// ==UserScript==
// @name         Extract All URLs From HTML
// @namespace    Violentmonkey Scripts
// @version      1.0
// @description  點一下按鈕，從整個網頁 HTML 中抓出所有 http/https 網址並列表顯示
// @match        *://*/*
// @grant        GM_setClipboard
// @downloadURL none
// ==/UserScript==

(function () {
  'use strict';

  function extractUrlsFromHtml() {
    const html = document.documentElement.outerHTML;

    // 抓 http / https URL
    const regex = /https?:\/\/[^\s"'<>`]+/g;
    const matches = html.match(regex) || [];

    // 去重
    const uniqueUrls = [...new Set(matches)];

    return uniqueUrls;
  }

  function createPanel(urls) {
    const oldPanel = document.getElementById('vm-url-extract-panel');
    if (oldPanel) oldPanel.remove();

    const panel = document.createElement('div');
    panel.id = 'vm-url-extract-panel';
    panel.style.position = 'fixed';
    panel.style.top = '20px';
    panel.style.right = '20px';
    panel.style.zIndex = '999999';
    panel.style.width = '600px';
    panel.style.maxHeight = '80vh';
    panel.style.background = '#fff';
    panel.style.color = '#000';
    panel.style.border = '1px solid #999';
    panel.style.boxShadow = '0 4px 12px rgba(0,0,0,0.3)';
    panel.style.padding = '12px';
    panel.style.overflow = 'hidden';
    panel.style.fontSize = '14px';

    const title = document.createElement('div');
    title.style.fontWeight = 'bold';
    title.style.marginBottom = '8px';
    title.textContent = `找到 ${urls.length} 個網址`;
    panel.appendChild(title);

    const buttonRow = document.createElement('div');
    buttonRow.style.marginBottom = '8px';

    const copyBtn = document.createElement('button');
    copyBtn.textContent = '複製全部';
    copyBtn.style.marginRight = '8px';
    copyBtn.onclick = () => {
      const text = urls.join('\n');
      if (typeof GM_setClipboard === 'function') {
        GM_setClipboard(text);
      } else {
        navigator.clipboard.writeText(text).catch(() => {});
      }
    };
    buttonRow.appendChild(copyBtn);

    const closeBtn = document.createElement('button');
    closeBtn.textContent = '關閉';
    closeBtn.onclick = () => panel.remove();
    buttonRow.appendChild(closeBtn);

    panel.appendChild(buttonRow);

    const textarea = document.createElement('textarea');
    textarea.style.width = '100%';
    textarea.style.height = '65vh';
    textarea.style.boxSizing = 'border-box';
    textarea.value = urls.join('\n');
    panel.appendChild(textarea);

    document.body.appendChild(panel);
  }

  function createTriggerButton() {
    const btn = document.createElement('button');
    btn.textContent = '抓網址';
    btn.style.position = 'fixed';
    btn.style.right = '20px';
    btn.style.bottom = '20px';
    btn.style.zIndex = '999999';
    btn.style.padding = '10px 14px';
    btn.style.background = '#1976d2';
    btn.style.color = '#fff';
    btn.style.border = 'none';
    btn.style.borderRadius = '6px';
    btn.style.cursor = 'pointer';
    btn.style.boxShadow = '0 2px 8px rgba(0,0,0,0.3)';

    btn.addEventListener('click', () => {
      const urls = extractUrlsFromHtml();
      createPanel(urls);
    });

    document.body.appendChild(btn);
  }

  window.addEventListener('load', () => {
    createTriggerButton();
  });
})();