local gc=love.graphics
local int,log=math.floor,math.log
local sin,cos=math.sin,math.cos
local max,format=math.max,string.format
local scr=scr
local SCN={
	cur="load",--Current scene
	swapping=false,--ifSwapping
	swap={
		tar=nil,	--Swapping target
		style=nil,	--Swapping style
		mid=nil,	--Loading point
		time=nil,	--Full swap time
		draw=nil,	--Swap draw  func
	},
	seq={"quit","slowFade"},--Back sequence
}--scene datas,returned
local sceneInit={
	quit=love.event.quit,
	load=function()
		sceneTemp={
			phase=1,--Loading stage
			cur=1,--Counter
			tar=#VOC.name,--Loading bar lenth(current)
			tip=require("parts/getTip"),
			list={
				#VOC.name,
				#BGM.list,
				#SFX.list,
				IMG.getCount(),
				#modes,
				1,
			},
			skip=false,--if skipping
		}
	end,
	intro=function()
		BG.set("space")
		sceneTemp=0--animation timer
		BGM.play("blank")
	end,
	main=function()
		BG.set("space")
		BGM.play("blank")
		destroyPlayers()
		modeEnv={}
		if not players[1]then
			newDemoPlayer(1,900,35,1.1)
		end--create demo player
	end,
	music=function()
		if BGM.nowPlay then
			for i=1,BGM.len do
				if BGM.list[i]==BGM.nowPlay then
					sceneTemp=i--music select
					return
				end
			end
		else
			sceneTemp=1
		end
	end,
	mode=function(org)
		BG.set("space")
		BGM.play("blank")
		destroyPlayers()
		local cam=mapCam
		cam.zoomK=org=="main"and 5 or 1
		if cam.sel then
			local M=modes[cam.sel]
			cam.x,cam.y=M.x*cam.k+180,M.y*cam.k
			cam.x1,cam.y1=cam.x,cam.y
		end
	end,
	custom=function()
		sceneTemp=1--option select
		destroyPlayers()
		BG.set(customRange.bg[customSel[12]])
		BGM.play(customRange.bgm[customSel[13]])
	end,
	draw=function()
		BG.set("space")
		sceneTemp={
			sure=0,
			pen=1,
			x=1,y=1,
			demo=false,
		}
	end,
	play=function()
		love.keyboard.setKeyRepeat(false)
		restartCount=0
		if needResetGameData then
			resetGameData()
			needResetGameData=nil
		end
		BG.set(modeEnv.bg)
	end,
	pause=function(org)
		if 
			org=="setting_game"or
			org=="setting_video"or
			org=="setting_sound"
		then
			TEXT.show(text.needRestart,640,440,50,"fly",.6)
		end
		local S=players[1].stat
		sceneTemp={
			timer=org=="play"and 0 or 50,
			list={
				toTime(S.time),
				S.key.."/"..S.rotate.."/"..S.hold,
				format("%d  %.2fPPS",S.piece,S.piece/S.time),
				format("%d(%d)  %.2fLPM",S.row,S.dig,S.row/S.time*60),
				format("%d(%d)",S.atk,S.digatk),
				format("%d(%d-%d)",S.pend,S.recv,S.recv-S.pend),
				format("%d/%d/%d/%d",S.clear_S[1],S.clear_S[2],S.clear_S[3],S.clear_S[4]),
				format("(%d)/%d/%d/%d",S.spin_S[1],S.spin_S[2],S.spin_S[3],S.spin_S[4]),
				format("%d(+%d)/%d(%d)",S.b2b,S.b3b,S.pc,S.hpc),
				format("%d[%.2f%%]",S.extraPiece,100*max(1-S.extraRate/S.piece,0)),
			},

			--from right-down, 60 degree each
			radar={
				(S.recv-S.pend+S.dig)/S.time*60,--DefPM
				(S.recv-S.pend)/S.time*60,		--OffPM
				S.atk/S.time*60,				--AtkPM
				S.send/S.time*60,				--SendPM
				S.piece/S.time*24,				--LinePM
				S.dig/S.time*60,				--DigPM
			},
			val={1/80,1/40,1/60,1/60,1/100,1/40},
			timing=org=="play",
		}
		local _=sceneTemp
		local A,B=_.radar,_.val
		for i=1,6 do
			B[i]=B[i]*A[i]if B[i]>1.26 then B[i]=1.26+(B[i]-1.26)*.26 end
		end--normalize vals
		for i=1,6 do
			A[i]=format("%.2f",A[i])..text.radarData[i]
		end
		local f=1
		for i=1,6 do
			if B[i]>.5 then f=2 end
			if B[i]>1 then f=3 break end
		end
		if f==1 then	 _.color,f={.4,.9,.5},1.25	--Vegetable
		elseif f==2 then _.color,f={.4,.7,.9},1		--Normal
		elseif f==3 then _.color,f={1,.3,.3},.626	--Diao
		end
		A={
			120*.5*f,	120*3^.5*.5*f,
			120*-.5*f,	120*3^.5*.5*f,
			120*-1*f,	120*0*f,
			120*-.5*f,	120*-3^.5*.5*f,
			120*.5*f,	120*-3^.5*.5*f,
			120*1*f,	120*0*f,
		}
		_.scale=f
		_.standard=A

		for i=6,1,-1 do
			B[2*i-1],B[2*i]=B[i]*A[2*i-1],B[i]*A[2*i]
		end
		_.val=B
	end,
	setting_game=function()
		BG.set("space")
	end,
	setting_video=function()
		BG.set("space")
	end,
	setting_sound=function()
		sceneTemp={last=0,jump=0}--last sound time,animation count(10 to 0)
		BG.set("space")
	end,
	setting_control=function()
		sceneTemp={
			das=setting.das,
			arr=setting.arr,
			pos=0,
			dir=1,
			wait=30,
		}
		BG.set("strap")
	end,
	setting_key=function()
		sceneTemp={
			board=1,
			kb=1,js=1,
			kS=false,jS=false,
		}
	end,
	setting_touch=function()
		BG.set("game2")
		sceneTemp={
			default=1,
			snap=1,
			sel=nil,
		}
	end,
	setting_touchSwitch=function()
		BG.set("matrix")
	end,
	help=function()
		sceneTemp={
			pw=0,
		}
		BG.set("space")
	end,
	stat=function()
		local S=stat
		sceneTemp={
			chart={
				A1=S.spin,A2=S.clear,
				X1=S.spin_S,X2=S.clear_S,
				Y1=S.spin_B,Y2=S.clear_B,
			},
			item={
				S.run,
				S.game,
				toTime(S.time),
				S.key.."  "..S.rotate.."  "..S.hold,
				S.piece.."  "..S.row.."  "..int(S.atk),
				S.recv.."  "..(S.recv-S.pend).."  "..S.pend,
				S.dig.."  "..int(S.digatk),
				format("%.2f  %.2f",S.atk/S.row,S.digatk/S.dig),
				format("%d/%.3f%%",S.extraPiece,100*max(1-S.extraRate/S.piece,0)),
				S.b2b.."  "..S.b3b,
				S.pc.."  "..S.hpc,
			}
		}
		for i=1,11 do
			sceneTemp.item[i]=text.stat[i].."\t"..sceneTemp.item[i]
		end
	end,
	history=function()
		BG.set("strap")
		sceneTemp={require("updateLog"),1}--scroll pos
	end,
	quit=function()
		love.timer.sleep(.3)
		love.event.quit()
	end,
}
local swap={
	none={1,0,NULL},
	flash={8,1,function()gc.clear(1,1,1)end},
	fade={30,15,function(t)
		local t=t>15 and 2-t/15 or t/15
		gc.setColor(0,0,0,t)
		gc.rectangle("fill",0,0,scr.w,scr.h)
	end},
	fade_togame={120,20,function(t)
		local t=t>20 and (120-t)/100 or t/20
		gc.setColor(0,0,0,t)
		gc.rectangle("fill",0,0,scr.w,scr.h)
	end},
	slowFade={180,90,function(t)
		local t=t>90 and 2-t/90 or t/90
		gc.setColor(0,0,0,t)
		gc.rectangle("fill",0,0,scr.w,scr.h)
	end},
}--Scene swapping animations
local backFunc={
	load=love.event.quit,
	pause=function()
		love.keyboard.setKeyRepeat(true)
		mergeStat(stat,players[1].stat)
		TASK.clear("play")
	end,
	setting_game=	function()FILE.saveSetting()end,
	setting_video=	function()FILE.saveSetting()end,
	setting_sound=	function()FILE.saveSetting()end,
	setting_touch=	function()FILE.saveVK()end,
	setting_key=	function()FILE.saveKeyMap()end,
	setting_lang=	function()FILE.saveSetting()end,
}
function SCN.swapUpdate()
	local S=SCN.swap
	S.time=S.time-1
	if S.time==S.mid then
		SCN.init(S.tar,SCN.cur)
		SCN.cur=S.tar
		WIDGET.set(widgetList[S.tar])
		collectgarbage()
		--Scene swapped this moment
	end
	if S.time==0 then
		SCN.swapping=false
	end
end
function SCN.init(s,org)
	if sceneInit[s]then sceneInit[s](org)end
end
function SCN.push(tar,style)
	if not SCN.swapping then
		local m=#SCN.seq
		SCN.seq[m+1]=tar or SCN.cur
		SCN.seq[m+2]=style or"fade"
	end
end
function SCN.pop()
	local _=SCN.seq
	_[#_-1]=nil
end
function SCN.swapTo(tar,style)
	local S=SCN.swap
	if not SCN.swapping and tar~=SCN.cur then
		SCN.swapping=true
		if not style then style="fade"end
		S.tar=tar
		S.style=style
		local swap=swap[style]
		S.time=swap[1]
		S.mid=swap[2]
		S.draw=swap[3]
	end
end
function SCN.back()
	if backFunc[SCN.cur] then backFunc[SCN.cur]()end
	--func when scene end
	local m=#SCN.seq
	if m>0 then
		SCN.swapTo(SCN.seq[m-1],SCN.seq[m])
		SCN.seq[m],SCN.seq[m-1]=nil
		--Poll&Back to preScene
	end
end
return SCN