'use strict';
const { CrudService } = require('naf-framework-mongoose-free/lib/service');
const { BusinessError, ErrorCode } = require('naf-core').Error;
const _ = require('lodash');
const assert = require('assert');

// mysql数据库操作,针对单表
class MysqlService extends CrudService {
  constructor(ctx) {
    super(ctx, 'mysql');
    this.db = this.app.mysql;
  }
  async create(table, data) {
    const res = await this.db.insert(table, data);
    return res;
  }
  async delete(table, query = {}) {
    const res = await this.db.delete(table, query);
    return res;
  }
  async updateById(table, id, data) {
    const res = await this.db.update(table, { ...data, id });
    return res;
  }
  async query(table, query = {}, { skip, limit, sort = [], desc } = {}) {
    const queryParams = {};
    if (_.isNumber(skip) || _.isNumber(parseInt(skip))) queryParams.offset = skip;
    if (_.isNumber(limit) || _.isNumber(parseInt(limit))) queryParams.limit = limit;
    if (sort) {
      const orders = [];
      for (const s of sort) {
        const item = [ s, desc ? 'desc' : 'asc' ];
        orders.push(item);
      }
    }
    const data = await this.db.select(table, { where: query, ...queryParams });
    const total = await this.db.count(table, query);
    return { data, total };
  }
  async fetch(table, query) {
    const data = await this.db.get(table, query);
    return data;
  }
}

module.exports = MysqlService;