-- ComputerCraft
-- Writes text to a minecraft create display based on redstone inputs
print("Starting Display")

-- Set up the display
local display = peripheral.wrap("top") -- Wrap the display on top of the computer
if not display then
    print("No display found")
    return
end

display.clear() -- Clear the display
display.setCursorPos(1, 1) -- Set the cursor position to the top left corner
display.write("Display ready!") -- Write a message to the display
display.update() -- Update the display to show the message

-- Wait for 4 seconds before clearing the display
os.sleep(4)
display.clear() -- Clear the display
display.update() -- Update the display to show the cleared screen

local previous_state = nil -- Variable to store the previous state

while true do
    local active_hostile = redstone.getInput("back")
    local active_neutral = redstone.getInput("front")
    local active_spawnDelay = redstone.getInput("right")
    local active_chicken = redstone.getInput("bottom")
    local active_missing = redstone.getInput("left")

    -- log the states to the console

    print("Hostile: " .. tostring(active_hostile))
    print("Neutral: " .. tostring(active_neutral))
    print("Spawn Delay: " .. tostring(active_spawnDelay))
    print("Chicken: " .. tostring(active_chicken))
    print("Missing: " .. tostring(active_missing))

    local state_spawning = active_spawnDelay
    local state_chicken = active_chicken
    local state_killing = active_hostile and not active_spawnDelay and not active_chicken
    local state_clearing = active_neutral and not state_killing and not state_chicken
    local state_missing = active_missing
    local state_idle = not state_spawning and not state_killing and not state_clearing and not state_missing and
                           not state_chicken

    local current_state = nil -- Variable to store the current state
    if state_spawning then
        current_state = "Spawning Wither"
    elseif state_killing then
        current_state = "Killing Wither"
    elseif state_chicken then
        current_state = "Deploying Chicken"
    elseif state_clearing then
        current_state = "Clearing Chamber"
    elseif state_missing then
        current_state = "Missing Resources"
    elseif state_idle then
        current_state = "Idle..."
    end

    if current_state == previous_state then
        -- If the state hasn't changed, skip the display update
        print("State hasn't changed, skipping display update")
        os.sleep(1) -- Sleep for 1 second before checking the states again
        goto continue -- Skip to the next iteration of the loop
    end
    previous_state = current_state -- Update the previous state
    print("State changed to: " .. current_state) -- Log the state change to the console

    -- Display the states on the screen
    display.clear() -- Clear the display
    display.setCursorPos(1, 1) -- Set the cursor position to the top left corner
    display.write("State:") -- Write a message to the display
    display.setCursorPos(1, 2) -- Move the cursor to the next line
    display.write(current_state) -- Write the current state to the display
    display.update() -- Update the display to show the current state

    -- Sleep for 1 second before checking the states again
    os.sleep(1)

    ::continue:: -- Label to skip to the next iteration of the loop
end