using System;
using System.Collections.Generic;
using System.Diagnostics;
using UnityEngine;

namespace Tweening
{
	public sealed class Tweener : MonoBehaviour
	{
		//[DebuggerBrowsable(DebuggerBrowsableState.Never)]
		public event Tweener.FinishedPlayingEventHandler FinishedPlaying;

		private void Awake()
		{
			this.IsPlaying = false;
			this.IsPaused = false;
			this._tracks.Sort((TweenerTrackBase a, TweenerTrackBase b) => a.Delay.CompareTo(b.Delay));
			this.AnimationTime = this.CalcHighestEndTime();
		}

		private void Start()
		{
			if (this._playOnStart)
			{
				this.Play();
			}
		}

		private void Update()
		{
			if (!this.IsPlaying || this.IsPaused)
			{
				return;
			}
			if (this._time >= this.AnimationTime && this._loop)
			{
				this._time = 0f;
				this.UpdateTrackComponentValues();
			}
			this._time += Time.deltaTime;
			this.UpdateTrackComponentValues();
			if (this._time >= this.AnimationTime && !this._loop)
			{
				this.UpdateTrackComponentValues((!this.IsPlaybackReversed) ? this.AnimationTime : 0f);
				this.IsPlaying = false;
				if (this.FinishedPlaying != null)
				{
					this.FinishedPlaying(this);
				}
			}
		}

		public void Play()
		{
			this.Play(false, 0f);
		}

		public void PlayReverse()
		{
			this.Play(true, 0f);
		}

		public void PlayWithOffset(float offset)
		{
			if (this._loop)
			{
				offset %= this.AnimationTime;
			}
			else
			{
				offset = Mathf.Clamp(offset, 0f, this.AnimationTime);
			}
			this.Play(false, offset);
		}

		public void TogglePause()
		{
			this.IsPaused = !this.IsPaused;
		}

		public void Stop()
		{
			if (!this.IsPlaying)
			{
				UnityEngine.Debug.LogWarning("Tweener isn't playing.");
				return;
			}
			this.IsPlaying = false;
		}

		public void Reset(bool resetToEnd = false)
		{
			if (this.IsPlaying)
			{
				UnityEngine.Debug.LogWarning("Can't reset while playing.");
				return;
			}
			for (int i = this._tracks.Count - 1; i >= 0; i--)
			{
				this._tracks[i].ResetTrack();
			}
			if (resetToEnd)
			{
				this.UpdateTrackComponentValues(this.CalcHighestEndTime());
			}
		}

		public void StopAndReset(bool resetToEnd = false)
		{
			if (this.IsPlaying)
			{
				this.Stop();
			}
			this.Reset(resetToEnd);
		}

		public bool IsPlaying { get; private set; }

		public bool IsPaused { get; private set; }

		public bool IsPlaybackReversed { get; private set; }

		public float AnimationTime { get; private set; }

		private void Play(bool playReversed, float offset)
		{
			if (this.IsPlaying)
			{
				UnityEngine.Debug.LogWarning("Tweener is already playing.");
				return;
			}
			this.IsPlaybackReversed = playReversed;
			this.IsPlaying = true;
			this.IsPaused = false;
			this._time = offset;
			this.AnimationTime = this.CalcHighestEndTime();
			for (int i = this._tracks.Count - 1; i >= 0; i--)
			{
				this._tracks[i].ResetTrack();
			}
			this.UpdateTrackComponentValues();
		}

		private void UpdateTrackComponentValues()
		{
			this.UpdateTrackComponentValues((!this.IsPlaybackReversed) ? this._time : (this.AnimationTime - this._time));
		}

		private void UpdateTrackComponentValues(float trackTime)
		{
			int count = this._tracks.Count;
			for (int i = 0; i < count; i++)
			{
				Tweener.UpdateComponentValue(this._tracks[i], trackTime);
			}
		}

		private static void UpdateComponentValue(TweenerTrackBase track, float time)
		{
			if (time >= track.Delay)
			{
				track.InitializeTrack();
				WrapMode postWrapMode = track.Curve.postWrapMode;
				float time2;
				if (postWrapMode != WrapMode.Loop)
				{
					if (postWrapMode != WrapMode.PingPong)
					{
						time2 = Mathf.Clamp01((time - track.Delay) / track.Duration);
					}
					else
					{
						time2 = Mathf.PingPong((time - track.Delay) / track.Duration, 1f);
					}
				}
				else
				{
					time2 = (time - track.Delay) / track.Duration;
				}
				track.UpdateComponentValue(track.Curve.Evaluate(time2));
			}
		}

		private float CalcHighestEndTime()
		{
			float num = 0f;
			int count = this._tracks.Count;
			for (int i = 0; i < count; i++)
			{
				num = Mathf.Max(num, this._tracks[i].EndTime);
			}
			return num;
		}

		[SerializeField]
		private bool _playOnStart;

		[SerializeField]
		private bool _loop;

		[SerializeField]
		private List<TweenerTrackBase> _tracks;

		private float _time;

		public delegate void FinishedPlayingEventHandler(Tweener tweener);
	}
}