package couponrpc

import (
	"encoding/json"
	"errors"
)

func GetCouponInfo(dbname,couponId string, url ...string) (map[string]string, error) {

	if dbname == "" {
		return nil, errors.New("参数错误")
	}

	conn, err := rpc_server_conn(url...)

	if err != nil {
		return nil, err
	}
	defer conn.Close()

	arg := map[string]string{
		"dbname": dbname,
		"coupon_id": couponId,
	}

	req, err := SetReqData(arg)
	if err != nil {
		return nil, err
	}
	res := &CouponResponse{}

	err = conn.GetCouponInfo(req, res)

	if err != nil {
		return nil, err
	}

	res_data_de, err := GetResData(res)
	if err != nil {
		return nil, err
	}

	var couponInfo map[string]string
	err = json.Unmarshal([]byte(res_data_de),&couponInfo)

	if err != nil {
		return nil, err
	}

	if res_data_de == "" {
		return nil, nil
	}

	return couponInfo, nil
}