package com.hdl.photovoltaic.utils;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.Enumeration;


public class NetworkUtils {

    private static NetworkUtils mNetworkUtils;


    public static NetworkUtils getInstance() {
        if (null == mNetworkUtils) {
            synchronized (NetworkUtils.class) {
                if (null == mNetworkUtils) {
                    mNetworkUtils = new NetworkUtils();
                }
            }
        }
        return mNetworkUtils;
    }

    /**
     * 获得IP地址，分为两种情况:
     * 一：是wifi下；
     * 二：是移动网络下；
     */
    public String getIPAddress(Context context) {
        NetworkInfo info = ((ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE)).getActiveNetworkInfo();
        if (info != null && info.isConnected()) {
            if (info.getType() == ConnectivityManager.TYPE_MOBILE) {//当前使用2G/3G/4G网络
                try {
                    //Enumeration<NetworkInterface> en=NetworkInterface.getNetworkInterfaces();
                    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() && inetAddress instanceof Inet4Address) {
                                return inetAddress.getHostAddress();
                            }
                        }
                    }
                } catch (SocketException e) {
                    e.printStackTrace();
                }
            } else if (info.getType() == ConnectivityManager.TYPE_WIFI) {//当前使用无线网络
                WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
                WifiInfo wifiInfo = wifiManager.getConnectionInfo();
                //调用方法将int转换为地址字符串
                String ipAddress = intIP2StringIP(wifiInfo.getIpAddress());//得到IPV4地址
                return ipAddress;
            }
        } else {
            //当前无网络连接,请在设置中打开网络
        }
        return null;
    }

    /**
     * 将得到的int类型的IP转换为String类型
     *
     * @param ip int类型
     * @return -
     */
    public static String intIP2StringIP(int ip) {
        return (ip & 0xFF) + "." +
                ((ip >> 8) & 0xFF) + "." +
                ((ip >> 16) & 0xFF) + "." +
                (ip >> 24 & 0xFF);
    }


}