# Import basic Verse tools
using { /Fortnite.com/Devices }
using { /Verse.org/Simulation }
using { /UnrealEngine.com/Temporary/Diagnostics }

# Define the shape of our player data
# This is like a template for the notebook page
player_data := struct:
    Score : int = 0        # Start with 0 points
    Items : []string = array{}  # Start with no items
    Version : int = 1      # The sticker version

# A device class that manages player data resets.
# Place one instance of this device on your island.
player_reset_manager := class(creative_device):

    # This is our shared locker room (weak_map)
    # It holds data for every player who joins
    # note: weak_map keys on player identity; data is cleared if the player leaves.
    var PlayerLockers : weak_map(player, player_data) = map{}

    # Called automatically by UEFN when the device starts
    OnBegin<override>()<suspends> : void =
        # Subscribe to the player-joined event for this session
        GetPlayspace().PlayerAddedEvent().Subscribe(OnPlayerJoined)

    # This function resets a player's data
    # Think of it as erasing the notebook page
    ResetPlayerData(P : player) : void =
        # Create a fresh, empty data template
        FreshData := player_data{}
        # Put the fresh data into the player's locker
        # This overwrites any old data
        if (set PlayerLockers[P] = FreshData) {}

    # This event runs when a player joins the island
    OnPlayerJoined(P : player) : void =
        # Check if the player already has a locker
        if (CurrentData := PlayerLockers[P]):
            # Locker exists. Check the version sticker.
            # If the version is old (0), reset the data.
            # We use 0 to mean "no version set yet."
            if (CurrentData.Version = 0):
                ResetPlayerData(P)
        else:
            # No locker exists. Create one with default data.
            if (set PlayerLockers[P] = player_data{}) {}