'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 GroupService extends CrudService {
  constructor(ctx) {
    super(ctx, 'group');
    this.model = this.ctx.model.Group;
    this.smodel = this.ctx.model.Student;
  }

  async insert(data) {
    const { groupid, stuid, stuname } = data;
    const group = await this.model.findById(groupid);
    const stuids = [];
    for (const student of group.students) {
      stuids.push(student.stuid);
    }
    if (stuids.includes(stuid)) {
      throw new BusinessError(
        ErrorCode.DATA_EXIST,
        '您已加入该组，请勿重复操作'
      );
    } else {
      group.students.push({ stuid, stuname });
      await group.save();
    }
  }

  async exit(data) {
    const { groupid, stuid } = data;
    const group = await this.model.findById(groupid);
    const students = group.students;
    for (const student of students) {
      if (student.stuid === stuid) {
        students.remove(student);
      }
    }
    await group.save();
  }

  // 设置学生为组长或组员
  async sethead(data) {
    const { groupid, stuid, type } = data;
    const group = await this.model.findById(groupid);
    const students = group.students;
    for (const student of students) {
      if (student.stuid === stuid) {
        student.type = type;
      }
    }
    await group.save();
    const student = await this.smodel.findById(stuid);
    if (type === '1') {
      student.jod = '组长';
    }
    if (type === '0') {
      student.jod = '普通学生';
    }
    await student.save();
  }

  async findbystuid(data) {
    const { stuid } = data;
    const _student = await this.smodel.findById(stuid);
    const groups = await this.model.find({ classid: _student.classid });
    let result;
    for (const group of groups) {
      const students = group.students;
      for (const student of students) {
        if (student.stuid === stuid) {
          result = group;
        }
      }
    }
    if (!result) {
      throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '该学生尚未进组');
    }
    return result;
  }

  async query({ skip, limit, ...info }) {
    const total = await this.model.count(info);
    const res = await this.model.find(info).skip(Number(skip)).limit(Number(limit));
    const data = [];
    for (const _group of res) {
      const stus = [];
      for (const stu of _group.students) {
        const student = await this.smodel.findById(stu.stuid);
        let job = '';
        if (student) {
          job = student.job;
        }
        stus.push({ ...JSON.parse(JSON.stringify(stu)), job });
      }
      const newdata = { ...JSON.parse(JSON.stringify(_group)) };
      newdata.students = stus;
      data.push(newdata);
    }
    return { total, data };
  }
}


module.exports = GroupService;