import pytest
from datetime import datetime

from lintunes.models import Track, Playlist, PlaylistSettings, PlaylistType, Library


class TestTrack:
    def test_to_dict_omits_defaults(self):
        track = Track(track_id=1, name="Test Song")
        d = track.to_dict()
        assert d == {"track_id": 1, "name": "Test Song"}
        assert "genre" not in d
        assert "play_count" not in d

    def test_from_dict_round_trip(self):
        track = Track(
            track_id=42,
            name="My Song",
            artist="The Artist",
            album="The Album",
            genre="Rock",
            total_time=180000,
            play_count=5,
            rating=80,
            loved=True,
            date_added="2020-01-15T10:30:00",
        )
        d = track.to_dict()
        restored = Track.from_dict(d)
        assert restored.track_id == 42
        assert restored.name == "My Song"
        assert restored.artist == "The Artist"
        assert restored.play_count == 5
        assert restored.rating == 80
        assert restored.loved is True

    def test_from_dict_ignores_unknown_fields(self):
        d = {"track_id": 1, "name": "Test", "unknown_field": "ignored"}
        track = Track.from_dict(d)
        assert track.track_id == 1
        assert track.name == "Test"

    def test_from_itunes_dict(self):
        itunes_data = {
            "Track ID": 100,
            "Name": "iTunes Song",
            "Artist": "iTunes Artist",
            "Album": "iTunes Album",
            "Genre": "Pop",
            "Total Time": 240000,
            "Play Count": 10,
            "Play Date UTC": datetime(2023, 6, 15, 12, 0, 0),
            "Date Added": datetime(2020, 3, 1, 8, 0, 0),
            "Rating": 100,
            "Loved": True,
            "Persistent ID": "ABC123",
            "Location": "file://localhost/Users/me/Music/Artist/Album/Song.mp3",
        }
        track = Track.from_itunes_dict(itunes_data)
        assert track.track_id == 100
        assert track.name == "iTunes Song"
        assert track.total_time == 240000
        assert track.play_count == 10
        assert track.rating == 100
        assert track.loved is True
        assert track.play_date_utc == "2023-06-15T12:00:00"
        assert track.location == "/Users/me/Music/Artist/Album/Song.mp3"

    def test_location_decoding(self):
        itunes_data = {
            "Track ID": 1,
            "Location": "file://localhost/Users/me/Music/The%20Artist/My%20Album/01%20Song.mp3",
        }
        track = Track.from_itunes_dict(itunes_data)
        assert track.location == "/Users/me/Music/The Artist/My Album/01 Song.mp3"

    def test_location_decoding_volumes_form(self):
        # Modern iTunes XML uses file:///Volumes/... URLs
        itunes_data = {
            "Track ID": 1,
            "Location": "file:///Volumes/Lucia/iTunes/iTunes%20Media/Music/A/B/C.m4a",
        }
        track = Track.from_itunes_dict(itunes_data)
        assert track.location == "/Volumes/Lucia/iTunes/iTunes Media/Music/A/B/C.m4a"


class TestPlaylist:
    def test_to_dict_from_dict_round_trip(self):
        playlist = Playlist(
            name="My Favorites",
            persistent_id="ABCD1234",
            playlist_type=PlaylistType.REGULAR,
            track_ids=[1, 2, 3, 4, 5],
        )
        d = playlist.to_dict()
        restored = Playlist.from_dict(d)
        assert restored.name == "My Favorites"
        assert restored.persistent_id == "ABCD1234"
        assert restored.playlist_type == PlaylistType.REGULAR
        assert restored.track_ids == [1, 2, 3, 4, 5]

    def test_from_itunes_dict_regular(self):
        itunes_data = {
            "Name": "Party Mix",
            "Playlist Persistent ID": "XYZ789",
            "Playlist Items": [
                {"Track ID": 10},
                {"Track ID": 20},
                {"Track ID": 30},
            ],
        }
        playlist = Playlist.from_itunes_dict(itunes_data)
        assert playlist.name == "Party Mix"
        assert playlist.persistent_id == "XYZ789"
        assert playlist.playlist_type == PlaylistType.REGULAR
        assert playlist.track_ids == [10, 20, 30]
        assert playlist.is_system is False

    def test_from_itunes_dict_system(self):
        itunes_data = {
            "Name": "Library",
            "Master": True,
            "Playlist Persistent ID": "MASTER1",
            "Playlist Items": [{"Track ID": 1}],
        }
        playlist = Playlist.from_itunes_dict(itunes_data)
        assert playlist.is_system is True
        assert playlist.playlist_type == PlaylistType.SYSTEM

    def test_from_itunes_dict_folder(self):
        itunes_data = {
            "Name": "My Folder",
            "Folder": True,
            "Playlist Persistent ID": "FOLDER1",
        }
        playlist = Playlist.from_itunes_dict(itunes_data)
        assert playlist.playlist_type == PlaylistType.FOLDER

    def test_from_itunes_dict_smart(self):
        itunes_data = {
            "Name": "Recently Added",
            "Smart Info": b"...",
            "Smart Criteria": b"...",
            "Playlist Persistent ID": "SMART1",
        }
        playlist = Playlist.from_itunes_dict(itunes_data)
        assert playlist.playlist_type == PlaylistType.SMART


class TestPlaylistSettings:
    def test_default_settings(self):
        settings = PlaylistSettings()
        assert "name" in settings.visible_columns
        assert settings.sort_ascending is True

    def test_round_trip(self):
        settings = PlaylistSettings(
            visible_columns=["name", "artist"],
            sort_column="artist",
            sort_ascending=False,
            column_widths={"name": 300},
        )
        d = settings.to_dict()
        restored = PlaylistSettings.from_dict(d)
        assert restored.visible_columns == ["name", "artist"]
        assert restored.sort_column == "artist"
        assert restored.sort_ascending is False
        assert restored.column_widths == {"name": 300}


class TestLibrary:
    def test_empty_library(self):
        lib = Library()
        assert len(lib.tracks) == 0
        assert len(lib.playlists) == 0