import pygame
from common import SingletonMeta


class BackgroundSound(pygame.mixer.Sound, metaclass=SingletonMeta):
    def __init__(self, filename):
        super().__init__(filename)
        self.set_volume(0.5)
        self._muted = False
        self._played = False

    def play(self):
        if not self._played:
            super().play(loops=-1)
            self._played = True

    def mute(self):
        self._muted = True
        self.set_volume(0)

    def unmute(self):
        self._muted = False
        self.set_volume(0.5)

    @property
    def muted(self):
        return self._muted

    @muted.setter
    def muted(self, value):
        if value:
            self.mute()
        else:
            self.unmute()

    def toggle_mute(self):
        self.muted = not self.muted