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

/// <summary>
/// 
/// </summary>
public class Entrance_LevelLoading : MonoBehaviour
{
    /// <summary>
    /// 异步加载器
    /// </summary>
    private AsyncOperation async = null;

    /// <summary>
    /// 当前 Progress
    /// </summary>
    private float displayProgress = 0;

    /// <summary>
    /// 是否加载中
    /// </summary>
    private bool loading = false;

    /// <summary>
    /// 初始化
    /// </summary>
    private void Start()
    {
        AudioManager.Instance.ChangeGameBackMusic(AudioManager.LoadingBackMusic, 0.1f);

        loading = true;
        displayProgress = 0;
        Invoke("Lateload", 0.15f);
    }
    /// <summary>
    /// 延迟加载
    /// </summary>
    private void Lateload()
    {
        StartCoroutine(IE_LoadLevel());
    }

    /// <summary>
    /// 协同加载
    /// </summary>
    /// <returns>返回加载器</returns>
    private IEnumerator IE_LoadLevel()
    {
        if (LevelManager.Instance().mCurLevel == E_Level.Battle)
        {
            ////if (LevelManager.Instance().mCurLevelResName == "YLBattle_1_ADON")
            ////{
            ////    async = SceneManager.LoadSceneAsync("YLBattle_1_AL");
            ////    async.allowSceneActivation = false;
            ////}
            ////else
            {
                // 开始加载资源
                ResourceHelper.Instance.LoadAssetBundle(LevelManager.Instance().mCurLevelResName, (obj) =>
                {
                // 资源有效
                if (obj != null)
                    {
                        async = SceneManager.LoadSceneAsync(LevelManager.Instance().mCurLevelResName);
                        async.allowSceneActivation = false;
                    }
                // 资源无效
                else
                    {
                        async = SceneManager.LoadSceneAsync(LevelManager.Instance().mCurLevelResName);
                        async.allowSceneActivation = false;
                    }
                });
            }
        }
        else
        {
            async = SceneManager.LoadSceneAsync((int)LevelManager.Instance().mCurLevel);
            async.allowSceneActivation = false;
        }

        // 显示加载进度
        while (loading)
        {
            if (async != null)
            {
                if (async.progress < 0.9f)
                {
                    displayProgress = async.progress + 0.1f;
                    UI_LoadingWindow.Instance().SetProgress((int)(displayProgress * 100));
                }
                else
                {
                    loading = false;
                    displayProgress = 1.0f;
                    UI_LoadingWindow.Instance().SetProgress(100);

                    yield return new WaitForSeconds(0.2f);

                    async.allowSceneActivation = true;
                }
            }
            else
            {
                displayProgress = ResourceHelper.Instance.GetLoadProgress();
                UI_LoadingWindow.Instance().SetProgress((int)(displayProgress * 100));
            }

            yield return new WaitForSeconds(0.02f);
        }
    }
}