import { setDebug } from "./debug";
import { LruMap } from "./lru";
const cache = new LruMap<string, unknown>(50);
setDebug("cache", cache);
function hashKeyParts(keyParts: string[]): string {
  const str = keyParts.join(":");
  let hash = 5381;
  for (let i = 0; i < str.length; i++) {
    hash = hash * 33 ^ str.charCodeAt(i);
  }

  // Convert to unsigned 32-bit and base36
  return (hash >>> 0).toString(36);
}
export function memo<T>(keyParts: string[], factory: () => T): T {
  const key = hashKeyParts(keyParts);
  if (!cache.has(key)) {
    cache.set(key, factory());
  }
  return cache.get(key) as T;
}