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

<root>
	<header>
		<h1>UPGRADE SHOP</h1>
	</header>
	<p class="smaller">You have @Currency goodies to spend! More upgrades may appear later...</p>

	<div class="items">
		@foreach (var upgrade in Upgrades)
		{
			<ShopUpgrade Upgrade=@upgrade Currency:bind=@Currency UpgradeList=@Upgrades Purchase=@Purchase></ShopUpgrade>
		}
	</div>
	<div class="empty"></div>
	<button id="continue" onclick=@((e) => CloseShop())>I'm ready.</button>
</root>

@code
{
	[Property]
	public List<Upgrade> Upgrades { get; set; } = [];

	[Property]
	public SoundEvent Purchase { get; set; }

	protected override void OnEnabled()
	{
		base.OnEnabled();

		// move mouse to middle of screen every time shop opens
		Mouse.Position = Screen.Size / 2;

		// pause the game
		Scene.TimeScale = 0;
	}

	protected override void OnDisabled()
	{
		base.OnDisabled();

		// resume the game
		Scene.TimeScale = 1;
	}

	private void CloseShop()
	{
		GameObject.Enabled = false;
	}

	public int Currency
	{
		get
		{
			return Scene.Get<ShopSystem>().Currency;
		}
		set
		{
			Scene.Get<ShopSystem>().Currency = value;
		}
	}

	/// <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( Currency, Upgrades );
}