import os

import httpx

# NB : base URL et schémas d'endpoints à confirmer dans la doc Frisbii lors de la
# première intégration en environnement de test. Frisbii Billing/Pay s'appuie sur
# l'API Reepay (api.reepay.com) ; ajuster FRISBII_API_BASE_URL si besoin.
_DEFAULT_BASE_URL = "https://api.reepay.com"
_TIMEOUT = 15.0


class FrisbiiError(Exception):
    def __init__(self, status_code: int, body):
        super().__init__(f"Frisbii API error {status_code}: {body}")
        self.status_code = status_code
        self.body = body


def _api_key() -> str:
    return os.getenv("FRISBII_API_KEY", "")


def _base_url() -> str:
    return os.getenv("FRISBII_API_BASE_URL") or _DEFAULT_BASE_URL


def _call(method: str, path: str, json: dict | None = None) -> dict:
    resp = httpx.request(
        method,
        f"{_base_url()}{path}",
        auth=(_api_key(), ""),
        json=json,
        timeout=_TIMEOUT,
    )
    if resp.status_code >= 400:
        raise FrisbiiError(resp.status_code, resp.text)
    return resp.json()


def get_or_create_customer(handle: str, email: str) -> dict:
    try:
        return _call("GET", f"/v1/customer/{handle}")
    except FrisbiiError as exc:
        if exc.status_code != 404:
            raise
        return _call("POST", "/v1/customer", json={"handle": handle, "email": email})


def create_subscription_session(
    plan_handle: str,
    customer_handle: str,
    accept_url: str,
    cancel_url: str,
    no_trial: bool = False,
) -> str:
    prepare = {"plan": plan_handle, "customer": customer_handle}
    if no_trial:
        prepare["no_trial"] = True
    data = _call(
        "POST",
        "/v1/session/subscription",
        json={
            "accept_url": accept_url,
            "cancel_url": cancel_url,
            "prepare_subscription": prepare,
        },
    )
    return data["url"]


def cancel_subscription(subscription_handle: str) -> dict:
    return _call("POST", f"/v1/subscription/{subscription_handle}/cancel")


def get_subscription(subscription_handle: str) -> dict:
    return _call("GET", f"/v1/subscription/{subscription_handle}")


def get_plan(plan_handle: str) -> dict:
    return _call("GET", f"/v1/plan/{plan_handle}")