/**
 * sh-mcp-ops entrypoint.
 *
 * Builds the app and starts listening. This is the ONLY place a listener is
 * created — importing any module above is side-effect free (build-plan §2.1).
 *
 * A `handler` placeholder is exported for a future Lambda adapter, but this PR
 * does NOT depend on the AWS Lambda runtime (build-plan §2.2).
 */

import { buildOpsApp } from './app.js';

export { buildOpsApp } from './app.js';

async function main(): Promise<void> {
  const { app, config } = await buildOpsApp();
  app.listen(config.port, () => {
    console.log(
      JSON.stringify({
        msg: 'sh-mcp-ops listening',
        env: config.env,
        port: config.port,
        endpoints: ['/mcp', '/openapi.json', 'POST /tools/:name', '/healthz'],
      }),
    );
  });
}

/**
 * Placeholder Lambda handler shape for a future phase. Intentionally throws —
 * the HTTP server (`main`) is the supported runtime in Phase 1.
 */
export function handler(): never {
  throw new Error('Lambda handler is not implemented in Phase 1; run the HTTP server.');
}

// Start only when executed directly (not when imported by tests).
const invokedDirectly =
  process.argv[1] !== undefined && import.meta.url === `file://${process.argv[1]}`;
if (invokedDirectly) {
  main().catch((err: unknown) => {
    console.error('Failed to start sh-mcp-ops:', err);
    process.exit(1);
  });
}