local gc,ms=love.graphics,love.mouse
local floor,rnd=math.floor,math.random
local rem=table.remove
local setFont,mStr=FONT.set,GC.mStr

local scene={}

local board,rank
local invis,disappear
local startTime,time
local state,progress
local tapFX,mistake

function scene.enter()
    BG.set('space')
    BGM.play('way')
    board={}
    rank=3
    invis=false
    disappear=false
    tapFX=true

    startTime=0
    time=0
    mistake=0
    state=0
    progress=0
end

local function newBoard()
    local L={}
    for i=1,rank^2 do
        L[i]=i
    end
    for i=1,rank^2 do
        board[i]=rem(L,rnd(#L))
    end
end
local function tapBoard(x,y)
    local R=rank
    if x>320 and x<960 and y>40 and y<680 then
        if state==0 then
            newBoard()
            state=1
            startTime=TIME()
            progress=0
        elseif state==1 then
            local X=floor((x-320)/640*R)
            local Y=floor((y-40)/640*R)
            x=R*Y+X+1
            if board[x]==progress+1 then
                progress=progress+1
                if progress<R^2 then
                    SFX.play('lock')
                else
                    time=TIME()-startTime+mistake
                    state=2
                    SFX.play('reach')
                end
                if tapFX then
                    SYSFX.newShade(3,320+640/R*X,40+640/R*Y,640/R,640/R,.6,.8,1)
                end
            else
                mistake=mistake+1
                if tapFX then
                    SYSFX.newShade(2,320+640/R*X,40+640/R*Y,640/R,640/R,1,.4,.5)
                end
                SFX.play('finesseError')
            end
        end
    end
end

function scene.mouseDown(x,y)
    tapBoard(x,y)
end
function scene.touchDown(x,y)
    tapBoard(x,y)
end
function scene.keyDown(key,isRep)
    if isRep then return end
    if key=='z' or key=='x' then
        love.mousepressed(ms.getPosition())
    elseif key=='space' then
        if state>0 then
            board={}
            time=0
            mistake=0
            state=0
            progress=0
        end
    elseif key=='q' then
        if state==0 then
            invis=not invis
        end
    elseif key=='w' then
        if state==0 then
            disappear=not disappear
        end
    elseif key=='e' then
        if state==0 then
            tapFX=not tapFX
        end
    elseif key=='3' or key=='4' or key=='5' or key=='6' then
        if state==0 then
            rank=tonumber(key)
        end
    elseif key=='escape' then
        SCN.back()
    end
end

function scene.update()
    if state==1 then
        time=TIME()-startTime+mistake
    end
end

function scene.draw()
    setFont(40)
    gc.setColor(COLOR.Z)
    gc.print(("%.3f"):format(time),1026,80)
    gc.print(mistake,1026,150)

    setFont(70)
    mStr(state==1 and progress or state==0 and "Ready" or state==2 and "Win",1130,300)

    gc.setColor(COLOR.dX)
    gc.rectangle('fill',310,30,660,660)
    if state==2 then
        gc.setColor(.9,.9,0)-- win
    elseif state==1 then
        gc.setColor(.9,.9,.9)-- game
    elseif state==0 then
        gc.setColor(.2,.8,.2)-- ready
    end
    gc.setLineWidth(10)
    gc.rectangle('line',310,30,660,660)

    -- Draw no-setting area
    if state==2 then
        gc.setColor(1,0,0,.3)
        gc.rectangle('fill',15,295,285,250)
    end

    local width=640/rank
    local mono=state==0 or invis and state==1 and progress>0
    gc.setLineWidth(4)
    local f=180-rank*20
    setFont(f)
    for i=1,rank do
        for j=1,rank do
            local N=board[rank*(i-1)+j]
            if not (state==1 and disappear and N<=progress) then
                gc.setColor(.4,.5,.6)
                gc.rectangle('fill',320+(j-1)*width,(i-1)*width+40,width,width)
                gc.setColor(COLOR.Z)
                gc.rectangle('line',320+(j-1)*width,(i-1)*width+40,width,width)
                if not mono then
                    local x,y=320+(j-.5)*width,40+(i-.5)*width-f*.67
                    gc.setColor(.1,.1,.1)
                    mStr(N,x-3,y-1)
                    mStr(N,x-1,y-3)
                    gc.setColor(COLOR.Z)
                    mStr(N,x,y)
                end
            end
        end
    end
end

scene.widgetList={
    WIDGET.newButton{name='reset',    x=160,y=100,w=180,h=100,color='lG',font=50,fText=CHAR.icon.retry_spin,code=pressKey'space',hideF=function() return state==0 end},
    WIDGET.newSlider{name='rank',     x=130,y=250,lim=105,w=150,axis={3,6,1},show=false,font=40,disp=function() return rank end,code=function(v) rank=v end,hideF=function() return state>0 end},
    WIDGET.newSwitch{name='invis',    x=240,y=330,lim=200,font=40,disp=function() return invis end,code=pressKey'q',hideF=function() return state==1 end},
    WIDGET.newSwitch{name='disappear',x=240,y=420,lim=200,font=40,disp=function() return disappear end,code=pressKey'w',hideF=function() return state==1 end},
    WIDGET.newSwitch{name='tapFX',    x=240,y=510,lim=200,font=40,disp=function() return tapFX end,code=pressKey'e',hideF=function() return state==1 end},
    WIDGET.newButton{name='back',     x=1140,y=640,w=170,h=80,sound='back',font=60,fText=CHAR.icon.back,code=backScene},
}

return scene