package com.basic.security.utils;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;

public class MacAddressUtils {

    //    根据IP地址获取MAC地址
    public static String getMacAddress() {
        String strMacAddress = null;
        try {
            // 获得IpD地址
            InetAddress ip = getLocalIntentAddress();
            byte[] b = NetworkInterface.getByInetAddress(ip).getHardwareAddress();
            StringBuilder buffer = new StringBuilder();
            for (int i = 0; i < b.length; i++) {
                if (i != 0) {
                    buffer.append(':');
                }
                String str = Integer.toHexString(b[i] & 0xFF);
                buffer.append(str.length() == 1 ? 0 + str : str);
            }
            strMacAddress = buffer.toString().toUpperCase();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return strMacAddress;
    }

    //    获取移动设备本地IP
    private static InetAddress getLocalIntentAddress() {
        InetAddress ip = null;
        try {
            // 列举
            Enumeration<NetworkInterface> en_netInterface = NetworkInterface.getNetworkInterfaces();
            while (en_netInterface.hasMoreElements()) {// 是否还有元素
                NetworkInterface ni = en_netInterface.nextElement();// 得到下一个元素
                Enumeration<InetAddress> en_ip = ni.getInetAddresses();// 得到一个ip地址的列举
                while (en_ip.hasMoreElements()) {
                    ip = en_ip.nextElement();
                    if (!ip.isLoopbackAddress() && !ip.getHostAddress().contains(":"))
                        break;
                    else
                        ip = null;
                }

                if (ip != null) {
                    break;
                }
            }
        } catch (SocketException e) {
            e.printStackTrace();
        }
        return ip;
    }


    private static String getLocalIpAddress() {
        try {
            for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements(); ) {

                NetworkInterface intf = en.nextElement();

                for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements(); ) {

                    InetAddress inetAddress = enumIpAddr.nextElement();

                    if (!inetAddress.isLoopbackAddress()) {
                        return inetAddress.getHostAddress();
                    }

                }
            }
        } catch (SocketException ex) {
            ex.printStackTrace();
        }
        return null;
    }


    //    android 7.0及以上 （2）扫描各个网络接口获取mac地址
    public static String getMachineHardwareAddress() {
        Enumeration<NetworkInterface> interfaces = null;
        try {
            interfaces = NetworkInterface.getNetworkInterfaces();
        } catch (SocketException e) {
            e.printStackTrace();
        }
        String hardWareAddress = null;
        NetworkInterface iF = null;
        if (interfaces == null) {
            return null;
        }
        while (interfaces.hasMoreElements()) {
            iF = interfaces.nextElement();
            try {
                hardWareAddress = bytesToString(iF.getHardwareAddress());
                if (hardWareAddress != null)
                    break;
            } catch (SocketException e) {
                e.printStackTrace();
            }
        }
        return hardWareAddress;
    }

    //    byte转为String
    private static String bytesToString(byte[] bytes) {
        if (bytes == null || bytes.length == 0) {
            return null;
        }
        StringBuilder buf = new StringBuilder();
        for (byte b : bytes) {
            buf.append(String.format("%02X:", b));
        }
        if (buf.length() > 0) {
            buf.deleteCharAt(buf.length() - 1);
        }
        return buf.toString();
    }


    //    根据busy_box获取本地Mac
    public static String getLocalMacAddressFromBusyBox() {
        String result = "";
        String Mac = "";
        result = callCmd("busybox ifconfig", "HWaddr");
        // 如果返回的result == null，则说明网络不可取
        if (result == null) {
            return "网络异常";
        }
        // 对该行数据进行解析
        // 例如：eth0 Link encap:Ethernet HWaddr 00:16:E8:3E:DF:67
        if (result.length() > 0 && result.contains("HWaddr") == true) {
            Mac = result.substring(result.indexOf("HWaddr") + 6, result.length() - 1);
            result = Mac;
        }
        return result.trim();
    }

    private static String callCmd(String cmd, String filter) {
        String result = "";
        String line = "";
        try {
            Process proc = Runtime.getRuntime().exec(cmd);
            InputStreamReader is = new InputStreamReader(proc.getInputStream());
            BufferedReader br = new BufferedReader(is);

            while ((line = br.readLine()) != null && !line.contains(filter)) {
                result += line;
            }

            result = line;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }


}