-- BIOS environment for Open OS Recovery

-- Function to print a message to the screen
local function printMessage(message)
  local gpu = component.list("gpu")() -- Get the GPU component
  local screen = component.list("screen")() -- Get the screen component
  if gpu and screen then
    component.invoke(gpu, "bind", screen) -- Bind GPU to screen
    component.invoke(gpu, "set", 1, 1, message) -- Print message on screen
  end
end

-- Function to clear the screen
local function clearScreen()
  local gpu = component.list("gpu")()
  if gpu then
    component.invoke(gpu, "setBackground", 0x000000)
    component.invoke(gpu, "setForeground", 0xFFFFFF)
    component.invoke(gpu, "fill", 1, 1, 80, 25, " ")
  end
end

-- Function to display the menu
local function showMenu()
  clearScreen()
  printMessage("Open OS Recovery Environment\n")
  printMessage("1. Boot Open OS disk - run boot code\n")
  printMessage("2. Backup User data - copy /home/ data of Open OS labeled disk to the Unnamed drive\n")
  printMessage("3. Restore - restore the /home/ dir of unnamed drive to Open OS disk\n")
  printMessage("Select an option (1/2/3): ")
end

-- Function to read user input
local function readInput()
  local input = ""
  local address = component.list("keyboard")()
  if address then
    local keyboard = component.proxy(address)
    repeat
      local event, char = computer.pullSignal()
      if event == "key_down" then
        input = input .. char
        if char == 13 then -- Enter key
          break
        end
      end
    until false
  end
  return input
end

-- Function to boot Open OS disk
local function bootOpenOS()
  printMessage("Booting Open OS disk...\n")
  local eeprom = component.list("eeprom")()
  if eeprom then
    local address = component.invoke(eeprom, "getData")
    if address then
      printMessage("Boot address found: " .. address .. "\n")
      -- Simulate booting from the address
      computer.beep(1000, 0.1)
    else
      printMessage("No boot address found.\n")
    end
  else
    printMessage("EEPROM component not found.\n")
  end
end

-- Function to backup user data
local function backupUserData()
  printMessage("Backing up user data...\n")
  local openOSDisk = component.list("filesystem")()  -- Replace with actual disk component
  local backupDrive = component.list("filesystem")() -- Replace with actual backup drive component

  if openOSDisk and backupDrive then
    local sourceDir = "/home/"
    local destDir = "/backup/"
    -- Simulate file copy
    printMessage("Copying data from " .. sourceDir .. " to " .. destDir .. "...\n")
    -- Implement actual file copy logic here
  else
    printMessage("Required components for backup not found.\n")
  end
end

-- Function to restore user data
local function restoreUserData()
  printMessage("Restoring user data...\n")
  local openOSDisk = component.list("filesystem")()  -- Replace with actual disk component
  local backupDrive = component.list("filesystem")() -- Replace with actual backup drive component

  if openOSDisk and backupDrive then
    local sourceDir = "/backup/"
    local destDir = "/home/"
    -- Simulate file copy
    printMessage("Restoring data from " .. sourceDir .. " to " .. destDir .. "...\n")
    -- Implement actual file restore logic here
  else
    printMessage("Required components for restore not found.\n")
  end
end

-- Main program loop
while true do
  showMenu()
  local choice = readInput()

  if choice == "1" then
    bootOpenOS()
  elseif choice == "2" then
    backupUserData()
  elseif choice == "3" then
    restoreUserData()
  else
    printMessage("Invalid option, please try again.\n")
  end

  printMessage("Press Enter to return to the menu.\n")
  readInput()
end