'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');
const { ObjectId } = require('mongoose').Types;

// 学生视图接口
class StudentService extends CrudService {
  constructor(ctx) {
    super(ctx, 'lessonprivate');
    this.lessonModel = this.ctx.model.Business.Lesson;
    this.lessonStudentModel = this.ctx.model.Business.LessonStudent;
  }
  async lessonList({ student_id, school_id, skip = 0, limit = 0, ...otherQuery }) {
    // 查出该学生的课表
    const query = {};
    if (student_id)query.student_id = student_id;
    if (school_id) query.school_id = school_id;
    const lsList = await this.lessonStudentModel.find(query, { lesson_id: 1, is_pay: 1, is_try: 1, is_sign: 1 });
    const lessonIds = lsList.map(i => i.lesson_id);
    let data = await this.lessonModel.find({ _id: lessonIds, ...otherQuery }).skip(parseInt(skip)).limit(parseInt(limit));
    if (data.length > 0) data = JSON.parse(JSON.stringify(data));
    data = data.map(i => {
      const { _id } = i;
      const r = lsList.find(f => ObjectId(f.lesson_id).equals(_id));
      if (r) i = { ...i, ..._.pick(r, [ 'is_try', 'is_pay', 'is_sign' ]) };
      return i;
    });
    const total = await this.lessonModel.count({ _id: lessonIds, ...otherQuery });
    return { data, total };
  }
}

module.exports = StudentService;