from typing import List, Optional
from pydantic import BaseModel
from datetime import datetime


class CartItemCreate(BaseModel):
    product_id: str
    product_name: str
    price: float
    quantity: int


class CartItemResponse(BaseModel):
    id: int
    product_id: str
    product_name: str
    price: float
    quantity: int

    class Config:
        from_attributes = True


class CartCreate(BaseModel):
    user_id: str


class CartResponse(BaseModel):
    id: int
    user_id: Optional[str]
    status: str
    created_at: datetime
    updated_at: datetime
    items: List[CartItemResponse] = []
    total: Optional[float] = None

    class Config:
        from_attributes = True


class CheckoutRequest(BaseModel):
    cart_id: int
    payment_method: str
    billing_address: dict


class CheckoutResponse(BaseModel):
    success: bool
    order_id: Optional[str] = None
    total_amount: float
    message: str