import pytest

import symuid

import datetime as dt
import mutagen
import os
import shutil

# TODO test aac / m4a itunes tags

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


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


@pytest.fixture
def empty_id3_track(tmpdir):
    p = tmpdir.join('empty.mp3').strpath
    shutil.copyfile(
        src=os.path.join(TRACKS_DIR_PATH, 'id3v2.4-empty.mp3'),
        dst=p,
    )
    return symuid.Track(p)


@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(('player', 'library_id', 'register_dt', 'count'), [
    ('pytest', 'lib', dt.datetime(2018, 9, 26, 21, 16, 20, tzinfo=dt.timezone.utc), 7),
])
def test_register_play_count(empty_id3_track, player, library_id, register_dt, count):
    empty_id3_track.register_play_count(
        player=player,
        library_id=library_id,
        register_dt=register_dt,
        play_count=count,
    )
    tags = mutagen.File(empty_id3_track.path).tags
    assert len(tags) == 1
    expected_desc = 'symuid:pcnt:{}:{}:{}'.format(
        player, library_id, int(register_dt.timestamp()),
    )
    tag = tags['TXXX:' + expected_desc]
    assert tag.desc == expected_desc
    assert tag.text == [str(count)]


@pytest.mark.parametrize(('player', 'library_id', 'register_dt', 'count'), [
    ('pytest', 'lib', utc_dt(), 7),
])
def test_register_play_count(empty_id3_track, player, library_id, register_dt, count):
    empty_id3_track.register_play_count(
        player=player,
        library_id=library_id,
        register_dt=register_dt,
        play_count=count,
    )
    tags = mutagen.File(empty_id3_track.path).tags
    assert len(tags) == 1
    expected_desc = 'symuid:pcnt:{}:{}:{}'.format(
        player, library_id, int(register_dt.timestamp()),
    )
    tag = tags['TXXX:' + expected_desc]
    assert tag.desc == expected_desc
    assert tag.text == [str(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 pc in expected_counts:
        empty_id3_track.register_play_count(
            player=pc.player,
            library_id=pc.library_id,
            register_dt=pc.register_dt,
            play_count=pc.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 pc in counts:
        empty_id3_track.register_play_count(
            player=pc.player,
            library_id=pc.library_id,
            register_dt=pc.register_dt,
            play_count=pc.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 pc in counts:
        empty_id3_track.register_play_count(
            player=pc.player,
            library_id=pc.library_id,
            register_dt=pc.register_dt,
            play_count=pc.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 pc in counts:
        empty_id3_track.register_play_count(
            player=pc.player,
            library_id=pc.library_id,
            register_dt=pc.register_dt,
            play_count=pc.count,
        )
    assert 2 + 4 + 5 == empty_id3_track.get_play_count_sum()