# This file is part of beets.
# Copyright 2016, Adrian Sampson.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.

"""Tests for autotagging functionality.
"""

import re
import unittest

from beets import autotag, config
from beets.autotag import AlbumInfo, TrackInfo, match
from beets.autotag.hooks import Distance, string_dist
from beets.library import Item
from beets.test import _common
from beets.util import plurality


class PluralityTest(_common.TestCase):
    def test_plurality_consensus(self):
        objs = [1, 1, 1, 1]
        obj, freq = plurality(objs)
        self.assertEqual(obj, 1)
        self.assertEqual(freq, 4)

    def test_plurality_near_consensus(self):
        objs = [1, 1, 2, 1]
        obj, freq = plurality(objs)
        self.assertEqual(obj, 1)
        self.assertEqual(freq, 3)

    def test_plurality_conflict(self):
        objs = [1, 1, 2, 2, 3]
        obj, freq = plurality(objs)
        self.assertIn(obj, (1, 2))
        self.assertEqual(freq, 2)

    def test_plurality_empty_sequence_raises_error(self):
        with self.assertRaises(ValueError):
            plurality([])

    def test_current_metadata_finds_pluralities(self):
        items = [
            Item(artist="The Beetles", album="The White Album"),
            Item(artist="The Beatles", album="The White Album"),
            Item(artist="The Beatles", album="Teh White Album"),
        ]
        likelies, consensus = match.current_metadata(items)
        self.assertEqual(likelies["artist"], "The Beatles")
        self.assertEqual(likelies["album"], "The White Album")
        self.assertFalse(consensus["artist"])

    def test_current_metadata_artist_consensus(self):
        items = [
            Item(artist="The Beatles", album="The White Album"),
            Item(artist="The Beatles", album="The White Album"),
            Item(artist="The Beatles", album="Teh White Album"),
        ]
        likelies, consensus = match.current_metadata(items)
        self.assertEqual(likelies["artist"], "The Beatles")
        self.assertEqual(likelies["album"], "The White Album")
        self.assertTrue(consensus["artist"])

    def test_albumartist_consensus(self):
        items = [
            Item(artist="tartist1", album="album", albumartist="aartist"),
            Item(artist="tartist2", album="album", albumartist="aartist"),
            Item(artist="tartist3", album="album", albumartist="aartist"),
        ]
        likelies, consensus = match.current_metadata(items)
        self.assertEqual(likelies["artist"], "aartist")
        self.assertFalse(consensus["artist"])

    def test_current_metadata_likelies(self):
        fields = [
            "artist",
            "album",
            "albumartist",
            "year",
            "disctotal",
            "mb_albumid",
            "label",
            "barcode",
            "catalognum",
            "country",
            "media",
            "albumdisambig",
        ]
        items = [
            Item(**{f: "{}_{}".format(f, i or 1) for f in fields})
            for i in range(5)
        ]
        likelies, _ = match.current_metadata(items)
        for f in fields:
            if isinstance(likelies[f], int):
                self.assertEqual(likelies[f], 0)
            else:
                self.assertEqual(likelies[f], "%s_1" % f)


def _make_item(title, track, artist="some artist"):
    return Item(
        title=title,
        track=track,
        artist=artist,
        album="some album",
        length=1,
        mb_trackid="",
        mb_albumid="",
        mb_artistid="",
    )


def _make_trackinfo():
    return [
        TrackInfo(
            title="one", track_id=None, artist="some artist", length=1, index=1
        ),
        TrackInfo(
            title="two", track_id=None, artist="some artist", length=1, index=2
        ),
        TrackInfo(
            title="three",
            track_id=None,
            artist="some artist",
            length=1,
            index=3,
        ),
    ]


def _clear_weights():
    """Hack around the lazy descriptor used to cache weights for
    Distance calculations.
    """
    Distance.__dict__["_weights"].computed = False


class DistanceTest(_common.TestCase):
    def tearDown(self):
        super().tearDown()
        _clear_weights()

    def test_add(self):
        dist = Distance()
        dist.add("add", 1.0)
        self.assertEqual(dist._penalties, {"add": [1.0]})

    def test_add_equality(self):
        dist = Distance()
        dist.add_equality("equality", "ghi", ["abc", "def", "ghi"])
        self.assertEqual(dist._penalties["equality"], [0.0])

        dist.add_equality("equality", "xyz", ["abc", "def", "ghi"])
        self.assertEqual(dist._penalties["equality"], [0.0, 1.0])

        dist.add_equality("equality", "abc", re.compile(r"ABC", re.I))
        self.assertEqual(dist._penalties["equality"], [0.0, 1.0, 0.0])

    def test_add_expr(self):
        dist = Distance()
        dist.add_expr("expr", True)
        self.assertEqual(dist._penalties["expr"], [1.0])

        dist.add_expr("expr", False)
        self.assertEqual(dist._penalties["expr"], [1.0, 0.0])

    def test_add_number(self):
        dist = Distance()
        # Add a full penalty for each number of difference between two numbers.

        dist.add_number("number", 1, 1)
        self.assertEqual(dist._penalties["number"], [0.0])

        dist.add_number("number", 1, 2)
        self.assertEqual(dist._penalties["number"], [0.0, 1.0])

        dist.add_number("number", 2, 1)
        self.assertEqual(dist._penalties["number"], [0.0, 1.0, 1.0])

        dist.add_number("number", -1, 2)
        self.assertEqual(
            dist._penalties["number"], [0.0, 1.0, 1.0, 1.0, 1.0, 1.0]
        )

    def test_add_priority(self):
        dist = Distance()
        dist.add_priority("priority", "abc", "abc")
        self.assertEqual(dist._penalties["priority"], [0.0])

        dist.add_priority("priority", "def", ["abc", "def"])
        self.assertEqual(dist._penalties["priority"], [0.0, 0.5])

        dist.add_priority(
            "priority", "gh", ["ab", "cd", "ef", re.compile("GH", re.I)]
        )
        self.assertEqual(dist._penalties["priority"], [0.0, 0.5, 0.75])

        dist.add_priority("priority", "xyz", ["abc", "def"])
        self.assertEqual(dist._penalties["priority"], [0.0, 0.5, 0.75, 1.0])

    def test_add_ratio(self):
        dist = Distance()
        dist.add_ratio("ratio", 25, 100)
        self.assertEqual(dist._penalties["ratio"], [0.25])

        dist.add_ratio("ratio", 10, 5)
        self.assertEqual(dist._penalties["ratio"], [0.25, 1.0])

        dist.add_ratio("ratio", -5, 5)
        self.assertEqual(dist._penalties["ratio"], [0.25, 1.0, 0.0])

        dist.add_ratio("ratio", 5, 0)
        self.assertEqual(dist._penalties["ratio"], [0.25, 1.0, 0.0, 0.0])

    def test_add_string(self):
        dist = Distance()
        sdist = string_dist("abc", "bcd")
        dist.add_string("string", "abc", "bcd")
        self.assertEqual(dist._penalties["string"], [sdist])
        self.assertNotEqual(dist._penalties["string"], [0])

    def test_add_string_none(self):
        dist = Distance()
        dist.add_string("string", None, "string")
        self.assertEqual(dist._penalties["string"], [1])

    def test_add_string_both_none(self):
        dist = Distance()
        dist.add_string("string", None, None)
        self.assertEqual(dist._penalties["string"], [0])

    def test_distance(self):
        config["match"]["distance_weights"]["album"] = 2.0
        config["match"]["distance_weights"]["medium"] = 1.0
        _clear_weights()

        dist = Distance()
        dist.add("album", 0.5)
        dist.add("media", 0.25)
        dist.add("media", 0.75)
        self.assertEqual(dist.distance, 0.5)

        # __getitem__()
        self.assertEqual(dist["album"], 0.25)
        self.assertEqual(dist["media"], 0.25)

    def test_max_distance(self):
        config["match"]["distance_weights"]["album"] = 3.0
        config["match"]["distance_weights"]["medium"] = 1.0
        _clear_weights()

        dist = Distance()
        dist.add("album", 0.5)
        dist.add("medium", 0.0)
        dist.add("medium", 0.0)
        self.assertEqual(dist.max_distance, 5.0)

    def test_operators(self):
        config["match"]["distance_weights"]["source"] = 1.0
        config["match"]["distance_weights"]["album"] = 2.0
        config["match"]["distance_weights"]["medium"] = 1.0
        _clear_weights()

        dist = Distance()
        dist.add("source", 0.0)
        dist.add("album", 0.5)
        dist.add("medium", 0.25)
        dist.add("medium", 0.75)
        self.assertEqual(len(dist), 2)
        self.assertEqual(list(dist), [("album", 0.2), ("medium", 0.2)])
        self.assertEqual(dist, 0.4)
        self.assertLess(dist, 1.0)
        self.assertGreater(dist, 0.0)
        self.assertEqual(dist - 0.4, 0.0)
        self.assertEqual(0.4 - dist, 0.0)
        self.assertEqual(float(dist), 0.4)

    def test_raw_distance(self):
        config["match"]["distance_weights"]["album"] = 3.0
        config["match"]["distance_weights"]["medium"] = 1.0
        _clear_weights()

        dist = Distance()
        dist.add("album", 0.5)
        dist.add("medium", 0.25)
        dist.add("medium", 0.5)
        self.assertEqual(dist.raw_distance, 2.25)

    def test_items(self):
        config["match"]["distance_weights"]["album"] = 4.0
        config["match"]["distance_weights"]["medium"] = 2.0
        _clear_weights()

        dist = Distance()
        dist.add("album", 0.1875)
        dist.add("medium", 0.75)
        self.assertEqual(dist.items(), [("medium", 0.25), ("album", 0.125)])

        # Sort by key if distance is equal.
        dist = Distance()
        dist.add("album", 0.375)
        dist.add("medium", 0.75)
        self.assertEqual(dist.items(), [("album", 0.25), ("medium", 0.25)])

    def test_update(self):
        dist1 = Distance()
        dist1.add("album", 0.5)
        dist1.add("media", 1.0)

        dist2 = Distance()
        dist2.add("album", 0.75)
        dist2.add("album", 0.25)
        dist2.add("media", 0.05)

        dist1.update(dist2)

        self.assertEqual(
            dist1._penalties, {"album": [0.5, 0.75, 0.25], "media": [1.0, 0.05]}
        )


class TrackDistanceTest(_common.TestCase):
    def test_identical_tracks(self):
        item = _make_item("one", 1)
        info = _make_trackinfo()[0]
        dist = match.track_distance(item, info, incl_artist=True)
        self.assertEqual(dist, 0.0)

    def test_different_title(self):
        item = _make_item("foo", 1)
        info = _make_trackinfo()[0]
        dist = match.track_distance(item, info, incl_artist=True)
        self.assertNotEqual(dist, 0.0)

    def test_different_artist(self):
        item = _make_item("one", 1)
        item.artist = "foo"
        info = _make_trackinfo()[0]
        dist = match.track_distance(item, info, incl_artist=True)
        self.assertNotEqual(dist, 0.0)

    def test_various_artists_tolerated(self):
        item = _make_item("one", 1)
        item.artist = "Various Artists"
        info = _make_trackinfo()[0]
        dist = match.track_distance(item, info, incl_artist=True)
        self.assertEqual(dist, 0.0)


class AlbumDistanceTest(_common.TestCase):
    def _mapping(self, items, info):
        out = {}
        for i, t in zip(items, info.tracks):
            out[i] = t
        return out

    def _dist(self, items, info):
        return match.distance(items, info, self._mapping(items, info))

    def test_identical_albums(self):
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("two", 2))
        items.append(_make_item("three", 3))
        info = AlbumInfo(
            artist="some artist",
            album="some album",
            tracks=_make_trackinfo(),
            va=False,
        )
        self.assertEqual(self._dist(items, info), 0)

    def test_incomplete_album(self):
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("three", 3))
        info = AlbumInfo(
            artist="some artist",
            album="some album",
            tracks=_make_trackinfo(),
            va=False,
        )
        dist = self._dist(items, info)
        self.assertNotEqual(dist, 0)
        # Make sure the distance is not too great
        self.assertLess(dist, 0.2)

    def test_global_artists_differ(self):
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("two", 2))
        items.append(_make_item("three", 3))
        info = AlbumInfo(
            artist="someone else",
            album="some album",
            tracks=_make_trackinfo(),
            va=False,
        )
        self.assertNotEqual(self._dist(items, info), 0)

    def test_comp_track_artists_match(self):
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("two", 2))
        items.append(_make_item("three", 3))
        info = AlbumInfo(
            artist="should be ignored",
            album="some album",
            tracks=_make_trackinfo(),
            va=True,
        )
        self.assertEqual(self._dist(items, info), 0)

    def test_comp_no_track_artists(self):
        # Some VA releases don't have track artists (incomplete metadata).
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("two", 2))
        items.append(_make_item("three", 3))
        info = AlbumInfo(
            artist="should be ignored",
            album="some album",
            tracks=_make_trackinfo(),
            va=True,
        )
        info.tracks[0].artist = None
        info.tracks[1].artist = None
        info.tracks[2].artist = None
        self.assertEqual(self._dist(items, info), 0)

    def test_comp_track_artists_do_not_match(self):
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("two", 2, "someone else"))
        items.append(_make_item("three", 3))
        info = AlbumInfo(
            artist="some artist",
            album="some album",
            tracks=_make_trackinfo(),
            va=True,
        )
        self.assertNotEqual(self._dist(items, info), 0)

    def test_tracks_out_of_order(self):
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("three", 2))
        items.append(_make_item("two", 3))
        info = AlbumInfo(
            artist="some artist",
            album="some album",
            tracks=_make_trackinfo(),
            va=False,
        )
        dist = self._dist(items, info)
        self.assertTrue(0 < dist < 0.2)

    def test_two_medium_release(self):
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("two", 2))
        items.append(_make_item("three", 3))
        info = AlbumInfo(
            artist="some artist",
            album="some album",
            tracks=_make_trackinfo(),
            va=False,
        )
        info.tracks[0].medium_index = 1
        info.tracks[1].medium_index = 2
        info.tracks[2].medium_index = 1
        dist = self._dist(items, info)
        self.assertEqual(dist, 0)

    def test_per_medium_track_numbers(self):
        items = []
        items.append(_make_item("one", 1))
        items.append(_make_item("two", 2))
        items.append(_make_item("three", 1))
        info = AlbumInfo(
            artist="some artist",
            album="some album",
            tracks=_make_trackinfo(),
            va=False,
        )
        info.tracks[0].medium_index = 1
        info.tracks[1].medium_index = 2
        info.tracks[2].medium_index = 1
        dist = self._dist(items, info)
        self.assertEqual(dist, 0)


class AssignmentTest(unittest.TestCase):
    def item(self, title, track):
        return Item(
            title=title,
            track=track,
            mb_trackid="",
            mb_albumid="",
            mb_artistid="",
        )

    def test_reorder_when_track_numbers_incorrect(self):
        items = []
        items.append(self.item("one", 1))
        items.append(self.item("three", 2))
        items.append(self.item("two", 3))
        trackinfo = []
        trackinfo.append(TrackInfo(title="one"))
        trackinfo.append(TrackInfo(title="two"))
        trackinfo.append(TrackInfo(title="three"))
        mapping, extra_items, extra_tracks = match.assign_items(
            items, trackinfo
        )
        self.assertEqual(extra_items, [])
        self.assertEqual(extra_tracks, [])
        self.assertEqual(
            mapping,
            {
                items[0]: trackinfo[0],
                items[1]: trackinfo[2],
                items[2]: trackinfo[1],
            },
        )

    def test_order_works_with_invalid_track_numbers(self):
        items = []
        items.append(self.item("one", 1))
        items.append(self.item("three", 1))
        items.append(self.item("two", 1))
        trackinfo = []
        trackinfo.append(TrackInfo(title="one"))
        trackinfo.append(TrackInfo(title="two"))
        trackinfo.append(TrackInfo(title="three"))
        mapping, extra_items, extra_tracks = match.assign_items(
            items, trackinfo
        )
        self.assertEqual(extra_items, [])
        self.assertEqual(extra_tracks, [])
        self.assertEqual(
            mapping,
            {
                items[0]: trackinfo[0],
                items[1]: trackinfo[2],
                items[2]: trackinfo[1],
            },
        )

    def test_order_works_with_missing_tracks(self):
        items = []
        items.append(self.item("one", 1))
        items.append(self.item("three", 3))
        trackinfo = []
        trackinfo.append(TrackInfo(title="one"))
        trackinfo.append(TrackInfo(title="two"))
        trackinfo.append(TrackInfo(title="three"))
        mapping, extra_items, extra_tracks = match.assign_items(
            items, trackinfo
        )
        self.assertEqual(extra_items, [])
        self.assertEqual(extra_tracks, [trackinfo[1]])
        self.assertEqual(
            mapping,
            {
                items[0]: trackinfo[0],
                items[1]: trackinfo[2],
            },
        )

    def test_order_works_with_extra_tracks(self):
        items = []
        items.append(self.item("one", 1))
        items.append(self.item("two", 2))
        items.append(self.item("three", 3))
        trackinfo = []
        trackinfo.append(TrackInfo(title="one"))
        trackinfo.append(TrackInfo(title="three"))
        mapping, extra_items, extra_tracks = match.assign_items(
            items, trackinfo
        )
        self.assertEqual(extra_items, [items[1]])
        self.assertEqual(extra_tracks, [])
        self.assertEqual(
            mapping,
            {
                items[0]: trackinfo[0],
                items[2]: trackinfo[1],
            },
        )

    def test_order_works_when_track_names_are_entirely_wrong(self):
        # A real-world test case contributed by a user.
        def item(i, length):
            return Item(
                artist="ben harper",
                album="burn to shine",
                title=f"ben harper - Burn to Shine {i}",
                track=i,
                length=length,
                mb_trackid="",
                mb_albumid="",
                mb_artistid="",
            )

        items = []
        items.append(item(1, 241.37243007106997))
        items.append(item(2, 342.27781704375036))
        items.append(item(3, 245.95070222338137))
        items.append(item(4, 472.87662515485437))
        items.append(item(5, 279.1759535763187))
        items.append(item(6, 270.33333768012))
        items.append(item(7, 247.83435613222923))
        items.append(item(8, 216.54504531525072))
        items.append(item(9, 225.72775379800484))
        items.append(item(10, 317.7643606963552))
        items.append(item(11, 243.57001238834192))
        items.append(item(12, 186.45916150485752))

        def info(index, title, length):
            return TrackInfo(title=title, length=length, index=index)

        trackinfo = []
        trackinfo.append(info(1, "Alone", 238.893))
        trackinfo.append(info(2, "The Woman in You", 341.44))
        trackinfo.append(info(3, "Less", 245.59999999999999))
        trackinfo.append(info(4, "Two Hands of a Prayer", 470.49299999999999))
        trackinfo.append(info(5, "Please Bleed", 277.86599999999999))
        trackinfo.append(info(6, "Suzie Blue", 269.30599999999998))
        trackinfo.append(info(7, "Steal My Kisses", 245.36000000000001))
        trackinfo.append(info(8, "Burn to Shine", 214.90600000000001))
        trackinfo.append(info(9, "Show Me a Little Shame", 224.0929999999999))
        trackinfo.append(info(10, "Forgiven", 317.19999999999999))
        trackinfo.append(info(11, "Beloved One", 243.733))
        trackinfo.append(info(12, "In the Lord's Arms", 186.13300000000001))

        mapping, extra_items, extra_tracks = match.assign_items(
            items, trackinfo
        )
        self.assertEqual(extra_items, [])
        self.assertEqual(extra_tracks, [])
        for item, info in mapping.items():
            self.assertEqual(items.index(item), trackinfo.index(info))


class ApplyTestUtil:
    def _apply(self, info=None, per_disc_numbering=False, artist_credit=False):
        info = info or self.info
        mapping = {}
        for i, t in zip(self.items, info.tracks):
            mapping[i] = t
        config["per_disc_numbering"] = per_disc_numbering
        config["artist_credit"] = artist_credit
        autotag.apply_metadata(info, mapping)


class ApplyTest(_common.TestCase, ApplyTestUtil):
    def setUp(self):
        super().setUp()

        self.items = []
        self.items.append(Item({}))
        self.items.append(Item({}))
        trackinfo = []
        trackinfo.append(
            TrackInfo(
                title="oneNew",
                track_id="dfa939ec-118c-4d0f-84a0-60f3d1e6522c",
                medium=1,
                medium_index=1,
                medium_total=1,
                index=1,
                artist_credit="trackArtistCredit",
                artists_credit=["trackArtistCredit"],
                artist_sort="trackArtistSort",
                artists_sort=["trackArtistSort"],
            )
        )
        trackinfo.append(
            TrackInfo(
                title="twoNew",
                track_id="40130ed1-a27c-42fd-a328-1ebefb6caef4",
                medium=2,
                medium_index=1,
                index=2,
                medium_total=1,
            )
        )
        self.info = AlbumInfo(
            tracks=trackinfo,
            artist="artistNew",
            artists=["artistNew", "artistNew2"],
            album="albumNew",
            album_id="7edb51cb-77d6-4416-a23c-3a8c2994a2c7",
            artist_id="a6623d39-2d8e-4f70-8242-0a9553b91e50",
            artists_ids=[
                "a6623d39-2d8e-4f70-8242-0a9553b91e50",
                "a6623d39-2d8e-4f70-8242-0a9553b91e51",
            ],
            artist_credit="albumArtistCredit",
            artists_credit=["albumArtistCredit", "albumArtistCredit2"],
            artist_sort="albumArtistSort",
            artists_sort=["albumArtistSort", "albumArtistSort2"],
            albumtype="album",
            va=False,
            mediums=2,
        )

    def test_titles_applied(self):
        self._apply()
        self.assertEqual(self.items[0].title, "oneNew")
        self.assertEqual(self.items[1].title, "twoNew")

    def test_album_and_artist_applied_to_all(self):
        self._apply()
        self.assertEqual(self.items[0].album, "albumNew")
        self.assertEqual(self.items[1].album, "albumNew")
        self.assertEqual(self.items[0].artist, "artistNew")
        self.assertEqual(self.items[1].artist, "artistNew")
        self.assertEqual(self.items[0].artists, ["artistNew", "artistNew2"])
        self.assertEqual(self.items[1].artists, ["artistNew", "artistNew2"])
        self.assertEqual(
            self.items[0].albumartists, ["artistNew", "artistNew2"]
        )
        self.assertEqual(
            self.items[1].albumartists, ["artistNew", "artistNew2"]
        )

    def test_track_index_applied(self):
        self._apply()
        self.assertEqual(self.items[0].track, 1)
        self.assertEqual(self.items[1].track, 2)

    def test_track_total_applied(self):
        self._apply()
        self.assertEqual(self.items[0].tracktotal, 2)
        self.assertEqual(self.items[1].tracktotal, 2)

    def test_disc_index_applied(self):
        self._apply()
        self.assertEqual(self.items[0].disc, 1)
        self.assertEqual(self.items[1].disc, 2)

    def test_disc_total_applied(self):
        self._apply()
        self.assertEqual(self.items[0].disctotal, 2)
        self.assertEqual(self.items[1].disctotal, 2)

    def test_per_disc_numbering(self):
        self._apply(per_disc_numbering=True)
        self.assertEqual(self.items[0].track, 1)
        self.assertEqual(self.items[1].track, 1)

    def test_per_disc_numbering_track_total(self):
        self._apply(per_disc_numbering=True)
        self.assertEqual(self.items[0].tracktotal, 1)
        self.assertEqual(self.items[1].tracktotal, 1)

    def test_artist_credit(self):
        self._apply(artist_credit=True)
        self.assertEqual(self.items[0].artist, "trackArtistCredit")
        self.assertEqual(self.items[1].artist, "albumArtistCredit")
        self.assertEqual(self.items[0].albumartist, "albumArtistCredit")
        self.assertEqual(self.items[1].albumartist, "albumArtistCredit")
        self.assertEqual(
            self.items[0].albumartists,
            ["albumArtistCredit", "albumArtistCredit2"],
        )
        self.assertEqual(
            self.items[1].albumartists,
            ["albumArtistCredit", "albumArtistCredit2"],
        )

    def test_artist_credit_prefers_artist_over_albumartist_credit(self):
        self.info.tracks[0].artist = "oldArtist"
        self.info.tracks[0].artist_credit = None
        self._apply(artist_credit=True)
        self.assertEqual(self.items[0].artist, "oldArtist")

    def test_artist_credit_falls_back_to_albumartist(self):
        self.info.artist_credit = None
        self._apply(artist_credit=True)
        self.assertEqual(self.items[1].artist, "artistNew")

    def test_mb_trackid_applied(self):
        self._apply()
        self.assertEqual(
            self.items[0].mb_trackid, "dfa939ec-118c-4d0f-84a0-60f3d1e6522c"
        )
        self.assertEqual(
            self.items[1].mb_trackid, "40130ed1-a27c-42fd-a328-1ebefb6caef4"
        )

    def test_mb_albumid_and_artistid_applied(self):
        self._apply()
        for item in self.items:
            self.assertEqual(
                item.mb_albumid, "7edb51cb-77d6-4416-a23c-3a8c2994a2c7"
            )
            self.assertEqual(
                item.mb_artistid, "a6623d39-2d8e-4f70-8242-0a9553b91e50"
            )
            self.assertEqual(
                item.mb_artistids,
                [
                    "a6623d39-2d8e-4f70-8242-0a9553b91e50",
                    "a6623d39-2d8e-4f70-8242-0a9553b91e51",
                ],
            )

    def test_albumtype_applied(self):
        self._apply()
        self.assertEqual(self.items[0].albumtype, "album")
        self.assertEqual(self.items[1].albumtype, "album")

    def test_album_artist_overrides_empty_track_artist(self):
        my_info = self.info.copy()
        self._apply(info=my_info)
        self.assertEqual(self.items[0].artist, "artistNew")
        self.assertEqual(self.items[1].artist, "artistNew")
        self.assertEqual(self.items[0].artists, ["artistNew", "artistNew2"])
        self.assertEqual(self.items[1].artists, ["artistNew", "artistNew2"])

    def test_album_artist_overridden_by_nonempty_track_artist(self):
        my_info = self.info.copy()
        my_info.tracks[0].artist = "artist1!"
        my_info.tracks[1].artist = "artist2!"
        my_info.tracks[0].artists = ["artist1!", "artist1!!"]
        my_info.tracks[1].artists = ["artist2!", "artist2!!"]
        self._apply(info=my_info)
        self.assertEqual(self.items[0].artist, "artist1!")
        self.assertEqual(self.items[1].artist, "artist2!")
        self.assertEqual(self.items[0].artists, ["artist1!", "artist1!!"])
        self.assertEqual(self.items[1].artists, ["artist2!", "artist2!!"])

    def test_artist_credit_applied(self):
        self._apply()
        self.assertEqual(self.items[0].albumartist_credit, "albumArtistCredit")
        self.assertEqual(
            self.items[0].albumartists_credit,
            ["albumArtistCredit", "albumArtistCredit2"],
        )
        self.assertEqual(self.items[0].artist_credit, "trackArtistCredit")
        self.assertEqual(self.items[0].artists_credit, ["trackArtistCredit"])
        self.assertEqual(self.items[1].albumartist_credit, "albumArtistCredit")
        self.assertEqual(
            self.items[1].albumartists_credit,
            ["albumArtistCredit", "albumArtistCredit2"],
        )
        self.assertEqual(self.items[1].artist_credit, "albumArtistCredit")
        self.assertEqual(
            self.items[1].artists_credit,
            ["albumArtistCredit", "albumArtistCredit2"],
        )

    def test_artist_sort_applied(self):
        self._apply()
        self.assertEqual(self.items[0].albumartist_sort, "albumArtistSort")
        self.assertEqual(
            self.items[0].albumartists_sort,
            ["albumArtistSort", "albumArtistSort2"],
        )
        self.assertEqual(self.items[0].artist_sort, "trackArtistSort")
        self.assertEqual(self.items[0].artists_sort, ["trackArtistSort"])
        self.assertEqual(self.items[1].albumartist_sort, "albumArtistSort")
        self.assertEqual(
            self.items[1].albumartists_sort,
            ["albumArtistSort", "albumArtistSort2"],
        )
        self.assertEqual(self.items[1].artist_sort, "albumArtistSort")
        self.assertEqual(
            self.items[1].artists_sort, ["albumArtistSort", "albumArtistSort2"]
        )

    def test_full_date_applied(self):
        my_info = self.info.copy()
        my_info.year = 2013
        my_info.month = 12
        my_info.day = 18
        self._apply(info=my_info)

        self.assertEqual(self.items[0].year, 2013)
        self.assertEqual(self.items[0].month, 12)
        self.assertEqual(self.items[0].day, 18)

    def test_date_only_zeros_month_and_day(self):
        self.items = []
        self.items.append(Item(year=1, month=2, day=3))
        self.items.append(Item(year=4, month=5, day=6))

        my_info = self.info.copy()
        my_info.year = 2013
        self._apply(info=my_info)

        self.assertEqual(self.items[0].year, 2013)
        self.assertEqual(self.items[0].month, 0)
        self.assertEqual(self.items[0].day, 0)

    def test_missing_date_applies_nothing(self):
        self.items = []
        self.items.append(Item(year=1, month=2, day=3))
        self.items.append(Item(year=4, month=5, day=6))

        self._apply()

        self.assertEqual(self.items[0].year, 1)
        self.assertEqual(self.items[0].month, 2)
        self.assertEqual(self.items[0].day, 3)

    def test_data_source_applied(self):
        my_info = self.info.copy()
        my_info.data_source = "MusicBrainz"
        self._apply(info=my_info)

        self.assertEqual(self.items[0].data_source, "MusicBrainz")


class ApplyCompilationTest(_common.TestCase, ApplyTestUtil):
    def setUp(self):
        super().setUp()

        self.items = []
        self.items.append(Item({}))
        self.items.append(Item({}))
        trackinfo = []
        trackinfo.append(
            TrackInfo(
                title="oneNew",
                track_id="dfa939ec-118c-4d0f-84a0-60f3d1e6522c",
                artist="artistOneNew",
                artist_id="a05686fc-9db2-4c23-b99e-77f5db3e5282",
                index=1,
            )
        )
        trackinfo.append(
            TrackInfo(
                title="twoNew",
                track_id="40130ed1-a27c-42fd-a328-1ebefb6caef4",
                artist="artistTwoNew",
                artist_id="80b3cf5e-18fe-4c59-98c7-e5bb87210710",
                index=2,
            )
        )
        self.info = AlbumInfo(
            tracks=trackinfo,
            artist="variousNew",
            album="albumNew",
            album_id="3b69ea40-39b8-487f-8818-04b6eff8c21a",
            artist_id="89ad4ac3-39f7-470e-963a-56509c546377",
            albumtype="compilation",
        )

    def test_album_and_track_artists_separate(self):
        self._apply()
        self.assertEqual(self.items[0].artist, "artistOneNew")
        self.assertEqual(self.items[1].artist, "artistTwoNew")
        self.assertEqual(self.items[0].albumartist, "variousNew")
        self.assertEqual(self.items[1].albumartist, "variousNew")

    def test_mb_albumartistid_applied(self):
        self._apply()
        self.assertEqual(
            self.items[0].mb_albumartistid,
            "89ad4ac3-39f7-470e-963a-56509c546377",
        )
        self.assertEqual(
            self.items[1].mb_albumartistid,
            "89ad4ac3-39f7-470e-963a-56509c546377",
        )
        self.assertEqual(
            self.items[0].mb_artistid, "a05686fc-9db2-4c23-b99e-77f5db3e5282"
        )
        self.assertEqual(
            self.items[1].mb_artistid, "80b3cf5e-18fe-4c59-98c7-e5bb87210710"
        )

    def test_va_flag_cleared_does_not_set_comp(self):
        self._apply()
        self.assertFalse(self.items[0].comp)
        self.assertFalse(self.items[1].comp)

    def test_va_flag_sets_comp(self):
        va_info = self.info.copy()
        va_info.va = True
        self._apply(info=va_info)
        self.assertTrue(self.items[0].comp)
        self.assertTrue(self.items[1].comp)


class StringDistanceTest(unittest.TestCase):
    def test_equal_strings(self):
        dist = string_dist("Some String", "Some String")
        self.assertEqual(dist, 0.0)

    def test_different_strings(self):
        dist = string_dist("Some String", "Totally Different")
        self.assertNotEqual(dist, 0.0)

    def test_punctuation_ignored(self):
        dist = string_dist("Some String", "Some.String!")
        self.assertEqual(dist, 0.0)

    def test_case_ignored(self):
        dist = string_dist("Some String", "sOME sTring")
        self.assertEqual(dist, 0.0)

    def test_leading_the_has_lower_weight(self):
        dist1 = string_dist("XXX Band Name", "Band Name")
        dist2 = string_dist("The Band Name", "Band Name")
        self.assertLess(dist2, dist1)

    def test_parens_have_lower_weight(self):
        dist1 = string_dist("One .Two.", "One")
        dist2 = string_dist("One (Two)", "One")
        self.assertLess(dist2, dist1)

    def test_brackets_have_lower_weight(self):
        dist1 = string_dist("One .Two.", "One")
        dist2 = string_dist("One [Two]", "One")
        self.assertLess(dist2, dist1)

    def test_ep_label_has_zero_weight(self):
        dist = string_dist("My Song (EP)", "My Song")
        self.assertEqual(dist, 0.0)

    def test_featured_has_lower_weight(self):
        dist1 = string_dist("My Song blah Someone", "My Song")
        dist2 = string_dist("My Song feat Someone", "My Song")
        self.assertLess(dist2, dist1)

    def test_postfix_the(self):
        dist = string_dist("The Song Title", "Song Title, The")
        self.assertEqual(dist, 0.0)

    def test_postfix_a(self):
        dist = string_dist("A Song Title", "Song Title, A")
        self.assertEqual(dist, 0.0)

    def test_postfix_an(self):
        dist = string_dist("An Album Title", "Album Title, An")
        self.assertEqual(dist, 0.0)

    def test_empty_strings(self):
        dist = string_dist("", "")
        self.assertEqual(dist, 0.0)

    def test_solo_pattern(self):
        # Just make sure these don't crash.
        string_dist("The ", "")
        string_dist("(EP)", "(EP)")
        string_dist(", An", "")

    def test_heuristic_does_not_harm_distance(self):
        dist = string_dist("Untitled", "[Untitled]")
        self.assertEqual(dist, 0.0)

    def test_ampersand_expansion(self):
        dist = string_dist("And", "&")
        self.assertEqual(dist, 0.0)

    def test_accented_characters(self):
        dist = string_dist("\xe9\xe1\xf1", "ean")
        self.assertEqual(dist, 0.0)


class EnumTest(_common.TestCase):
    """
    Test Enum Subclasses defined in beets.util.enumeration
    """

    def test_ordered_enum(self):
        OrderedEnumClass = match.OrderedEnum(  # noqa
            "OrderedEnumTest", ["a", "b", "c"]
        )
        self.assertLess(OrderedEnumClass.a, OrderedEnumClass.b)
        self.assertLess(OrderedEnumClass.a, OrderedEnumClass.c)
        self.assertLess(OrderedEnumClass.b, OrderedEnumClass.c)
        self.assertGreater(OrderedEnumClass.b, OrderedEnumClass.a)
        self.assertGreater(OrderedEnumClass.c, OrderedEnumClass.a)
        self.assertGreater(OrderedEnumClass.c, OrderedEnumClass.b)


def suite():
    return unittest.TestLoader().loadTestsFromName(__name__)


if __name__ == "__main__":
    unittest.main(defaultTest="suite")
