const express = require('express');
const multer = require('multer');
const upload = multer();
const router = express.Router();
const uploadService = require('../services/uploadService');
const { getActiveUser, authMiddleware } = require('../middleware/auth');
const { validateFile } = require('../validators/upload.validator');
const { toFileDto, fileCreationErrorDto, fileCreationResultDto } = require('../dtos/file.dto');

router.post('/', authMiddleware, upload.single('file'), async (req, res) => {
  const validation = validateFile(req.file);
  if (!validation.valid) {
    return res.status(400).json(fileCreationErrorDto(validation.reason));
  }

  const user = await getActiveUser(req);
  const result = await uploadService.createUpload(user, req.file);
  if (!result) {
    return res.status(500).json(fileCreationErrorDto('Error processing upload'));
  }

  res.status(200).json(fileCreationResultDto(result.filename));
});

router.get('/', authMiddleware, async (req, res) => {
  const user = await getActiveUser(req);
  const uploads = await uploadService.getUserUploads(user);
  res.json(uploads.map(toFileDto));
});

router.delete('/:filename', authMiddleware, async (req, res) => {
  const user = await getActiveUser(req);
  const { filename } = req.params;

  try {
    await uploadService.deleteUpload(user, filename);
    res.sendStatus(200);
  } catch (err) {
    console.error(err);
    res.status(500).send('Error deleting upload');
  }
});

router.put('/:filename', authMiddleware, async (req, res) => {
  const user = await getActiveUser(req);
  const { filename } = req.params;
  const { newFilename } = req.body;

  if (!newFilename || typeof newFilename !== 'string') {
    return res.status(400).json({ message: 'New filename is required and must be a string' });
  }

  try {
    const success = await uploadService.renameUpload(user, filename, newFilename);
    if (!success) {
      return res.status(404).json({ message: 'File not found or not authorized' });
    }

    res.status(200).json({ message: 'File renamed successfully' });
  } catch (err) {
    console.error('Error renaming file:', err);
    res.status(500).json({ message: 'Internal server error' });
  }
});


module.exports = router;