package cn.ksource.web.controller.wxpay.util;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Map;

import cn.ksource.core.util.ConvertUtil;
import cn.ksource.core.util.StringUtil;
import cn.ksource.web.controller.wxpay.WxNativeConfig;

/**
 * User: rizenguo
 * Date: 2014/10/29
 * Time: 15:23
 */
public class Signature {
    /**
     * 签名算法
     * @param o 要参与签名的数据对象
     * @return 签名
     * @throws IllegalAccessException
     */
    public static String getSign(Object o) throws IllegalAccessException {
        ArrayList<String> list = new ArrayList<String>();
        Class cls = o.getClass();
        Field[] fields = cls.getDeclaredFields();
        for (Field f : fields) {
            f.setAccessible(true);
            if (f.get(o) != null && f.get(o) != "") {
                list.add(f.getName() + "=" + f.get(o) + "&");
            }
        }
        int size = list.size();
        String [] arrayToSort = list.toArray(new String[size]);
        Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
        StringBuilder sb = new StringBuilder();
        for(int i = 0; i < size; i ++) {
            sb.append(arrayToSort[i]);
        }
        String result = sb.toString();
        result += "key=" + WxNativeConfig.key;
        result = MD5.MD5Encode(result).toUpperCase();
        return result;
    }

    public static String getSign(Map<String,Object> map){
        ArrayList<String> list = new ArrayList<String>();
        for(Map.Entry<String,Object> entry:map.entrySet()){
            if(StringUtil.notEmpty(ConvertUtil.obj2StrBlank(entry.getValue()))){
                list.add(entry.getKey() + "=" + entry.getValue() + "&");
            }
        }
        int size = list.size();
        String [] arrayToSort = list.toArray(new String[size]);
        Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
        StringBuilder sb = new StringBuilder();
        for(int i = 0; i < size; i ++) {
            sb.append(arrayToSort[i]);
        }
        String result = sb.toString();
        result += "key=" + WxNativeConfig.key;
        //Util.log("Sign Before MD5:" + result);
        result = MD5.MD5Encode(result).toUpperCase();
        //Util.log("Sign Result:" + result);
        return result;
    }
    
    
    
    public static String getSignMap(Map<String,String> map){
        ArrayList<String> list = new ArrayList<String>();
        for(Map.Entry<String,String> entry:map.entrySet()){
            if(StringUtil.notEmpty(ConvertUtil.obj2StrBlank(entry.getValue()))){
                list.add(entry.getKey() + "=" + entry.getValue() + "&");
            }
        }
        int size = list.size();
        String [] arrayToSort = list.toArray(new String[size]);
        Arrays.sort(arrayToSort, String.CASE_INSENSITIVE_ORDER);
        StringBuilder sb = new StringBuilder();
        for(int i = 0; i < size; i ++) {
            sb.append(arrayToSort[i]);
        }
        String result = sb.toString();
        result += "key=" + WxNativeConfig.key;
        //Util.log("Sign Before MD5:" + result);
        result = MD5.MD5Encode(result).toUpperCase();
        //Util.log("Sign Result:" + result);
        return result;
    }

}