editor={
    paused=true,
    cam={x=0,y=0},
    --selected_tile=3,
    brush={w=1,h=1,tiles={3}},
    selection=nil,

    init=function()
        set_update(editor.update)
        editor.show_menu()
    end,

    show_menu=function()
        menu.show({ {"NEW MAP",         editor.new},
                    {"LOAD MAP",        function() textbox.show("FILENAME TO LOAD:",editor.load, mapa.name) end},
                    {"SAVE MAP",        function() if mapa.name~=nil then editor.save(mapa.name) else textbox.show("FILENAME TO SAVE:",editor.save, mapa.name) end end},
--                    {"BACK TO EDITOR",  function() editor.paused=false end},
                    {"EXIT",            main_init},
--                    {"ENNER LLOR NEIM", function() textbox.show("PELANDRUSC!") end}
                }, function()editor.paused=false end)
    end,

    floodfill=function(x,y,tile)
        local t=mget(x,y)
        mset(x,y,tile)
        if x<mapa.w-1 and mget(x+1,y)==t then editor.floodfill(x+1,y,tile) end
        if x>0 and mget(x-1,y)==t then editor.floodfill(x-1,y,tile) end
        if y<mapa.h-1 and mget(x,y+1)==t then editor.floodfill(x,y+1,tile) end
        if y>0 and mget(x,y-1)==t then editor.floodfill(x,y-1,tile) end
    end,

    create_stamp=function()
        local tx1,ty1,tx2,ty2=editor.selection.x1,editor.selection.y1,editor.selection.x2,editor.selection.y2
        if tx1>tx2 then tx1,tx2=tx2,tx1 end
        if ty1>ty2 then ty1,ty2=ty2,ty1 end
        editor.brush.w=tx2-tx1+1
        editor.brush.h=ty2-ty1+1
        local w,h=editor.brush.w,editor.brush.h
        local p=1
        for y=1,h do
            for x=1,w do
                editor.brush.tiles[p]=mget(tx1+x-1,ty1+y-1)
                --mset(tx+x-1,ty+y-1,editor.brush.tiles[p])
                p=p+1
            end
        end

    end,

    stamp=function(tx,ty)
        local w,h=editor.brush.w,editor.brush.h
        local p=1
        for y=1,h do
            for x=1,w do
                mset(tx+x-1,ty+y-1,editor.brush.tiles[p])
                p=p+1
            end
        end
    end,

    displace=function(dx,dy)
        local w,h=mapa.w,mapa.h
        if dx>0 then
            for y=0,h-1 do
                for x=w-1,1,-1 do
                    mset(x,y,mget(x-1,y))
                end
            end
        elseif dx<0 then
            for y=0,h-1 do
                for x=0,w-2 do
                    mset(x,y,mget(x+1,y))
                end
            end
        elseif dy>0 then
            for y=h-1,1,-1 do
                for x=0,w-1 do
                    mset(x,y,mget(x,y-1))
                end
            end
        elseif dy<0 then
            for y=0,h-2 do
                for x=0,w-1 do
                    mset(x,y,mget(x,y+1))
                end
            end
        end
    end,

    update=function()
        cls()
        camera(editor.cam.x, editor.cam.y)
        map(0,0,0,0,mapa.w, mapa.h)

        local mx,my=mousex()+editor.cam.x,mousey()+editor.cam.y
        local tx,ty=mx>>3,my>>3
        local rx,ry=tx<<3,ty<<3
        rect(rx-1, ry-1, rx+8, ry+8, 10)
        if editor.selection then
            local rx1,ry1,rx2,ry2=editor.selection.x1<<3,editor.selection.y1<<3,editor.selection.x2<<3,editor.selection.y2<<3
            if rx1>rx2 then rx1,rx2=rx2,rx1 end
            if ry1>ry2 then ry1,ry2=ry2,ry1 end
            rect(rx1-1, ry1-1, rx2+8, ry2+8, 8)
        end
        camera(0,0)
        if tx>=0 and
            ty>=0 and
            tx<mapa.w and
             ty<mapa.h then
            text(tx..","..ty,2,2,8)
        end
        if not editor.paused then
            if mbtn(1) then
                editor.stamp(tx,ty)
                --mset(tx,ty,editor.brush.tiles[1])
            end
            if mbtn(3) then
                if editor.selection then
                    editor.selection.x2=tx
                    editor.selection.y2=ty
                else
                    editor.selection={}
                    editor.selection.x1=tx
                    editor.selection.y1=ty
                    editor.selection.x2=tx
                    editor.selection.y2=ty
                end
            else
                if editor.selection then
                    editor.create_stamp()
                    editor.selection=nil
                end
            end

            if btn(KEY_LSHIFT) then
                if btnp(KEY_RIGHT) then editor.displace(1,0) end
                if btnp(KEY_LEFT) then editor.displace(-1,0) end
                if btnp(KEY_UP) then editor.displace(0,-1) end
                if btnp(KEY_DOWN) then editor.displace(0,1) end
            else
                if btnp(KEY_RIGHT) then editor.cam.x=editor.cam.x+8 end
                if btnp(KEY_LEFT) then editor.cam.x=editor.cam.x-8 end
                if btnp(KEY_UP) then editor.cam.y=editor.cam.y-8 end
                if btnp(KEY_DOWN) then editor.cam.y=editor.cam.y+8 end
            end
            
            if btnp(KEY_F) then
                editor.floodfill(tx,ty,editor.brush.tiles[1])
            end
            if btnp(KEY_RETURN) then
                editor.brush.tiles[1]=mget(tx,ty)
            end
            if btnp(KEY_ESCAPE) then
                editor.paused=true
                editor.show_menu()
            end
            if btnp(KEY_TAB) then
                update=editor.update_tileset
            end
        end
    end,

    update_tileset=function()
        cls()
        sspr(0,0,128,128,0,0)

        local mx,my=mousex(),mousey()
        local tx,ty=mx>>3,my>>3
        local rx,ry=tx<<3,ty<<3
        rect(rx-1, ry-1, rx+8, ry+8, 10)

        if btnp(KEY_TAB) or btnp(KEY_ESCAPE) then
            update=editor.update
        end

        if mbtnp(1) then
            if tx<16 and ty<16 then
                editor.brush.w=1
                editor.brush.h=1
                editor.brush.tiles={}
                editor.brush.tiles[1]=ty*16+tx
            end
            update=editor.update
        end
    end,

    new=function()
        mapa.new(128,128)
        editor.paused=false
    end,

    save=function(filename)
        mapa.save(filename)
        editor.paused=false
    end,

    load=function(filename)
        mapa.load(filename)
        editor.paused=false
    end
}