import { Router } from 'express';
import { checkDatabaseHealth, isDatabaseConfigured } from '../services/db.js';

export const healthRouter = Router();

function healthHandler(req, res) {
  res.status(200).json({
    ok: true,
    service: 'krow-query-api',
    version: process.env.SERVICE_VERSION || 'dev',
    requestId: req.requestId,
  });
}

healthRouter.get('/health', healthHandler);
healthRouter.get('/healthz', healthHandler);

healthRouter.get('/readyz', async (req, res) => {
  if (!isDatabaseConfigured()) {
    return res.status(503).json({
      ok: false,
      service: 'krow-query-api',
      status: 'DATABASE_NOT_CONFIGURED',
      requestId: req.requestId,
    });
  }

  try {
    const ok = await checkDatabaseHealth();
    return res.status(ok ? 200 : 503).json({
      ok,
      service: 'krow-query-api',
      status: ok ? 'READY' : 'DATABASE_UNAVAILABLE',
      requestId: req.requestId,
    });
  } catch (error) {
    return res.status(503).json({
      ok: false,
      service: 'krow-query-api',
      status: 'DATABASE_UNAVAILABLE',
      details: { message: error.message },
      requestId: req.requestId,
    });
  }
});