settings

w,h = term.getSize()
slc = 0
isBuild = false
lastSelection = 1

function titleBar()
  term.setCursorPos(1,h)
  term.setBackgroundColor(colors.lightBlue)
  term.setTextColor(colors.white)
  term.clearLine()
  term.setTextColor(colors.white)
  term.setCursorPos(1, h)
  write(" Menu ")
end

function leftNavMenu1()
  term.setCursorPos(1,2)
  term.setBackgroundColor(colors.gray)
  print(" Storage ")
  term.setTextColor(colors.gray)
  term.setBackgroundColor(colors.white)
  print("Customize")
  print("  M-OS   ")
  print(" Startup ")
  paintutils.drawLine(10,2,10,h-1,colors.lightGray)
end

function leftNavMenu2()
  term.setCursorPos(1,2)
  term.setTextColor(colors.gray)
  term.setBackgroundColor(colors.white)
  print(" Storage ")
  term.setTextColor(colors.white)
  term.setBackgroundColor(colors.gray)
  print("Customize")
  term.setTextColor(colors.gray)
  term.setBackgroundColor(colors.white)
  print("  M-OS   ")
  print(" Startup ")
  paintutils.drawLine(10,2,10,h-1,colors.lightGray)
end

function leftNavMenu3()
  term.setCursorPos(1,2)
  term.setTextColor(colors.gray)
  term.setBackgroundColor(colors.white)
  print(" Storage ")
  print("Customize")
  term.setTextColor(colors.white)
  term.setBackgroundColor(colors.gray)
  print("  M-OS   ")
  term.setTextColor(colors.gray)
  term.setBackgroundColor(colors.white)
  print(" Startup ")
  paintutils.drawLine(10,2,10,h-1,colors.lightGray)
end

function leftNavMenu4()
  term.setCursorPos(1,2)
  term.setTextColor(colors.gray)
  term.setBackgroundColor(colors.white)
  print(" Storage ")
  print("Customize")
  print("  M-OS   ")
  term.setTextColor(colors.white)
  term.setBackgroundColor(colors.gray)
  print(" Startup ")
  paintutils.drawLine(10,2,10,h-1,colors.lightGray)
end

function selection1()
    slc = 1
    lastSelection = 1
    term.setTextColor(colors.gray)
    term.setBackgroundColor(colors.white)
    term.setCursorPos(12,2)
    print("Manage Storage")
    term.setCursorPos(12,4)
    local size = fs.getSize("m-os/desktop") + fs.getSize("m-os/programs/installed_programs")  + fs.getSize("m-os/monitior_detected") + fs.getSize("m-os/boot") + fs.getSize("m-os/settings") + fs.getSize("m-os/logon") + fs.getSize("m-os/restore")
    print("OS: " .. size .. " bytes.")
    term.setCursorPos(12,5)
    local picturesSize = fs.getSize("m-os/images/bground") + fs.getSize("m-os/images/logo") + fs.getSize("m-os/images/icons/file") + fs.getSize("m-os/images/icons/paint") + fs.getSize("m-os/images/icons/shell") +  fs.getSize("m-os/images/icons/unknown")
    print("Images: " .. picturesSize .. " bytes.")
    term.setCursorPos(12,6)
    local totalSpaceUsed = size + picturesSize
    print("Total space used: " .. totalSpaceUsed .. " bytes.")
    term.setCursorPos(12,7)
    local freeSpace = fs.getFreeSpace("/")
    print("Free space: " .. freeSpace .. " bytes.")
end

function selection2()
    slc = 2
    lastSelection = 2
    term.setTextColor(colors.gray)
    term.setBackgroundColor(colors.white)
    term.setCursorPos(12,2)
    print("Customize your Computer")
    term.setCursorPos(12,4)
    term.setTextColor(colors.lightGray)
    term.setBackgroundColor(colors.gray)
    print(" Edit Desktop Background ")
end


function selection3()
    slc = 3
    lastSelection = 3
    term.setTextColor(colors.gray)
    term.setBackgroundColor(colors.white)
    term.setCursorPos(12,2)
    print("M-OS")
    term.setCursorPos(12,3)
    print("Created by MarcoPolo0306")
    if isBuild == true then
      term.setCursorPos(12,5)
      print("Build date: 5/29/17")
      term.setCursorPos(12,6)
      print("Build version: 6")
    else
      term.setCursorPos(12,5)
      print("Version realease date: 29/4/17")
      term.setCursorPos(12,6)
      print("Version: 1.1.2")
      term.setCursorPos(25,6)
    end
    term.setCursorPos(12,8)
    term.setBackgroundColor(colors.gray)
    term.setTextColor(colors.lightGray)
    print(" Reinstall ")
    term.setCursorPos(12,10)
    term.setBackgroundColor(colors.gray)
    term.setTextColor(colors.lightGray)
    print(" Uninstall ")
end

function selection4()
    slc = 4
    lastSelection = 4
    term.setTextColor(colors.gray)
    term.setBackgroundColor(colors.white)
    term.setCursorPos(12,2)
    print("Startup Options")
    term.setBackgroundColor(colors.gray)
    term.setTextColor(colors.lightGray)
    term.setCursorPos(12,4)
    print(" Change Password ")
end

function drawWindow()
  local tbarC = colors.lightBlue
  local tBartC = colors.white
  term.setBackgroundColor(colors.white)
  term.clear()
  term.setCursorPos(1,1)
  term.setBackgroundColor(tbarC)
  term.setTextColor(tBartC)
  term.clearLine()
  term.setCursorPos(2,1)
  write("Settings")
  term.setCursorPos(w,1)
  term.setBackgroundColor(colors.red)
  print("X")
  term.setBackgroundColor(colors.white)
  term.setTextColor(colors.gray)
  leftNavMenu1()
end

function areYouSure()
  slc = 1
  local y1 = h/2-3
  local y2 = h/2+6
  paintutils.drawBox(w/2-10,h/2-3,w/2+10,h/2+4,colors.lightGray)
  paintutils.drawFilledBox(w/2-9,h/2-2,w/2+9,h/2+3,colors.white)
  paintutils.drawLine(w/2-10,h/2-3,w/2+10,h/2-3,colors.lightBlue)
  term.setTextColor(colors.white)
  term.setCursorPos(w/2-10, h/2-3)
  print("Are you sure?")
  term.setTextColor(colors.gray)
  term.setCursorPos(w/2-9, h/2-2)
  term.setBackgroundColor(colors.white)
  print(" Are you sure you")
  term.setCursorPos(w/2-9, h/2-1)
  print(" want to delete ")
  term.setCursorPos(w/2-9, h/2)
  print(" M-OS?")
  term.setCursorPos(w/2-6, h/2+2)
  term.setTextColor(colors.lightGray)
  term.setBackgroundColor(colors.gray)
  print(" Yes ")
  term.setCursorPos(w/2+3, h/2+2)
  print(" No ")
end

function createWindow()
  term.setBackgroundColor(1)
  term.clear()
  term.setCursorPos(1,1)
  leftNavMenu1()
  drawWindow()
  titleBar()
end

createWindow()
selection1()

while true do
  createWindow()
  if lastSelection == 1 then
    leftNavMenu1()
    selection1()
  elseif lastSelection == 2 then
    leftNavMenu2()
    selection2()
  elseif lastSelection == 3 then
    leftNavMenu3()
    selection3()
  elseif lastSelection == 4 then
    leftNavMenu4()
    selection4()
  end
  local event, button, X, Y = os.pullEvent()
  if event == "mouse_click" then
    if X==w and Y==1 and button ==1 then
      shell.run("m-os/desktop")
    elseif X>=1 and X<=9 and Y==2 and button == 1 then
      createWindow()
      leftNavMenu1()
      selection1()
    elseif X>=1 and X<=9 and Y==3 and button == 1 then
      createWindow()
      leftNavMenu2()
      selection2()
    elseif X>=1 and X<=9 and Y==4 and button == 1 then
      createWindow()
      leftNavMenu3()
      selection3()
    elseif X>=1 and X<=9 and Y==5 and button == 1 then
      createWindow()
      leftNavMenu4()
      selection4()
    elseif X>=12 and X<=37 and Y==4 and slc == 2 and button == 1 then
      shell.run("paint","m-os/images/bground")
    elseif X>=12 and X<=23 and Y==8 and slc == 3 and button == 1 then
      term.setBackgroundColor(colors.black)
      term.clear()
      term.setCursorPos(1,1)
      print("Thank you for using M-OS. Your computer will reboot in 5 seconds.")
      fs.delete("startup")
      shell.run("pastebin get JuDHtxJt startup")
      sleep(5)
      os.reboot()
    elseif X>=12 and X<=23 and Y==10 and slc == 3 and button == 1 then
      term.setBackgroundColor(colors.black)
      term.clear()
      term.setCursorPos(1,1)
      print("Thank you for using M-OS. Your computer will reboot in 5 seconds.")
      fs.delete("startup")
	  fs.delete("m-os")
      sleep(5)
      os.reboot()
    elseif X>=12 and X<=37 and Y==4 and slc == 4 and button == 1 then
      shell.run("edit","m-os/logon")
    end
  end
end

local ok, err = pcall(main)
if not ok then
  term.setBackgroundColor(colors.red)
  term.clear()
  term.setBackgroundColor(colors.gray)
  term.setCursorPos(1,1)
  term.clearLine()
  term.setTextColor(colors.white)
  print("Internal System Error")
  term.setBackgroundColor(colors.red)
  print("The following error has occured: " .. err)
  print("Please report this error to MarcoPolo0306. (=")
  print("(Your computer will restart in 15 seconds.)")
  sleep(15)
  os.reboot()
end