using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEditor;

using System.IO;

/// <summary>

/// 设置好路径,点击 自动打ab包  即可 脚本必须放在Editor文件下面

/// </summary>

public class AssetBundleBuilder: MonoBehaviour

{

    //资源存放路径

    static string assetsDir =  "Assets/Prefabs/EQ设备/4k";

    //打包后存放路径

    const string assetBundlesPath = "Assets/StreamingAssets/预制体";

    BuildAssetBundleOptions sdsd = new BuildAssetBundleOptions();

    [MenuItem("AssetBundle/自动打ab包")]

    static void AutoBuildAll()

    {

        //清除所有的AssetBundleName

        ClearAssetBundlesName();

        //设置指定路径下所有需要打包的assetbundlename

        SetAssetBundlesName(assetsDir);

        //打包所有需要打包的asset   //看你是什么平台 打包对应平台要不然加载不出来

        BuildPipeline.BuildAssetBundles(assetBundlesPath, BuildAssetBundleOptions.None, BuildTarget.WebGL);

    }

    /// <summary>

    /// 清除所有的AssetBundleName，由于打包方法会将所有设置过AssetBundleName的资源打包，所以自动打包前需要清理

    /// </summary>

    static void ClearAssetBundlesName()

    {

        //获取所有的AssetBundle名称

        string[] abNames = AssetDatabase.GetAllAssetBundleNames();

        //强制删除所有AssetBundle名称

        for (int i = 0; i < abNames.Length; i++)

        {

            AssetDatabase.RemoveAssetBundleName(abNames[i], true);

        }

    }

    /// <summary>

    /// 设置所有在指定路径下的AssetBundleName

    /// </summary>

    static void SetAssetBundlesName(string _assetsPath)

    {

        //先获取指定路径下的所有Asset，包括子文件夹下的资源

        DirectoryInfo dir = new DirectoryInfo(_assetsPath);

        FileSystemInfo[] files = dir.GetFileSystemInfos(); //GetFileSystemInfos方法可以获取到指定目录下的所有文件以及子文件夹

        Debug.Log(files.Length);

        for (int i = 0; i < files.Length; i++)

        {

            if (files[i] is DirectoryInfo)  //如果是文件夹则递归处理

            {

                SetAssetBundlesName(files[i].FullName);

            }

            else if (!files[i].Name.EndsWith(".meta")) //如果是文件的话，则设置AssetBundleName，并排除掉.meta文件

            {

                SetABName(files[i].FullName);     //逐个设置AssetBundleName

            }

        }

    }

    /// <summary>

    /// 设置单个AssetBundle的Name

    /// </summary>

    /// <param name="filePath"></param>

    static void SetABName(string assetPath)

    {

        string importerPath = "Assets" + assetPath.Substring(Application.dataPath.Length);  //这个路径必须是以Assets开始的路径

        AssetImporter assetImporter = AssetImporter.GetAtPath(importerPath);  //得到Asset

        string tempName = assetPath.Substring(assetPath.LastIndexOf(@"\") + 1);

        string assetName = tempName.Remove(tempName.LastIndexOf(".")); //获取asset的文件名称

        assetImporter.assetBundleName = assetName;    //最终设置assetBundleName

        assetImporter.assetBundleVariant = "ab";      //设置ab包后缀

    }

}