package siterpc

import (
	"encoding/json"
	"errors"
)

/**
 * 获取code_bank一条可用记录
 * 2021/09/09
 * linsen
 */
func GetOneCode(site_id, dbname string, url ...string) (string, error) {

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

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

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

	arg := SiteConfigItemReqArg{site_id, dbname, ""}

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

	err = conn.GetOneCode(req, res)

	if err != nil {
		return "", err
	}

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

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

	if err != nil {
		return "", err
	}

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

	return bankCode, nil
}