# This is a Verse Script. Think of it as the "Brain" attached to a device.
# We import the necessary tools from Fortnite's library.
using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }
using { /Verse.org/Native }

# This is our "Device" class. It's like a template for our specific button.
# In the Scene Graph, this script will live on the Button entity.
RevengeButton := class(creative_device):

    # This is a "Variable". It's a container for data.
    # Here, it holds a reference to the Button device we placed in the editor.
    # We will connect this in the UEFN editor by selecting the device in the
    # Verse Device's property panel.
    # button_device is the real Verse type for a placeable Button device.
    @editable
    MyButton : button_device = button_device{}

    # This holds a reference to the Timer device we placed.
    # timer_device is the real Verse type for a placeable Timer device.
    @editable
    MyTimer : timer_device = timer_device{}

    # This is a "Function". It's a set of instructions.
    # The name "OnBegin" is special. It runs once when the island starts.
    OnBegin<override>()<suspends> : void =
        # We tell the script to listen for the Button being activated.
        # InteractedWithEvent is the real listenable event on button_device.
        # Subscribe registers a callback that fires every time the event occurs.
        MyButton.InteractedWithEvent.Subscribe(HandlePress)

        # Suspend forever so our subscriptions stay alive for the whole session.
        loop:
            Sleep(Infinity)

    # This function runs whenever the button is pressed.
    # button_device.InteractedWithEvent passes the interacting agent, so we
    # accept a ?agent parameter here (it can be false if no agent is found).
    HandlePress(Source : ?agent) : void =
        # Source is the agent (player) who pressed the button.
        # We want to start the Timer device so its countdown begins.
        # Reset() rewinds the timer to its configured duration,
        # then Start() begins the countdown.
        MyTimer.Reset()
        MyTimer.Start()

    # No extra code is needed to trigger the Item Granter here because we
    # wired the Timer's Output Channel to the Item Granter's Channel in the
    # editor. When the timer expires it broadcasts on that channel and the
    # Item Granter reacts automatically.
    # This is the power of Devices: they talk to each other without code.