import { expect, tap } from '@git.zone/tstest/tapbundle';
import * as smartdb from '../ts/index.js';
import * as fs from 'fs';
import * as net from 'net';
import * as path from 'path';
import * as os from 'os';

// ---------------------------------------------------------------------------
// Test: Stale socket cleanup on startup
// Covers: LocalSmartDb.cleanStaleSockets(), isSocketAlive()
// ---------------------------------------------------------------------------

function makeTmpDir(): string {
  return fs.mkdtempSync(path.join(os.tmpdir(), 'smartdb-socket-test-'));
}

function cleanTmpDir(dir: string): void {
  if (fs.existsSync(dir)) {
    fs.rmSync(dir, { recursive: true, force: true });
  }
}

// ============================================================================
// Stale socket cleanup: active sockets are preserved
// ============================================================================

tap.test('stale-sockets: does not remove active sockets', async () => {
  const tmpDir = makeTmpDir();
  const activeSocketPath = path.join(os.tmpdir(), `smartdb-active-${Date.now()}.sock`);

  // Create an active socket (server still listening)
  const activeServer = net.createServer();
  await new Promise<void>((resolve) => activeServer.listen(activeSocketPath, resolve));

  expect(fs.existsSync(activeSocketPath)).toBeTrue();

  // Start LocalSmartDb — should NOT remove the active socket
  const localDb = new smartdb.LocalSmartDb({ folderPath: tmpDir });
  await localDb.start();

  expect(fs.existsSync(activeSocketPath)).toBeTrue();

  // Cleanup
  await localDb.stop();
  await new Promise<void>((resolve) => activeServer.close(() => resolve()));
  try { fs.unlinkSync(activeSocketPath); } catch {}
  cleanTmpDir(tmpDir);
});

// ============================================================================
// Stale socket cleanup: startup works with no stale sockets
// ============================================================================

tap.test('stale-sockets: startup works cleanly with no stale sockets', async () => {
  const tmpDir = makeTmpDir();
  const localDb = new smartdb.LocalSmartDb({ folderPath: tmpDir });
  const info = await localDb.start();
  expect(localDb.running).toBeTrue();
  expect(info.socketPath).toBeTruthy();
  await localDb.stop();
  cleanTmpDir(tmpDir);
});

// ============================================================================
// Stale socket cleanup: the socket file for the current instance is cleaned on stop
// ============================================================================

tap.test('stale-sockets: own socket file is removed on stop', async () => {
  const tmpDir = makeTmpDir();
  const localDb = new smartdb.LocalSmartDb({ folderPath: tmpDir });
  const info = await localDb.start();

  expect(fs.existsSync(info.socketPath)).toBeTrue();

  await localDb.stop();

  // Socket file should be gone after graceful stop
  expect(fs.existsSync(info.socketPath)).toBeFalse();
  cleanTmpDir(tmpDir);
});

export default tap.start();