export const RandomString = (
  length: number,
  type: "uppercase" | "lowercase" | null = null
): string => {
  let chars: string;
  switch (type) {
    case "uppercase":
      chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
      break;
    case "lowercase":
      chars = "abcdefghijklmnopqrstuvwxyz";
      break;
    default:
      chars = "aAbBcCdDeEfFgGhHiIjJkKlMnNoOpPqQrRsStTuUvVwWxXyYzZ";
  }

  let result = "";
  for (let i = 0; i < length; i++) {
    result += chars.charAt(Math.floor(Math.random() * chars.length));
  }
  return result;
};

export const RandomNum = (length: number): string => {
  const digits = "0123456789";
  let result = "";
  for (let i = 0; i < length; i++) {
    result += digits.charAt(Math.floor(Math.random() * digits.length));
  }
  return result;
};

export const AlphaNum = (length: number): string => {
  const chars = "aAbBcCdDeEfFgGhHiIjJkKlMnNoOpPqQrRsStTuUvVwWxXyYzZ0123456789";
  let result = "";
  for (let i = 0; i < length; i++) {
    result += chars.charAt(Math.floor(Math.random() * chars.length));
  }
  return result;
};

export const APIKEY = (length: number, separator: string): string => {
  const chars = "ABCDEFGlaHgIhJKLjMNwOPqQRsSTcUVWnXYZm012u34f56789";
  let result = "";
  for (let i = 0; i < length; i++) {
    result += chars.charAt(Math.floor(Math.random() * chars.length));
  }
  return result.match(/.{1,4}/g)?.join(separator) ?? "";
};

export const UUID = (): string => {
  const segments = [8, 4, 4, 4, 12];
  return segments.map((segment) => RandomString(segment, null)).join("-");
};