# Copyright 2014 Nick Boultbee
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.

from gi.repository import Gtk, GLib
import re
import time
from quodlibet.ext.songsmenu.replaygain import UpdateMode, RGDialog, ReplayGainPipeline
from quodlibet.formats import MusicFile
from quodlibet.formats import AudioFile

from tests.plugin import PluginTestCase
from tests import get_data_path, TestCase


class TReplayGain(PluginTestCase):
    # Give up analysis after some time, in case GStreamer dies.
    TIMEOUT = 20

    @classmethod
    def setUpClass(cls):
        cls.mod = cls.modules["ReplayGain"]
        cls.kind = cls.plugins["ReplayGain"].cls

    @classmethod
    def tearDownClass(cls):
        del cls.mod
        del cls.kind

    def setUp(self):
        self.song = AudioFile({"artist": "foo", "album": "the album"})
        self.plugin = self.kind([self.song], None)

    def tearDown(self):
        self.plugin.destroy()
        del self.plugin
        del self.song

    def test_RGSong_properties(self):
        rgs = self.mod.RGSong(self.song)
        assert not rgs.has_album_tags
        assert not rgs.has_track_tags
        assert not rgs.has_all_rg_tags

        rgs.done = True
        rgs._write(-1.23, 0.99)
        assert rgs.has_album_tags, "Didn't write album tags"
        assert not rgs.has_track_tags
        assert not rgs.has_all_rg_tags

    def test_RGSong_zero(self):
        rgs = self.mod.RGSong(self.song)
        rgs.done = True
        rgs._write(0.0, 0.0)
        self.assertTrue(rgs.has_album_tags, msg=f"Failed with 0.0 album tags ({rgs})")

    def test_RGAlbum_properties(self):
        rga = self.mod.RGAlbum([self.mod.RGSong(self.song)], UpdateMode.ALWAYS)
        assert not rga.done
        self.assertEqual(rga.title, "foo - the album")

    def test_delete_bs1770gain(self):
        tags = [
            "replaygain_reference_loudness",
            "replaygain_algorithm",
            "replaygain_album_range",
            "replaygain_track_range",
        ]

        for tag in tags:
            self.song[tag] = "foo"

        rgs = self.mod.RGSong(self.song)
        rgs.done = True
        rgs._write(0.0, 0.0)

        for tag in tags:
            assert not self.song(tag)

    def _analyse_song(self, song):
        mode = self.mod.UpdateMode.ALWAYS
        self.album = album = self.mod.RGAlbum.from_songs([song], mode)
        self.analysed = None

        def _run_main_loop():
            def on_complete(pipeline, album):
                album.write()
                self.analysed = [album]

            pipeline = self.mod.ReplayGainPipeline()
            sig = pipeline.connect("done", on_complete)

            pipeline.start(album)
            start = time.time()
            while not self.analysed and abs(time.time() - start) < self.TIMEOUT:
                Gtk.main_iteration_do(False)
            pipeline.quit()
            pipeline.disconnect(sig)

        _run_main_loop()
        assert self.analysed, "Timed out"

    def test_analyze_sinewave(self):
        song = MusicFile(get_data_path("sine-110hz.flac"))
        self.assertEqual(song("~#length"), 2)
        assert not song("~replaygain_track_gain")

        self._analyse_song(song)

        self.assertAlmostEqual(
            song("~#replaygain_track_peak"), 1.0, msg="Track peak should be 1.0"
        )

        track_gain = song("~#replaygain_track_gain")
        assert track_gain, "No Track Gain added"
        assert re.match(r"\-[0-9]\.[0-9]{1,2}", str(track_gain))

        # For one-song album, track == album
        self.assertEqual(track_gain, song("~#replaygain_album_gain"))

    def test_analyze_silence(self):
        song = MusicFile(get_data_path("silence-44-s.ogg"))
        assert not song("~replaygain_track_gain")

        self._analyse_song(song)

        self.assertAlmostEqual(
            song("~#replaygain_track_peak"), 0.0, msg="Track peak should be 0.0"
        )

        track_gain = song("~#replaygain_track_gain")
        assert track_gain, "No Track Gain added"

        # For one-song album, track == album
        self.assertEqual(track_gain, song("~#replaygain_album_gain"))


class FakePipeline(ReplayGainPipeline):
    def __init__(self):
        super().__init__()
        self.started = []

    def quit(self):
        pass

    def _setup_pipe(self):
        pass

    def start(self, album):
        self.started.append(album)
        super().start(album)

    def _next_song(self, first=False):
        GLib.idle_add(self._emit)

    def _emit(self):
        self.emit("done", self._album)


class FakeRGDialog(RGDialog):
    def create_pipelines(self):
        self.pipes = [FakePipeline(), FakePipeline()]


class TRGDialog(TestCase):
    def test_some_songs_needing_update(self):
        songs = [[a_song(x)] for x in range(8)]
        d = FakeRGDialog(songs, None, UpdateMode.ALBUM_MISSING)
        d.start_analysis()
        self.run_main_loop()
        d.destroy()
        # One should have got half of the albums needing update (and no more)
        self.assertEqual(self.track_nums_from(d.pipes[0].started), [0, 4])
        # And the other processor should get the other half
        self.assertEqual(self.track_nums_from(d.pipes[1].started), [2, 6])

    def run_main_loop(self, timeout=0.25):
        start = time.time()
        while abs(time.time() - start) < timeout:
            Gtk.main_iteration_do(False)

    def track_nums_from(self, album):
        return [s.songs[0].song("~#tracknumber") for s in album]


def a_song(n):
    d = {"replaygain_album_gain": -6.0} if n % 2 else {}
    d["tracknumber"] = n
    return AudioFile(d)
