using { /Fortnite.com/Devices }
using { /Fortnite.com/Characters }
using { /Fortnite.com/FortPlayerUtilities }
using { /Verse.org/Simulation }
using { /UnrealEngine.com/Temporary/Diagnostics }

# Create a new Verse device. Think of this as a "Brain" attached to a device.
# It lives in the world and reacts to events.
powder_processor := class(creative_device):

    # Wire this to a Trigger device placed in your UEFN scene.
    # Players walk into the trigger to start the crafting check.
    @editable
    CraftTrigger : trigger_device = trigger_device{}

    # Wire this to an Item Granter device set to grant a Shield Potion.
    # The Item Granter handles the actual item delivery to the player.
    @editable
    RewardGranter : item_granter_device = item_granter_device{}

    # Wire this to an Item Remover device configured to remove
    # Rough Mineral Powder (quantity 1) from the player's inventory.
    @editable
    PowderRemover : item_remover_device = item_remover_device{}

    # OnBegin runs once when the island loads — your "Start Game" event.
    OnBegin<override>()<suspends> : void =
        # Subscribe to the trigger's TriggeredEvent so we react every
        # time a player walks into the trigger zone.
        CraftTrigger.TriggeredEvent.Subscribe(OnPlayerTriggered)

        # Keep the coroutine alive so subscriptions stay active.
        Sleep(Inf)

    # This function fires each time the trigger is activated by a player.
    OnPlayerTriggered(TriggeringAgent : ?agent) : void =
        # Cast the generic agent to a fort_character so we can act on them.
        # The `if` here is a safe cast — it only runs if the cast succeeds.
        if (Agent := TriggeringAgent?):
            if (Player := Agent.GetFortCharacter[]):
                # Item Granter delivers the Shield Potion reward to the player.
                # Configure the Item Granter device in the editor to grant
                # 1x Shield Potion. GrantItem() targets the triggering player.
                RewardGranter.GrantItem(Agent)

                # Item Remover consumes the Mineral Powder crafting cost.
                # Configure the Item Remover device in the editor to remove
                # 1x Rough Mineral Powder. Remove() targets the triggering player.
                PowderRemover.Remove(Agent)

                # Print a confirmation to the UEFN output log.
                # In a shipped map swap this for a UI device message instead.
                Print("Crafted! You traded powder for a shield.")