const RAW_API_BASE = String(import.meta.env.VITE_API_BASE || 'http://localhost:8000')
  .trim()
  .replace(/\/$/, '');

export const RESOURCE_BASE = RAW_API_BASE.replace(/\/api\/?$/i, '').replace(/\/$/, '');

export const isAbsoluteLikeUrl = (url: string): boolean => (
  /^(https?:)?\/\//i.test(url) || /^(blob|data):/i.test(url)
);

export const isBlobUrl = (url?: string | null): boolean => !!url && /^blob:/i.test(url.trim());

export const apiUrl = (url?: string | null): string => {
  if (!url) return '';
  const value = String(url).trim();
  if (!value) return '';
  if (isAbsoluteLikeUrl(value)) return value;

  if (!RESOURCE_BASE) {
    return value.startsWith('/') ? value : `/${value}`;
  }
  return `${RESOURCE_BASE}${value.startsWith('/') ? value : `/${value}`}`;
};

export const isUrlExpired = (url?: string | null): boolean => {
  if (!url || isBlobUrl(url)) return false;

  try {
    const parsed = new URL(apiUrl(url), window.location.origin);
    const expireValue =
      parsed.searchParams.get('exp') ||
      parsed.searchParams.get('expires') ||
      parsed.searchParams.get('expire') ||
      parsed.searchParams.get('expires_at') ||
      parsed.searchParams.get('x-expires');

    if (!expireValue) return false;

    const expireNumber = Number(expireValue);
    if (!Number.isFinite(expireNumber)) return false;

    const expireMs = expireNumber > 10_000_000_000 ? expireNumber : expireNumber * 1000;
    return Date.now() >= expireMs;
  } catch {
    return false;
  }
};