local gc=love.graphics
local sin=math.sin

local author={
	battle="Aether",
	empty="ERM",
	["how feeling"]="????",
}

local scene={}

local selected--Music selected

local bgmList=BGM.getList()
if #bgmList==0 then bgmList={"[NO BGM]"}end
function scene.sceneInit()
	selected=TABLE.find(bgmList,BGM.nowPlay)or 1
end

function scene.wheelMoved(_,y)
	WHEELMOV(y)
end
function scene.keyDown(key)
	local S=selected
	if key=="down"then
		if S<#bgmList then
			selected=S+1
			SFX.play('move',.7)
		end
	elseif key=="up"then
		if S>1 then
			selected=S-1
			SFX.play('move',.7)
		end
	elseif key=="return"or key=="space"then
		if BGM.nowPlay~=bgmList[S]then
			BGM.play(bgmList[S])
			if SETTING.bgm>0 then SFX.play('click')end
		else
			BGM.stop()
		end
	elseif key=="tab"then
		SCN.swapTo('sound','none')
	elseif key=="escape"then
		SCN.back()
	end
end

function scene.draw()
	gc.setColor(1,1,1)

	setFont(50)
	gc.print(bgmList[selected],320,355)
	setFont(35)
	if selected>1 then			gc.print(bgmList[selected-1],320,350-30)end
	if selected<#bgmList then	gc.print(bgmList[selected+1],320,350+65)end
	setFont(20)
	if selected>2 then			gc.print(bgmList[selected-2],320,350-50)end
	if selected<#bgmList-1 then	gc.print(bgmList[selected+2],320,350+110)end

	gc.draw(TEXTURE.title,840,220,nil,.5,nil,580,118)
	if BGM.nowPlay then
		local t=TIME()
		setFont(50)
		gc.setColor(sin(t*.5)*.2+.8,sin(t*.7)*.2+.8,sin(t)*.2+.8)
		gc.print(BGM.nowPlay,710,500)
		setFont(35)
		gc.setColor(1,sin(t*2.6)*.5+.5,sin(t*2.6)*.5+.5)
		gc.print(author[BGM.nowPlay]or"MrZ",680,465)

		local a=-t%2.3/2
		if a<1 then
			gc.setColor(1,1,1,a)
			gc.draw(TEXTURE.title_color,840,220,nil,.5+.062-.062*a,.5+.126-.126*a,580,118)
		end

		gc.setColor(1,1,1,.4)
		gc.setLineWidth(4)
		gc.line(500,600,900,600)
		gc.setColor(1,1,1)
		gc.circle('fill',500+400*BGM.playing:tell()/BGM.playing:getDuration(),600,6)
	end
end

scene.widgetList={
	WIDGET.newText{name="title",	x=30,	y=30,font=80,align='L'},
	WIDGET.newText{name="arrow",	x=270,	y=360,font=45,align='L'},
	WIDGET.newText{name="now",		x=700,	y=500,font=50,align='R',hide=function()return not BGM.nowPlay end},
	WIDGET.newSlider{name="bgm",	x=760,	y=80,w=400,		font=35,disp=SETval("bgm"),code=function(v)SETTING.bgm=v BGM.freshVolume()end},
	WIDGET.newButton{name="up",		x=200,	y=250,w=120,	font=55,code=pressKey"up",hide=function()return selected==1 end},
	WIDGET.newButton{name="play",	x=200,	y=390,w=120,	font=35,code=pressKey"space"},
	WIDGET.newButton{name="down",	x=200,	y=530,w=120,	font=55,code=pressKey"down",hide=function()return selected==#bgmList end},
	WIDGET.newButton{name="sound",	x=1140,	y=540,w=170,h=80,font=40,code=pressKey"tab"},
	WIDGET.newButton{name="back",	x=1140,	y=640,w=170,h=80,font=40,code=backScene},
}

return scene