function cleanText(value) {
  return String(value || '')
    .replace(/\s+/g, ' ')
    .replace(/\u200b/g, '')
    .trim();
}

function pageText() {
  const body = document.body;
  return cleanText(body && (body.innerText || body.textContent || ''));
}

function isLoginBlocked(url, text) {
  return /\/signin\b|\/signup\b/.test(url) ||
    /登录|注册|验证码|安全验证|验证后继续|请先登录/.test(text);
}

function isVisible(node) {
  if (!node) {
    return false;
  }
  const rect = typeof node.getBoundingClientRect === 'function' ? node.getBoundingClientRect() : null;
  return !rect || rect.width > 0 || rect.height > 0;
}

function attrText(node, name) {
  if (!node || typeof node.getAttribute !== 'function') {
    return '';
  }
  return cleanText(node.getAttribute(name) || '');
}

function looksLikeTitleInput(node) {
  const signals = [
    attrText(node, 'placeholder'),
    attrText(node, 'data-placeholder'),
    attrText(node, 'aria-label'),
  ].filter(Boolean);
  return signals.some((value) => value.includes('标题'));
}

function dispatchTextInput(node) {
  node.dispatchEvent(new Event('input', { bubbles: true, composed: true }));
  node.dispatchEvent(new Event('change', { bubbles: true, composed: true }));
}

function fillInput(node, value) {
  node.focus();
  if ('value' in node) {
    node.value = '';
    dispatchTextInput(node);
    node.value = value;
    dispatchTextInput(node);
    return;
  }

  node.textContent = value;
  dispatchTextInput(node);
}

function fillEditable(node, value) {
  node.focus();
  node.innerHTML = '';
  const lines = String(value || '').split(/\n/);
  lines.forEach((line, index) => {
    if (index > 0) {
      node.appendChild(document.createElement('br'));
    }
    node.appendChild(document.createTextNode(line));
  });
  dispatchTextInput(node);
}

function findVisible(selectors) {
  for (const selector of selectors) {
    const nodes = Array.from(document.querySelectorAll(selector));
    const match = nodes.find((node) => {
      return isVisible(node);
    });
    if (match) {
      return match;
    }
  }
  return null;
}

function findBodyEditor(titleInput) {
  for (const selector of [
    "div[contenteditable='true'][role='textbox']",
    "div.public-DraftEditor-content[contenteditable='true']",
    "[role='textbox'][contenteditable='true']",
    "[contenteditable='true'][data-placeholder]",
    "div[contenteditable='true']",
  ]) {
    const nodes = Array.from(document.querySelectorAll(selector));
    const match = nodes.find((node) => isVisible(node) && node !== titleInput && !looksLikeTitleInput(node));
    if (match) {
      return match;
    }
  }
  return null;
}

function findButtonByText(fragment) {
  const candidates = Array.from(document.querySelectorAll("button, [role='button'], a"));
  const wanted = cleanText(fragment);
  return candidates.find((node) => {
    const text = cleanText(node.textContent);
    if (!text || !text.includes(wanted)) {
      return false;
    }
    return isVisible(node);
  }) || null;
}

const currentUrl = location.href;
const text = pageText();
if (isLoginBlocked(currentUrl, text)) {
  return {
    status: 'login_required',
    current_url: currentUrl,
  };
}

const titleInput = findVisible([
  "textarea[placeholder*='标题']",
  "input[placeholder*='标题']",
  "textarea[data-placeholder*='标题']",
  "input[data-placeholder*='标题']",
  "[role='textbox'][aria-label*='标题']",
  "[contenteditable='true'][aria-label*='标题']",
  "[contenteditable='true'][data-placeholder*='标题']",
]);
const bodyEditor = findBodyEditor(titleInput);

if (!titleInput || !bodyEditor) {
  return {
    status: 'editor_not_ready',
    current_url: currentUrl,
  };
}

fillInput(titleInput, String(args.title || ''));
fillEditable(bodyEditor, String(args.body || ''));

const publishMode = String(args.publish_mode || '').toLowerCase() === 'true';
if (!publishMode) {
  return {
    status: 'draft_ready',
    current_url: currentUrl,
    title: cleanText(args.title),
  };
}

const publishButton = findButtonByText('发布');
if (!publishButton) {
  return {
    status: 'publish_button_missing',
    current_url: currentUrl,
    title: cleanText(args.title),
  };
}
publishButton.click();

const confirmButton = findButtonByText('确认发布');
if (!confirmButton) {
  return {
    status: 'publish_clicked',
    current_url: currentUrl,
    title: cleanText(args.title),
  };
}
confirmButton.click();

return {
  status: 'publish_submitted',
  current_url: currentUrl,
  title: cleanText(args.title),
};