# We are creating a script that runs when the game starts.
# This script will hold our logic.
using { /Fortnite.com/Devices }
using { /Fortnite.com/Characters }
using { /Fortnite.com/AI }
using { /UnrealEngine.com/Temporary/SpatialMath }
using { /Verse.org/Simulation }

# This is our main script structure.
# Think of it as the "Brain" of our island feature.
loot_goblin_behavior := class(creative_device):

    # Wire these up in the UEFN Details panel by selecting your placed devices.
    # Drag your NPC device into the first slot, your trigger into the second.
    @editable
    Goblin : npc_spawner_device = npc_spawner_device{}

    @editable
    Trigger : trigger_device = trigger_device{}

    # This function runs once when the island loads.
    OnBegin<override>()<suspends> : void =
        # 4. CONNECT THE EVENT
        # We want this code to run when someone enters the trigger.
        # TriggeredEvent is the event that fires when a player activates the trigger.
        Trigger.TriggeredEvent.Subscribe(OnTriggerActivated)

    # This function is called when the trigger fires.
    # 'Agent' is the player who walked in.
    OnTriggerActivated(Agent : agent) : void =
        # 1. FIND THE NPC
        # GetAgents asks the spawner for the NPCs it spawned.
        # We grab the first one if available, so we use an if-block.
        Agents := Goblin.GetAgents()
        if (GoblinAgent := Agents[0]):

            # 2. GET THE NAVIGATABLE INTERFACE
            # This is the magic line. We ask the goblin for its movement controller.
            # If the goblin doesn't have navigation, this fails silently inside the if-block.
            if (GoblinCharacter := GoblinAgent.GetFortCharacter[]):
                if (GoblinNav := GoblinCharacter.GetNavigatable[]):

                    # 3. GET THE PLAYER'S POSITION
                    # Cast 'Agent' to a fort_character so we can call GetTransform().
                    if (PlayerCharacter := Agent.GetFortCharacter[]):
                        TargetPosition := PlayerCharacter.GetTransform().Translation

                        # Create a Navigation Target from that position.
                        # A Navigation Target is just a waypoint in the game world.
                        NavTarget := MakeNavigationTarget(TargetPosition)

                        # 5. TELL THE GOBLIN TO MOVE!
                        # NavigateTo is a suspends function, so we spawn a concurrent task for it.
                        # This lets the rest of the island keep running while the goblin walks.
                        spawn{ GoblinNav.NavigateTo(NavTarget) }

                        Print("Goblin has been dispatched!")