/** WeChat short follow-ups that continue an in-session page or poem without a full new topic. */

const PAGE_DECORATORS =
  '(?:精美(?:的)?|漂亮(?:的)?|好看(?:的)?|简约(?:的)?|优雅(?:的)?)';

export const PAGE_RETRY_PATTERN =
  /^(?:(?:请|麻烦|可以|能不能)\s*)?(?:(?:帮我|帮忙|给我)\s*)?重试(?:上次|上一个)?页面[。.!！\s]*$/iu;

export const PAGE_EDIT_PATTERN =
  /^(?:(?:请|麻烦|可以|能不能)\s*)?(?:(?:帮我|帮忙|给我)\s*)?(?:(?:把|将)\s*)?(?:(?:这个|刚才(?:的)?|上面(?:的)?|前面(?:的)?|上一条|它|刚才(?:生成|做|弄)(?:的)?|上面(?:生成|做|弄)(?:的)?)\s*)?(?:的)?\s*(?:页面|网页|html)?\s*(?:的)?\s*(?:内容|标题|背景|样式|排版|封面|页脚|字体|颜色)?\s*(?:改|修改|调整|更新|换|优化|美化)/iu;

export const PAGE_IMMEDIATE_CREATE_PATTERN =
  new RegExp(
    '^'
      + '(?:(?:请|麻烦|可以|能不能)\\s*)?'
      + '(?:(?:帮我|帮忙|给我)\\s*)?'
      + '(?:(?:把\\s*)?(?:这个|刚才(?:的)?(?:诗|文章|内容)?|上面(?:的)?|前面(?:的)?|上一条|它|这首(?:诗)?|这篇(?:文章)?|这段(?:内容)?)\\s*)?'
      + '(?:继续\\s*)?'
      + '(?:做|弄|改|转|写|排版|生成|制作)(?:成|为)?\\s*'
      + '(?:一个|个)?'
      + '(?:(?:\\s*'
      + PAGE_DECORATORS
      + '){1,3}\\s*(?:h5|html)|(?:\\s*(?:h5|html)))?'
      + '\\s*(?:页面|网页)(?:吧|呀|呢|一下)?[。.!！\\s]*'
      + '$',
    'iu',
  );

export const PAGE_CONTENT_EDIT_PATTERN =
  /^(?:(?:请|麻烦|可以|能不能)\s*)?(?:(?:帮我|帮忙|给我)\s*)?(?:(?:把|将)\s*)?(?:(?:这个|刚才(?:的)?|上面(?:的)?|前面(?:的)?|它|这首(?:诗)?|这篇(?:文章)?|这段(?:内容)?|诗(?:里|中)?)\s*)?(?:的)?\s*(?:[\p{L}\p{N}]{0,12}\s*)?(?:改|修改|调整|更新|换|加长|缩短|润色)/iu;

export function isWechatPageRetryText(text) {
  const normalized = String(text ?? '').trim();
  return Boolean(normalized && PAGE_RETRY_PATTERN.test(normalized));
}

export function isWechatPageEditText(text) {
  const normalized = String(text ?? '').trim();
  return Boolean(normalized && PAGE_EDIT_PATTERN.test(normalized));
}

export function isWechatContentEditFollowup(text) {
  const normalized = String(text ?? '').trim();
  return Boolean(normalized && PAGE_CONTENT_EDIT_PATTERN.test(normalized));
}

export function isWechatImmediateContextPageCreate(wechatIntent, text) {
  if (wechatIntent?.kind !== 'page.generate') return false;
  const normalized = String(text ?? '').trim();
  return Boolean(normalized && PAGE_IMMEDIATE_CREATE_PATTERN.test(normalized));
}

export function isWechatSessionPageContinuation(wechatIntent, text) {
  const normalized = String(text ?? '').trim();
  if (!normalized) return false;
  if (isWechatPageRetryText(normalized)) return true;
  if (isWechatImmediateContextPageCreate(wechatIntent, normalized)) return true;
  if (wechatIntent?.kind === 'page.generate' && isWechatPageEditText(normalized)) return true;
  if (wechatIntent?.kind === 'chat.general' && isWechatContentEditFollowup(normalized)) return true;
  return false;
}

export function expectsWechatHtmlArtifactDelivery(wechatIntent, text) {
  const normalized = String(text ?? '').trim();
  return (
    wechatIntent?.kind === 'page.generate'
    || isWechatSessionPageContinuation(wechatIntent, normalized)
  );
}