const GOofishDesktopBase = 'https://www.goofish.com/item';
const GOofishMobileBase = 'https://h5.m.goofish.com/item';

export function normalizeItemId(value = '') {
  const text = String(value || '').trim();
  if (!text) return '';
  const queryMatch = text.match(/[?&](?:id|itemId)=([0-9]+)/i);
  if (queryMatch) return queryMatch[1];
  const pathMatch = text.match(/(?:item|itemId)[=/]([0-9]+)/i);
  if (pathMatch) return pathMatch[1];
  const digits = text.match(/\b([0-9]{8,})\b/);
  return digits ? digits[1] : '';
}

export function buildItemLinks(itemOrId = {}) {
  const raw = typeof itemOrId === 'object' && itemOrId !== null ? itemOrId : { id: itemOrId };
  const id = normalizeItemId(raw.id || raw.itemId || raw.href || raw.url || raw.detailUrl || raw.originalHref || raw.shareUrl);
  const source = String(raw.href || raw.url || raw.detailUrl || raw.originalHref || raw.shareUrl || '').trim();
  let categoryId = String(raw.categoryId || '').trim();
  if (!categoryId && source) {
    const m = source.match(/[?&]categoryId=([^&#]+)/i);
    if (m) categoryId = decodeURIComponent(m[1]);
  }
  if (!id) {
    return {
      id: '',
      desktopUrl: source,
      mobileUrl: source,
      webUrl: source,
      primaryUrl: source,
      markdownUrl: source,
    };
  }
  const categoryQuery = categoryId ? `&categoryId=${encodeURIComponent(categoryId)}` : '';
  const desktopUrl = `${GOofishDesktopBase}?id=${encodeURIComponent(id)}${categoryQuery}`;
  const mobileUrl = `${GOofishMobileBase}?id=${encodeURIComponent(id)}`;
  return {
    id,
    desktopUrl,
    mobileUrl,
    webUrl: desktopUrl,
    primaryUrl: mobileUrl,
    markdownUrl: mobileUrl,
  };
}

export function enrichItemLinks(item = {}) {
  const links = buildItemLinks(item);
  if (!links.id && !links.primaryUrl) return item;
  return {
    ...item,
    id: item.id || links.id,
    href: links.primaryUrl || item.href || item.url || '',
    mobileHref: links.mobileUrl || item.mobileHref || '',
    webHref: links.desktopUrl || item.webHref || '',
    originalHref: item.originalHref || item.href || item.url || '',
  };
}

export function displayItemUrl(itemOrId = {}) {
  return buildItemLinks(itemOrId).primaryUrl || '';
}