using UnityEngine;

public class FlyBird : MonoBehaviour
{
	public float normalSpeed = 1f;

	public float minHeightFly = 5f;

	public float maxHeightFly = 15f;

	public float range = 20f;

	private Vector3 startPosition;

	private Vector3 dstPoint;

	private float currSpeed = 1f;

	private void Start()
	{
		startPosition = base.transform.position;
		RandomDstPoint();
		currSpeed = normalSpeed;
	}

	private void Update()
	{
		base.transform.Translate(Vector3.forward * Time.deltaTime * currSpeed);
		Vector3 vector = base.transform.position - dstPoint;
		if (!(vector == Vector3.zero))
		{
			Quaternion b = Quaternion.LookRotation(vector * Time.deltaTime);
			base.transform.rotation = Quaternion.Slerp(base.transform.rotation, b, Time.deltaTime * (1f + currSpeed));
			if (Vector3.Distance(base.transform.position, dstPoint) < 1f)
			{
				RandomDstPoint();
			}
		}
	}

	private void RandomDstPoint()
	{
		dstPoint = startPosition + Random.insideUnitSphere * range;
		dstPoint.y = startPosition.y + Random.Range(minHeightFly, maxHeightFly);
		currSpeed = normalSpeed + Random.Range(0f, 3f);
	}

	private void OnDrawGizmosSelected()
	{
		Gizmos.DrawWireSphere(base.transform.position, range);
	}
}