redef class Music

	private var native: nullable MixMusic = null

	redef fun load
	do
		if not fs_path_exists then return

		# SDL2 mixer load
		var native = mix.load_mus(fs_path.to_cstring)
		if native.address_is_null then
			error = new Error("Failed to load music '{path}': {mix.error}")
			return
		end

		self.native = native
	end

	redef fun play
	do
		var native = native

		if native == null and error == null then
			# Lazy load
			load

			# Auto print errors on lazy loading only
			var error = error
			if error != null then print_error error
		end

		# If there's an error, silently skip
		if error != null then return
		native = self.native
		assert native != null

		# Play looping
		mix.play_music(native, -1)
	end

	redef fun pause do mix.pause_music

	redef fun resume do mix.resume_music
end

redef class Music

	# Resource ID of this sound
	var id: nullable Int is noinit

	# The MediaPlayer who loaded this sound
	var media_player: MediaPlayer is noinit

	private init priv_init(id: nullable Int, media_player: MediaPlayer, error: nullable Error) is nosuper do
		self.id = id
		self.media_player = media_player
		if error != null then
			self.error = error
		else
			self.is_loaded = true
		end
	end

	redef fun load do
		if is_loaded then return

		# Try resources (res)
		var rid = app.resource_manager.raw_id(path.strip_extension)
		if rid > 0 then
			var mp_sound_resources = app.default_mediaplayer.load_sound(rid, app.native_activity)
			if mp_sound_resources.error != null then
				self.media_player = app.default_mediaplayer
				self.error = null
				self.media_player.error = null
			end
			self.error = mp_sound_resources.error
		else
			# Try assets
			var nam = app.asset_manager.open_fd(path)
			if nam.is_java_null then
				self.error = new Error("Failed to get file descriptor for " + path)
			else
				var mp_sound_assets = app.default_mediaplayer.data_source_fd(nam)
				nam.close
				if mp_sound_assets.error != null then
					self.error = mp_sound_assets.error
				else
					self.media_player = app.default_mediaplayer
					self.error = null
					self.media_player.error = null
				end
			end
		end
		is_loaded = true

		var error = error
		if error != null then print_error error
	end

	redef fun play do
		if not is_loaded then load
		if self.error != null then return
		media_player.start
	end

	redef fun pause do
		if self.error != null or not self.is_loaded then return
		media_player.pause
		paused = true
	end

	redef fun resume do
		if self.error != null or not self.is_loaded then return
		play
		paused = false
	end
end