package com.hc.lib;

import android.Manifest;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.pm.PackageManager;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import android.os.Build;
import android.text.TextUtils;
import android.util.Log;

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

public final class MacUtil {

    public static String getMac(Context context) {
        String strMac;

        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
            Log.d("=====", "6.0以下");
            strMac = getLocalMacAddressFromWifiInfo(context);
        } else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) {
            Log.d("=====", "6.0以上7.0以下");
            strMac = getMacAddress(context);
        } else {
            Log.d("=====", "7.0以上");
            if (!TextUtils.isEmpty(getMacAddress())) {
                Log.d("=====", "7.0以上1");
                strMac = getMacAddress();
            } else if (!TextUtils.isEmpty(getMachineHardwareAddress())) {
                Log.d("=====", "7.0以上2");
                strMac = getMachineHardwareAddress();
            } else {
                Log.d("=====", "7.0以上3");
                strMac = getLocalMacAddressFromBusybox();
            }
        }

        if (TextUtils.isEmpty(strMac)) {
            strMac = "02:00:00:00:00:00";
        }

        return strMac;
    }


    /**
     * 根据wifi信息获取本地mac
     */
    @SuppressLint("HardwareIds")
    public static String getLocalMacAddressFromWifiInfo(Context context) {
        WifiManager wifi = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
        WifiInfo info = null;
        if (wifi != null) {
            info = wifi.getConnectionInfo();
        }
        String mac = null;
        if (info != null) {
            mac = info.getMacAddress();
        }
        return mac;
    }

    /**
     * android 6.0及以上、7.0以下 获取mac地址
     */
    public static String getMacAddress(Context context) {
        // 如果是6.0以下，直接通过wifimanager获取
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
            String macAddress0 = getMacAddress0(context);
            if (!TextUtils.isEmpty(macAddress0)) {
                return macAddress0;
            }
        }
        return getMacAddress2();
    }

    public static String getMacAddress2() {
        String str = "";
        String macSerial = "";
        try {
            Process pp = Runtime.getRuntime().exec("cat /sys/class/net/wlan0/address");
            InputStreamReader ir = new InputStreamReader(pp.getInputStream());
            LineNumberReader input = new LineNumberReader(ir);
            for (; null != str; ) {
                str = input.readLine();
                if (str != null) {
                    macSerial = str.trim();// 去空格
                    break;
                }
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            Log.e("----->" + "NetInfoManager", "getMacAddress:" + ex.toString());
        }
        if (TextUtils.isEmpty(macSerial)) {
            try {
                return loadFileAsString("/sys/class/net/eth0/address").toUpperCase().substring(0, 17);
            } catch (Exception e) {
                e.printStackTrace();
                Log.e("----->" + "NetInfoManager", "getMacAddress:" + e.toString());
            }

        }
        return macSerial;
    }

    @SuppressLint("HardwareIds")
    private static String getMacAddress0(Context context) {
        if (isAccessWifiStateAuthorized(context)) {
            WifiManager wifiMgr = (WifiManager) context.getApplicationContext().getSystemService(Context.WIFI_SERVICE);
            WifiInfo wifiInfo = null;
            try {
                if (wifiMgr != null) {
                    wifiInfo = wifiMgr.getConnectionInfo();
                }
                if (wifiInfo != null) {
                    return wifiInfo.getMacAddress();
                }
            } catch (Exception e) {
                Log.e("----->" + "NetInfoManager", "getMacAddress0:" + e.toString());
            }
        }
        return "";

    }

    /**
     * Check whether accessing wifi state is permitted
     */
    private static boolean isAccessWifiStateAuthorized(Context context) {
        if (PackageManager.PERMISSION_GRANTED == context.checkCallingOrSelfPermission(Manifest.permission.ACCESS_WIFI_STATE)) {
            Log.d("----->" + "NetInfoManager", "isAccessWifiStateAuthorized:" + "access wifi state is enabled");
            return true;
        } else
            return false;
    }

    private static String loadFileAsString(String fileName) throws Exception {
        FileReader reader = new FileReader(fileName);
        String text = loadReaderAsString(reader);
        reader.close();
        return text;
    }

    private static String loadReaderAsString(Reader reader) throws Exception {
        StringBuilder builder = new StringBuilder();
        char[] buffer = new char[4096];
        int readLength = reader.read(buffer);
        while (readLength >= 0) {
            builder.append(buffer, 0, readLength);
            readLength = reader.read(buffer);
        }
        return builder.toString();
    }

    /**
     * 根据IP地址获取MAC地址
     */
    public static String getMacAddress() {
        String strMacAddr = null;
        try {
            // 获得IpD地址
            InetAddress ip = getLocalInetAddress();
            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);
            }
            strMacAddr = buffer.toString().toUpperCase();
        } catch (Exception e) {
            e.printStackTrace();
            Log.e("====", e.getMessage());
        }
        return strMacAddr;
    }

    /**
     * 获取移动设备本地IP
     */
    private static InetAddress getLocalInetAddress() {
        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;
    }

    /**
     * 获取本地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

    /**
     * 获取设备HardwareAddress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();
    }

    // android 7.0及以上 （3）通过busybox获取本地存储的mac地址

    /**
     * 根据busybox获取本地Mac
     *
     * @return
     */
    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")) {
            Mac = result.substring(result.indexOf("HWaddr") + 6,
                    result.length() - 1);
            result = Mac;
        }
        return result;
    }

    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;
    }

}
