from fastapi import APIRouter, Depends, HTTPException
from sqlalchemy.ext.asyncio import AsyncSession
from sqlalchemy import select
from pydantic import BaseModel
from typing import Optional
from app.database import get_db
from app.models.user import User
from app.models.shopping_list import ShoppingItem
from app.utils.security import get_current_user

router = APIRouter(prefix="/api", tags=["shopping"])

class ShoppingAdd(BaseModel):
    product_name: str
    barcode: Optional[str] = None

@router.post("/shopping-list")
async def add_to_list(data: ShoppingAdd, user: User = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
    item = ShoppingItem(user_id=user.id, product_name=data.product_name, barcode=data.barcode)
    db.add(item)
    await db.commit()
    await db.refresh(item)
    return {"id": item.id, "product_name": item.product_name, "barcode": item.barcode, "checked": item.checked, "added_at": item.added_at.isoformat()}

@router.get("/shopping-list")
async def get_list(user: User = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
    res = await db.execute(
        select(ShoppingItem).where(ShoppingItem.user_id == user.id).order_by(ShoppingItem.added_at.desc())
    )
    items = res.scalars().all()
    return [{"id": i.id, "product_name": i.product_name, "barcode": i.barcode, "checked": i.checked, 
             "added_at": i.added_at.isoformat()} for i in items]

@router.delete("/shopping-list/{item_id}")
async def delete_item(item_id: int, user: User = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
    res = await db.execute(select(ShoppingItem).where(ShoppingItem.id == item_id, ShoppingItem.user_id == user.id))
    item = res.scalar_one_or_none()
    if not item:
        raise HTTPException(status_code=404, detail="Item não encontrado")
    await db.delete(item)
    await db.commit()
    return {"ok": True}

@router.put("/shopping-list/{item_id}/toggle")
async def toggle_item(item_id: int, user: User = Depends(get_current_user), db: AsyncSession = Depends(get_db)):
    res = await db.execute(select(ShoppingItem).where(ShoppingItem.id == item_id, ShoppingItem.user_id == user.id))
    item = res.scalar_one_or_none()
    if not item:
        raise HTTPException(status_code=404, detail="Item não encontrado")
    item.checked = not item.checked
    await db.commit()
    return {"id": item.id, "checked": item.checked}