# Import the necessary Fortnite devices
using { /Fortnite.com/Devices }

# Define our main device type. 
# This acts as the "brain" that connects the Tracker and Accolades.
SlayerChallenge := class(creative_device):
    # These are references to the devices we placed in the editor.
    # Think of these as "wires" we’ll connect in the editor.
    Tracker: tracker_device = tracker_device{}
    Accolades: accolades_device = accolades_device{}

    # This function runs when the game starts.
    OnBegin<override>()<suspends>: void=
        # We need to listen for when the Tracker hits its goal.
        # The Tracker emits an event called 'GoalReached' on a specific channel.
        # We'll use Channel 1 for this challenge.
        
        # Subscribe to the Tracker's GoalReached event.
        # When the tracker hits 3 kills, this lambda (anonymous function) runs.
        Tracker.GoalReached.Subscribe(
            func(player: player, channel: int): void=
                # Check if the signal came from our specific channel (Channel 1)
                if channel == 1:
                    # Award the accolade to the player who triggered it.
                    # This is where the XP gets handed out.
                    Accolades.Award(player, "Slayer of Ice")
        )