// ==UserScript==
// @name         重庆邮电大学学评教
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  重庆邮电大学学评教，一键好评
// @author       Roy Xie
// @match        http://jwzx.cqupt.edu.cn/jxpj/xpjstu.php
// @grant        none
// @license      MIT
// @downloadURL https://update.greasyfork.icu/scripts/437482/%E9%87%8D%E5%BA%86%E9%82%AE%E7%94%B5%E5%A4%A7%E5%AD%A6%E5%AD%A6%E8%AF%84%E6%95%99.user.js
// @updateURL https://update.greasyfork.icu/scripts/437482/%E9%87%8D%E5%BA%86%E9%82%AE%E7%94%B5%E5%A4%A7%E5%AD%A6%E5%AD%A6%E8%AF%84%E6%95%99.meta.js
// ==/UserScript==

;(function () {
  'use strict'

  const notionArea = document.createElement('template')
  notionArea.innerHTML = `
  <div style="text-align: right;">
    <button id="startXpjBtn">一键学评教</button>
    <div id="resultArea"></div>
  </div>`

  document.querySelector('.printTable').appendChild(notionArea.content)
  document.querySelector('#startXpjBtn').addEventListener('click', start)

  function start() {
    const searchBaseUrl = 'http://jwzx.cqupt.edu.cn/jxpj/xpjStuForm.php'
    const postBaseUrl = 'http://jwzx.cqupt.edu.cn/jxpj/post.php'
    const errorFlag = 'error flag'

    const links = Array.from(document.querySelectorAll('.xpjBtn'))
    const targets = links.map(a => a.href.split('?')[1])
    const resolve = document.createElement('div')
    let count = 0

    targets.forEach(async s => {
      const res = await fetch(searchBaseUrl + '?' + s)
        .then(res => res.text())
        .catch(e => errorFlag)

      if (res === errorFlag) {
        alert('脚本提示: 拉取元数据失败')
      } else {
        let postData = 'action=jxpj_edit&' + s
        resolve.innerHTML = res
        resolve
          .querySelectorAll(
            '.pTable tbody tr td:nth-of-type(2) > span:first-of-type input'
          )
          .forEach(i => {
            postData += `&${i.name}=${i.value}`
          })
        const courseName = resolve
          .querySelector('h3')
          .innerText.match(/【\S+】/g)[0]

        postData += '&zbCount=10'
        const { code, info } = await fetch(postBaseUrl, {
          headers: {
            'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
          },
          body: encodeURI(postData),
          method: 'post',
        }).then(res => res.json())

        if (code !== 0) {
          // 报告程序出错
          alert('脚本提示: ', info)
        } else {
          // todo 成功用户展示
          const resArea = document.querySelector('#resultArea')
          resArea.innerHTML += `<p>${courseName}评价完成</p>`

          if (++count === links.length) {
            count = 0

            let timer = 3
            const timerLeft = document.createElement('p')
            timerLeft.innerHTML = `<p id='timeLeft'>评价完成,将在${timer}秒后刷新</p>`
            resArea.appendChild(timerLeft)
            setInterval(() => {
              timerLeft.innerHTML = `<p id='timeLeft'>评价完成,将在${--timer}秒后刷新</p>`
              if (timer === 0) location.reload()
            }, 1000)
          }
        }
      }
    })
  }
})()