from datetime import datetime
from typing import List

from pydantic import BaseModel, Field

from app.schemas.product import Product


# Shared properties
class CartItemBase(BaseModel):
    product_id: int
    quantity: int = Field(..., gt=0)


# Properties to receive on cart item creation
class CartItemCreate(CartItemBase):
    pass


# Properties to receive on cart item update
class CartItemUpdate(BaseModel):
    quantity: int = Field(..., gt=0)


class CartItemInDBBase(CartItemBase):
    id: int
    user_id: int
    created_at: datetime
    updated_at: datetime

    class Config:
        from_attributes = True


# Additional properties to return via API
class CartItem(CartItemInDBBase):
    pass


# Additional properties stored in DB
class CartItemInDB(CartItemInDBBase):
    pass


class CartItemWithProduct(CartItem):
    product: Product


class Cart(BaseModel):
    items: List[CartItemWithProduct]
    total: float