import { argon2id } from 'hash-wasm';
import type { HashParams } from '@akrababul/shared';

export type WorkerRequest = { id: number; keyText: string; salt: string; params: HashParams };
export type WorkerResponse = { id: number; hash: string } | { id: number; error: string };

// tsconfig DOM lib'i ile çakışmamak için WebWorker lib'i eklenmez; worker kapsamı dar tiplenir.
const ctx = self as unknown as { onmessage: ((e: MessageEvent<WorkerRequest>) => void) | null; postMessage(m: WorkerResponse): void };
const enc = new TextEncoder();

ctx.onmessage = async (e: MessageEvent<WorkerRequest>) => {
  const { id, keyText, salt, params } = e.data;
  try {
    const hash = await argon2id({
      password: keyText, salt: enc.encode(salt),
      memorySize: params.memorySize, iterations: params.iterations, parallelism: params.parallelism, hashLength: params.hashLength,
      outputType: 'hex',
    });
    ctx.postMessage({ id, hash: hash as string });
  } catch (err) {
    ctx.postMessage({ id, error: err instanceof Error ? err.message : String(err) });
  }
};