using System;
using Tweening;
using UnityEngine;
using UnityEngine.Events;
using UnityEngine.UI;

namespace CIG
{
	public class ScrollbarTweener : MonoBehaviour
	{
		private void Start()
		{
			this._scrollRect.onValueChanged.AddListener(new UnityAction<Vector2>(this.OnScrollRectValueChanged));
			this._tweener.FinishedPlaying += this.OnTweenerFinishedPlaying;
		}

		private void OnEnable()
		{
			if (this._startHidden)
			{
				this._canvasGroup.alpha = 0f;
				this._canvasGroup.interactable = false;
			}
			else
			{
				this.OnScrollRectValueChanged(this._scrollRect.normalizedPosition);
			}
		}

		private void LateUpdate()
		{
			this._scrollBar.size = Mathf.Clamp(this._scrollBar.size, this._minHandleSize, this._maxHandleSize);
		}

		private void OnDestroy()
		{
			this._scrollRect.onValueChanged.RemoveListener(new UnityAction<Vector2>(this.OnScrollRectValueChanged));
			this._tweener.FinishedPlaying -= this.OnTweenerFinishedPlaying;
		}

		public void OnScrollRectValueChanged(Vector2 scrollPosition)
		{
			if (this._tweener.IsPlaying)
			{
				this._tweener.Stop();
			}
			this._tweener.Reset(false);
			this._canvasGroup.interactable = true;
			this._updatingScrollBar = true;
			switch (this._scrollBar.direction)
			{
			case Scrollbar.Direction.LeftToRight:
			case Scrollbar.Direction.RightToLeft:
			{
				this._scrollBar.value = scrollPosition.x;
				float num = this._scrollRect.content.rect.width;
				float num2 = this._scrollRect.viewport.rect.width;
				break;
			}
			case Scrollbar.Direction.BottomToTop:
			case Scrollbar.Direction.TopToBottom:
			{
				this._scrollBar.value = scrollPosition.y;
				float num = this._scrollRect.content.rect.height;
				float num2 = this._scrollRect.viewport.rect.height;
				break;
			}
			default:
				UnityEngine.Debug.LogWarningFormat("Missing direction: '{0}'", new object[]
				{
					this._scrollBar.direction
				});
				break;
			}
			this._scrollBar.size = Mathf.Clamp(this._scrollBar.size, this._minHandleSize, this._maxHandleSize);
			this._updatingScrollBar = false;
			this._tweener.Play();
		}

		public void OnScrollBarValueChanged(float value)
		{
			if (this._updatingScrollBar)
			{
				return;
			}
			switch (this._scrollBar.direction)
			{
			case Scrollbar.Direction.LeftToRight:
			case Scrollbar.Direction.RightToLeft:
				this._scrollRect.horizontalNormalizedPosition = value;
				break;
			case Scrollbar.Direction.BottomToTop:
			case Scrollbar.Direction.TopToBottom:
				this._scrollRect.verticalNormalizedPosition = value;
				break;
			default:
				UnityEngine.Debug.LogWarningFormat("Missing direction: '{0}'", new object[]
				{
					this._scrollBar.direction
				});
				break;
			}
		}

		private void OnTweenerFinishedPlaying(Tweener tweener)
		{
			this._canvasGroup.interactable = false;
		}

		[SerializeField]
		private ScrollRect _scrollRect;

		[SerializeField]
		private Scrollbar _scrollBar;

		[SerializeField]
		private Tweener _tweener;

		[SerializeField]
		[Range(0f, 1f)]
		private float _minHandleSize;

		[SerializeField]
		[Range(0f, 1f)]
		private float _maxHandleSize = 1f;

		[SerializeField]
		private CanvasGroup _canvasGroup;

		[SerializeField]
		private bool _startHidden = true;

		private bool _updatingScrollBar;
	}
}