import { Router } from 'express';

import { query } from '../db/pool.js';
import { asyncHandler } from '../utils/asyncHandler.js';

const router = Router();

/**
 * @openapi
 * /api/v1/health:
 *   get:
 *     summary: Health check
 *     description: Returns API and database connection status. Checks MariaDB connectivity.
 *     tags:
 *       - Health
 *     responses:
 *       200:
 *         description: API is healthy
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 status:
 *                   type: string
 *                   example: ok
 *                 service:
 *                   type: string
 *                   example: check-list-poc-api
 *                 database:
 *                   type: string
 *                   example: connected
 */
router.get(
  '/',
  asyncHandler(async (_req, res) => {
    console.log(`PUBLIC: GET /api/v1/health`);
    /*
     * The health endpoint checks the database on purpose instead of only proving
     * that Express can answer HTTP. In this project, the server is not useful if
     * MariaDB is unavailable, so health must include that dependency.
     */
    await query('SELECT 1 AS ok');

    res.json({
      status: 'ok',
      service: 'check-list-poc-api',
      database: 'connected'
    });
  })
);

export default router;