// ==UserScript==
// @name         试题文本提取弹窗展示
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  提取考试题目与选项文字内容，弹窗展示并可复制
// @match        *://*.zhihuishu.com/*
// @grant        GM_addStyle
// @license       俄23423
// @downloadURL https://update.greasyfork.icu/scripts/533402/%E8%AF%95%E9%A2%98%E6%96%87%E6%9C%AC%E6%8F%90%E5%8F%96%E5%BC%B9%E7%AA%97%E5%B1%95%E7%A4%BA.user.js
// @updateURL https://update.greasyfork.icu/scripts/533402/%E8%AF%95%E9%A2%98%E6%96%87%E6%9C%AC%E6%8F%90%E5%8F%96%E5%BC%B9%E7%AA%97%E5%B1%95%E7%A4%BA.meta.js
// ==/UserScript==

(function () {
  'use strict';

  // 添加按钮样式
  GM_addStyle(`
    #extractBtn {
      position: fixed;
      bottom: 30px;
      right: 30px;
      z-index: 99999;
      background: #4caf50;
      color: white;
      border: none;
      padding: 10px 14px;
      border-radius: 6px;
      font-size: 14px;
      cursor: pointer;
      box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    }

    #popupContainer {
      position: fixed;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      z-index: 99999;
      background: white;
      padding: 20px;
      width: 600px;
      max-height: 80vh;
      overflow-y: auto;
      border-radius: 10px;
      box-shadow: 0 2px 20px rgba(0,0,0,0.3);
      display: none;
    }

    #popupContainer pre {
      white-space: pre-wrap;
      word-wrap: break-word;
      font-size: 14px;
    }

    #popupContainer button {
      margin-top: 10px;
      padding: 6px 12px;
      background: #1976d2;
      color: white;
      border: none;
      border-radius: 4px;
      cursor: pointer;
    }

    #popupContainer .close-btn {
      position: absolute;
      top: 10px;
      right: 15px;
      font-weight: bold;
      cursor: pointer;
      color: #aaa;
    }

    #popupContainer .close-btn:hover {
      color: #000;
    }
  `);

  function extractTextFromElement(element) {
    return element?.innerText?.trim().replace(/\s+/g, ' ') || '';
  }

  function extractAllQuestions() {
    const questions = document.querySelectorAll('.examPaper_subject');
    const result = [];

    questions.forEach((q, index) => {
      const questionObj = {};

      // 题号
      const num = q.querySelector('.subject_num span');
      questionObj.number = extractTextFromElement(num) || `Q${index + 1}`;

      // 题型
      const type = q.querySelector('.subject_type span:first-child');
      questionObj.type = extractTextFromElement(type);

      // 分数
      const score = q.querySelector('.subject_type span:last-child');
      questionObj.score = extractTextFromElement(score);

      // 题干
      const stem = q.querySelector('.subject_describe');
      questionObj.question = extractTextFromElement(stem);

      // 选项
      questionObj.options = [];
      const opts = q.querySelectorAll('.node_detail');

      opts.forEach(opt => {
        const label = opt.closest('.label')?.querySelector('.ABCase, .mr10')?.innerText?.trim();
        const text = extractTextFromElement(opt);
        if (label) {
          questionObj.options.push(`${label} ${text}`);
        }
      });

      result.push(questionObj);
    });

    return result;
  }

  function formatQuestions(questions) {
    return questions.map(q => {
      const options = q.options.map(opt => opt).join('\n');
      return `【${q.number}】${q.type} ${q.score}\n题干：${q.question}\n${options}\n`;
    }).join('\n----------------------\n');
  }

  function createPopup(content) {
    const popup = document.createElement('div');
    popup.id = 'popupContainer';
    popup.innerHTML = `
      <div class="close-btn">×</div>
      <pre id="popupText">${content}</pre>
      <button id="copyBtn">复制内容</button>
    `;
    document.body.appendChild(popup);

    // 关闭按钮
    popup.querySelector('.close-btn').addEventListener('click', () => {
      popup.style.display = 'none';
    });

    // 复制按钮
    popup.querySelector('#copyBtn').addEventListener('click', () => {
      const text = popup.querySelector('#popupText').innerText;
      navigator.clipboard.writeText(text).then(() => {
        alert('复制成功！');
      });
    });
  }

  function createExtractButton() {
    const btn = document.createElement('button');
    btn.id = 'extractBtn';
    btn.textContent = '提取题目';
    document.body.appendChild(btn);

    btn.addEventListener('click', () => {
      const questions = extractAllQuestions();
      const formatted = formatQuestions(questions);
      const popup = document.getElementById('popupContainer');
      if (popup) {
        popup.querySelector('#popupText').innerText = formatted;
        popup.style.display = 'block';
      } else {
        createPopup(formatted);
        document.getElementById('popupContainer').style.display = 'block';
      }
    });
  }

  // 延时初始化（避免页面还在加载）
  window.addEventListener('load', () => {
    setTimeout(() => {
      createExtractButton();
    }, 1000);
  });
})();