@namespace CitySim.Punchboard
@using Sandbox.UI
@inherits Panel

<root class="pb-slot @CssClass @(Empty ? "empty" : "")">
	@if ( !Empty )
	{
		<div class="pb-slot-icon"><PbIcon Icon=@Icon /></div>
		@if ( Count > 1 )
		{
			<div class="pb-slot-count">@($"×{Count}")</div>
		}
	}
</root>

@code
{
	[Parameter] public string Icon { get; set; }
	[Parameter] public string CssClass { get; set; }

	/// <summary>Shows a count badge when above 1. Changing it plays a pop.</summary>
	[Parameter] public int Count { get; set; } = 1;

	/// <summary>An empty slot is drawn dashed and dim.</summary>
	[Parameter] public bool Empty { get; set; }

	/// <summary>Text shown by the engine tooltip.</summary>
	[Parameter] public string TooltipText { get; set; }

	/// <summary>Called when the pointer or keyboard focus lands on the slot, for custom tooltips.</summary>
	[Parameter] public Action Inspected { get; set; }

	int lastCount;
	float pop = 1f;

	protected override void OnParametersSet()
	{
		base.OnParametersSet();
		AcceptsFocus = !Empty;
		Tooltip = Empty ? null : TooltipText;
		TooltipClass = "city-tooltip";
		if ( lastCount != Count && lastCount != 0 ) pop = 0f;
		lastCount = Count;
	}

	protected override void OnMouseOver( MousePanelEvent e ) { base.OnMouseOver( e ); if ( !Empty ) Inspected?.Invoke(); }
	protected override void OnFocus( PanelEvent e ) { base.OnFocus( e ); if ( !Empty ) Inspected?.Invoke(); }

	public override void Tick()
	{
		base.Tick();
		if ( pop >= 1f ) return;
		pop = Math.Min( 1f, pop + Time.Delta / 0.25f );
		Style.Set( "transform", $"scale({Pb.F( 0.8f + 0.2f * Pb.BackOut( pop ) )})" );
	}

	protected override int BuildHash() => HashCode.Combine(GameText.LanguageCode, HashCode.Combine( Icon, Count, Empty, TooltipText, CssClass ));
}