const { Service } = require('egg');

const sha256 = require("crypto-js/sha256");

const CryptoJS = require("crypto-js");

const KEY = CryptoJS.enc.Utf8.parse('BDQH');

class BaseService extends Service {
    shaForm = (body, salt) => {
        return sha256(sha256(body).toString() + salt).toString();
    }

    encryptRequest = (body) => {
        return CryptoJS.AES.encrypt(body, KEY, {
            mode: CryptoJS.mode.ECB,
            padding: CryptoJS.pad.Pkcs7
        }).toString();
    }

    decryptRequest = (body) => {
        return CryptoJS.AES.decrypt(body, KEY, {
            mode: CryptoJS.mode.ECB,
            padding: CryptoJS.pad.Pkcs7
        }).toString(CryptoJS.enc.Utf8);
    }

    opOptions = (attributes, searchOptions, substring, key, between, sortOptions) => {
        let where = {}, order = [];
        attributes.forEach(element => {
            if (searchOptions[element]) {
                if (substring.includes(element)) {
                    where[element] = { [Op.substring]: searchOptions[element] };
                } else if (key.includes(element)) {
                    where[element] = searchOptions[element];
                } else if (between.includes(element)) {
                    where[element] = { [Op.between]: [searchOptions[element][0], searchOptions[element][1]] };
                }
            }
            if (!sortOptions[element]) {
                order.push([element, 'DESC']);
            } else if (sortOptions[element]) {
                order.push([element, 'ASC']);
            }
        });
        return { where, order }
    }
}

module.exports = BaseService;