import com.xgg.common.utils.str.StringUtils;
import lombok.extern.slf4j.Slf4j;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.HashMap;
import java.util.Map;

/**
 * IP相关工具类
 *
 * @author xiegege
 * @date 2021/02/22 16:08
 */
@Slf4j
public class IpUtil {

    /**
     * 获取当前网络ip
     */
    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = request.getHeader("x-forwarded-for");
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0 || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
            if ("127.0.0.1".equals(ipAddress) || "0:0:0:0:0:0:0:1".equals(ipAddress)) {
                // 根据网卡取本机配置的IP
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
                ipAddress = inet.getHostAddress();
            }
        }
        //对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割  //"***.***.***.***".length() = 15
        if (ipAddress != null && ipAddress.length() > 15) {
            if (ipAddress.indexOf(",") > 0) {
                ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }

    /**
     * 获取真实IP
     */
    public static String getRealIp(HttpServletRequest request) {
        String ip = request.getHeader("x-forwarded-for");
        return checkIp(ip) ? ip : (
                checkIp(ip = request.getHeader("Proxy-Client-IP")) ? ip : (
                        checkIp(ip = request.getHeader("WL-Proxy-Client-IP")) ? ip :
                                request.getRemoteAddr()));
    }

    /**
     * 校验IP
     */
    private static boolean checkIp(String ip) {
        return !StringUtils.isEmpty(ip) && !"unknown".equalsIgnoreCase(ip);
    }

    /**
     * 获取操作系统,浏览器及浏览器版本信息
     */
    public static Map<String, String> getOsAndBrowserInfo(HttpServletRequest request) {
        String userAgent = request.getHeader("User-Agent");
        String user = userAgent.toLowerCase();
        String os;
        String browser = "";

        //=================OS Info=======================
        if (userAgent.toLowerCase().contains("windows")) {
            os = "Windows";
        } else if (userAgent.toLowerCase().contains("mac")) {
            os = "Mac";
        } else if (userAgent.toLowerCase().contains("x11")) {
            os = "Unix";
        } else if (userAgent.toLowerCase().contains("android")) {
            os = "Android";
        } else if (userAgent.toLowerCase().contains("iphone")) {
            os = "IPhone";
        } else {
            os = "UnKnown, More-Info: " + userAgent;
        }

        //===============Browser===========================
        try {
            if (user.contains("edge")) {
                browser = (userAgent.substring(userAgent.indexOf("Edge")).split(" ")[0]).replace("/", "-");
            } else if (user.contains("msie")) {
                String substring = userAgent.substring(userAgent.indexOf("MSIE")).split(";")[0];
                browser = substring.split(" ")[0].replace("MSIE", "IE") + "-" + substring.split(" ")[1];
            } else if (user.contains("safari") && user.contains("version")) {
                browser = (userAgent.substring(userAgent.indexOf("Safari")).split(" ")[0]).split("/")[0]
                        + "-" + (userAgent.substring(userAgent.indexOf("Version")).split(" ")[0]).split("/")[1];
            } else if (user.contains("opr") || user.contains("opera")) {
                if (user.contains("opera")) {
                    browser = (userAgent.substring(userAgent.indexOf("Opera")).split(" ")[0]).split("/")[0]
                            + "-" + (userAgent.substring(userAgent.indexOf("Version")).split(" ")[0])