// Utility functions shared across services

export function delay(ms: number): Promise<void> {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

export function formatBytes(bytes: number): string {
  if (bytes === 0) return "0 Bytes";
  const k = 1024;
  const sizes = ["Bytes", "KB", "MB", "GB"];
  const i = Math.floor(Math.log(bytes) / Math.log(k));
  return Math.round((bytes / Math.pow(k, i)) * 100) / 100 + " " + sizes[i];
}

export function generateId(): string {
  return `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
}

export function isValidUrl(url: string): boolean {
  try {
    new URL(url);
    return true;
  } catch {
    return false;
  }
}

export function sanitizeString(str: string): string {
  return str.replace(/[<>]/g, "").trim().substring(0);
}

export interface PaginationParams {
  page: number;
  limit: number;
}

export interface PaginatedResponse<T> {
  data: T[];
  total: number;
  page: number;
  limit: number;
  pages: number;
}

export function calculatePagination(
  total: number,
  page: number,
  limit: number,
): PaginatedResponse<never> {
  return {
    data: [],
    total,
    page,
    limit,
    pages: Math.ceil(total / limit),
  };
}

export function getOffset(page: number, limit: number): number {
  return (page - 1) * limit;
}