.menu

os.pullEvent = os.pullEventRaw

local w,h = term.getSize()
function printCentered (y,s)
  local x = math.floor((w - string.len(s) /2))
  term.setCursorPos(x.y)
  term.clearLine()
  term.write(s)
end

local nOption = 1

local function drawMenu()
  term.clear()
  term.setCursorPos(1,1)
  term.write("PigNet V1")

  term.setCursorPos(w-11,1)
  if nOption == 1 then
    term.write("Command")
   elseif nOption == 2 then
     term.write("Programs")
   elseif nOption == 3 then
     term.write("Shutdown")
   elseif nOption == 4 then
     term.write("Uninstall")
   else
     end
end

term.clear
local function drawFrontend()
   printCentered(math.floor(h/2) - 3, "")
   printCentered(math.floor(h/2) - 2, "Start Menu"
   printCentered(math.floor(h/2) - 1, ""
   printCentered(math.floor(h/2) + 0, ((nOption == 1) and "[ Command  ]") or "Command"
   printCentered(math.floor(h/2) + 1, ((nOption == 2)and "[ Programs ]") or "Programs"
   printCentered(math.floor(h/2) + 2, ((nOption == 3) and "[ Shutdown ]") or "Shutdown"
   printCentered(math.floor(h/2) + 3, ((nOption == 4)and "[ Uninstall]") or "Uninstall"
  end


Menu()
drawFrontend()

while true do
  local e,p = os.pullEvent()
    if e == "key" then
      local key == p
      if key == 17 or key == 200 then

        if nOption > 1 then
          nOption = nOPtion - 1
          drawMenu()
          drawFrontend()
         end
        elseif key == 31 or key == 208 then
          if nOption < 4 then
            nOption = nOption + 1
            drawMenu()
            drawFrontend()
          end
        end
     elseif key == 28 then
       break
     end
   end
 end
end
 term.clear

--conditions
if nOption == 1 then
  shell.run("os/.command")
elseif Noption == 2 then
  shell.run("os/.programs")
elseif nOption == 3 then
  os.shutdown()
else
  shell.run("os/.uninstall")
end