GEM GeneralPurpose

pref = {}
w, h = term.getSize()
pref["w"] = w
pref["h"] = h
icoreg = {}


if os.getComputerLabel() == nil then
  lab = math.random(100000)
  os.setComputerLabel("GemPC-"..tostring(lab))
end

pref["pcname"] = os.getComputerLabel()

local settings = {}

if not fs.exists("/programs") then
  fs.makeDir("/programs")
  fs.makeDir("/programs/icons")
end

if not fs.exists("/data") then
  fs.makeDir("/data")
end

if not fs.exists("/.settings") then
  shell.run("pastebin get khtTEKeW /.settings")
end

if not fs.exists("/programs/lenet") then
  shell.run("pastebin get EQgHhsAA /programs/lenet")
  shell.run("pastebin get LtqRbjn6 /programs/icons/lenet")
end

if not fs.exists("/programs/fman") then
  shell.run("pastebin get huiuVc0V /programs/fman")
  shell.run("pastebin get 9NP17Ev2 /programs/icons/fman")
end

if not fs.exists("/programs/luaint") then
  shell.run("pastebin get RBMbTH66 /programs/luaint")
  shell.run("pastebin get wUwjr0ge /programs/icons/luaint")
end

if not fs.exists("/programs/xterm") then
  shell.run("pastebin get iPuysQxu /programs/xterm")
  shell.run("pastebin get RU9Jcuwr /programs/icons/xterm")
end

if not fs.exists("/.settings") then
  shell.run("pastebin get 5tq5WgFL /.settings")
end

if not fs.exists("/settings") then
  shell.run("pastebin get 1NphnkqB /settings")
end

function loadDeskSettings()
  file = fs.open("/.settings", "r")
  settings = textutils.unserialize(file.readAll())
  file.close()
  pref["background"] = settings["background"]
end


function drawDesktop()
  loadDeskSettings()
  term.setBackgroundColor(settings["background"])
  term.clear()
  term.setCursorPos(1, 1)
  term.setBackgroundColor(colors.white)
  for i=1, pref["w"] do
    term.write(" ")
  end
  term.setTextColor(colors.black)
  term.setCursorPos((pref["w"]/2)-(#pref["pcname"]/2), 1)
  term.write(pref["pcname"])
  term.setCursorPos(1, 1)
  term.setBackgroundColor(colors.lightGray)
  term.write("Menu")
  term.setCursorPos(2, 3)
  term.setBackgroundColor(colors.white)
  x, y = term.getCursorPos()
  for i, k in pairs(fs.list("/programs")) do
    if fs.isDir("/programs/"..k) ~= true then
      if x >= 51 then
        x = 2
        y = y + 7
      end
      term.setCursorPos(x, y)
      ico = paintutils.loadImage("/programs/icons/"..k)
      paintutils.drawImage(ico, x, y)
      term.setCursorPos(x, y+5)
      term.setBackgroundColor(settings["background"])
      term.write(string.sub(k, 1, 5))
      for i=x, x+4 do
        for b=y, y+4 do
          icoreg[tostring(i).." "..tostring(b)] = "/programs/"..k
        end
      end
      x = x + 6
    end
  end
end

function drawMenu()
  term.setCursorPos(1, 2)
  term.setBackgroundColor(colors.lightGray)
  term.setTextColor(colors.black)
  term.setTextColor(colors.red)
  term.write("Spegni      ")
  term.setCursorPos(1, 3)
  term.setTextColor(colors.yellow)
  term.write("Riavvia     ")
  term.setCursorPos(1, 4)
  term.setTextColor(colors.black)
  term.write("Impostazioni")
end

function drawClock()
  term.setBackgroundColor(colors.white)
  term.setCursorPos(pref["w"]-#textutils.formatTime(os.time(), true), 1)
  term.setTextColor(colors.black)
  term.write(textutils.formatTime(os.time(), true))
end

function getInput()
  menu = false
  while true do
    if not menu then
      drawDesktop()
    end
    drawClock()
    timerclock = os.startTimer(1)
    _, bt, x, y = os.pullEventRaw()
    if _ == "timer" and bt == timerclock then
      drawClock()
    end
    if _ == "terminate" then
      if settings["terminable"] then
        term.setBackgroundColor(colors.black)
        term.clear()
        term.setCursorPos(1, 1)
        if settings["live"] then
        for i, k in pairs(fs.list("/data")) do
          fs.delete("/data/"..k)
        end
        end
        return
      end
    end
    if bt == 1 and _ == "mouse_click" and x >= 1 and x <= 4 and y == 1 then
        if menu then
          drawDesktop()
          drawClock()
          menu = false
        else
          drawDesktop()
          drawMenu()
          drawClock()
          menu = true
        end
    elseif bt == 1 and _ == "mouse_click" and x >= 1 and x <= 12 and menu and y >= 2 and y <= 4 then
      if y == 2 then
        if settings["live"] then
          for i, k in pairs(fs.list("/data")) do
            fs.delete("/data/"..k)
          end
        end
        os.shutdown()
      elseif y == 3 then
        if settings["live"] then
          for i, k in pairs(fs.list("/data")) do
            fs.delete("/data/"..k)
          end
        end
        os.reboot()
      elseif y == 4 then
        menu = false
        shell.run("/settings")
        loadDeskSettings()
        drawDesktop()
      end
    elseif _ == "mouse_click" then
      if icoreg[tostring(x).." "..tostring(y)] ~= nil then
        shell.run(icoreg[tostring(x).." "..tostring(y)])
      end
      menu = false
    end
  end
end

getInput()