import os
import builtins

from spotdl import const
from spotdl import internals
from spotdl import spotify_tools
from spotdl import youtube_tools
from spotdl import downloader

import loader
import pytest

loader.load_defaults()

YT_API_KEY = "AIzaSyAnItl3udec-Q1d5bkjKJGL-RgrKO_vU90"

TRACK_SEARCH = "Tony's Videos VERY SHORT VIDEO 28.10.2016"
EXPECTED_TITLE = TRACK_SEARCH
EXPECTED_YT_URL = "http://youtube.com/watch?v=qOOcy2-tmbk"

RESULT_COUNT_SEARCH = "she is still sleeping SAO"

EXPECTED_YT_API_KEY = "AIzaSyC6cEeKlxtOPybk9sEe5ksFN5sB-7wzYp0"
EXPECTED_YT_API_KEY_CUSTOM = "some_api_key"


class TestYouTubeAPIKeys:
    def test_custom(self):
        const.args.youtube_api_key = EXPECTED_YT_API_KEY_CUSTOM
        youtube_tools.set_api_key()
        key = youtube_tools.pafy.g.api_key
        assert key == EXPECTED_YT_API_KEY_CUSTOM

    def test_default(self):
        const.args.youtube_api_key = None
        youtube_tools.set_api_key()
        key = youtube_tools.pafy.g.api_key
        assert key == EXPECTED_YT_API_KEY


@pytest.fixture(scope="module")
def metadata_fixture():
    metadata = spotify_tools.generate_metadata(TRACK_SEARCH)
    return metadata


def test_metadata(metadata_fixture):
    expect_metadata = None
    assert metadata_fixture == expect_metadata


class TestArgsManualResultCount:
    # Regresson test for issue #264
    def test_scrape(self):
        const.args.manual = True
        url = youtube_tools.GenerateYouTubeURL(RESULT_COUNT_SEARCH, meta_tags=None)
        video_ids = url.scrape(bestmatch=False)
        # Web scraping gives us all videos on the 1st page
        assert len(video_ids) == 20

    def test_api(self):
        url = youtube_tools.GenerateYouTubeURL(RESULT_COUNT_SEARCH, meta_tags=None)
        video_ids = url.api(bestmatch=False)
        const.args.manual = False
        # API gives us 50 videos (or as requested)
        assert len(video_ids) == 50


class TestYouTubeURL:
    def test_only_music_category(self, metadata_fixture):
        const.args.music_videos_only = True
        url = youtube_tools.generate_youtube_url(TRACK_SEARCH, metadata_fixture)
        assert url == EXPECTED_YT_URL

    def test_all_categories(self, metadata_fixture):
        const.args.music_videos_only = False
        url = youtube_tools.generate_youtube_url(TRACK_SEARCH, metadata_fixture)
        assert url == EXPECTED_YT_URL

    def test_args_manual(self, metadata_fixture, monkeypatch):
        const.args.manual = True
        monkeypatch.setattr("builtins.input", lambda x: "1")
        url = youtube_tools.generate_youtube_url(TRACK_SEARCH, metadata_fixture)
        assert url == EXPECTED_YT_URL

    def test_args_manual_none(self, metadata_fixture, monkeypatch):
        expect_url = None
        monkeypatch.setattr("builtins.input", lambda x: "0")
        url = youtube_tools.generate_youtube_url(TRACK_SEARCH, metadata_fixture)
        const.args.manual = False
        assert url == expect_url


@pytest.fixture(scope="module")
def content_fixture(metadata_fixture):
    content = youtube_tools.go_pafy(TRACK_SEARCH, metadata_fixture)
    return content


# True = Metadata must be fetched from Spotify
# False = Metadata must be fetched from YouTube
# None = Metadata must be `None`

MATCH_METADATA_NO_FALLBACK_TEST_TABLE = [
    ("https://open.spotify.com/track/5nWduGwBGBn1PSqYTJUDbS", True),
    ("http://youtube.com/watch?v=3nQNiWdeH2Q", None),
    ("Linux Talk | Working with Drives and Filesystems", None),
]

MATCH_METADATA_FALLBACK_TEST_TABLE = [
    ("https://open.spotify.com/track/5nWduGwBGBn1PSqYTJUDbS", True),
    ("http://youtube.com/watch?v=3nQNiWdeH2Q", False),
    ("Linux Talk | Working with Drives and Filesystems", False),
]

MATCH_METADATA_NO_METADATA_TEST_TABLE = [
    ("https://open.spotify.com/track/5nWduGwBGBn1PSqYTJUDbS", None),
    ("http://youtube.com/watch?v=3nQNiWdeH2Q", None),
    ("Linux Talk | Working with Drives and Filesystems", None),
]


class TestMetadataOrigin:
    def match_metadata(self, track, metadata_type):
        _, metadata = youtube_tools.match_video_and_metadata(track)
        if metadata_type is None:
            assert metadata == metadata_type
        else:
            assert metadata["spotify_metadata"] == metadata_type

    @pytest.mark.parametrize(
        "track, metadata_type", MATCH_METADATA_NO_FALLBACK_TEST_TABLE
    )
    def test_match_metadata_with_no_fallback(
        self, track, metadata_type, content_fixture, monkeypatch
    ):
        monkeypatch.setattr(
            youtube_tools, "go_pafy", lambda track, meta_tags: content_fixture
        )
        const.args.no_fallback_metadata = True
        self.match_metadata(track, metadata_type)

    @pytest.mark.parametrize("track, metadata_type", MATCH_METADATA_FALLBACK_TEST_TABLE)
    def test_match_metadata_with_fallback(
        self, track, metadata_type, content_fixture, monkeypatch
    ):
        monkeypatch.setattr(
            youtube_tools, "go_pafy", lambda track, meta_tags: content_fixture
        )
        const.args.no_fallback_metadata = False
        self.match_metadata(track, metadata_type)

    @pytest.mark.parametrize(
        "track, metadata_type", MATCH_METADATA_NO_METADATA_TEST_TABLE
    )
    def test_match_metadata_with_no_metadata(
        self, track, metadata_type, content_fixture, monkeypatch
    ):
        monkeypatch.setattr(
            youtube_tools, "go_pafy", lambda track, meta_tags: content_fixture
        )
        const.args.no_metadata = True
        self.match_metadata(track, metadata_type)


@pytest.fixture(scope="module")
def title_fixture(content_fixture):
    title = youtube_tools.get_youtube_title(content_fixture)
    return title


class TestYouTubeTitle:
    def test_single_download_with_youtube_api(self, title_fixture):
        const.args.youtube_api_key = YT_API_KEY
        youtube_tools.set_api_key()
        assert title_fixture == EXPECTED_TITLE

    def test_download_from_list_without_youtube_api(
        self, metadata_fixture, content_fixture
    ):
        const.args.youtube_api_key = None
        youtube_tools.set_api_key()
        content_fixture = youtube_tools.go_pafy(TRACK_SEARCH, metadata_fixture)
        title = youtube_tools.get_youtube_title(content_fixture, 1)
        assert title == "1. {0}".format(EXPECTED_TITLE)


@pytest.fixture(scope="module")
def filename_fixture(title_fixture):
    filename = internals.sanitize_title(title_fixture)
    return filename


def test_check_exists(metadata_fixture, filename_fixture, tmpdir):
    expect_check = False
    const.args.folder = str(tmpdir)
    # prerequisites for determining filename
    track_existence = downloader.CheckExists(filename_fixture, metadata_fixture)
    check = track_existence.already_exists(TRACK_SEARCH)
    assert check == expect_check


def test_generate_m3u(tmpdir, monkeypatch):
    monkeypatch.setattr(
        youtube_tools.GenerateYouTubeURL,
        "_fetch_response",
        loader.monkeypatch_youtube_search_page,
    )
    expect_m3u = (
        "#EXTM3U\n\n"
        "#EXTINF:208,Janji - Heroes Tonight (feat. Johnning) [NCS Release]\n"
        "http://www.youtube.com/watch?v=3nQNiWdeH2Q\n"
        "#EXTINF:226,Alan Walker - Spectre [NCS Release]\n"
        "http://www.youtube.com/watch?v=AOeY-nDp7hI\n"
    )
    m3u_track_file = os.path.join(str(tmpdir), "m3u_test.txt")
    with open(m3u_track_file, "w") as track_file:
        track_file.write("\nhttps://open.spotify.com/track/3SipFlNddvL0XNZRLXvdZD")
        track_file.write("\nhttp://www.youtube.com/watch?v=AOeY-nDp7hI")
    youtube_tools.generate_m3u(m3u_track_file)
    m3u_file = "{}.m3u".format(m3u_track_file.split(".")[0])
    with open(m3u_file, "r") as m3u_in:
        m3u = m3u_in.readlines()
    assert "".join(m3u) == expect_m3u


class TestDownload:
    def test_webm(self, content_fixture, filename_fixture, monkeypatch):
        # content_fixture does not have any .webm audiostream
        expect_download = False
        monkeypatch.setattr("pafy.backend_shared.BaseStream.download", lambda x: None)
        download = youtube_tools.download_song(
            filename_fixture + ".webm", content_fixture
        )
        assert download == expect_download

    def test_other(self, content_fixture, filename_fixture, monkeypatch):
        expect_download = False
        monkeypatch.setattr("pafy.backend_shared.BaseStream.download", lambda x: None)
        download = youtube_tools.download_song(
            filename_fixture + ".fake_extension", content_fixture
        )
        assert download == expect_download