elevator client

local logo = {
  "   ___  ",
  "  / _ \\ ",
  " / , _/",
  "/_/|_/"
}

-- Configuration
local configFileName = "elevator_config.txt"
local computerID = os.getComputerID()
local config = {channel = "", currentFloor = "", computerID = ""}

local modem = peripheral.find("modem")

local monitorLeft = peripheral.wrap("left")
local monitorRight = peripheral.wrap("right")
local monitorTop = peripheral.wrap("top")

monitorTop.setTextScale(1)
monitorTop.setTextColour(colours.green)
monitorRight.setTextScale(1)
monitorRight.setTextColour(colours.purple)
monitorLeft.setTextScale(1)
monitorLeft.setTextColour(colours.purple)

local lastButtonPress = 0
local cooldown = 2  -- 2-second cooldown
local lastIdleTime = 0  -- Time when the last "idle" message was sent
local idleCooldown = 2  -- 1-second cooldown for "idle" message

-- Save Config to file
local function saveConfig(config)
  local configData = textutils.serializeJSON(config)
  local file = fs.open(configFileName, "w")
  file.write(configData)
  file.close()
end

-- Load Config from file
local function loadConfig()
  if fs.exists(configFileName) then
      local file = fs.open(configFileName, "r")
      local configData = file.readAll()
      file.close()
      local loadedConfig = textutils.unserializeJSON(configData)
      config = loadedConfig
  end
end

local function refreshTopMonitor()
  monitorTop.clear()
  monitorTop.setCursorPos(1, 1)
end

local function centerText(monitor, text)
  local width, height = monitor.getSize()
  local x = math.ceil((width - #text) / 2)
  local y = math.ceil(height / 2)
  monitor.setCursorPos(x, y)
  monitor.write(text)
end

local function displayLogo(monitor, logo, color)
  refreshTopMonitor()
  monitor.setTextColour(color)
  local _, height = monitor.getSize()
  local yStart = math.ceil(height / 2) - math.ceil(#logo / 2)

  for y, line in ipairs(logo) do
    monitor.setCursorPos(1, yStart + y - 1)
    monitor.write(line)
  end
end

centerText(monitorLeft, "Up")
centerText(monitorRight, "Down")

local function handleTouch(side, x, y)
    local currentTime = os.epoch("utc")
    if currentTime - lastButtonPress >= cooldown * 1000 then
        if side == "left" then
            modem.transmit(config.channel, config.channel + 1, "up")
            idleSent = false
        elseif side == "right" then
            modem.transmit(config.channel, config.channel + 1, "down")
            idleSent = false
        end
        lastButtonPress = currentTime
    else
        print("Button press ignored due to cooldown.")
    end
end

local function mainLoop(config)
  local idleFlag = true  -- Add this flag to control when to send "idle"

  while true do
    local event, side, x, y, senderChannel, replyChannel, message, senderDistance = os.pullEventRaw()
    local currentTime = os.epoch("utc") / 1000  -- Get current time in seconds

    if event == "redstone" then
      if idleFlag and (currentTime - lastIdleTime >= idleCooldown) then
        modem.transmit(config.channel, config.channel + 1, "idle:" .. config.currentFloor)
        displayLogo(monitorTop, logo, colours.green)
        print("Elevator floor: " .. config.currentFloor)
        lastIdleTime = currentTime  -- Update the last idle time
      end
    else
      displayLogo(monitorTop, logo, colours.purple)
    end

    if event == "monitor_touch" then
      idleFlag = false  -- Reset the idle flag upon touch
      handleTouch(side, x, y)
      lastIdleTime = currentTime  -- Update the last idle time here as well
    else
      idleFlag = true  -- Set the idle flag for other events
    end
  end
end


-- Initialization
local function initializeClient()
  loadConfig()
  if not config.channel or config.channel == "" then
      print("Please enter the channel to use:")
      config.channel = tonumber(read())
  end
  if not config.currentFloor or config.currentFloor == "" then
      print("Please enter the current floor:")
      config.currentFloor = tonumber(read())
  end
  if not config.computerID then
      config.computerID = computerID
  end
  saveConfig(config)
  mainLoop(config)
end

-- Entry Point
initializeClient()