from lyra_worker.browser import ArtistHit, ReleaseGroupInfo


class MusicBrainzBrowser:
    """Real MbBrowser via musicbrainzngs (imported lazily; not unit-tested offline)."""

    def __init__(self, app_name: str = "Lyra", version: str = "0.1", contact: str = "lyra@localhost"):
        self._app, self._version, self._contact = app_name, version, contact

    def _ua(self):
        import musicbrainzngs

        musicbrainzngs.set_useragent(self._app, self._version, self._contact)
        return musicbrainzngs

    def search_artist(self, name: str) -> list[ArtistHit]:
        mb = self._ua()
        res = mb.search_artists(query=name, limit=8)
        return [
            ArtistHit(mbid=a["id"], name=a.get("name", ""), disambiguation=a.get("disambiguation", ""))
            for a in res.get("artist-list", [])
        ]

    def browse_release_groups(self, artist_mbid: str) -> list[ReleaseGroupInfo]:
        mb = self._ua()
        out: list[ReleaseGroupInfo] = []
        offset = 0
        while True:
            res = mb.browse_release_groups(artist=artist_mbid, limit=100, offset=offset)
            groups = res.get("release-group-list", [])
            for g in groups:
                out.append(
                    ReleaseGroupInfo(
                        rg_mbid=g["id"],
                        title=g.get("title", ""),
                        primary_type=g.get("primary-type", "") or "",
                        secondary_types=tuple(g.get("secondary-type-list", []) or ()),
                        first_release_date=g.get("first-release-date", "") or "",
                    )
                )
            offset += len(groups)
            if len(groups) < 100 or offset >= int(res.get("release-group-count", offset)):
                break
        return out