summary_endpoint(current_user: Dict[str, Any] = Depends(get_current_user)):
    """Get persona summary for the current user."""
    user_id = str(current_user.get('id'))
    return await get_persona_summary(user_id)

@router.get("/{persona_id}")
async def get_persona_details_endpoint(
    persona_id: int,
    current_user: Dict[str, Any] = Depends(get_current_user)
):
    """Get detailed information about a specific persona."""
    user_id = str(current_user.get('id'))
    return await get_persona_details(user_id, persona_id)

@router.get("/platform/{platform}")
async def get_platform_persona_endpoint(
    platform: str,
    current_user: Dict[str, Any] = Depends(get_current_user)
):
    """Get persona adaptation for a specific platform."""
    user_id = str(current_user.get('id'))
    return await get_platform_persona(user_id, platform)

@router.post("/generate-platform/{platform}")
async def generate_platform_persona_endpoint(
    platform: str,
    current_user: Dict[str, Any] = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Generate a platform-specific persona from core persona."""
    user_id = str(current_user.get('id'))
    return await generate_platform_persona(user_id, platform, db)

@router.put("/{persona_id}")
async def update_persona_endpoint(
    persona_id: int,
    update_data: Dict[str, Any],
    user_id: int = Query(..., description="User ID")
):
    """Update an existing persona."""
    # Beta testing: Force user_id=1 for all requests
    return await update_persona(1, persona_id, update_data)

@router.delete("/{persona_id}")
async def delete_persona_endpoint(
    persona_id: int,
    user_id: int = Query(..., description="User ID")
):
    """Delete a persona."""
    # Beta testing: Force user_id=1 for all requests
    return await delete_persona(1, persona_id)

@router.get("/check/readiness")
async def check_persona_readiness_endpoint(
    user_id: int = Query(1, description="User ID")
):
    """Check if user has sufficient data for persona generation."""
    # Beta testing: Force user_id=1 for all requests
    return await validate_persona_generation_readiness(1)

@router.get("/preview/generate")
async def generate_preview_endpoint(
    user_id: int = Query(1, description="User ID")
):
    """Generate a preview of the writing persona without saving."""
    # Beta testing: Force user_id=1 for all requests
    return await generate_persona_preview(1)

@router.get("/platforms/supported")
async def get_supported_platforms_endpoint():
    """Get list of supported platforms for persona generation."""
    return await get_supported_platforms()

@router.post("/linkedin/validate", response_model=LinkedInPersonaValidationResponse)
async def validate_linkedin_persona_endpoint(
    request: LinkedInPersonaValidationRequest
):
    """Validate LinkedIn persona data for completeness and quality."""
    return await validate_linkedin_persona(request)

@router.post("/linkedin/optimize", response_model=LinkedInOptimizationResponse)
async def optimize_linkedin_persona_endpoint(
    request: LinkedInOptimizationRequest
):
    """Optimize LinkedIn persona data for maximum algorithm performance."""
    return await optimize_linkedin_persona(request)

@router.post("/facebook/validate", response_model=FacebookPersonaValidationResponse)
async def validate_facebook_persona_endpoint(
    request: FacebookPersonaValidationRequest
):
    """Validate Facebook persona data for completeness and quality."""
    return await validate_facebook_persona(request)

@router.post("/facebook/optimize", response_model=FacebookOptimizationResponse)
async def optimize_facebook_persona_endpoint(
    request: FacebookOptimizationRequest
):
    """Optimize Facebook persona data for maximum algorithm performance."""
    return await optimize_facebook_persona(request)

@router.post("/generate-content")
async def generate_content_with_persona_endpoint(
    request: Dict[str, Any]
):
    """Generate content using persona replication engine."""
    try:
        # Beta testing: Force user_id=1 for all requests
        user_id = 1
        platform = request.get("platform")
        content_request = request.get("content_request")
        content_type = request.get("content_type", "post")
        
        if not platform or not content_request:
            raise HTTPException(status_code=400, detail="Platform and content_request are required")
        
        engine = PersonaReplicationEngine()
        result = engine.generate_content_with_persona(
            user_id=user_id,
            platform=platform,
            content_request=content_request,
            content_type=content_type
        )
        
        return result
        
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Content generation failed: {str(e)}")

@router.get("/export/{platform}")
async def export_persona_prompt_endpoint(
    platform: str,
    user_id: int = Query(1, description="User ID")
):
    """Export hardened persona prompt for external use."""
    try:
        engine = PersonaReplicationEngine()
        # Beta testing: Force user_id=1 for all requests
        export_package = engine.export_persona_for_external_use(1, platform)
        
        if "error" in export_package:
            raise HTTPException(status_code=400, detail=export_package["error"])
        
        return export_package
        
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Export failed: {str(e)}")

@router.post("/validate-content")
async def validate_content_endpoint(
    request: Dict[str, Any]
):
    """Validate content against persona constraints."""
    try:
        # Beta testing: Force user_id=1 for all requests
        user_id = 1
        platform = request.get("platform")
        content = request.get("content")
        
        if not platform or not content:
            raise HTTPException(status_code=400, detail="Platform and content are required")
        
        engine = PersonaReplicationEngine()
        persona_data = engine.persona_service.get_persona_for_platform(user_id, platform)
        
        if not persona_data:
            raise HTTPException(status_code=404, detail="No persona found for platform")
        
        validation_result = engine._validate_content_fidelity(content, persona_data, platform)
        
        return {
            "validation_result": validation_result,
            "persona_id": persona_data["core_persona"]["id"],
            "platform": platform
        }
        
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Validation failed: {str(e)}")

@router.put("/platform/{platform}")
async def update_platform_persona_endpoint(
    platform: str,
    update_data: Dict[str, Any],
    user_id: int = Query(1, description="User ID")
):
    """Update platform-specific persona fields for a user.

    Allows editing persona fields in the UI and saving them to the database.
    """
    # Beta testing: Force user_id=1 for all requests
    return await update_platform_persona(1, platform, update_data)

@router.get("/facebook-persona/check/{user_id}")
async def check_facebook_persona_endpoint(
    user_id: str,
    db: Session = Depends(get_db)
):
    """Check if Facebook persona exists for user."""
    return await check_facebook_persona(user_id, db)