-- Countdown to every 4 hours after 2 AM
-- Display "Time Until Server Restart" (hh:mm:ss) on a single 2x2 screen

-- Wrap the single 2x2 screen on top
local screen = peripheral.wrap("top")

-- Function to format time as hh:mm:ss
function formatTime(seconds)
    local hours = math.floor(seconds / 3600)
    local minutes = math.floor((seconds % 3600) / 60)
    local secs = seconds % 60
    return string.format("%02d:%02d:%02d", hours, minutes, secs)
end

-- Function to calculate seconds until next interval
function getSecondsUntilNextInterval()
    local currentHour = os.time("UTC") % 24 -- Get current hour from 0 to 23
    local intervals = {4, 10, 18, 22} -- Interval hours

    -- Find the next interval
    local nextIntervalHour = intervals[1]
    for _, hour in ipairs(intervals) do
        if currentHour < hour then
            nextIntervalHour = hour
            break
        end
    end

    -- Calculate the number of hours until the next interval
    local hoursUntilNextInterval = (nextIntervalHour - currentHour + 24) % 24
    local secondsUntilNextInterval = hoursUntilNextInterval * 3600

    return secondsUntilNextInterval
end

-- Function to clear the screen
function clearScreen()
    screen.clear()
    screen.setCursorPos(1, 1)
end

-- Function to display text on the 2x2 screen
function displayOnScreen(text)
    clearScreen()
    screen.write(text)
end

-- Main loop to update the countdown
while true do
    local secondsRemaining = getSecondsUntilNextInterval()
    local timeFormatted = formatTime(secondsRemaining)

    -- Display the countdown
    displayOnScreen("Time Until Server Restart: " .. timeFormatted)

    -- Update every second
    sleep(0.1)
end