package com.anyun.exam.lib.crash;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Looper;
import android.widget.Toast;


import com.anyun.basecommonlib.MyLog;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.reflect.Field;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Map;



/**
 * MyApplication2
 * Created by lzw on 2019/9/27. 10:22:20
 * 邮箱：632393724@qq.com
 * All Rights Saved! Chongqing AnYun Tech co. LTD
 */
public class CrashHandler implements Thread.UncaughtExceptionHandler {

    private static CrashHandler mInstance = new CrashHandler();
    private Thread.UncaughtExceptionHandler mDefaultCrashHandler;
    private Context mContext;
    private SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    private HashMap<String, String> infos = new HashMap<>();

    /**
     * 私有构造函数
     **/
    private CrashHandler() {

    }

    public static CrashHandler getInstance() {
        return mInstance;
    }

    public void init(Context context) {
        this.mContext = context;
        mDefaultCrashHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    @Override
    public void uncaughtException(Thread t, Throwable e) {
        if (!handleException(e) && mDefaultCrashHandler != null) {
            //如果用户没有处理异常则让系统默认的异常处理器去处理异常
            mDefaultCrashHandler.uncaughtException(t, e);
        } else {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException ex) {
                ex.printStackTrace();
            }

            //退出程序
            android.os.Process.killProcess(android.os.Process.myPid());
            System.exit(1);

        }
    }

    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return false;
        }
        //使用Toast显示异常信息
        new Thread(){
            @Override
            public void run() {
                Looper.prepare();
                Toast.makeText(mContext,"很抱歉，程序出现异常，即将退出！",Toast.LENGTH_SHORT).show();
                Looper.loop();
            }
        }.start();
        //收集设备信息
        collectDeviceInfo();
        saveCrashInfo2File(ex);
        return true;
    }

    private void saveCrashInfo2File(Throwable ex) {
        StringBuffer stringBuffer = new StringBuffer();
        for (Map.Entry<String, String> entry : infos.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue();
            stringBuffer.append(key + "=" + value + "\n");

        }
        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);
        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }
        printWriter.close();
        String result = writer.toString();
        stringBuffer.append(result);

        MyLog.i("crash", stringBuffer.toString());
    }

    private void collectDeviceInfo() {
        if (mContext != null) {
            PackageManager packageManager = mContext.getPackageManager();
            try {
                PackageInfo packageInfo = packageManager.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
                if (packageInfo != null) {
                    String versionCode = Long.toString(packageInfo.versionCode);
                    String versionName = packageInfo.versionName;
                    infos.put("versionName", versionName);
                    infos.put("versionCode", versionCode);
                }
            } catch (PackageManager.NameNotFoundException e) {
                e.printStackTrace();
            }
            Field[] fields = Build.class.getDeclaredFields();
            for (Field field :
                    fields) {
                field.setAccessible(true);
                try {
                    infos.put(field.getName(), field.get(null).toString());
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}