/**
 * Utility functions for generating unique identifiers
 */

const globalCrypto = typeof globalThis !== "undefined" ? globalThis.crypto : undefined;

export const generateUrid = (): string => {
  if (globalCrypto?.randomUUID) {
    return globalCrypto.randomUUID();
  }

  const template = "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx";
  return template.replace(/[xy]/g, char => {
    const randomNibble = Math.floor(Math.random() * 16);
    const value = char === "x" ? randomNibble : (randomNibble & 0x3) | 0x8;
    return value.toString(16);
  });
};

export const generateKey = (): string => {
  if (globalCrypto?.randomUUID) {
    return globalCrypto.randomUUID().replace(/-/g, "");
  }

  if (globalCrypto?.getRandomValues) {
    const [value] = globalCrypto.getRandomValues(new Uint32Array(1));
    return value.toString(16);
  }

  return Math.random().toString(16).slice(2);
};