package com.xzx.gc.common.utils.payutil;

import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import java.security.MessageDigest;
import java.text.SimpleDateFormat;
import java.util.*;

@Service
@Slf4j
public class WxRequestParam {

    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");

    /**
     * 小程序现金红包支付参数
     * @param m
     * @return
     */
    public String getXcxParam(Map<String, String> m){

        //四位随机数
        String mchBillno = WxConfig.MCH_ID+sdf.format(new Date())+(int)((Math.random()*9+1)*1000000000);
        String nonceStr = UUID.randomUUID().toString().replace("-", "");
        // 备注
        String remark = "beizhu";
        // 祝福语
        String wishing = "gongxifacai";
        // 场景id
        String sceneId = "PRODUCT_1";
        // 活动名称
        String actName = "gongxifacai";
        // 商户名称（微信红包发送者名称,最好用英文）
        String sendName = "xiaozongxiao";
        // 红包发放总人数
        String totalNum = "1";

        SortedMap<String, String> packageParams = new TreeMap<>();
        // 活动名称
        packageParams.put("act_name", actName);
        // 用户openId
        packageParams.put("re_openid", m.get("reOpenid"));
        // 商户名称（微信红包发送者名称,最好用英文）
        packageParams.put("send_name", sendName);
        // 红包金额
        packageParams.put("total_amount", m.get("totalAmount"));
        // 红包发放总人数
        packageParams.put("total_num", totalNum);
        // 通知用户形式
        packageParams.put("notify_way", WxConfig.WX_NOTITY_WAY);
        // 备注
        packageParams.put("remark", remark);
        // 商户订单号
        packageParams.put("mch_billno", mchBillno);
        // 商户号
        packageParams.put("mch_id", WxConfig.MCH_ID);
        // /随机字符串
        packageParams.put("nonce_str",nonceStr);
        // 场景id
        packageParams.put("scene_id", sceneId);
        // 红包祝福语
        packageParams.put("wishing", wishing);
        // 公众账号appid
        packageParams.put("wxappid", WxConfig.WXAPP_ID);

        //生成签名
        String sign = createSign(packageParams,WxConfig.WX_API_KEY,"UTF-8");
        String param="<xml>"+
                "<nonce_str>"+packageParams.get("nonce_str")+"</nonce_str>"+
                "<sign>"+sign+"</sign>"+
                "<mch_billno>"+packageParams.get("mch_billno")+"</mch_billno>"+
                "<mch_id>"+packageParams.get("mch_id")+"</mch_id>"+
                "<wxappid>"+packageParams.get("wxappid")+"</wxappid>"+
                "<send_name>"+packageParams.get("send_name")+"</send_name>"+
                "<re_openid>"+packageParams.get("re_openid")+"</re_openid>"+
                "<total_amount>"+packageParams.get("total_amount")+"</total_amount>"+
                "<total_num>"+packageParams.get("total_num")+"</total_num>"+
                "<wishing>"+packageParams.get("wishing")+"</wishing>"+
                "<act_name>"+packageParams.get("act_name")+"</act_name>"+
                "<remark>"+packageParams.get("remark")+"</remark>"+
                "<notify_way>"+packageParams.get("notify_way")+"</notify_way>"+
                "<scene_id>"+packageParams.get("scene_id")+"</scene_id>"+
                "</xml>";
        return param;
    }

    /**
     * 获取企业支付的支付参数
     * @param m
     */
    public String getQiyePayParam(Map<String, String> m){
        //四位随机数
        String mchBillno = WxConfig.MCH_ID+sdf.format(new Date())+(int)((Math.random()*9+1)*1000000000);
        String nonceStr = UUID.randomUUID().toString().replace("-", "");

        SortedMap<String, String> packageParams = new TreeMap<>();

        // 企业付款金额，单位为分
        packageParams.put("amount", m.get("totalAmount"));
        // 商户appid下，某用户的openid
        packageParams.put("openid", m.get("reOpenid"));

        // 申请商户号的appid或商户号绑定的appid
        packageParams.put("mch_appid", WxConfig.WXAPP_ID);
        // 微信支付分配的商户号
        packageParams.put("mchid", WxConfig.MCH_ID);
        // 微信支付分配的终端设备号
        // packageParams.put("device_info", "");
        // 随机字符串，不长于32位
        packageParams.put("nonce_str", nonceStr);
        // 商户订单号，需保持唯一性(只能是字母或者数字，不能包含有其他字符)
        packageParams.put("partner_trade_no", mchBillno);
        // NO_CHECK：不校验真实姓名 FORCE_CHECK：强校验真实姓名
        packageParams.put("check_name", "NO_CHECK");
        // 收款用户真实姓名。 如果check_name设置为FORCE_CHECK，则必填用户真实姓名
        packageParams.put("re_user_name", "xx");
        // 企业付款备注
        packageParams.put("desc", "remark");
        // Ip地址
        packageParams.put("spbill_create_ip", "0.0.0.0");

        //生成签名
        String sign = createSign(packageParams,WxConfig.WX_API_KEY,"UTF-8");

        String param="<xml>"+
                "<mch_appid>"+packageParams.get("mch_appid")+"</mch_appid>"+
                "<sign>"+sign+"</sign>"+
                "<mchid>"+packageParams.get("mchid")+"</mchid>"+
                "<nonce_str>"+packageParams.get("nonce_str")+"</nonce_str>"+
                "<partner_trade_no>"+packageParams.get("partner_trade_no")+"</partner_trade_no>"+
                "<openid>"+packageParams.get("openid")+"</openid>"+
                "<check_name>"+packageParams.get("check_name")+"</check_name>"+
                "<re_user_name>"+packageParams.get("re_user_name")+"</re_user_name>"+
                "<amount>"+packageParams.get("amount")+"</amount>"+
                "<desc>"+packageParams.get("desc")+"</desc>"+
                "<spbill_create_ip>"+packageParams.get("spbill_create_ip")+"</spbill_create_ip>"+
                "</xml>";
        return param;
    }

    String createSign(SortedMap<String, String> paraMap,String key,String charset) {
        StringBuffer sb = new StringBuffer();
        Set es = paraMap.entrySet();
        Iterator it = es.iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String k = (String) entry.getKey();
            String v = (String) entry.getValue();
            if (null != v && !"".equals(v) && !"sign".equals(k)
                    && !"key".equals(k)) {
                sb.append(k + "=" + v + "&");
            }
        }
        sb.append("key=" + key);
        System.out.println("===========签名参数====="+sb.toString());
        String sign = md5Password(sb.toString()).toUpperCase();
        // String sign = MD5Util.encode(sb.toString()).toUpperCase();
        System.out.println("===========生成的签名是====="+sign);
        return sign;

    }

    /**
     * 生成32位md5码
     *
     * @param key
     * @return
     */
    static String md5Password(String key) {
        char hexDigits[] = {
                '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
        };
        try {
            byte[] btInput = key.getBytes();
            // 获得MD5摘要算法的 MessageDigest 对象
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            // 使用指定的字节更新摘要
            mdInst.update(btInput);
            // 获得密文
            byte[] md = mdInst.digest();
            // 把密文转换成十六进制的字符串形式
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for (int i = 0; i < j; i++) {
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e) {
            return null;
        }
    }



}