using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.XR.ARFoundation;

namespace UnityEngine.XR.ARFoundation.Samples
{
    /// <summary>
    /// Reloads the ARSession by first destroying the ARSession's GameObject
    /// and then instantiating a new ARSession from a Prefab.
    /// </summary>
    public class SessionReloader : MonoBehaviour
    {
        public ARSession session;
        public GameObject sessionPrefab;
        public Button pauseButton;
        public Button resumeButton;
        public Button resetButton;

        public void ReloadSession()
        {
            if (session != null)
            {
                StartCoroutine(DoReload());
            }
        }

        IEnumerator DoReload()
        {
            Destroy(session.gameObject);
            yield return null;

            if (sessionPrefab != null)
            {
                session = Instantiate(sessionPrefab).GetComponent<ARSession>();

                // Hook the buttons back up
                resetButton.onClick.AddListener(session.Reset);
                pauseButton.onClick.AddListener(() => { session.enabled = false; });
                resumeButton.onClick.AddListener(() => { session.enabled = true; });
            }

        }
    }
}