from typing import Literal
from pydantic import BaseModel, Field
from uuid import UUID
from datetime import datetime

OrderStatus = Literal["pending", "paid", "processing", "shipped", "delivered", "cancelled", "refunded"]


class OrderItemCreate(BaseModel):
    product_id: UUID
    quantity: int = Field(ge=1)


class OrderCreate(BaseModel):
    items: list[OrderItemCreate] = Field(min_length=1)
    shipping_address: dict | None = None
    notes: str | None = None


class OrderItemOut(BaseModel):
    id: UUID
    product_id: UUID
    product_name: str
    quantity: int
    unit_price: float

    @property
    def subtotal(self) -> float:
        return round(self.quantity * self.unit_price, 2)


class OrderOut(BaseModel):
    id: UUID
    user_id: UUID
    status: str
    total_amount: float
    items: list[OrderItemOut] = []
    shipping_address: dict | None = None
    notes: str | None = None
    stripe_payment_intent_id: str | None = None
    created_at: datetime
    updated_at: datetime


class CheckoutResponse(BaseModel):
    order_id: UUID
    client_secret: str
    amount: float


class UpdateOrderStatus(BaseModel):
    status: OrderStatus


class RefundRequest(BaseModel):
    reason: str | None = None
    amount: float | None = Field(None, gt=0)