const { Router } = require('express');
const fetch = require('node-fetch');
const { getEnv, SERVICES, PORTS } = require('@nexusai/shared');

const router = Router();

const SERVICES_MAP = [
  { key: 'inference',     label: 'Inference',     url: `${getEnv('INFERENCE_SERVICE_URL', SERVICES.INFERENCE_URL)}/health` },
  { key: 'memory',        label: 'Memory',        url: `${getEnv('MEMORY_SERVICE_URL',    SERVICES.MEMORY_URL)}/health` },
  { key: 'embedding',     label: 'Embedding',     url: `${getEnv('EMBEDDING_SERVICE_URL', SERVICES.EMBEDDING_URL)}/health` },
  { key: 'orchestration', label: 'Orchestration', url: `http://localhost:${getEnv('PORT', PORTS.ORCHESTRATION)}/health` },
];

router.get('/', async (req, res) => {
  const results = await Promise.all(
    SERVICES_MAP.map(async ({ key, label, url }) => {
      const start = Date.now();
      try {
        const r = await fetch(url, { signal: AbortSignal.timeout(3000) });
        const data = await r.json();
        return { key, label, status: 'healthy', latency: Date.now() - start, detail: data };
      } catch (err) {
        return { key, label, status: 'unreachable', latency: Date.now() - start, detail: null };
      }
    })
  );
  res.json(results);
});

module.exports = router;