// ==UserScript==
// @name         批改网解除粘贴限制
// @namespace    http://tampermonkey.net/
// @version      91
// @description  解锁禁用的作文文本框，自动填充并提交（回车）
// @author       Rito
// @match        *://*.pigai.org/*
// @match        *://pigai.org/*
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  const STORAGE_KEY = 'pigai_custom_text';
  let myText = localStorage.getItem(STORAGE_KEY) || '';

  // 可能的提交按钮选择器（按页面实际改动）
  const SUBMIT_SELECTORS = [
    '#submit',            // 常见 id
    'button[type="submit"]',
    '.btn-submit',
    'input[type="submit"]',
    'a.submit'
  ];

  // 创建动态模糊 UI
  const createUI = () => {
    const container = document.createElement('div');
    container.style.cssText = `
      position: fixed;
      bottom: 20px;
      right: 20px;
      width: 320px;
      padding: 16px;
      background: rgba(255, 255, 255, 0.65);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.6);
      border-radius: 16px;
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
      z-index: 999999;
      font-family: system-ui, -apple-system, sans-serif;
      transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    `;

    const title = document.createElement('div');
    title.textContent = '🌟 批改网粘贴助手';
    title.style.cssText = `
      font-weight: 600;
      margin-bottom: 12px;
      color: #1d1d1f;
      font-size: 15px;
      letter-spacing: 0.5px;
    `;

    const textarea = document.createElement('textarea');
    textarea.placeholder = '在此输入或粘贴需要自动填充的作文内容...';
    textarea.value = myText;
    textarea.style.cssText = `
      width: 100%;
      height: 140px;
      padding: 10px;
      border: 1px solid rgba(0, 0, 0, 0.1);
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.85);
      resize: vertical;
      box-sizing: border-box;
      font-size: 13px;
      line-height: 1.5;
      margin-bottom: 12px;
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
      color: #333;
    `;
    textarea.addEventListener('focus', () => { 
      textarea.style.borderColor = '#007AFF'; 
      textarea.style.boxShadow = '0 0 0 3px rgba(0, 122, 255, 0.2)';
    });
    textarea.addEventListener('blur', () => { 
      textarea.style.borderColor = 'rgba(0, 0, 0, 0.1)'; 
      textarea.style.boxShadow = 'none';
    });

    const btnGroup = document.createElement('div');
    btnGroup.style.display = 'flex';
    btnGroup.style.gap = '10px';

    const fillBtn = document.createElement('button');
    fillBtn.textContent = '保存并填充';
    fillBtn.style.cssText = `
      flex: 1;
      padding: 10px 0;
      background: #007AFF;
      color: white;
      border: none;
      border-radius: 10px;
      cursor: pointer;
      font-weight: 600;
      font-size: 14px;
      transition: transform 0.1s, background 0.2s;
    `;
    fillBtn.onmouseover = () => fillBtn.style.background = '#0066d6';
    fillBtn.onmouseout = () => fillBtn.style.background = '#007AFF';
    fillBtn.onmousedown = () => fillBtn.style.transform = 'scale(0.96)';
    fillBtn.onmouseup = () => fillBtn.style.transform = 'scale(1)';

    const toggleBtn = document.createElement('button');
    toggleBtn.textContent = '收起';
    toggleBtn.style.cssText = `
      padding: 10px 14px;
      background: rgba(0, 0, 0, 0.04);
      color: #555;
      border: 1px solid rgba(0, 0, 0, 0.08);
      border-radius: 10px;
      cursor: pointer;
      font-size: 13px;
      font-weight: 500;
      transition: background 0.2s;
    `;
    toggleBtn.onmouseover = () => toggleBtn.style.background = 'rgba(0, 0, 0, 0.08)';
    toggleBtn.onmouseout = () => toggleBtn.style.background = 'rgba(0, 0, 0, 0.04)';

    fillBtn.addEventListener('click', () => {
      myText = textarea.value;
      localStorage.setItem(STORAGE_KEY, myText);
      if(myText.trim()){
         run();
      }
      fillBtn.textContent = '已完成 ✨';
      fillBtn.style.background = '#34C759';
      setTimeout(() => {
        fillBtn.textContent = '保存并填充';
        fillBtn.style.background = '#007AFF';
      }, 2000);
    });

    let isMinimized = false;
    toggleBtn.addEventListener('click', () => {
      isMinimized = !isMinimized;
      if (isMinimized) {
        textarea.style.display = 'none';
        fillBtn.style.display = 'none';
        title.style.display = 'none';
        toggleBtn.textContent = '📝 展开';
        toggleBtn.style.background = 'rgba(255, 255, 255, 0.8)';
        container.style.padding = '8px 12px';
        container.style.width = 'auto';
        container.style.borderRadius = '20px';
      } else {
        textarea.style.display = 'block';
        fillBtn.style.display = 'block';
        title.style.display = 'block';
        toggleBtn.textContent = '收起';
        toggleBtn.style.background = 'rgba(0, 0, 0, 0.04)';
        container.style.padding = '16px';
        container.style.width = '320px';
        container.style.borderRadius = '16px';
      }
    });

    container.appendChild(title);
    container.appendChild(textarea);
    btnGroup.appendChild(fillBtn);
    btnGroup.appendChild(toggleBtn);
    container.appendChild(btnGroup);

    document.body.appendChild(container);
  };

  // 解除页面全局复制/粘贴/选择限制（保险）
  const freeGlobal = () => {
    const props = ['oncopy', 'onpaste', 'oncut', 'onselectstart', 'oncontextmenu', 'ondragstart'];
    props.forEach(p => {
      document[p] = null;
      document.body && (document.body[p] = null);
    });
    document.body && (document.body.style.userSelect = 'text');
  };

  // 尝试找到 textarea（考虑 iframe 或动态渲染）
  const findTextarea = (root = document) => {
    return root.querySelector('#contents.from_contents, #contents, textarea#from_contents, textarea[name="contents"]');
  };

  // 解除禁用并填充
  const unlockAndFill = (ta, text) => {
    if (!text) return; // 空内容不填充
    // 移除禁用与阻断属性
    ['disabled', 'readonly', 'onpaste', 'oncopy', 'oncut', 'onselectstart'].forEach(attr => ta.removeAttribute(attr));
    ta.disabled = false;
    ta.readOnly = false;

    // 允许选择与输入
    ta.style.userSelect = 'text';
    ta.style.pointerEvents = 'auto';

    // 写入文本
    ta.value = text;

    // 触发事件，让页面识别变更
    ta.dispatchEvent(new Event('input', { bubbles: true }));
    ta.dispatchEvent(new Event('change', { bubbles: true }));

    // 模拟按键（Enter）
    const keydownEnter = new KeyboardEvent('keydown', {
      bubbles: true,
      cancelable: true,
      key: 'Enter',
      code: 'Enter',
      keyCode: 13,
      which: 13
    });
    ta.dispatchEvent(keydownEnter);

    const keyupEnter = new KeyboardEvent('keyup', {
      bubbles: true,
      cancelable: true,
      key: 'Enter',
      code: 'Enter',
      keyCode: 13,
      which: 13
    });
    ta.dispatchEvent(keyupEnter);
  };

  // 尝试点击提交按钮
  const trySubmit = () => {
    for (const sel of SUBMIT_SELECTORS) {
      const btn = document.querySelector(sel);
      if (btn) {
        btn.click();
        return true;
      }
    }
    return false;
  };

  // 处理可能存在的 iframe
  const forAllFrames = (fn) => {
    try {
      fn(document);
      const iframes = document.querySelectorAll('iframe');
      iframes.forEach(iframe => {
        try {
          const doc = iframe.contentDocument || iframe.contentWindow?.document;
          if (doc) fn(doc);
        } catch (e) { /* 跨域忽略 */ }
      });
    } catch (e) { /* 忽略 */ }
  };

  // 核心流程：解锁、填充、提交
  const run = () => {
    freeGlobal();

    forAllFrames((root) => {
      let ta = findTextarea(root);
      if (!ta) return;

      unlockAndFill(ta, myText);

      // 若页面监听 form 提交，尝试找到所在表单并提交
      const form = ta.closest('form');
      if (form) {
        // 触发 submit 事件
        const ok = form.dispatchEvent(new Event('submit', { bubbles: true, cancelable: true }));
        if (ok) {
          form.submit?.();
        }
      } else {
        // 尝试点击页面提交按钮
        trySubmit();
      }
    });
  };

  // 页面就绪后执行，多次重试应对异步渲染
  const start = () => {
    if (!myText.trim()) return; // 没内容则不自动运行
    let tries = 0;
    const maxTries = 20;
    const timer = setInterval(() => {
      tries++;
      run();
      // 如果找到了并填充，或者达到最大尝试次数就停
      const ta = findTextarea(document);
      if ((ta && ta.value && ta.value.trim().length > 0) || tries >= maxTries) {
        clearInterval(timer);
      }
    }, 500);
  };

  // MutationObserver：如果页面后续替换/重绘 textarea，自动再次填充
  const observe = () => {
    const mo = new MutationObserver(() => {
      const ta = findTextarea(document);
      if (ta && (!ta.value || ta.value.trim().length === 0) && myText.trim()) {
        unlockAndFill(ta, myText);
      }
    });
    mo.observe(document.documentElement, { childList: true, subtree: true });
  };

  // 提供一个快捷键：Ctrl+Shift+Enter 手动触发一次（可选）
  const hotkey = () => {
    document.addEventListener('keydown', (e) => {
      if (e.ctrlKey && e.shiftKey && e.key === 'Enter') {
        e.preventDefault();
        run();
      }
    }, true);
  };

  // 初始化
  window.addEventListener('load', () => {
    createUI();
    start();
    observe();
    hotkey();
    console.log('Ready: auto-fill engine initialized.');
  });
})();