"""
Onboarding Completion Service
Handles the complex logic for completing the onboarding process.
"""

from typing import Dict, Any, List
from fastapi import HTTPException
from loguru import logger

from services.api_key_manager import get_onboarding_progress_for_user, get_api_key_manager, StepStatus
from services.persona_analysis_service import PersonaAnalysisService

class OnboardingCompletionService:
    """Service for handling onboarding completion logic."""
    
    def __init__(self):
        self.required_steps = [1, 2, 3, 6]  # Steps 1, 2, 3, and 6 are required
    
    async def complete_onboarding(self, current_user: Dict[str, Any]) -> Dict[str, Any]:
        """Complete the onboarding process with full validation."""
        try:
            user_id = str(current_user.get('id'))
            progress = get_onboarding_progress_for_user(user_id)
            
            # Validate required steps are completed
            missing_steps = self._validate_required_steps(progress)
            if missing_steps:
                missing_steps_str = ", ".join(missing_steps)
                raise HTTPException(
                    status_code=400, 
                    detail=f"Cannot complete onboarding. The following steps must be completed first: {missing_steps_str}"
                )
            
            # Validate API keys are configured
            self._validate_api_keys()
            
            # Generate writing persona from onboarding data
            persona_generated = await self._generate_persona_from_onboarding(user_id)
            
            # Complete the onboarding process
            progress.complete_onboarding()
            
            return {
                "message": "Onboarding completed successfully",
                "completed_at": progress.completed_at,
                "completion_percentage": 100.0,
                "persona_generated": persona_generated
            }
            
        except HTTPException:
            raise
        except Exception as e:
            logger.error(f"Error completing onboarding: {str(e)}")
            raise HTTPException(status_code=500, detail="Internal server error")
    
    def _validate_required_steps(self, progress) -> List[str]:
        """Validate that all required steps are completed."""
        missing_steps = []
        
        for step_num in self.required_steps:
            step = progress.get_step_data(step_num)
            if step and step.status not in [StepStatus.COMPLETED, StepStatus.SKIPPED]:
                missing_steps.append(step.title)
        
        return missing_steps
    
    def _validate_api_keys(self):
        """Validate that API keys are configured."""
        api_manager = get_api_key_manager()
        api_keys = api_manager.get_all_keys()
        if not api_keys:
            raise HTTPException(
                status_code=400,
                detail="Cannot complete onboarding. At least one AI provider API key must be configured."
            )
    
    async def _generate_persona_from_onboarding(self, user_id: str) -> bool:
        """Generate writing persona from onboarding data."""
        try:
            persona_service = PersonaAnalysisService()
            
            # Use user_id = 1 for now (assuming single user system)
            persona_user_id = 1
            persona_result = persona_service.generate_persona_from_onboarding(persona_user_id)
            
            if "error" not in persona_result:
                logger.info(f"✅ Writing persona generated during onboarding completion: {persona_result.get('persona_id')}")
                return True
            else:
                logger.warning(f"⚠️ Persona generation failed during onboarding: {persona_result['error']}")
                return False
        except Exception as e:
            logger.warning(f"⚠️ Non-critical error generating persona during onboarding: {str(e)}")
            return False