
package sc.tool.crash;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Looper;
import android.util.Log;
import android.widget.Toast;

import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;
import java.lang.reflect.Field;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;


/** @Description UncaughtException处理类,当程序发生Uncaught异常的时候,有该类来接管程序,并记录发送错误报告.
 * @author Smallgan */
public class CrashHandler implements UncaughtExceptionHandler
{
	
	public static final String TAG = "CrashHandler";
	String crashPath = "/sdcard/ltsdk/crash/";			// 异常信息保存路径
	
	// 系统默认的UncaughtException处理类
	private UncaughtExceptionHandler mDefaultHandler;
	// CrashHandler实例
	private static CrashHandler INSTANCE = new CrashHandler();
	// 程序的Context对象
	private Context mContext;
	// 用来存储设备信息和异常信息
	private Map<String, String> infos = new HashMap<String, String>();
	
	// 用于格式化日期,作为日志文件名的一部分
	private DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
	
	/** 保证只有一个CrashHandler实例 */
	private CrashHandler()
	{}
	
	/** 获取CrashHandler实例 ,单例模式 */
	public static CrashHandler getInstance()
	{
		return INSTANCE;
	}
	
	/** 初始化
	 * 
	 * @param context */
	public void init(Context context)
	{
		mContext = context;
		// 获取系统默认的UncaughtException处理器
		mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
		// 设置该CrashHandler为程序的默认处理器
		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)
	{
		String exStr = ToString(ex);
		Log.e(TAG, "游戏异常 : " + exStr);
		
		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
		{
			Log.e(TAG, "待处理游戏异常！ ");
			
			// String errorInfo = "android.view.animation.AlphaAnimation cannot be cast to android.view.animation.AnimationSet";
			// if (exStr.contains(errorInfo))
			// {
			// Log.e(TAG, "忽略游戏异常 : " + errorInfo);
			// return;
			// }
			// else
			{
				try
				{
					Thread.sleep(3000);
				}
				catch (InterruptedException e)
				{
					Log.e(TAG, "error : ", e);
				}
				// 退出程序
				android.os.Process.killProcess(android.os.Process.myPid());
				System.exit(1);
			}
		}
	}
	
	/** 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.
	 * 
	 * @param ex
	 * @return true:如果处理了该异常信息;否则返回false. */
	private boolean handleException(Throwable ex)
	{
		if (ex == null) { return false; }
		// 使用Toast来显示异常信息
		new Thread()
		{
			@Override
			public void run()
			{
				Looper.prepare();
				Toast.makeText(mContext, "很抱歉,程序出现异常,即将退出。" + "\r\n" + "异常log信息已保存至:" + crashPath, Toast.LENGTH_LONG).show();
				Looper.loop();
			}
		}.start();
		
		// 收集设备参数信息
		collectDeviceInfo(mContext);
		Log.e(TAG, " handleException() exception info = " + ex);
		
		// 保存日志文件
		saveCrashInfo2File(ex);
		return true;
	}
	
	/** 收集设备参数信息
	 * 
	 * @param ctx */
	public void collectDeviceInfo(Context ctx)
	{
		try
		{
			PackageManager pm = ctx.getPackageManager();
			PackageInfo pi = pm.getPackageInfo(ctx.getPackageName(), PackageManager.GET_ACTIVITIES);
			if (pi != null)
			{
				String versionName = pi.versionName == null ? "null" : pi.versionName;
				String versionCode = pi.versionCode + "";
				infos.put("versionName", versionName);
				infos.put("versionCode", versionCode);
			}
		}
		catch (NameNotFoundException e)
		{
			Log.e(TAG, "an error occured when collect package info", e);
		}
		Field[] fields = Build.class.getDeclaredFields();
		for (Field field : fields)
		{
			try
			{
				field.setAccessible(true);
				infos.put(field.getName(), field.get(null).toString());
				Log.d(TAG, field.getName() + " : " + field.get(null));
			}
			catch (Exception e)
			{
				Log.e(TAG, "an error occured when collect crash info", e);
			}
		}
	}
	
	/** 获取异常文本信息 */
	private String ToString(Throwable ex)
	{
		StringBuffer sb = new StringBuffer();
		for (Map.Entry<String, String> entry : infos.entrySet())
		{
			String key = entry.getKey();
			String value = entry.getValue();
			sb.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();
		
		return result;
	}
	
	/** 保存错误信息到文件中
	 * 
	 * @param ex
	 * @return 返回文件名称,便于将文件传送到服务器 */
	private String saveCrashInfo2File(Throwable ex)
	{
		
		StringBuffer sb = new StringBuffer();
		for (Map.Entry<String, String> entry : infos.entrySet())
		{
			String key = entry.getKey();
			String value = entry.getValue();
			sb.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();
		sb.append(result);
		try
		{
			long timestamp = System.currentTimeMillis();
			String time = formatter.format(new Date());
			String fileName = "crash-" + time + "-" + timestamp + ".txt";
			if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
			{
				// String path = "/sdcard/com.hm.pay.demo/crash/";
				File dir = new File(crashPath);
				if (!dir.exists())
				{
					dir.mkdirs();
				}
				FileOutputStream fos = new FileOutputStream(crashPath + fileName);
				fos.write(sb.toString().getBytes());
				fos.close();
			}
			return fileName;
		}
		catch (Exception e)
		{
			Log.e(TAG, "an error occured while writing file...", e);
		}
		return null;
	}
}
