from __future__ import annotations

from typing import Any

import httpx


class LastFmClient:
    BASE_URL = "https://ws.audioscrobbler.com/2.0/"

    def __init__(self, api_key: str | None, http: httpx.AsyncClient) -> None:
        self.api_key = api_key
        self.http = http

    @property
    def enabled(self) -> bool:
        return bool(self.api_key)

    async def track_similar(self, *, artist: str, track: str, limit: int = 20) -> list[dict[str, Any]]:
        if not self.api_key:
            return []
        params = {
            "method": "track.getSimilar",
            "api_key": self.api_key,
            "artist": artist,
            "track": track,
            "limit": limit,
            "format": "json",
            "autocorrect": 1,
        }
        resp = await self.http.get(self.BASE_URL, params=params, timeout=20)
        resp.raise_for_status()
        data = resp.json()
        similar = ((data.get("similartracks") or {}).get("track")) or []
        if isinstance(similar, dict):
            similar = [similar]
        return similar

    async def artist_similar(self, *, artist: str, limit: int = 15) -> list[dict[str, Any]]:
        if not self.api_key:
            return []
        params = {
            "method": "artist.getSimilar",
            "api_key": self.api_key,
            "artist": artist,
            "limit": limit,
            "format": "json",
            "autocorrect": 1,
        }
        resp = await self.http.get(self.BASE_URL, params=params, timeout=20)
        resp.raise_for_status()
        data = resp.json()
        similar = ((data.get("similarartists") or {}).get("artist")) or []
        if isinstance(similar, dict):
            similar = [similar]
        return similar