import assert from "node:assert/strict";
import test from "node:test";

import {
  computeBinaryHash,
  decryptBytes,
  encryptBytes,
  generateVaultKey,
  mergeTextRevisions
} from "../../packages/sync-engine/src";

test("encryptBytes round-trips binary payloads", async () => {
  const vaultKey = await generateVaultKey("test-key");
  const original = new Uint8Array([1, 2, 3, 4, 5]).buffer;

  const encrypted = await encryptBytes(original, vaultKey);
  const decrypted = await decryptBytes(encrypted, vaultKey);

  assert.deepEqual([...new Uint8Array(decrypted)], [1, 2, 3, 4, 5]);
});

test("computeBinaryHash is stable for identical binary payloads", async () => {
  const first = await computeBinaryHash(new Uint8Array([9, 8, 7, 6]).buffer);
  const second = await computeBinaryHash(new Uint8Array([9, 8, 7, 6]).buffer);

  assert.equal(first, second);
});

test("mergeTextRevisions reports conflicts when both sides diverge", () => {
  const result = mergeTextRevisions({
    base: "alpha",
    local: "alpha local",
    remote: "alpha remote"
  });

  assert.equal(result.status, "conflict");
  assert.match(result.content, /<<<<<<< LOCAL/);
  assert.match(result.content, />>>>>>> REMOTE/);
});