--[[
Bismillahirahmanirrahim

Audio control class for Gideros
by: Edwin Zaniar Putra (zaniar@nightspade.com)

This code is MIT licensed, see http://www.opensource.org/licenses/mit-license.php
Copyright 2012 Nightspade (http://nightspade.com)

gideros_audio
=============
Audio control class for Gideros
This class provides:
* easy way to mute/unmute
* easy way to manage and play BGM
* easy way to manage and play SFX
```Audio.new()``` Creates a new Audio object
```Audio:setBgms(bgms)``` Sets BGMs table with ```bgms``` table
```Audio:setSfxs(sfxs)``` Sets SFXs table with ```sfxs``` table 
```Audio:clearBgms()``` Clears BGMs table
```Audio:clearSfxs()```Clears SFXs table
```Audio:addBgm(name, path)``` Adds new BGM to BGM table
```Audio:addSfx(name, path)``` Adds new SFX to SFX table
```Audio:removeBgm(name)``` Removes a BGM identified by ```name```
```Audio:removeSfx(name)``` Removes a SFX identified by ```name```
```Audio:playBgm(name, force)``` Plays a BGM identified by ```name```. Allow to replay currently playing BGM by setting ```force``` to ```true```
```Audio:playSfx(name)``` Plays a SFX identified by ```name```
```Audio:mute(mode)``` Mutes audio. Available ```mode```s are "bgm", "sfx". To mute all audio set ```mode``` to ```nil```
```Audio:unmute(mode)``` Unmutes audio. Available ```mode```s are "bgm", "sfx". To unmute all audio set ```mode``` to ```nil```

Simple example:
```
audio = Audio.new()
audio:setBgms{
	["mainmenu"] = "path/to/mainmenu.mp3",
	["gameplay"] = "path/to/gameplay.mp3"
}
audio:setSfx{
	["explosion"] = "path/to/explosion.mp3",
	["ding"] = "path/to/ding.mp3"
}
audio:playBgm("mainmenu")
audio:playSfx("explosion")
```
]]


Audio = Core.class()

function Audio:init()
	self.bgmChannel = nil
	self.bgmCurrentName = nil
	self.bgmCurrent = nil
	self.bgmPos = 0
	
	self.bgmMute = false
	self.sfxMute = false

	self.bgms = {}
	self.sfxs = {}
end

function Audio:setBgms(bgms) self.bgms = bgms end
function Audio:setSfxs(sfxs)
	for name, path in pairs(sfxs) do self.sfxs[name] = Sound.new(path) end
end

function Audio:clearBgms() self.bgms = {} end
function Audio:clearSfxs() self.sfxs = {} end

function Audio:addBgm(name, path) self.bgms[name] = path end
function Audio:addSfx(name, path) self.sfxs[name] = Sound.new(path) end

function Audio:removeBgm(name) self.bgms[name] = nil end
function Audio:removeSfx(name) self.sfxs[name] = nil end

function Audio:playBgm(name, force)
	if name ~= self.bgmCurrentName or force then
		if self.bgmChannel then
			self.bgmChannel:stop()
			self.bgmChannel = nil
			self.bgmCurrentName = nil
			self.bgmCurrent = nil
			self.bgmPos = 0
		end
		if not self.bgmMute and not self.bgmChannel then
			self.bgmCurrentName = name
			self.bgmCurrent = Sound.new(self.bgms[name])
			self.bgmChannel = self.bgmCurrent:play(self.bgmPos, math.huge)
		end
	end
end
function Audio:playSfx(name)
	if not self.sfxMute then return self.sfxs[name]:play() end
end

function Audio:mute(mode)
	if mode == "bgm" then
		self.bgmMute = true
		if self.bgmChannel then
			self.bgmPos = self.bgmChannel:getPosition()
			self.bgmChannel:stop()
			self.bgmChannel = nil
		end
	elseif mode == "sfx" then
		self.sfxMute = true
	else
		self.bgmMute = true
		if self.bgmChannel then
			self.bgmPos = self.bgmChannel:getPosition()
			self.bgmChannel:stop()
			self.bgmChannel = nil
		end
		self.sfxMute = true
	end
end
function Audio:unmute(mode)
	if mode == "bgm" then
		self.bgmMute = false
		self.bgmChannel = self.bgmCurrent:play(self.bgmPos, math.huge)
	elseif mode == "sfx" then
		self.sfxMute = false
	else
		self.bgmMute = false
		self.bgmChannel = self.bgmCurrent:play(self.bgmPos, math.huge)
		self.sfxMute = false
	end
end