import android.content.Context;
import android.os.Looper;
import android.text.TextUtils;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.cache.ExternalCacheDiskCacheFactory;
import com.bumptech.glide.load.engine.cache.InternalCacheDiskCacheFactory;

import java.io.File;
import java.math.BigDecimal;

/**Glide緩存工具類
* Created by Trojx on 2016/10/10 0010.
*/

public class GlideCacheUtil {
private static GlideCacheUtil inst;

public static GlideCacheUtil getInstance() {
if (inst == null) {
inst = new GlideCacheUtil();
}
return inst;
}

/**
* 清除圖片磁盤緩存
*/
public void clearImageDiskCache(Context context) {
try {
if (Looper.myLooper() == Looper.getMainLooper()) {
new Thread(new Runnable() {
@Override
public void run() {
Glide.get(context).clearDiskCache();
// BusUtil.getBus().post(new GlideCacheClearSuccessEvent());
}
}).start();
} else {
Glide.get(context).clearDiskCache();
}
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 清除圖片內存緩存
*/
public void clearImageMemoryCache(Context context) {
try {
if (Looper.myLooper() == Looper.getMainLooper()) { //只能在主線程執行
Glide.get(context).clearMemory();
}
} catch (Exception e) {
e.printStackTrace();
}
}

/**
* 清除圖片所有緩存
*/
public void clearImageAllCache(Context context) {
clearImageDiskCache(context);
clearImageMemoryCache(context);
String ImageExternalCatchDir=context.getExternalCacheDir()+ExternalCacheDiskCacheFactory.DEFAULT_DISK_CACHE_DIR;
deleteFolderFile(ImageExternalCatchDir, true);
}

/**
* 獲取Glide造成的緩存大小
*
* @return CacheSize
*/
public String getCacheSize(Context context) {
try {
return getFormatSize(getFolderSize(new File(context.getCacheDir() + "/"+InternalCacheDiskCacheFactory.DEFAULT_DISK_CACHE_DIR)));
} catch (Exception e) {
e.printStackTrace();
}
return "";
}

/**
* 獲取指定文件夾內所有文件大小的和
*
* @param file file
* @return size
* @throws Exception
*/
private long getFolderSize(File file) throws Exception {
long size = 0;
try {
File[] fileList = file.listFiles();
for (File aFileList : fileList) {
if (aFileList.isDirectory()) {
size = size + getFolderSize(aFileList);
} else {
size = size + aFileList.length();
}
}
} catch (Exception e) {
e.printStackTrace();
}
return size;
}

/**
* 刪除指定目錄下的文件，這里用于緩存的刪除
*
* @param filePath filePath
* @param deleteThisPath deleteThisPath
*/
private void deleteFolderFile(String filePath, boolean deleteThisPath) {
if (!TextUtils.isEmpty(filePath)) {
try {
File file = new File(filePath);
if (file.isDirectory()) {
File files[] = file.listFiles();
for (File file1 : files) {
deleteFolderFile(file1.getAbsolutePath(), true);
}
}
if (deleteThisPath) {
if (!file.isDirectory()) {
file.delete();
} else {
if (file.listFiles().length == 0) {
file.delete();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

/**
* 格式化單位
*
* @param size size
* @return size
*/
private static String getFormatSize(double size) {

double kiloByte = size / 1024;
if (kiloByte < 1) {
return size + "Byte";
}

double megaByte = kiloByte / 1024;
if (megaByte < 1) {
BigDecimal result1 = new BigDecimal(Double.toString(kiloByte));
return result1.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "KB";
}

double gigaByte = megaByte / 1024;
if (gigaByte < 1) {
BigDecimal result2 = new BigDecimal(Double.toString(megaByte));
return result2.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "MB";
}

double teraBytes = gigaByte / 1024;
if (teraBytes < 1) {
BigDecimal result3 = new BigDecimal(Double.toString(gigaByte));
return result3.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "GB";
}
BigDecimal result4 = new BigDecimal(teraBytes);

return result4.setScale(2, BigDecimal.ROUND_HALF_UP).toPlainString() + "TB";
}
}