using System;
using UnityEngine;

namespace ECM2.Walkthrough.Ex71
{
	[RequireComponent(typeof(Rigidbody))]
	public class KinematicMove : MonoBehaviour
	{
		[SerializeField]
		public float _moveTime = 3f;

		[SerializeField]
		private Vector3 _offset;

		private Rigidbody _rigidbody;

		private Vector3 _startPosition;

		private Vector3 _targetPosition;

		public float moveTime
		{
			get
			{
				return _moveTime;
			}
			set
			{
				_moveTime = Mathf.Max(0.0001f, value);
			}
		}

		public Vector3 offset
		{
			get
			{
				return _offset;
			}
			set
			{
				_offset = value;
			}
		}

		public static float EaseInOut(float time, float duration)
		{
			return -0.5f * (Mathf.Cos(MathF.PI * time / duration) - 1f);
		}

		public void OnValidate()
		{
			moveTime = _moveTime;
		}

		public void Awake()
		{
			_rigidbody = GetComponent<Rigidbody>();
			_rigidbody.isKinematic = true;
			_startPosition = base.transform.position;
			_targetPosition = _startPosition + offset;
		}

		public void FixedUpdate()
		{
			float t = EaseInOut(Mathf.PingPong(Time.time, _moveTime), _moveTime);
			Vector3 position = Vector3.Lerp(_startPosition, _targetPosition, t);
			_rigidbody.MovePosition(position);
		}
	}
}