import httpx


class ApiError(Exception):
    def __init__(self, detail: str) -> None:
        super().__init__(detail)
        self.detail = detail


class ShopApi:
    def __init__(self, base_url: str, secret: str) -> None:
        self.client = httpx.AsyncClient(
            base_url=base_url.rstrip("/"),
            headers={"X-Bot-Secret": secret},
            timeout=10,
        )

    async def close(self) -> None:
        await self.client.aclose()

    async def _request(self, method: str, path: str, json: dict | None = None):
        response = await self.client.request(method, path, json=json)
        if response.status_code >= 400:
            detail = "Ошибка запроса"
            try:
                body = response.json()
                if isinstance(body.get("detail"), str):
                    detail = body["detail"]
            except Exception:
                pass
            raise ApiError(detail)
        if response.status_code == 204 or not response.content:
            return None
        return response.json()

    async def products(self) -> list[dict]:
        data = await self._request("GET", "/products?limit=100")
        return data["products"]

    async def product(self, product_id: int) -> dict:
        return await self._request("GET", f"/products/{product_id}")

    async def add(self, telegram_user_id: int, product_id: int) -> dict:
        return await self._request(
            "POST",
            "/internal/cart/items",
            {"telegram_user_id": telegram_user_id, "product_id": product_id, "qty": 1},
        )

    async def cart(self, telegram_user_id: int) -> dict:
        return await self._request("GET", f"/internal/cart/{telegram_user_id}")

    async def dialog(self, telegram_user_id: int) -> dict | None:
        return await self._request("GET", f"/internal/dialog/{telegram_user_id}")

    async def save_dialog(self, telegram_user_id: int, step: str, name: str | None) -> dict:
        return await self._request(
            "PUT",
            f"/internal/dialog/{telegram_user_id}",
            {"step": step, "name": name},
        )

    async def clear_dialog(self, telegram_user_id: int) -> None:
        await self._request("DELETE", f"/internal/dialog/{telegram_user_id}")

    async def order(self, telegram_user_id: int, name: str, phone: str) -> dict:
        return await self._request(
            "POST",
            "/internal/orders",
            {"telegram_user_id": telegram_user_id, "customer_name": name, "customer_phone": phone},
        )