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


namespace EduCoderTool
{
    /*
     * @func AB资源加载
     * @author lz
     */
    public class DownloadRes : MonoBehaviour
    {

        [Header("加载进度")]
        public Text txt_percent;

        [Header("场景主包地址")]
        public string mainABUrl;

        // Start is called before the first frame update
        void Start()
        {
            //string filepath = "file://D:/UnityProjects/ZQCourse/ZQCourse/AssetBundles/WebGL/main";
            //string filepath = "http://localhost/Missile/AssetBundles/WebGL/main";
            StartCoroutine(LoadScene(mainABUrl));

        }

        /// <summary>
        /// 服务端加载ab场景包
        /// </summary>
        /// <param name="fileUrl"></param>
        /// <returns></returns>
        private IEnumerator LoadScene(string fileUrl)
        {
            using (UnityWebRequest uwr = UnityWebRequestAssetBundle.GetAssetBundle(fileUrl))
            {
                uwr.SendWebRequest();
                if (uwr.isNetworkError || uwr.isHttpError)
                    Debug.Log(uwr.error);

                while (!uwr.isDone)
                {
                    float percent = Mathf.Floor(uwr.downloadProgress * 100);
                    Debug.Log(percent);
                    txt_percent.text = "正在加载："+percent + "%";
                    yield return 1;
                }

                if (uwr.isDone)
                {
                    txt_percent.text = "加载完成，准备进入课程";
                }

                AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(uwr);
                string[] scenePath = bundle.GetAllScenePaths();
               
                SceneManager.LoadScene(scenePath[0]);
            }
        }

        /// <summary>
        /// 本地加载ab包
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns></returns>
        private IEnumerator LoadLocalScene(string filePath)
        {
            AssetBundleCreateRequest request = AssetBundle.LoadFromFileAsync(filePath);
            yield return request;

            AssetBundle ab = request.assetBundle;

            string[] scenePath = ab.GetAllScenePaths();
            SceneManager.LoadScene(scenePath[0]);
        }

    }

}