const _ = require('lodash');
const md5 = require('yoho-md5');

const yoho = {
    getSign(params, clientSecret) {
        let secretParams = {},
            secretStr = '';

        for (const k of Object.keys(params).sort()) {
            if (k === 'yh_sign') {
                continue;
            }
            secretParams[k] = params[k];
        }
        secretStr = _.join(_.map(secretParams, (v, k) => {
            return `${k}=${v}`;
        }), '&');
        return md5(secretStr + clientSecret);
    }
};

module.exports = yoho;