-- Desktop
slc = 0
tBarC = 8
tBartC = 1
backColor = 1
term.setBackgroundColor(backColor)
term.clear()

-- Functions
function titleBar()
  term.setCursorPos(1,1)
  term.setBackgroundColor(tBarC)
  term.setTextColor(tBartC)
  term.clearLine()
  term.setCursorPos(2, 1)
  print("[Start Menu]")
  term.setCursorPos(15, 1)
  print("Reactor Commands")
end

function drawDesktop()
  term.setBackgroundColor(backColor)
  term.clear()
  bground = paintutils.loadImage(".background")
  paintutils.drawImage(bground,1,1)
  titleBar()
end

function drawMenu1()
  term.setTextColor(256)
  term.setBackgroundColor(128)
  term.setCursorPos(1,2)
  print("           ")
  term.setCursorPos(1,3)
  print(" Shutdown ")
  term.setCursorPos(1,4)
  print(" Restart  ")
  term.setCursorPos(1,5)
  print("           ")
end

function drawMenu2()
  term.setTextColor(256)
  term.setBackgroundColor(128)
  term.setCursorPos(15,2)
  print("                    ")
  term.setCursorPos(15,3)
  print(" Start Reactor ")
  term.setCursorPos(15,4)
  print(" Stop Reactor  ")
  term.setCursorPos(15,5)
  print(" Lock Room        ")
  term.setCursorPos(15,6)
  print("                    ")
end

-- Main Loop
drawDesktop()
while true do
  local event, arg1, arg2, arg3 = os.pullEvent()

  if event == "mouse_click" then

    if slc == 0 then
      if event == "mouse_click" then
        if arg2 >=2 and arg2 <=15 and arg3==1 and arg1 ==1 then
          drawMenu1()
          slc = 1
        elseif arg2 >=15 and arg2 <=30 and arg3==1 and arg1 ==1 then
          drawMenu2()
          slc = 1
        else
          drawDesktop()
        end
      end
    elseif slc == 1 then
      if event == "mouse_click" then
        if arg2 >=1 and arg2 <=11 and arg1 == 1 and arg3== 3 then
          slc = 0
          os.shutdown()
        elseif arg2>=1 and arg2<=11 and arg3==4 and arg1 ==1 then
          slc = 0
          os.reboot()
        elseif arg2>=15 and arg2<=25 and arg3==3 and arg1 ==1 then
          slc = 0
          rednet.open("top")
          rednet.broadcast("Reactor 1 On")
          rednet.close("top")
          rs.setOutput("back", true)
        elseif arg2>=15 and arg2<=25 and arg3==4 and arg1 ==1 then
          slc = 0
          rednet.open("top")
          rednet.broadcast("Reactor 1 Off")
          rednet.close("top")
          rs.setOutput("back", false)
        elseif arg2>=15 and arg2<=20 and arg3==5 and arg1 ==1 then
          slc = 0
          os.shutdown()
        else
          slc = 0
          drawDesktop()
        end
      end
    end

  elseif event == "rednet_message" and arg2 == "Reactor 1 Overheat" then

    rs.setOutput("back", false)
    rednet.open("top")
    rednet.broadcast("Reactor 1 Off")
    rednet.close("top")

  else

    drawDesktop()

  end
end