import asyncio
from typing import Any, Dict, List, Optional

import httpx

from rate_limiter import JIKAN_RATE_LIMITER

BASE_URL = "https://api.jikan.moe/v4"
CLIENT = httpx.AsyncClient(timeout=15.0)


async def _get(path: str, params: Optional[Dict[str, Any]] = None) -> Dict[str, Any]:
    """
    Обёртка над GET с ретраями и rate-limit'ом.
    """
    url = f"{BASE_URL}{path}"
    last_exc: Exception | None = None

    for i in range(5):
        await JIKAN_RATE_LIMITER.acquire()
        try:
            r = await CLIENT.get(url, params=params)
            r.raise_for_status()
            return r.json()
        except Exception as exc:
            last_exc = exc
            await asyncio.sleep(1 * 2**i)

    raise RuntimeError(f"Jikan unreachable: {last_exc!r}")


async def search_producer(name: str, limit: int = 1) -> List[Dict[str, Any]]:
    """
    Поиск студии/продюсера по имени.

    Возвращает список элементов из data[]:
    [{ "mal_id": int, "name": str, ... }, ...]
    """
    if not name:
        return []

    data = await _get("/producers", {"q": name, "limit": limit})
    return data.get("data") or []


async def fetch_producer_full(mal_id: int) -> Optional[Dict[str, Any]]:
    """
    Полная инфа по producer'у (есть поле about).
    """
    if not isinstance(mal_id, int):
        return None

    data = await _get(f"/producers/{mal_id}/full")
    return data.get("data") or None