import threading
import pydub
import pygame

class MusicFile:
    def __init__(self, filename, lock):
        self.filename = filename
        self.channel = None
        self.raw_data = None
        self.sound = None

        self.loaded = False
        threading.Thread(name = "MSMusicLoad", target = self.load_sound, args = [lock]).start()

    def load_sound(self, lock):
        lock.acquire()
        print("Loading {}".format(self.filename))
        self.raw_data = pydub.AudioSegment.from_file(self.filename).raw_data
        self.sound = pygame.mixer.Sound(self.raw_data)
        print("Loaded {}".format(self.filename))
        self.loaded = True
        lock.release()

    def is_playing(self):
        return self.channel is not None and self.channel.get_busy()

    def play(self, fade_in = 0, volume = 100, start_at = 0):
        self.set_volume(volume)

        if start_at > 0:
            song_duration = self.sound.get_length()
            raw_data_length = len(self.raw_data)
            start_offset = int((raw_data_length / song_duration) * start_at)
            start_offset = start_offset - (start_offset % 2)
            self.sound = pygame.mixer.Sound(self.raw_data[start_offset:])
        else:
            self.sound = pygame.mixer.Sound(self.raw_data)

        self.channel = self.sound.play(fade_ms = fade_in * 1000)

    def pause(self):
        if self.channel is not None:
            self.channel.pause()

    def stop(self, fade_out = 0):
        self.channel = None
        if fade_out > 0:
            self.sound.fadeout(fade_out * 1000)
        else:
            self.sound.stop()

    def set_volume(self, value):
        if value < 0:
            value = 0
        if value > 100:
            value = 100
        self.sound.set_volume(value / 100)

    def wait_end(self):
        pass