import { createApp } from './app.js';
import { createEditQueue } from './queue/edit-queue.js';
import { processEditJob } from './queue/process-edit-job.js';
import { openDb, closeDb, pruneExpiredProposals, pruneIdempotencyKeys } from './db.js';
import { logger } from './logger.js';
import { initLiveReload } from './live-reload.js';

const PORT = parseInt(process.env.ORCHESTRATOR_PORT || '3001', 10);

export async function startServer() {
  // Initialize database
  openDb();
  logger.info({ event: 'db.opened' }, 'SQLite database opened');

  // Create queue and wire consumer
  const queue = createEditQueue();
  queue.startConsumer(processEditJob);

  // Periodic cleanup
  const cleanupInterval = setInterval(() => {
    pruneExpiredProposals();
    pruneIdempotencyKeys();
  }, 60_000);

  // Create and start HTTP server
  const app = createApp({ queue });
  const server = app.listen(PORT, () => {
    logger.info({ event: 'server.started', port: PORT }, `Orchestrator listening on port ${PORT}`);
  });

  // Optional websocket for browser reload on content writes
  initLiveReload(server);

  // Graceful shutdown
  let shuttingDown = false;
  async function shutdown(signal: string) {
    if (shuttingDown) return;
    shuttingDown = true;
    logger.info({ event: 'server.shutdown', signal }, `Received ${signal}, shutting down...`);

    clearInterval(cleanupInterval);

    // Stop accepting new connections
    server.close(() => {
      logger.info({ event: 'server.closed' }, 'HTTP server closed');
    });

    // Drain queue (finish current job)
    await queue.shutdown();

    // Close database
    closeDb();
    logger.info({ event: 'db.closed' }, 'Database closed');

    process.exit(0);
  }

  process.on('SIGTERM', () => shutdown('SIGTERM'));
  process.on('SIGINT', () => shutdown('SIGINT'));
}

startServer().catch(err => {
  logger.fatal({ error: (err as Error).message }, 'Failed to start server');
  process.exit(1);
});