'use strict';
const { CrudService } = require('naf-framework-mongoose/lib/service');
const { BusinessError, ErrorCode } = require('naf-core').Error;
const _ = require('lodash');
const assert = require('assert');
const fs = require('fs');
const path = require('path');
const PizZip = require('pizzip');
const Docxtemplater = require('docxtemplater');
const archiver = require('archiver');
const moment = require('moment');
// 企业需求
class InvestigationService extends CrudService {
  constructor(ctx) {
    super(ctx, 'investigation');
    this.model = this.ctx.model.Investigation;
    this.root_path = _.get(this.ctx.app.config.export, 'root_path');
    this.dir = [ 'question', 'investigation' ];
    this.exportPrefix = '企业需求调查表';
  }

  async query(filter, options = {}) {
    const { filter: nf, options: no } = this.ctx.service.util.util.dealQuery(_.cloneDeep(filter), _.cloneDeep(options));
    const { skip, limit, sort, projection } = no;
    const rs = await this.model.find(nf, projection, { skip, limit, sort }).exec();
    return rs;
  }

  async count(filter) {
    const nf = this.ctx.service.util.util.dealFilter(_.cloneDeep(filter));
    const res = await this.model.countDocuments(nf).exec();
    return res;
  }

  async export() {
    // 检验数据是否存在
    const data = await this.model.find();
    if (data.length <= 0) return '没有企业需求调查的数据';
    // 检测,创建目录
    let newPath = this.root_path;
    for (const p of this.dir) {
      newPath = path.join(newPath, p);
      if (!fs.existsSync(newPath)) {
        fs.mkdirSync(newPath);
      }
    }
    // 循环处理
    // 存储文件名, 为了之后打包文件,然后把压缩包内对应的文件删除掉
    const fileArray = [];
    for (const dup of data) {
      const d = _.omit(JSON.parse(JSON.stringify(dup)), [ 'meta' ]);
      d['meta.createdAt'] = moment(_.get(dup, 'meta.createdAt')).format('YYYY-MM-DD');
      for (const key in d) {
        const e = d[key];
        if (!_.isObject(e)) continue;
        for (const okey of Object.keys(e)) {
          d[`${key}.${okey}`] = e[okey];
        }
      }
      // 获取模板
      const content = fs.readFileSync(path.resolve('./', 'template', 'template.docx'));
      const zip = new PizZip(content);
      const doc = new Docxtemplater(zip, { paragraphLoop: true, linebreaks: true });
      doc.render(d);
      const buf = doc.getZip().generate({ type: 'nodebuffer' });
      const fileName = `${_.get(d, 'name', _.get(d, '_id'))}.docx`;
      fileArray.push(fileName);
      fs.writeFileSync(path.join(newPath, fileName), buf);
    }
    const zipPath = await this.buildZip(newPath, fileArray);
    return zipPath;
  }

  /**
   * 打zip包
   * @param {String} dirPath 路径
   * @param {Array} files 文件数组
   */
  async buildZip(dirPath, files) {
    const zipName = `${this.exportPrefix}-${new Date().getTime()}.zip`;
    const output = fs.createWriteStream(path.join(`${dirPath}`, zipName));
    const archive = archiver('zip', {
      zlib: { level: 9 },
    });
    archive.pipe(output);
    for (const f of files) {
      archive.file(path.join(dirPath, f), {
        name: path.basename(f),
      });
    }
    await archive.finalize();
    // 删除文件
    for (const f of files) {
      const filePath = path.join(dirPath, f);
      fs.unlinkSync(filePath);
    }
    // 拼接口返回的路径 /files/...
    const returnPath = `/files/${this.dir.join('/')}/${zipName}`;
    return returnPath;
  }
}

module.exports = InvestigationService;