"""MusicBrainz-Matching — Phase 5."""
import httpx
from .base import MatchResult

MB_BASE = "https://musicbrainz.org/ws/2"
HEADERS = {"User-Agent": "audiolib/1.0 (https://github.com/audiolib)"}


async def search_musicbrainz(title: str, artist: str | None = None) -> list[MatchResult]:
    query = f'release:"{title}"'
    if artist:
        query += f' AND artist:"{artist}"'
    query += " AND format:Digital"

    async with httpx.AsyncClient(headers=HEADERS, timeout=10) as client:
        resp = await client.get(
            f"{MB_BASE}/release",
            params={"query": query, "fmt": "json", "limit": 5},
        )
        resp.raise_for_status()
        data = resp.json()

    results = []
    for release in data.get("releases", []):
        confidence = release.get("score", 0) / 100.0
        artist_name = None
        credits = release.get("artist-credit", [])
        if credits:
            artist_name = credits[0].get("name") or credits[0].get("artist", {}).get("name")

        results.append(
            MatchResult(
                source="musicbrainz",
                source_id=release.get("id", ""),
                title=release.get("title", title),
                author=artist_name,
                confidence=confidence,
            )
        )
    return results