import datetime as dt
import os

import mutagen
import pytest

import symuid

# pylint: disable=redefined-outer-name

# TODO test aac / m4a itunes tags

TRACKS_DIR_PATH = os.path.join(os.path.dirname(__file__), 'tracks')


def utc_dt(hour=0):
    return dt.datetime(2018, 9, 26, hour, tzinfo=dt.timezone.utc)


@pytest.fixture
def empty_id3_track(empty_id3_path):
    return symuid.Track(empty_id3_path)


@pytest.mark.parametrize('path', [
    os.path.join(TRACKS_DIR_PATH, 'id3v2.4-typical.mp3'),
    os.path.join(TRACKS_DIR_PATH, 'id3v2.4-empty.mp3'),
])
def test_init(path):
    symuid.Track(path)


@pytest.mark.parametrize(('path', 'expected_comment'), [
    (os.path.join(TRACKS_DIR_PATH, 'id3v2.4-typical.mp3'), 'some comment'),
    (os.path.join(TRACKS_DIR_PATH, 'id3v2.4-empty.mp3'), None),
])
def test_get_comment(path, expected_comment):
    track = symuid.Track(path)
    assert expected_comment == track.comment


def test_set_comment(empty_id3_track):
    assert empty_id3_track.comment is None
    empty_id3_track.comment = 'note'
    assert empty_id3_track.comment == 'note'
    empty_id3_track.comment += 's'
    assert empty_id3_track.comment == 'notes'
    assert symuid.Track(empty_id3_track.path).comment == 'notes'


@pytest.mark.parametrize(('play_count'), [
    symuid.PlayCount('pytest', 'lib', utc_dt(), 7),
])
def test_register_play_count(empty_id3_track, play_count):
    empty_id3_track.register_play_count(play_count)
    tags = mutagen.File(empty_id3_track.path).tags
    assert len(tags) == 1
    expected_desc = 'symuid:pcnt:{}:{}:{}'.format(
        play_count.player, play_count.library_id, int(
            play_count.register_dt.timestamp()),
    )
    tag = tags['TXXX:' + expected_desc]
    assert tag.desc == expected_desc
    assert tag.text == [str(play_count.count)]


@pytest.mark.parametrize(('expected_counts'), [
    [],
    [symuid.PlayCount('player', 'lib', utc_dt(), 3)],
    [symuid.PlayCount('a', '0', utc_dt(0), 1),
     symuid.PlayCount('b', '1', utc_dt(1), 2)],
    [symuid.PlayCount('a', '0', utc_dt(0), 1),
     symuid.PlayCount('a', '2', utc_dt(1), 2),
     symuid.PlayCount('b', '3', utc_dt(3), 3)],
])
def test__get_play_counts_all(empty_id3_track, expected_counts):
    for play_count in expected_counts:
        empty_id3_track.register_play_count(play_count)
    assert expected_counts == list(empty_id3_track._get_play_counts())


def test__get_play_counts_filtered(empty_id3_track):
    counts = [symuid.PlayCount('a', '0', utc_dt(0), 1),
              symuid.PlayCount('a', '0', utc_dt(1), 2),
              symuid.PlayCount('a', '1', utc_dt(0), 3),
              symuid.PlayCount('b', '2', utc_dt(1), 4)]
    for play_count in counts:
        empty_id3_track.register_play_count(play_count)
    assert set(empty_id3_track._get_play_counts(player='a')) \
        == set(filter(lambda pc: pc.player == 'a', counts))
    assert set(empty_id3_track._get_play_counts(player='b')) \
        == set(filter(lambda pc: pc.player == 'b', counts))
    assert set(empty_id3_track._get_play_counts(player='a', library_id='0')) \
        == set(filter(lambda pc: pc.library_id == '0', counts))
    assert set(empty_id3_track._get_play_counts(player='a', library_id='2')) \
        == set()


def test__get_latest_play_counts(empty_id3_track):
    counts = [symuid.PlayCount('a', '0', utc_dt(0), 1),
              symuid.PlayCount('a', '0', utc_dt(1), 2),
              symuid.PlayCount('a', '1', utc_dt(0), 3),
              symuid.PlayCount('a', '1', utc_dt(2), 4),
              symuid.PlayCount('b', '2', utc_dt(3), 5)]
    for play_count in counts:
        empty_id3_track.register_play_count(play_count)
    assert set(empty_id3_track._get_latest_play_counts()) \
        == set([counts[1], counts[3], counts[4]])
    assert set(empty_id3_track._get_latest_play_counts(player='a')) \
        == set([counts[1], counts[3]])
    assert set(empty_id3_track._get_latest_play_counts(player='a', library_id='0')) \
        == set([counts[1]])


def test_get_play_count_sum(empty_id3_track):
    counts = [symuid.PlayCount('a', '0', utc_dt(0), 1),
              symuid.PlayCount('a', '0', utc_dt(1), 2),
              symuid.PlayCount('a', '1', utc_dt(0), 3),
              symuid.PlayCount('a', '1', utc_dt(2), 4),
              symuid.PlayCount('b', '2', utc_dt(3), 5)]
    for play_count in counts:
        empty_id3_track.register_play_count(play_count)
    assert 2 + 4 + 5 == empty_id3_track.get_play_count_sum()


def test_increase_play_count(empty_id3_track):
    init_count = symuid.PlayCount('a', '0', utc_dt(0), 3)
    empty_id3_track.register_play_count(init_count)
    assert empty_id3_track.get_play_count_sum() == 3
    empty_id3_track.increase_play_count('a', '0')
    dt_now = symuid._utc_dt_now()
    assert empty_id3_track.get_play_count_sum() == 4
    counts = set(empty_id3_track._get_play_counts())
    assert len(counts) == 2
    counts.remove(init_count)
    new_count = counts.pop()
    assert new_count.player == 'a'
    assert new_count.library_id == '0'
    assert abs(new_count.register_dt - dt_now).total_seconds() < 5
    assert new_count.count == 4


def test_increase_play_count_init(empty_id3_track):
    empty_id3_track.increase_play_count('a', '0')
    assert empty_id3_track.get_play_count_sum() == 1
    count, = empty_id3_track._get_play_counts()
    assert count.player == 'a'
    assert count.library_id == '0'
    assert abs(count.register_dt - symuid._utc_dt_now()).total_seconds() < 5
    assert count.count == 1


def test_increase_play_count_others(empty_id3_track):
    empty_id3_track.register_play_count(
        symuid.PlayCount('a', '0', utc_dt(0), 1),
    )
    empty_id3_track.register_play_count(
        symuid.PlayCount('a', '1', utc_dt(0), 2),
    )
    empty_id3_track.register_play_count(
        symuid.PlayCount('b', '0', utc_dt(0), 3),
    )
    assert empty_id3_track.get_play_count_sum() == 6
    empty_id3_track.increase_play_count('a', '1')
    assert empty_id3_track.get_play_count_sum() == 7
    assert len(list(empty_id3_track._get_play_counts(player='b'))) == 1
    assert len(list(
        empty_id3_track._get_play_counts(player='a', library_id='0')
    )) == 1
    assert len(list(
        empty_id3_track._get_play_counts(player='a', library_id='1')
    )) == 2