# This is a Verse script. It controls a game device.
using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }
using { /Verse.org/Native }
using { /UnrealEngine.com/Temporary/Diagnostics }

# This is our main device. It is like the brain.
# It wires up to a trigger_device and a customizable_light_device
# placed on the island in the UEFN editor.
ball_sensor_manager := class(creative_device):

    # Wire this to a Trigger Device in the UEFN editor.
    # The trigger device watches the area where the ball rolls.
    @editable
    BallTrigger : trigger_device = trigger_device{}

    # Wire this to a Customizable Light Device in the UEFN editor.
    # This is the light that turns on when the ball arrives.
    @editable
    Light : customizable_light_device = customizable_light_device{}

    # OnBegin runs when the game starts.
    # Think of it as the "start" button being pressed.
    OnBegin<override>()<suspends> : void =
        # We tell the trigger to listen.
        # It watches for anything to enter its space,
        # including physics props rolling into the volume.
        # note: Verse trigger_device fires TriggeredEvent for
        # players; for physics prop overlap, enable
        # "Physics Events Enabled" on the trigger in the editor.
        BallTrigger.TriggeredEvent.Subscribe(OnBallEntered)

    # This function runs when the trigger fires.
    # The agent is the thing that set off the trigger.
    OnBallEntered(Agent : ?agent) : void =
        # If the ball enters, turn on the light!
        # This is like flipping a switch.
        Light.TurnOn()

        # Print a message to the log.
        # This helps us know it worked.
        Print("The ball hit the sensor!")