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

public class WayPointTraverser : MonoBehaviour {

    public Transform[] waypoints;
    public Transform mainCamera;

	public float speed = 3;
    public float startRotationDistance = 2;
    public float rotationSpeed = 5;

    private Quaternion currentDesiredRotation;



    void Start () {
        StartCoroutine(MoveThroughWaypoints());
	}

    private IEnumerator MoveThroughWaypoints()
    {
        int currentWaypoint = 0;
        currentDesiredRotation = waypoints[currentWaypoint].rotation;

        while (true)
        {
            mainCamera.position = Vector3.MoveTowards(mainCamera.position, waypoints[currentWaypoint].position, speed * Time.deltaTime);
            mainCamera.rotation = Quaternion.Lerp(mainCamera.rotation, currentDesiredRotation, rotationSpeed * Time.deltaTime);

            if ((mainCamera.position - waypoints[currentWaypoint].position).magnitude <= startRotationDistance)
            {
                currentDesiredRotation = waypoints[currentWaypoint].rotation;
            }

            if (mainCamera.position == waypoints[currentWaypoint].position)
            {
                currentWaypoint = (currentWaypoint + 1) % waypoints.Length;
            }
            yield return null;
        }
    }
}