using UnityEngine;

namespace HPJ.Examples
{
    /// <summary>
    /// An Example Script to ping pong an object between 2 points
    /// </summary>
    public class ObstaclePingPong : MonoBehaviour
    {
        public Transform startPoint;
        public Transform endPoint;
        public float speed = 5.0f;
        [Range(0, 1)]
        public float startingPercent = 0;
        public bool ReverseDirection = false;

        private float pingPongTime = 0.0f;

        private void Start()
        {
            if (ReverseDirection)
            {
                startingPercent = 2 - startingPercent;
            }
            pingPongTime = startingPercent;
        }

        private void OnValidate()
        {
            transform.position = Vector3.Lerp(startPoint.position, endPoint.position, startingPercent);
        }

        void Update()
        {
            pingPongTime += Time.deltaTime * speed;
            float pingPongValue = Mathf.PingPong(pingPongTime, 1.0f);
            transform.position = Vector3.Lerp(startPoint.position, endPoint.position, pingPongValue);
        }
    }
}