import express, { Request, Response, Router } from 'express';

export default (): Router => {
  const router = express.Router();

  /**
     * @swagger
     * /api/config:
     *   get:
     *     tags:
     *       - Public API
     *     summary: Get API configuration
     *     description: Returns public API configuration including Mapbox access token for geocoding
     *     responses:
     *       200:
     *         description: API configuration retrieved successfully
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/ApiConfig'
     *             examples:
     *               with_mapbox:
     *                 summary: Configuration with Mapbox token
     *                 value:
     *                   mapboxAccessToken: "pk.eyJ1IjoiZXhhbXBsZSIsImEiOiJhYmNkZWZnIn0.example"
     *                   hasMapbox: true
     *               without_mapbox:
     *                 summary: Configuration without Mapbox token
     *                 value:
     *                   mapboxAccessToken: null
     *                   hasMapbox: false
     *       500:
     *         description: Internal server error
     *         content:
     *           application/json:
     *             schema:
     *               $ref: '#/components/schemas/Error'
     */
  router.get('/', (req: Request, res: Response): void => {
    console.log('📡 API Config requested');
    const MAPBOX_ACCESS_TOKEN: string | undefined = process.env.MAPBOX_ACCESS_TOKEN || undefined;

    console.log('Mapbox token present:', !!MAPBOX_ACCESS_TOKEN);
    console.log('Mapbox token starts with pk:', MAPBOX_ACCESS_TOKEN?.startsWith('pk.'));

    res.json({
      // Mapbox tokens are designed to be public (they have domain restrictions)
      mapboxAccessToken: MAPBOX_ACCESS_TOKEN || null,
      hasMapbox: !!MAPBOX_ACCESS_TOKEN
      // SECURITY: Google Maps API key is kept server-side only
    });
  });

  return router;
};