package cn.ksource.web.facade.timetask;

import java.io.IOException;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.sql.Timestamp;
import java.text.ParseException;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;



public class LoginUtil {
	@SuppressWarnings("rawtypes")
	public static Map union400Login(String appver,String user,String pwd) throws ParseException, NoSuchAlgorithmException, IOException{
		
			//接收并处理传递参数
			Map<String, String> map = new HashMap<String, String>();
			map.put("appver", appver);
			map.put("user", user);
			//获取当前时间
			Timestamp endtime = new Timestamp(new Date().getTime());
			String time = String.valueOf(endtime);
			String time1 = time.replaceAll("-", "");
			String time2 = time1.replaceAll(":", "");
			String time3 = time2.replaceAll(" ", "");
			String time4 = time3.substring(0, time3.indexOf("."));//http请求时间为当前时间
			//计算Secrect
			map.put("timestamp", time4);
			String secret = signTopRequest(map, pwd);
			map.put("secret", secret);
			return map;
	}
	public static String signTopRequest(Map<String, String> params, String token) throws IOException, NoSuchAlgorithmException {
	    //1 删除secret
		params.remove("secret");
		
		//2检查参数是否已经排序
	    String[] keys = params.keySet().toArray(new String[0]);
	    Arrays.sort(keys);
	 
	    //3把所有参数名和参数值串在一起
	    StringBuilder query = new StringBuilder();
	    for (String key : keys) {
	        String value = params.get(key);
	        if (!"".equals(key) && key!=null && !"".equals(value) && value!=null) {
	            query.append(URLEncoder.encode(key,"utf8")).append(URLEncoder.encode(value,"utf8"));
	        }
	    }
	 
	    //4使用MD5加密
	    query.append(token);
	    byte[] bytes=encryptMD5(query.toString());
	    
	    //5转换为字符串
	    return byte2hex(bytes);
	}
	public  static byte[] encryptMD5(String data) throws IOException, NoSuchAlgorithmException {
		MessageDigest md5=MessageDigest.getInstance("MD5");
        return md5.digest(data.getBytes("utf-8"));
	}
	public  static String byte2hex(byte[] bytes) {
	    StringBuilder sign = new StringBuilder();
	    for (int i = 0; i < bytes.length; i++) {
	        String hex = Integer.toHexString(bytes[i] & 0xFF);
	        if (hex.length() == 1) {
	            sign.append("0");
	        }
	        sign.append(hex.toUpperCase());
	    }
	    return sign.toString();
	}
}