using System.Collections;
using UnityEngine;
using UnityEngine.UI;

namespace VRKeyboard.Utils
{
	public class GazeRaycaster : MonoBehaviour
	{
		public float delayInSeconds = 0.5f;

		public float loadingTime;

		public Image circle;

		private string lastTargetName = string.Empty;

		private Coroutine gazeControl;

		private void FixedUpdate()
		{
			Vector3 direction = base.transform.TransformDirection(Vector3.forward);
			RaycastHit hitInfo;
			if (Physics.Raycast(base.transform.position, direction, out hitInfo))
			{
				if (hitInfo.transform.tag == "VRGazeInteractable")
				{
					if (!(lastTargetName == hitInfo.transform.name))
					{
						if (lastTargetName == string.Empty)
						{
							lastTargetName = hitInfo.transform.name;
						}
						if (hitInfo.transform.name != lastTargetName)
						{
							circle.fillAmount = 0f;
							lastTargetName = hitInfo.transform.name;
						}
						if (gazeControl != null)
						{
							StopCoroutine(gazeControl);
						}
						gazeControl = StartCoroutine(FillCircle(hitInfo.transform));
					}
				}
				else
				{
					if (gazeControl != null)
					{
						StopCoroutine(gazeControl);
					}
					ResetGazer();
				}
			}
			else
			{
				if (gazeControl != null)
				{
					StopCoroutine(gazeControl);
				}
				ResetGazer();
			}
		}

		private IEnumerator FillCircle(Transform target)
		{
			float timer = 0f;
			circle.fillAmount = 0f;
			yield return new WaitForSeconds(delayInSeconds);
			while (timer < loadingTime)
			{
				timer += Time.deltaTime;
				circle.fillAmount = timer / loadingTime;
				yield return null;
			}
			circle.fillAmount = 1f;
			if ((bool)target.GetComponent<Button>())
			{
				target.GetComponent<Button>().onClick.Invoke();
			}
			ResetGazer();
		}

		private void ResetGazer()
		{
			if (circle == null)
			{
				Debug.LogError("Please assign target loading image, (ie. circle image)");
				return;
			}
			circle.fillAmount = 0f;
			lastTargetName = string.Empty;
		}
	}
}