# Import the Verse library for basic functionality
using /Fortnite.com/Verse

# Import the Fortnite-specific libraries
using /Fortnite.com/FortniteVerse

# Import the UI library for Billboards
using /Fortnite.com/FortniteUI

# Define our Lobby Script
LobbyScript := class(VerseScript):
    # This is a "Variable" - a container for data.
    # Think of it like a Loot Box. It holds something (the rule text).
    LobbyRules : string = "WAIT FOR START! RULES: NO BUILDING."
    
    # This is a "Function" - a block of code that does something.
    # Think of it like a "Healing Item." You use it, and it fixes your health.
    # Here, we use it to update the Billboard.
    UpdateRules := func():
        # Find the Billboard device by its name (set in UEFN)
        # This is like finding a specific prop in your inventory.
        billboard := Self.GetDevice("MainBillboard") as BillboardDevice
        
        # If we found the billboard, update its text
        if billboard != None:
            # Set the text property
            billboard.SetText(LobbyRules)
            
    # This is an "Event" - it runs automatically when something happens.
    # Think of this like a "Storm Timer." When the timer hits zero, the storm closes.
    # Here, the event is "OnBegin," which runs when the game starts.
    OnBegin := func():
        # Call our UpdateRules function
        UpdateRules()
        
        # Now, let's listen for when the game phase changes.
        # We want to change the rules when the game actually starts.
        # This is like a "Trigger" that activates when the match begins.
        Self.OnPhaseChanged.Add(func(phase: GamePhase):
            if phase == GamePhase::Playing:
                # The game has started! Change the rules.
                LobbyRules = "GAME ON! BUILD EVERYTHING!"
                UpdateRules()
            else:
                # We're back in the lobby.
                LobbyRules = "WAIT FOR START! RULES: NO BUILDING."
                UpdateRules()
        )