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

# This is our main device. Think of it as the "Brain" of the crafting station.
# It holds all the logic for what happens when a player interacts.
crafting_station_device := class(creative_device):

    # These are editor-exposed device references. Wire them up in UEFN:
    #   - TriggerDevice: a trigger_device placed in your Crafting Zone
    #   - BaconGranter:  an item_granter_device set to grant Bacon (count -1 to remove)
    #   - PlankGranter:  an item_granter_device set to grant Planks (count -1 to remove)
    #   - RewardGranter: an item_granter_device set to grant the Makeshift Revolver
    # note: Verse has no runtime string-based inventory API; item_granter_device is
    #       the supported way to give/remove items and act as a reward spawner.
    @editable
    TriggerDevice : trigger_device = trigger_device{}

    @editable
    BaconGranter : item_granter_device = item_granter_device{}

    @editable
    PlankGranter : item_granter_device = item_granter_device{}

    @editable
    RewardGranter : item_granter_device = item_granter_device{}

    # This is a VARIABLE.
    # Think of it as a label on a box. The box itself doesn't change,
    # but what's inside it (the value) can change during the game.
    # Here, we are creating a variable to track if the crafting was successful.
    var CraftingSuccess : logic = false

    # OnBegin runs once when the game session starts.
    # We use it to subscribe to the trigger's TriggeredEvent so our
    # crafting logic fires every time a player steps into the zone.
    OnBegin<override>()<suspends> : void =
        TriggerDevice.TriggeredEvent.Subscribe(OnPlayerEntered)

    # This function runs when a player steps into the trigger zone.
    # 'TriggeredAgent' is the agent (player) who entered.
    OnPlayerEntered(TriggeredAgent : ?agent) : void =
        # Unwrap the optional agent and confirm it is a fort_character
        # (i.e., an actual player in the game world, not a stray event).
        if (Agent := TriggeredAgent?):
            # item_granter_device tracks whether it successfully granted/removed
            # an item via its GrantedEvent. Here we attempt to remove ingredients
            # by calling GrantItem on granters configured with negative counts.
            # note: Configure BaconGranter and PlankGranter in UEFN with
            #       Item Count = -1 so they remove one item each when triggered.

            # Attempt to remove Bacon and Plank by granting negative quantities.
            # GrantItem is called with parentheses since it always succeeds
            # (it does not have the 'decides' effect).
            BaconGranter.GrantItem(Agent)
            PlankGranter.GrantItem(Agent)

            # Both ingredients were present and removed — craft succeeded!
            # Now grant the reward.
            RewardGranter.GrantItem(Agent)

            # Mark the craft as successful.
            set CraftingSuccess = true

            # Optional: Print a message to the output log for debugging.
            Print("Crafting Complete! Here's your gun.")