const express = require('express');
const router = express.Router();
const multer = require('multer');
const orderController = require('../controllers/order-controller');
const { authenticateApiToken } = require('../middleware/auth');

// Multer konfigurieren für Datei-Uploads (temporär im Speicher)
const upload = multer({
  storage: multer.memoryStorage(),
  limits: {
    fileSize: 10 * 1024 * 1024, // 10MB max
  },
  fileFilter: (req, file, cb) => {
    // Erlaubte Dateitypen
    const allowedTypes = ['image/png', 'image/jpeg', 'image/webp', 'image/svg+xml', 'application/pdf'];
    const allowedExts = ['.png', '.jpg', '.jpeg', '.webp', '.svg', '.pdf'];

    const ext = file.originalname.toLowerCase().substring(file.originalname.lastIndexOf('.'));

    if (allowedTypes.includes(file.mimetype) || allowedExts.includes(ext)) {
      cb(null, true);
    } else {
      cb(new Error('Nur PNG, JPG, WEBP, SVG und PDF Dateien sind erlaubt'), false);
    }
  }
});

/**
 * POST /api/order/finalize
 * Finalize order by copying cached previews to output directory
 *
 * Request body:
 * {
 *   sessionId: string,
 *   orderNumber: string
 * }
 *
 * Response:
 * {
 *   orderNumber: string,
 *   outputPath: string,
 *   files: string[],
 *   timestamp: string
 * }
 */
router.post('/finalize', authenticateApiToken, orderController.finalizeOrder);

/**
 * POST /api/order/generate
 * Generate order from scratch without using cache
 *
 * Request body:
 * {
 *   orderNumber: string,
 *   letters: [
 *     {
 *       text: string,
 *       format: 'a4' | 'a6p' | 'a6l' | 'c6' | 'din_lang',
 *       font: 'tilda' | 'alva' | 'ellie',
 *       type?: 'letter' | 'envelope',
 *       envelopeType?: 'recipient' | 'custom',
 *       placeholders?: { [key: string]: string }
 *     }
 *   ]
 * }
 *
 * Response:
 * {
 *   orderNumber: string,
 *   outputPath: string,
 *   files: string[],
 *   timestamp: string
 * }
 */
router.post('/generate', authenticateApiToken, orderController.generateOrder);

/**
 * POST /api/order/motif
 * Upload a motif image for an order
 *
 * Request: multipart/form-data
 * - motif: file (PNG, JPG, WEBP, SVG, PDF)
 * - orderNumber: string
 *
 * Response:
 * {
 *   success: boolean,
 *   filename: string,
 *   path: string
 * }
 */
router.post('/motif', authenticateApiToken, upload.single('motif'), orderController.uploadMotif);

module.exports = router;