@using Sandbox;
@using Sandbox.UI;
@inherits PanelComponent
@namespace Sandbox

<root>
	<div class="body @(isPaused?"fadeNow":"")">
		<p>`Game` API</p>
		<p>AppId = @Game.AppId</p>
		<p>InGame = @Game.InGame</p>
		<p>IsEditor = @Game.IsEditor</p>
		<p>Ident = @Game.Ident</p>
		<p>IsMainMenuVisible = @Game.IsMainMenuVisible</p>
		<p>IsRecordingVideo = @Game.IsRecordingVideo</p>
		<p>IsClosing (Get-Set) = @Game.IsClosing</p>
		<p>IsRunningInVR = @Game.IsRunningInVR</p>
		<p>IsRunningOnHandheld (Get-InternalSet) = @Game.IsRunningOnHandheld</p>
		<p>Random = @Game.Random (a class, use it such as `new System.Random.*()`)</p>
		<p>SteamId = ***** (Sorry, that'd reveal yours!)</p>
		<p>CheatsEnabled (Get-Set) = @Game.CheatsEnabled (cvar `sv_cheats`)</p>
		<p>IsPlaying (Get-InternalSet) = @Game.IsPlaying</p>
		<p>IsPaused = @Game.IsPaused</p>
		<!--<p>Overlay.IsOpen = @IsOpen</p>-->
		<!--<p>Overlay.IsPauseMenuOpen = @IsPauseMenuOpen</p>-->
		<p>Usage: `Game.*`, where `*` is one of the above variables.</p>
		<p> see: </p>
		<p>https://github.com/Facepunch/sbox-public/blob/master/engine/Sandbox.Engine/Game/Game/Game.cs</p>
		<p> & also there's extra methods beside this file. </p>
	</div>
</root>

@code
{

	[Property, TextArea] public string MyStringValue { get; set; } = "Hello World!";
	[Property] protected StartMenu? theMenu {get;set;}
	public bool isPaused {get; internal set;}

	protected override void OnStart()
	{
		if(!theMenu.IsValid())
		{
			theMenu = Scene.Directory.FindByName( "ScreenMenu" ).First().GetComponent<StartMenu>();
		}
		if(theMenu.IsValid())
		{
			//TODO: subscribe to pause signal
		}
	}

	protected override void OnUpdate()
	{
		//TODO: use ala-Godot signal system instead to subscribe and listen paused event
		if(theMenu.IsValid())
		{
			// IDEA: make this more elegant! only change when that change! idk how!
			if(theMenu.isPaused)
			{
				if(!isPaused) isPaused = true;
			} else
			{
				if(isPaused) isPaused = false;
			}
		}
	}

	/// <summary>
	/// the hash determines if the system should be rebuilt. If it changes, it will be rebuilt
	/// </summary>
	protected override int BuildHash() => System.HashCode.Combine(
		Game.AppId,
		Game.InGame,
		Game.IsEditor,
		Game.Ident,
		Game.IsMainMenuVisible,
		Game.IsRecordingVideo,
		Game.IsClosing,
		""
	);

	// https://github.com/Facepunch/sbox-public/blob/master/engine/Sandbox.Engine/Game/Game/Game.Overlay.cs
}