"""Tests für cddb.py — CddbResult, DYEAR/DGENRE-Parsing."""

from unittest.mock import MagicMock, patch

from musiksammlung.cddb import CddbResult, _read_gnudb, lookup_by_discid


def _make_xmcd_response(
    dtitle: str = "Artist / Album Title",
    dyear: str = "",
    dgenre: str = "",
    ttitles: dict[int, str] | None = None,
) -> str:
    """Baut eine GnuDB-xmcd-Antwort zusammen."""
    lines = ["210 OK"]
    lines.append(f"DTITLE={dtitle}")
    if dyear:
        lines.append(f"DYEAR={dyear}")
    if dgenre:
        lines.append(f"DGENRE={dgenre}")
    if ttitles is None:
        ttitles = {0: "Track One", 1: "Track Two"}
    for idx, title in sorted(ttitles.items()):
        lines.append(f"TTITLE{idx}={title}")
    lines.append(".")
    return "\n".join(lines)


class TestReadGnudbCddbResult:
    """Tests für _read_gnudb mit CddbResult-Rückgabe."""

    def _call(self, xmcd_text: str) -> CddbResult | None:
        """Ruft _read_gnudb mit gemockter HTTP-Antwort auf."""
        mock_response = MagicMock()
        mock_response.text = xmcd_text
        mock_response.raise_for_status = MagicMock()

        with patch("musiksammlung.cddb.httpx.get", return_value=mock_response):
            with patch("musiksammlung.cddb.time.sleep"):
                return _read_gnudb("rock", "ab0c1d0e")

    def test_basic_result_fields(self) -> None:
        """CddbResult enthält Artist, Album, Tracks."""
        text = _make_xmcd_response(dtitle="Beatles / Abbey Road")
        result = self._call(text)

        assert result is not None
        assert isinstance(result, CddbResult)
        assert result.artist == "Beatles"
        assert result.album == "Abbey Road"
        assert len(result.tracks) == 2
        assert result.tracks[0].track_number == 1
        assert result.tracks[0].title == "Track One"

    def test_dyear_parsed(self) -> None:
        """DYEAR wird als int geparst."""
        text = _make_xmcd_response(dyear="1969")
        result = self._call(text)

        assert result is not None
        assert result.year == 1969

    def test_dyear_empty(self) -> None:
        """Kein DYEAR → year=None."""
        text = _make_xmcd_response(dyear="")
        result = self._call(text)

        assert result is not None
        assert result.year is None

    def test_dyear_invalid(self) -> None:
        """Ungültiges DYEAR → year=None."""
        text = _make_xmcd_response(dyear="unknown")
        result = self._call(text)

        assert result is not None
        assert result.year is None

    def test_dgenre_parsed(self) -> None:
        """DGENRE wird übernommen."""
        text = _make_xmcd_response(dgenre="Classical")
        result = self._call(text)

        assert result is not None
        assert result.genre == "Classical"

    def test_dgenre_empty(self) -> None:
        """Kein DGENRE → genre=''."""
        text = _make_xmcd_response()
        result = self._call(text)

        assert result is not None
        assert result.genre == ""

    def test_dyear_and_dgenre_together(self) -> None:
        """Beide Felder gleichzeitig."""
        text = _make_xmcd_response(
            dtitle="Karajan / Beethoven Sinfonien",
            dyear="1985",
            dgenre="Classical",
        )
        result = self._call(text)

        assert result is not None
        assert result.artist == "Karajan"
        assert result.album == "Beethoven Sinfonien"
        assert result.year == 1985
        assert result.genre == "Classical"

    def test_no_ttitles_returns_none(self) -> None:
        """Keine TTITLEs → None."""
        text = _make_xmcd_response(ttitles={})
        result = self._call(text)

        assert result is None

    def test_dtitle_without_slash(self) -> None:
        """DTITLE ohne ' / ' → artist leer, album = gesamter DTITLE."""
        text = _make_xmcd_response(dtitle="Just An Album Name")
        result = self._call(text)

        assert result is not None
        assert result.artist == ""
        assert result.album == "Just An Album Name"

    def test_bad_status_code_returns_none(self) -> None:
        """Unerwarteter Statuscode → None."""
        mock_response = MagicMock()
        mock_response.text = "401 permission denied\n"
        mock_response.raise_for_status = MagicMock()

        with patch("musiksammlung.cddb.httpx.get", return_value=mock_response):
            with patch("musiksammlung.cddb.time.sleep"):
                result = _read_gnudb("rock", "ab0c1d0e")

        assert result is None


class TestLookupByDiscidCddbResult:
    """Tests dass lookup_by_discid CddbResult zurückgibt."""

    def test_returns_cddb_result(self) -> None:
        """Erfolgreicher Lookup liefert CddbResult."""
        expected = CddbResult(
            tracks=[],
            artist="Test",
            album="Album",
            year=2000,
            genre="Pop",
        )
        with (
            patch("musiksammlung.cddb._query_gnudb", return_value=("rock", "ab0c1d0e")),
            patch("musiksammlung.cddb._read_gnudb", return_value=expected),
        ):
            result = lookup_by_discid("ab0c1d0e 2 150 1000 200")

        assert result is expected

    def test_returns_none_on_no_match(self) -> None:
        """Kein Treffer → None."""
        with (
            patch("musiksammlung.cddb._query_gnudb", return_value=None),
            patch("musiksammlung.cddb.time.sleep"),
            patch("musiksammlung.cddb.random.uniform", return_value=0.01),
        ):
            result = lookup_by_discid("ab0c1d0e 2 150 1000 200", retries=0)

        assert result is None