from __future__ import annotations

import json
from typing import Any
from urllib import error, request


class ProviderHTTPError(RuntimeError):
    def __init__(self, status_code: int, message: str):
        super().__init__(f"HTTP {status_code}: {message}")
        self.status_code = status_code
        self.message = message


def post_json(
    *,
    url: str,
    payload: dict[str, Any],
    headers: dict[str, str],
    timeout_seconds: int,
) -> dict[str, Any]:
    body = json.dumps(payload).encode("utf-8")
    req = request.Request(
        url,
        data=body,
        method="POST",
        headers={**headers, "Content-Type": "application/json"},
    )
    try:
        with request.urlopen(req, timeout=timeout_seconds) as resp:
            raw = resp.read().decode("utf-8", errors="replace")
            return json.loads(raw)
    except error.HTTPError as exc:
        text = exc.read().decode("utf-8", errors="replace")
        raise ProviderHTTPError(exc.code, text[:500]) from exc