from typing import Optional

from fastapi import FastAPI
from pydantic import BaseModel, HttpUrl

app = FastAPI()


class Image(BaseModel):
    url: HttpUrl
    name: str


class Item(BaseModel):
    name: str
    description: Optional[str] = None
    price: float
    tax: Optional[float] = None
    tags: set[str] = set()
    images: Optional[list[Image]] = None


class Offer(BaseModel):
    name: str
    description: Optional[str] = None
    price: float
    items: list[Item]


@app.post("/offers/")
async def create_offer(offer: Offer):
    return offer