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

namespace Beyond
{
    public class LoadingScreen : MonoBehaviour
    {
        public GameObject m_bar;
        public int m_levelToLoadID = 1;
        AsyncOperation m_async;
        public bool m_loadOnStart = true;
        // Start is called before the first frame update
        void LoadScene(int lvelID)
        {
            m_async = SceneManager.LoadSceneAsync(lvelID);
            m_async.allowSceneActivation = false;
            m_bar.transform.localScale = new Vector3(m_async.progress, 0.9f, 1);

        }
        IEnumerator LoadSceneCooroutine()
        {
            // The Application loads the Scene in the background as the current Scene runs.
            // This is particularly good for creating loading screens.
            // You could also load the Scene by using sceneBuildIndex. In this case Scene2 has
            // a sceneBuildIndex of 1 as shown in Build Settings.
            //yield return new WaitForSeconds(1f); 
            AsyncOperation asyncLoad = SceneManager.LoadSceneAsync(m_levelToLoadID);
            asyncLoad.allowSceneActivation = false;
            // Wait until the asynchronous scene fully loads
            while (!asyncLoad.isDone)
            {
                m_bar.transform.localScale = new Vector3(asyncLoad.progress, 0.9f, 1);
                if (asyncLoad.progress >= 0.9f)
                {
                    m_bar.transform.localScale = new Vector3(0.9f, 0.9f, 1);
                    asyncLoad.allowSceneActivation = true;
                }
                yield return null;
            }
            m_bar.transform.localScale = new Vector3(1.0f, 0.9f, 1);
            yield return null;
        }

        void Start()
        {
            m_bar.transform.localScale = new Vector3(0.0f, 0.9f, 1f);
            // LoadScene(m_levelToLoadID);
            StartCoroutine(LoadSceneCooroutine());
        }

        // Update is called once per frame
        void Update()
        {
            /*
            if (m_loadOnStart)
            {
                m_loadOnStart = false;
                LoadScene(m_levelToLoadID);
            }
            // Continue until the installation is completed
            if (m_async != null && m_async.isDone == false)
            {
                m_bar.transform.localScale = new Vector3(m_async.progress, 0.9f, 1);
                if (m_async.progress >= 0.9f)
                {
                    m_bar.transform.localScale = new Vector3(1, 0.9f, 1);
                    m_async.allowSceneActivation = true;
                }
            }
            */

        }
    }
}