/*
 * MIT License
 *
 * Copyright (c) 2019 Perol_Notsfsssf
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE
 */

package com.perol.asdpl.pixivez.objects;

import android.content.Context;
import android.content.res.Resources;
import android.os.Looper;
import android.text.format.Time;
import android.util.Log;
import android.view.Gravity;
import android.view.InflateException;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.io.FilenameFilter;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.util.Arrays;
import java.util.Properties;
import java.util.TreeSet;

public class CrashHandler implements Thread.UncaughtExceptionHandler {

    /**
     * Debug Log tag
     */
    public static final String TAG = "CrashHandler";
    /**
     * 是否开启日志输出,在Debug状态下开启,
     * 在Release状态下关闭以提示程序性能
     */
    public static final boolean DEBUG = true;
    /**
     * 系统默认的UncaughtException处理类
     */
    private Thread.UncaughtExceptionHandler mDefaultHandler;
    /**
     * CrashHandler实例
     */
    private static CrashHandler INSTANCE;
    /**
     * 程序的Context对象
     */
    private Context mContext;
    private Properties mDeviceCrashInfo = new Properties();
    private static final String VERSION_NAME = "versionName";
    private static final String VERSION_CODE = "versionCode";
    private static final String STACK_TRACE = "STACK_TRACE";
    /**
     * 错误报告文件的扩展名
     */
    private static final String CRASH_REPORTER_EXTENSION = ".cr";

    private static Object syncRoot = new Object();

    /**
     * 保证只有一个CrashHandler实例
     */
    private CrashHandler() {
    }

    /**
     * 获取CrashHandler实例 ,单例模式
     */
    public static CrashHandler getInstance() {
       /* if (INSTANCE == null) {
            INSTANCE = new CrashHandler();
        }
        return INSTANCE;*/
        // 防止多线程访问安全,这里使用了双重锁
        if (INSTANCE == null) {

            synchronized (syncRoot) {

                if (INSTANCE == null) {
                    INSTANCE = new CrashHandler();
                }
            }
        }
        return INSTANCE;
    }

    /**
     * 初始化,注册Context对象,
     * 获取系统默认的UncaughtException处理器,
     * 设置该CrashHandler为程序的默认处理器
     *
     * @param ctx
     */
    public void init(Context ctx) {
        mContext = ctx;
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    /**
     * 当UncaughtException发生时会转入该函数来处理
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(ex) && mDefaultHandler != null) {
            //如果用户没有处理则让系统默认的异常处理器来处理
            mDefaultHandler.uncaughtException(thread, ex);
        } else {
            //Sleep一会后结束程序
            try {
                Thread.sleep(5000);
            } catch (InterruptedException e) {
                Log.e(TAG, "Error : ", e);
            }
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(10);
        }
    }

    /**
     * 自定义错误处理,收集错误信息
     * 发送错误报告等操作均在此完成.
     * 开发者可以根据自己的情况来自定义异常处理逻辑
     *
     * @param ex
     * @return true:如果处理了该异常信息;否则返回false
     */
    private boolean handleException(final Throwable ex) {
        if (ex == null) {
            Log.w(TAG, "handleException --- ex==null");
            return true;
        }
        final String msg = ex.getLocalizedMessage();

        if (msg == null) {
            return false;
        }
        //使用Toast来显示异常信息
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                if (ex instanceof Resources.NotFoundException || ex instanceof InflateException || (ex.getMessage() != null && ex.getMessage().contains("XML"))) {
                    Toast toast = Toast.makeText(mContext, "你使用的是二次打包(如QQ传应用,APKPURE,应用备份等等)的应用,请清除数据,前往google play或者设置中的github项目地址进行安装:\r\n" + ex.getMessage(),
                            Toast.LENGTH_LONG);
                    toast.setGravity(Gravity.CENTER, 0, 0);
                    toast.show();
                } else if (DEBUG) {
                    Toast toast = Toast.makeText(mContext, "程序出错,即将退出:\r\n" + ex.getMessage(),
                            Toast.LENGTH_LONG);
                    toast.setGravity(Gravity.CENTER, 0, 0);
                    toast.show();

                }
                Looper.loop();
            }
        }.start();
        //收集设备信息
        collectCrashDeviceInfo(mContext);
        //保存错误报告文件
        saveCrashInfoToFile(ex);
        //发送错误报告到服务器
        //sendCrashReportsToServer(mContext);
        return true;
    }

    /**
     * 在程序启动时候, 可以调用该函数来发送以前没有发送的报告
     */
    public void sendPreviousReportsToServer() {
        sendCrashReportsToServer(mContext);
    }

    /**
     * 把错误报告发送给服务器,包含新产生的和以前没发送的.
     *
     * @param ctx
     */
    private void sendCrashReportsToServer(Context ctx) {
        String[] crFiles = getCrashReportFiles(ctx);
        if (crFiles != null && crFiles.length > 0) {
            TreeSet<String> sortedFiles = new TreeSet<String>();
            sortedFiles.addAll(Arrays.asList(crFiles));
            for (String fileName : sortedFiles) {
                File cr = new File(ctx.getFilesDir(), fileName);
                postReport(cr);
                cr.delete();// 删除已发送的报告
            }
        }
    }

    private void postReport(File file) {

    }

    /**
     * 获取错误报告文件名
     *
     * @param ctx
     * @return
     */
    private String[] getCrashReportFiles(Context ctx) {
        File filesDir = ctx.getFilesDir();
        FilenameFilter filter = new FilenameFilter() {
            public boolean accept(File dir, String name) {
                return name.endsWith(CRASH_REPORTER_EXTENSION);
            }
        };
        return filesDir.list(filter);
    }

    /**
     * 保存错误信息到文件中
     *
     * @param ex
     * @return
     */
    private String saveCrashInfoToFile(Throwable ex) {
        Writer info = new StringWriter();
        PrintWriter printWriter = new PrintWriter(info);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        String result = info.toString();
        printWriter.close();
        mDeviceCrashInfo.put("EXEPTION", ex.getLocalizedMessage());
        mDeviceCrashInfo.put(STACK_TRACE, result);
        try {
            //long timestamp = System.currentTimeMillis();
            Time t = new Time("GMT+8");
            t.setToNow(); // 取得系统时间
            int date = t.year * 10000 + t.month * 100 + t.monthDay;
            int time = t.hour * 10000 + t.minute * 100 + t.second;
            String fileName = "crash-" + date + "-" + time + CRASH_REPORTER_EXTENSION;
            FileOutputStream trace = mContext.openFileOutput(fileName,
                    Context.MODE_PRIVATE);
            mDeviceCrashInfo.store(trace, "");
            trace.flush();
            trace.close();
            return fileName;
        } catch (Exception e) {
            Log.e(TAG, "an error occured while writing report file...", e);
        }
        return null;
    }

    /**
     * 收集程序崩溃的设备信息
     *
     * @param ctx
     */
    public void collectCrashDeviceInfo(Context ctx) {
//        try {
//            PackageManager pm = ctx.getPackageManager();
//            PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(),
//                    PackageManager.GET_ACTIVITIES);
//            if (pi != null) {
//                mDeviceCrashInfo.put(VERSION_NAME,
//                        pi.versionName == null ? "not set" : pi.versionName);
//                mDeviceCrashInfo.put(VERSION_CODE, ""+pi.versionCode);
//            }
//        } catch (PackageManager.NameNotFoundException e) {
//            Log.e(TAG, "Error while collect package info", e);
//        }
        //使用反射来收集设备信息.在Build类中包含各种设备信息,
        //例如: 系统版本号,设备生产商 等帮助调试程序的有用信息

    }


}