package com.chinacreator.videoalliance.order.util;

import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;

public class IpAddrUtil {
	
	private static Logger logger = Logger.getLogger("iplog");
	
	 public static String getIpAddr2(HttpServletRequest request) {
		    String ip = request.getHeader("X-Real-IP");
		    if (inValidateIpAddr2(ip)) {
		      ip = request.getHeader("X-Forwarded-For");
		    }
		    if (inValidateIpAddr2(ip)) {
		      ip = request.getHeader("Proxy-Client-IP");
		    }
		    if (inValidateIpAddr2(ip)) {
		      ip = request.getHeader("WL-Proxy-Client-IP");
		    }
		    if (inValidateIpAddr2(ip)) {
		      ip = request.getHeader("clientip");
		    }
		    if (inValidateIpAddr2(ip)) {
		      ip = request.getRemoteAddr();
		    }
		    if (inValidateIpAddr2(ip)) {
		      ip = "null";
		    } else {
		      int index = ip.indexOf(",");
		      if (index != -1) {
		        ip = ip.substring(0, index);
		      }
		    }
		    return ip;
	 }
		
   private static boolean inValidateIpAddr2(String ip) {
		  return (ip == null) || (ip.length() == 0) || ("unknown".equalsIgnoreCase(ip));
   }	

	public static String getIpAddr(HttpServletRequest request) {
		String ip = request.getHeader("X-Real-IP");
		if (inValidateIpAddr(ip)) {
			ip = request.getHeader("X-Forwarded-For");
		}
		if (inValidateIpAddr(ip)) {
			ip = request.getHeader("Proxy-Client-IP");
		}
		if (inValidateIpAddr(ip)) {
			ip = request.getHeader("WL-Proxy-Client-IP");
		}
		if (inValidateIpAddr(ip)) {
			ip = request.getHeader("clientip");
		}
		if (inValidateIpAddr(ip)) {
			ip = request.getRemoteAddr();
		}
		if (inValidateIpAddr(ip)) {
			ip = "null";
		} else {
			int index = ip.indexOf(",");
			if (index != -1) {
				ip = ip.substring(0, index);
			}
		}
		return ip;
	}

	/**
	 * ip地址是否有效
	 * 
	 * @param ip
	 * @return true：无效，false有效
	 */
	private static boolean inValidateIpAddr(String ip) {
		return ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip) || ip.startsWith("10.") || ip.startsWith("172.") || ip.startsWith("192.");
	}

	public static String getHostIp() {
		try {
			Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();
			while (en.hasMoreElements()) {
				NetworkInterface intf = (NetworkInterface) en.nextElement();
				Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses();
				while (enumIpAddr.hasMoreElements()) {
					InetAddress inetAddress = (InetAddress) enumIpAddr.nextElement();
					if (!inetAddress.isLoopbackAddress() && !inetAddress.isLinkLocalAddress() && inetAddress.isSiteLocalAddress()) {
						return inetAddress.getHostAddress().toString();
					}
				}
			}
		} catch (SocketException e) {
			e.printStackTrace();
		}
		return null;
	}
	
    /**
     * 获取所有IP
     * @param request
     * @param channel
     * @return
     */
    public static List<String> getIpAddrList(HttpServletRequest request, String channel) {
    	printHeader(request, channel);
    	return getHeaderIps(request,channel);
    }  
    
	/**
	 * 输出IP地址信息
	 * @param request
	 */
	private static StringBuffer printHeader(HttpServletRequest request, String channel){
		StringBuffer sb = new StringBuffer();
		//sb.append("==============渠道=>"+channel+", header信息==============\r\n");
		//logger.info("remoteaddr=>"+request.getRemoteAddr());
		sb.append("name=>remoteaddr, value=>"+request.getRemoteAddr()+"\r\n");
		Enumeration er = request.getHeaderNames();//获取请求头的所有name值
		while(er.hasMoreElements()){
			String name	=(String) er.nextElement();
			String value = request.getHeader(name);
			sb.append("name=>"+name+", value=>"+value+"\r\n");
		}

		logger.info("\r\n================渠道=>"+channel+"的header信息=>\r\n"+sb.toString());
		return sb;
	}
	
	 /***
	  * 到请求头获取所有IP地址
	  * @param request
	  * @param channel 调用渠道标识
	  * @param remoteAddrChannel 需要取remoteAddr的IP的渠道
	  * @return
	  */
	 public static List<String> getHeaderIps(HttpServletRequest request, String channel) {
		 List<String> ipList = new ArrayList<String>();
		 addIps(ipList,request.getHeader("X-Forwarded-For"));
		 addIps(ipList,request.getHeader("X-Real-IP"));
		 addIps(ipList,request.getHeader("Proxy-Client-IP"));	
	 	 addIps(ipList,request.getHeader("WL-Proxy-Client-IP"));
	 	 addIps(ipList,request.getHeader("clientip"));
	 	 //X-Forwarded-For无值再到getRemoteAddr取
	 	 if(StringUtils.isEmpty(request.getHeader("X-Forwarded-For"))){
		 	 //是否有限制取remoteaddr的渠道
		 	 addIps(ipList,request.getRemoteAddr());
	 	 }
	 	 
		 return ipList;
	 }
	 
	 /**
	  * 添加IP到List，重复IP不添加
	  * @param ipList
	  * @param getip
	  */
	 private static void addIps(List<String> ipList, String getip){
		 //IP不能为空
		 if(StringUtils.isNotEmpty(getip)){
			 //可能有多个IP，用,分隔
			 String [] arrayip = getip.split(",");
			 for(String tmp : arrayip){
				 if(StringUtils.isNotEmpty(tmp) 
						 && StringUtils.isNotEmpty(tmp.trim())
						 && !ipList.contains(tmp.trim())){
					 //添加数据，重复不添加
					 ipList.add(tmp.trim());
				 }
			 }
		 }
	 }
}