/** Summarize a URL for display in tool pages. */
export function summarizeUrl(value: string): string {
  try {
    const url = new URL(value);
    const lastSegment = url.pathname.split("/").filter(Boolean).pop();
    return lastSegment ? `${url.host}/.../${lastSegment}` : url.host;
  } catch {
    return value.length > 72 ? `${value.slice(0, 34)}...${value.slice(-28)}` : value;
  }
}

/** Format a byte count to human-readable file size. */
export function formatFileSize(bytes: number): string {
  if (!Number.isFinite(bytes) || bytes <= 0) return "0 KB";
  if (bytes >= 1024 * 1024) return `${(bytes / 1024 / 1024).toFixed(2)} MB`;
  return `${(bytes / 1024).toFixed(1)} KB`;
}

/** Read a File as a data URL string via FileReader. */
export function fileToDataUrl(file: File): Promise<string> {
  return new Promise<string>((resolve, reject) => {
    const reader = new FileReader();
    reader.onload = () => resolve(String(reader.result || ""));
    reader.onerror = () => reject(new Error("读取素材失败"));
    reader.readAsDataURL(file);
  });
}

/** Return a Promise that resolves after the given milliseconds. */
export function wait(ms: number): Promise<void> {
  return new Promise((resolve) => window.setTimeout(resolve, ms));
}