"""Card synchronization service for atproto"""
from typing import List, Dict, Any, Optional
from datetime import datetime
from sqlalchemy.ext.asyncio import AsyncSession

from app.services.atproto import AtprotoService, CardLexicon
from app.repositories.card import CardRepository
from app.repositories.user import UserRepository
from app.models.card import Card as CardModel
from app.db.models import UserCard
from app.core.config import settings


class CardSyncService:
    """Service for syncing cards between database and atproto PDS"""
    
    def __init__(self, session: AsyncSession, atproto_session: Optional[str] = None):
        self.db_session = session
        self.card_repo = CardRepository(session)
        self.user_repo = UserRepository(session)
        self.atproto_service = AtprotoService()
        
        # Restore atproto session if provided
        if atproto_session:
            self.atproto_service.restore_session(atproto_session)
    
    async def sync_card_to_pds(self, user_card: UserCard, user_did: str) -> Optional[str]:
        """
        Sync a single card to user's PDS
        
        Args:
            user_card: Card from database
            user_did: User's DID
            
        Returns:
            Record URI if successful
        """
        if not settings.atproto_handle or not settings.atproto_password:
            # Skip if atproto credentials not configured
            return None
        
        try:
            # Login if not already
            if not self.atproto_service.client:
                await self.atproto_service.login(
                    settings.atproto_handle,
                    settings.atproto_password
                )
            
            # Convert to API model
            card_model = CardModel(
                id=user_card.card_id,
                cp=user_card.cp,
                status=user_card.status,
                skill=user_card.skill,
                owner_did=user_did,
                obtained_at=user_card.obtained_at,
                is_unique=user_card.is_unique,
                unique_id=str(user_card.unique_id) if user_card.unique_id else None
            )
            
            # Create record in PDS
            uri = await self.atproto_service.create_card_record(
                did=user_did,
                card=card_model,
                collection=CardLexicon.LEXICON_ID
            )
            
            # Store URI in database for future reference
            # (You might want to add a field to UserCard model for this)
            
            return uri
            
        except Exception as e:
            print(f"Failed to sync card to PDS: {e}")
            return None
    
    async def sync_all_user_cards(self, user_id: int, user_did: str) -> int:
        """
        Sync all user's cards to PDS
        
        Args:
            user_id: Database user ID
            user_did: User's DID
            
        Returns:
            Number of cards synced
        """
        # Get all user cards from database
        user_cards = await self.card_repo.get_user_cards(user_id)
        
        synced_count = 0
        for card in user_cards:
            uri = await self.sync_card_to_pds(card, user_did)
            if uri:
                synced_count += 1
        
        return synced_count
    
    async def import_cards_from_pds(self, user_did: str) -> int:
        """
        Import cards from user's PDS to database
        
        Args:
            user_did: User's DID
            
        Returns:
            Number of cards imported
        """
        if not self.atproto_service.client:
            return 0
        
        # Get user from database
        user = await self.user_repo.get_by_did(user_did)
        if not user:
            return 0
        
        # Get cards from PDS
        pds_cards = await self.atproto_service.get_user_cards(
            did=user_did,
            collection=CardLexicon.LEXICON_ID
        )
        
        imported_count = 0
        for pds_card in pds_cards:
            # Check if card already exists
            existing_count = await self.card_repo.count_user_cards(
                user.id, 
                pds_card.get("cardId")
            )
            
            if existing_count == 0:
                # Import card
                await self.card_repo.create_user_card(
                    user_id=user.id,
                    card_id=pds_card.get("cardId"),
                    cp=pds_card.get("cp"),
                    status=pds_card.get("status"),
                    skill=pds_card.get("skill"),
                    is_unique=pds_card.get("isUnique", False)
                )
                imported_count += 1
        
        await self.db_session.commit()
        return imported_count
    
    async def verify_card_ownership(
        self, 
        user_did: str, 
        card_id: int,
        unique_id: Optional[str] = None
    ) -> bool:
        """
        Verify user owns a card by checking both database and PDS
        
        Args:
            user_did: User's DID
            card_id: Card type ID
            unique_id: Unique ID for unique cards
            
        Returns:
            True if user owns the card
        """
        # Check database first
        user = await self.user_repo.get_by_did(user_did)
        if user:
            user_cards = await self.card_repo.get_user_cards(user.id)
            for card in user_cards:
                if card.card_id == card_id:
                    if not unique_id or str(card.unique_id) == unique_id:
                        return True
        
        # Check PDS if configured
        if self.atproto_service.client:
            try:
                pds_cards = await self.atproto_service.get_user_cards(user_did)
                for card in pds_cards:
                    if card.get("cardId") == card_id:
                        if not unique_id or card.get("uniqueId") == unique_id:
                            return True
            except Exception:
                pass
        
        return False