package com.mogo.utils;

import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.content.Context;
import android.os.Process;
import android.text.TextUtils;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.List;

public class ProcessUtils {

    public static boolean isMainProcess( Context context ) {
        try {
            ActivityManager activityManager = ( ( ActivityManager ) context.getSystemService( Context.ACTIVITY_SERVICE ) );
            if ( activityManager == null ) {
                return false;
            }
            List< RunningAppProcessInfo > raps = activityManager.getRunningAppProcesses();
            if ( raps == null || raps.size() <= 0 ) {
                return false;
            }
            int pid = Process.myPid();
            String packageName = context.getPackageName();
            for ( RunningAppProcessInfo info : raps ) {
                if ( packageName.equals( info.processName ) ) {
                    return pid == info.pid;
                }
            }
            return false;
        } catch ( Exception e ) {
            e.printStackTrace();
        }

        return false;
    }

    public static String getPackageName() {
        String packageName = null;
        BufferedReader reader = null;

        try {
            reader = new BufferedReader( new InputStreamReader( new FileInputStream( "/proc/" + Process.myPid() + "/cmdline" ) ) );
            packageName = reader.readLine().trim();
        } catch ( Exception e ) {
            e.printStackTrace();
            packageName = String.valueOf( Process.myPid() );
        } finally {
            if ( reader != null ) try {
                reader.close();
            } catch ( IOException e ) {
                e.printStackTrace();
            }
        }

        return packageName;
    }

    /**
     * 获取进程号对应的进程名
     *
     * @param pid 进程号
     * @return 进程名
     */
    public static String getProcessName( int pid ) {
        BufferedReader reader = null;
        try {
            reader = new BufferedReader( new FileReader( "/proc/" + pid + "/cmdline" ) );
            String processName = reader.readLine();
            if ( !TextUtils.isEmpty( processName ) ) {
                processName = processName.trim();
            }
            return processName;
        } catch ( Throwable t ) {
            t.printStackTrace();
        } finally {
            IOUtils.closeSilently( reader );
        }
        return null;
    }
}