/**
 * System API Routes (Stub)
 *
 * The full system routes depend on SyncOrchestrator which was moved to _deprecated.
 * This stub provides empty routers to maintain backward compatibility.
 *
 * Full implementation available at: src/_deprecated/system/routes/index.ts
 */

import { Router, Request, Response } from 'express';
import { Pool } from 'pg';
import { MetricsService } from '../services';

export function createSystemRouter(_pool: Pool): Router {
  const router = Router();

  // Stub - full sync/dlq/integrity/fix/alerts routes moved to _deprecated
  router.get('/status', (_req: Request, res: Response) => {
    res.json({
      message: 'System routes temporarily disabled - see _deprecated/system/routes',
      status: 'stub',
    });
  });

  return router;
}

export function createPrometheusRouter(pool: Pool): Router {
  const router = Router();
  const metrics = new MetricsService(pool);

  /**
   * GET /metrics
   * Prometheus-compatible metrics endpoint
   */
  router.get('/', async (_req: Request, res: Response) => {
    try {
      const prometheusOutput = await metrics.getPrometheusMetrics();
      res.set('Content-Type', 'text/plain; version=0.0.4');
      res.send(prometheusOutput);
    } catch (error) {
      console.error('[Prometheus] Metrics error:', error);
      res.status(500).send('# Error generating metrics');
    }
  });

  return router;
}