'use strict';
const xlsx = require('better-xlsx');
const path = require('path')
const moment = require('moment')

module.exports = function (app, opts) {
   async function simpleExcelDown ({ data = [], header = [], fileName = moment().format('YYYY-MM-DD HH:mm:ss') } = {}) {
      const fileDirPath = path.join(__dirname, `../../downloadFiles`)
      const file = new xlsx.File();
      const sheet_1 = file.addSheet('sheet_1');

      // header
      const headerRow = sheet.addRow();
      for (let h of header) {
         const cell = headerRow.addCell();
         cell.value = h.title;

         //设置文本在单元格内水平垂直居中
         cell.style.align.h = 'center';
         cell.style.align.v = 'center';

         // border(cell, 0, 0, 1, 0)
      }

      const savePath = path.join(fileDirPath, fileName + '.xlsx')
      await new Promise(function (resolve, reject) {
         file.saveAs()
            .pipe(fs.createWriteStream(savePath))
            .on('finish', () => {
               resolve()
            });
      })
      return savePath
   }

   return {
      simpleExcelDown
   }
}