"""
Collection 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.collection import Collection, CollectionCard
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 CollectionResponse(BaseModel):
    id: int
    name: str
    description: Optional[str]
    is_public: bool
    total_cards: int
    total_value: float

    class Config:
        from_attributes = True


class CollectionCreate(BaseModel):
    name: str
    description: Optional[str] = None
    is_public: bool = False


class CollectionCardResponse(BaseModel):
    id: int
    card_id: int
    card_name: str
    quantity: int
    condition: str
    foil: bool
    language: str
    location: Optional[str]
    notes: Optional[str]
    purchase_price: Optional[float]

    class Config:
        from_attributes = True


class CollectionCardCreate(BaseModel):
    card_id: int
    quantity: int = 1
    condition: str = "NM"
    foil: bool = False
    language: str = "English"
    location: Optional[str] = None
    notes: Optional[str] = None
    purchase_price: Optional[float] = None


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


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


@router.post("/", response_model=CollectionResponse)
async def create_collection(
    collection_data: CollectionCreate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Create a new collection"""
    new_collection = Collection(
        **collection_data.dict(),
        owner_id=current_user.id
    )
    
    db.add(new_collection)
    db.commit()
    db.refresh(new_collection)
    
    return new_collection


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


@router.post("/{collection_id}/cards", response_model=CollectionCardResponse)
async def add_card_to_collection(
    collection_id: int,
    card_data: CollectionCardCreate,
    current_user: User = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    """Add a card to a collection"""
    # Verify collection ownership
    collection = db.query(Collection).filter(
        Collection.id == collection_id,
        Collection.owner_id == current_user.id
    ).first()
    
    if not collection:
        raise HTTPException(status_code=404, detail="Collection 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 collection
    existing_card = db.query(CollectionCard).filter(
        CollectionCard.collection_id == collection_id,
        CollectionCard.card_id == card_data.card_id,
        CollectionCard.condition == card_data.condition,
        CollectionCard.foil == card_data.foil
    ).first()
    
    if existing_card:
        # Update quantity if card already exists with same condition/foil
        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 CollectionCardResponse(**existing_card_dict)
    else:
        # Create new collection card entry
        new_collection_card = CollectionCard(
            collection_id=collection_id,
            **card_data.dict()
        )
        
        db.add(new_collection_card)
        db.commit()
        db.refresh(new_collection_card)
        
        # Add card name for response
        new_card_dict = new_collection_card.__dict__.copy()
        new_card_dict['card_name'] = card.name
        return CollectionCardResponse(**new_card_dict)