// (c) Copyright HutongGames, LLC 2010-2018. All rights reserved.

using UnityEngine;

namespace HutongGames.PlayMaker.Actions
{
	[ActionCategory(ActionCategory.UI)]
	[Tooltip("Sets the source image sprite of a UI Image component.")]
	public class UiImageSetSprite : ComponentAction<UnityEngine.UI.Image>
	{
		[RequiredField]
		[CheckForComponent(typeof(UnityEngine.UI.Image))]
		[Tooltip("The GameObject with the Image UI component.")]
		public FsmOwnerDefault gameObject;

		[RequiredField]
		[Tooltip("The source sprite of the UI Image component.")]
		[ObjectType(typeof(Sprite))]
		public FsmObject sprite;

		[Tooltip("Reset when exiting this state.")]
		public FsmBool resetOnExit;

	    private UnityEngine.UI.Image image;
	    private Sprite originalSprite;

		public override void Reset()
		{
			gameObject = null;
			resetOnExit = false;
		}
		
		public override void OnEnter()
		{
			var go = Fsm.GetOwnerDefaultTarget(gameObject);
			if (UpdateCache(go))
			{
				image = cachedComponent;
			}
			
		    originalSprite = image.sprite;

			DoSetImageSourceValue();

			Finish();
		}

	    private void DoSetImageSourceValue()
		{
			if (image==null) return;

			image.sprite = sprite.Value as Sprite;
		}

		public override void OnExit()
		{
			if (image==null)
			{
				return;
			}

			if (resetOnExit.Value)
			{
				image.sprite = originalSprite;
			}
		}
		
	}
}