'use strict';


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

class ScoreService extends CrudService {
  constructor(ctx) {
    super(ctx, 'score');
    this.model = this.ctx.model.Score;
    this.tmodel = this.ctx.model.Teacher;
  }

  async create(data) {
    const { teacherid, score } = data;
    const teacher = await this.tmodel.findById(teacherid);
    let newscore;
    if (!teacher.xsscore) {
      newscore = score;
    } else {
      const xsscore = teacher.xsscore;
      const number = await this.model.count({ teacherid });
      newscore = (Number(xsscore) * number + Number(score)) / (number + 1);

    }
    teacher.xsscore = newscore;
    await teacher.save();
    return await this.model.create(data);
  }

}

module.exports = ScoreService;