export function getH3Base() {
  if (typeof window !== 'undefined' && window.__H3_BASE__ !== undefined) {
    return window.__H3_BASE__;
  }
  return '';
}

export function getToken() {
  if (typeof window === 'undefined') return '';
  return localStorage.getItem('h3_console_token') || '';
}

export function setToken(token) {
  if (typeof window === 'undefined') return;
  if (!token) {
    localStorage.removeItem('h3_console_token');
  } else {
    localStorage.setItem('h3_console_token', token.trim());
  }
}

export function formatTimeAgo(ts) {
  if (!ts) return '—';
  const now = Date.now() / 1000;
  const diff = Math.max(0, Math.round(now - ts));
  if (diff < 60) return `${diff}秒前`;
  if (diff < 3600) return `${Math.round(diff / 60)}分钟前`;
  if (diff < 86400) return `${Math.round(diff / 3600)}小时前`;
  return `${Math.round(diff / 86400)}天前`;
}

export function formatDateTime(ts) {
  if (!ts) return '—';
  return new Date(ts * 1000).toLocaleString('zh-CN', {
    hour12: false,
    year: 'numeric',
    month: '2-digit',
    day: '2-digit',
    hour: '2-digit',
    minute: '2-digit',
    second: '2-digit',
  });
}

export function formatBytes(bytes) {
  if (!bytes || bytes <= 0) return '0 B';
  const units = ['B', 'KB', 'MB', 'GB'];
  const i = Math.floor(Math.log(bytes) / Math.log(1024));
  return `${(bytes / Math.pow(1024, i)).toFixed(1)} ${units[i]}`;
}

export function filenameFromUrl(u) {
  if (!u) return '';
  try {
    const base = decodeURIComponent(u.split('/').pop().split('?')[0]);
    const m = base.match(/^[0-9a-f]{16}__(.+)$/);
    return m ? m[1] : base;
  } catch (e) {
    return u;
  }
}

// 上传返回的 URL 是写死内网 IP 的绝对地址（H3_CONSOLE_PUBLIC_BASE，raylight 要拉取，存库的值不能改），
// 别的网络打开页面时浏览器连不上。展示时把本机上传的文件（{16位hex}__ 前缀）改成当前页面同源路径；
// 外部图床 URL 原样返回。绝不改 req 里存的 URL。
export function localAsset(u) {
  const m = u && u.match(/\/assets\/([0-9a-f]{16}__[^/?#]*)$/);
  return m ? getH3Base() + '/assets/' + m[1] : u;
}

export function thumbUrl(u) {
  if (!u) return u;
  u = localAsset(u);
  const i = u.indexOf('/assets/');
  if (i === -1) return u;
  return u.slice(0, i) + '/thumbs/' + u.slice(i + '/assets/'.length);
}

export function h3FileUrl(path) {
  if (!path) return '';
  const token = getToken();
  return token ? `${path}${path.includes('?') ? '&' : '?'}token=${encodeURIComponent(token)}` : path;
}

export function getJobKind(req = {}) {
  if (req.first_frame_url || req.last_frame_url) return { key: 'fl2va', label: '首尾帧' };
  if ((req.reference_image_urls || []).length || (req.reference_video_urls || []).length || (req.reference_audio_urls || []).length) {
    return { key: 'ref2va', label: '参考图' };
  }
  return { key: 'text', label: '文生' };
}