import { randomBytes } from "node:crypto";

const ALPHABET = "0123456789abcdefghijklmnopqrstuvwxyz";

function base36(bytes: Buffer): string {
  let out = "";
  for (const b of bytes) out += ALPHABET[b % 36];
  return out;
}

/** Prefixed, URL-safe, 24-char random id: `cnv_k3j9...`. */
export function newId(prefix: string): string {
  return `${prefix}_${base36(randomBytes(20))}`;
}

export const ids = {
  conversation: () => newId("cnv"),
  message: () => newId("msg"),
  attachment: () => newId("att"),
  folder: () => newId("fld"),
  tag: () => newId("tag"),
  connection: () => newId("pcn"),
  usage: () => newId("usg"),
  preset: () => newId("pst"),
  prompt: () => newId("prm"),
  arena: () => newId("arn"),
  arenaResponse: () => newId("arr"),
  share: () => base36(randomBytes(16)),
  audit: () => newId("aud"),
  sync: () => newId("syn"),
  request: () => newId("req"),
};