'use strict';


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

class UtilService extends CrudService {
  async updatedate() {
    let date = new Date();
    date = moment(date).format('YYYY-MM-DD HH:mm:ss');
    return date;
  }

  async sendMail(email, subject, text, html) {
    const setting = await this.ctx.model.Setting.findOne();
    let user_email = this.ctx.app.config.user_email;
    let auth_code = this.ctx.app.config.auth_code;
    if (setting) {
      user_email = setting.user_email;
      auth_code = setting.auth_code;
    }
    const transporter = nodemailer.createTransport({
      host: 'smtp.exmail.qq.com',
      secureConnection: true,
      port: 465,
      auth: {
        user: user_email, // 账号
        pass: auth_code, // 授权码
      },
    });
    const mailOptions = {
      from: user_email, // 发送者,与上面的user一致
      to: email, // 接收者,可以同时发送多个,以逗号隔开
      subject, // 标题
      text, // 文本
      html,
    };

    try {
      await transporter.sendMail(mailOptions);
      return true;
    } catch (err) {
      return false;
    }
  }

  async findone({ modelname }, data) {
    // 查询单条
    const _model = _.capitalize(modelname);
    const res = await this.ctx.model[_model].findOne({ ...data });
    return res;
  }

  async findbyids({ modelname }, { data }) {
    // 共通批量查询方法
    const _model = _.capitalize(modelname);
    const res = [];
    for (const elm of data) {
      const result = await this.ctx.model[_model].findById(elm);
      res.push(result);
    }
    return res;
  }

  async findmodel({ modelname }) {
    // TODO找到这个班级
    // const tclass = { name: '1', term: '', batch: '' };
    // 首先用名字找能不能对上,名字能对上直接把班级信息复制过来
    // 名字对不上就根据当前班级的期找下本期的所有班,然后找到和他同批次的班级,查下它是第几位,按照这个位置去把模板的同位置班级信息复制过来

    // 获取所有年度的期计划

    // 处理学生入学年份超过4位的情况
    // const list = await this.ctx.model.Student.find({ $where: 'this.entry_year.length>4' });
    // const m = /^\w{4}/;
    // for (const stu of list) {
    //   const { entry_year } = stu;
    //   const r = entry_year.match(m);
    //   if (r) {
    //     stu.entry_year = r[0];
    //     stu.save();
    //   }
    // }
    // 处理学生毕业年份超过4位的情况
    // const list = await this.ctx.model.Student.find({ $where: 'this.finish_year.length>4' });
    // const m = /^\w{4}/;
    // for (const stu of list) {
    //   const { finish_year } = stu;
    //   const r = finish_year.match(m);
    //   if (r) {
    //     stu.finish_year = r[0];
    //     stu.save();
    //   }
    // }
    // 处理学生专业字段(major)带'专业'二字
    // const stuList = await this.ctx.model.Student.find({ major: /专业/ });
    // const m = /(\S+)(专业$)/;
    // for (const stu of stuList) {
    //   const { name, major } = stu;
    //   const r = major.match(m);
    //   let nm;
    //   if (r) nm = r[1];
    //   stu.major = nm;
    //   stu.save();
    // }
    // 处理教师分数错误的初始化
    // // 所有教师的分数都复制到beforescore上,xsscore需要重新计算
    // const list = await this.ctx.model.Teacher.find();
    // console.log(list.length);
    // for (const tea of list) {
    //   if (tea.xsscore) {
    //     tea.beforescore = tea.xsscore;
    //     await tea.save();
    //   }
    // }
  }

  async toExcel(dataList, meta, fn = '导出结果') {
    // 导出excel
    const { app } = this;
    const nowDate = new Date().getTime();
    const filename = `${fn}-${nowDate}.xlsx`;
    // 取出预设存储地址
    const rootPath = `${app.config.cdn.repos_root_path}`;
    const rooturl = `${app.config.cdn.repos_root_url_excel}`;
    const path = `${rootPath}${rooturl}`;
    if (!path) {
      throw new BusinessError(ErrorCode.BUSINESS, '服务端没有设置存储路径');
    }
    // 如果不存在文件夹,就创建
    if (!fs.existsSync(path)) {
      fs.mkdirSync(path);
    }
    // 生成文件
    const filepath = `${path}${filename}`;
    fs.createWriteStream(filepath);
    const workbook = new Excel.Workbook();
    const sheet = workbook.addWorksheet('sheet');
    sheet.columns = meta;
    sheet.addRows(dataList);
    await workbook.xlsx.writeFile(filepath);
    return `/files/excel/${filename}`;
  }

  /**
   * 导出docx
   * @param {Array} data 数据[{title,content([]),author}]
   * @param {String} fn 文件名
   */
  async toDocx(data, fn = '培训心得') {
    const { Document, Packer, Paragraph, TextRun, HeadingLevel, AlignmentType } = docx;
    const doc = new Document();
    const children = [];
    // 整理数据
    for (let i = 0; i < data.length; i++) {
      const obj = data[i];
      const { title, content, author } = obj;
      const c = [];
      if (title) {
        const tit = new Paragraph({
          children: [ new TextRun({ text: title, bold: true }) ],
          heading: HeadingLevel.TITLE,
          alignment: AlignmentType.CENTER,
        });
        c.push(tit);
      }
      if (author) {
        const auth = new Paragraph({
          children: [ new TextRun({ color: '#000000', text: author }) ],
          heading: HeadingLevel.HEADING_2,
          alignment: AlignmentType.RIGHT,
        });
        c.push(auth);
      }
      if (content && _.isArray(content) && content.length > 0) {
        for (const cont of content) {
          const p = new Paragraph({
            children: [ new TextRun({ text: cont, bold: true }) ],
          });
          c.push(p);
        }
      }
      if (i !== data.length - 1) {
        // 换页
        const last = new Paragraph({
          pageBreakBefore: true,
        });
        c.push(last);
      }
      if (c.length > 0) children.push(...c);
    }
    doc.addSection({
      properties: {},
      children,
    });

    const { app } = this;
    const rootPath = `${app.config.cdn.repos_root_path}`;
    const rooturl = `${app.config.cdn.repos_root_url_experience}`;
    const path = `${rootPath}${rooturl}`;
    const num = new Date().getTime();
    Packer.toBuffer(doc).then(buffer => {
      fs.writeFileSync(`${path}${fn}-${num}.docx`, buffer);
    });
    return `/files${rooturl}${fn}-${num}.docx`;
  }
}

module.exports = UtilService;