"""
Deck management routes
"""

from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.orm import Session
from pydantic import BaseModel
from typing import List, Optional

from app.database import get_db
from app.models.deck import Deck, DeckCard
from app.models.card import Card
from app.models.user import User
from app.routers.auth import get_current_user

router = APIRouter()


# Pydantic models
class DeckResponse(BaseModel):
    id: int
    name: str
    description: Optional[str]
    format: Optional[str]
    game: str
    is_public: bool
    is_complete: bool
    is_favorite: bool
    total_cards: int
    avg_mana_cost: Optional[float]
    estimated_value: Optional[float]
    commander_card_id: Optional[int]

    class Config:
        from_attributes = True


class DeckCreate(BaseModel):
    name: str
    game: str
    description: Optional[str] = None
    format: Optional[str] = None
    is_public: bool = False
    commander_card_id: Optional[int] = None


class DeckCardResponse(BaseModel):
    id: int
    card_id: int
    card_name: str
    quantity: int
    is_sideboard: bool
    is_commander: bool
    category: Optional[str]
    notes: Optional[str]
    owned: bool
    need_to_acquire: bool

    class Config:
        from_attributes = True


class DeckCardCreate(BaseModel):
    card_id: int
    quantity: int = 1
    is_sideboard: bool = False
    is_commander: bool = False
    category: Optional[str] = None
    notes: Optional[str] = None


# Routes
@router.get("/", response_model=List[DeckResponse])
async def get_my_decks(
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Get current user's decks"""
    decks = db.query(Deck).filter(Deck.owner_id == current_user.id).all()
    return decks


@router.get("/{deck_id}", response_model=DeckResponse)
async def get_deck(
    deck_id: int,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Get a specific deck"""
    deck = db.query(Deck).filter(
        Deck.id == deck_id,
        Deck.owner_id == current_user.id
    ).first()
    
    if not deck:
        raise HTTPException(status_code=404, detail="Deck not found")
    
    return deck


@router.post("/", response_model=DeckResponse)
async def create_deck(
    deck_data: DeckCreate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Create a new deck"""
    new_deck = Deck(
        **deck_data.dict(),
        owner_id=current_user.id
    )
    
    db.add(new_deck)
    db.commit()
    db.refresh(new_deck)
    
    return new_deck


@router.get("/{deck_id}/cards", response_model=List[DeckCardResponse])
async def get_deck_cards(
    deck_id: int,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Get all cards in a deck"""
    # Verify deck ownership
    deck = db.query(Deck).filter(
        Deck.id == deck_id,
        Deck.owner_id == current_user.id
    ).first()
    
    if not deck:
        raise HTTPException(status_code=404, detail="Deck not found")
    
    # Get deck cards with card names
    cards = db.query(DeckCard, Card.name.label('card_name')).join(
        Card, DeckCard.card_id == Card.id
    ).filter(DeckCard.deck_id == deck_id).all()
    
    result = []
    for dc, card_name in cards:
        dc_dict = dc.__dict__.copy()
        dc_dict['card_name'] = card_name
        result.append(DeckCardResponse(**dc_dict))
    
    return result


@router.post("/{deck_id}/cards", response_model=DeckCardResponse)
async def add_card_to_deck(
    deck_id: int,
    card_data: DeckCardCreate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Add a card to a deck"""
    # Verify deck ownership
    deck = db.query(Deck).filter(
        Deck.id == deck_id,
        Deck.owner_id == current_user.id
    ).first()
    
    if not deck:
        raise HTTPException(status_code=404, detail="Deck not found")
    
    # Verify card exists
    card = db.query(Card).filter(Card.id == card_data.card_id).first()
    if not card:
        raise HTTPException(status_code=404, detail="Card not found")
    
    # Check if card already exists in deck (same sideboard status)
    existing_card = db.query(DeckCard).filter(
        DeckCard.deck_id == deck_id,
        DeckCard.card_id == card_data.card_id,
        DeckCard.is_sideboard == card_data.is_sideboard
    ).first()
    
    if existing_card:
        # Update quantity if card already exists
        existing_card.quantity += card_data.quantity
        db.commit()
        db.refresh(existing_card)
        
        # Add card name for response
        existing_card_dict = existing_card.__dict__.copy()
        existing_card_dict['card_name'] = card.name
        return DeckCardResponse(**existing_card_dict)
    else:
        # Create new deck card entry
        new_deck_card = DeckCard(
            deck_id=deck_id,
            **card_data.dict()
        )
        
        db.add(new_deck_card)
        db.commit()
        db.refresh(new_deck_card)
        
        # Recalculate deck stats
        deck.calculate_stats()
        db.commit()
        
        # Add card name for response
        new_card_dict = new_deck_card.__dict__.copy()
        new_card_dict['card_name'] = card.name
        return DeckCardResponse(**new_card_dict)


@router.put("/{deck_id}/calculate-stats")
async def calculate_deck_stats(
    deck_id: int,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Recalculate deck statistics"""
    deck = db.query(Deck).filter(
        Deck.id == deck_id,
        Deck.owner_id == current_user.id
    ).first()
    
    if not deck:
        raise HTTPException(status_code=404, detail="Deck not found")
    
    deck.calculate_stats()
    db.commit()
    
    return {"message": "Deck statistics updated"}