/**
 * SimpleNote Web - Folders Routes
 * CRUD + tree for folders
 */

import { Router } from 'express';
import { authMiddleware } from '../middleware/auth.js';
import { getFolderService } from '../services/folderService.js';
import { NotFoundError, ValidationError } from '../utils/errors.js';

const router = Router();
router.use(authMiddleware);

// GET /folders?project=X&parentId=Y - List folders (project is optional, matches documents API)
router.get('/', async (req, res) => {
  try {
    const { project, parentId } = req.query;
    const folderService = getFolderService();
    const folders = await folderService.getFolders(project || null, parentId || null);
    res.json({ folders });
  } catch (err) {
    if (err instanceof ValidationError) {
      return res.status(400).json({ error: err.message, code: err.code });
    }
    if (err instanceof NotFoundError) {
      return res.status(404).json({ error: err.message, code: err.code });
    }
    console.error('Error listing folders:', err);
    res.status(500).json({ error: 'Internal server error', code: 'INTERNAL_ERROR' });
  }
});

// POST /folders - Create folder
router.post('/', async (req, res) => {
  try {
    const { name, projectId, parentId } = req.body;
    if (!name) {
      throw new ValidationError('name is required');
    }
    if (!projectId) {
      throw new ValidationError('projectId is required');
    }
    const folderService = getFolderService();
    const folder = await folderService.createFolder({ name, projectId, parentId: parentId || null });
    res.status(201).json(folder);
  } catch (err) {
    if (err instanceof ValidationError || err instanceof NotFoundError) {
      const status = err instanceof ValidationError ? 400 : 404;
      return res.status(status).json({ error: err.message, code: err.code });
    }
    console.error('Error creating folder:', err);
    res.status(500).json({ error: 'Internal server error', code: 'INTERNAL_ERROR' });
  }
});

// GET /folders/:id - Get folder contents
router.get('/:id', async (req, res) => {
  try {
    const folderService = getFolderService();
    const folder = await folderService.getFolder(req.params.id);
    res.json(folder);
  } catch (err) {
    if (err instanceof NotFoundError) {
      return res.status(404).json({ error: err.message, code: err.code });
    }
    console.error('Error getting folder:', err);
    res.status(500).json({ error: 'Internal server error', code: 'INTERNAL_ERROR' });
  }
});

// PUT /folders/:id - Update folder
router.put('/:id', async (req, res) => {
  try {
    const { name } = req.body;
    const folderService = getFolderService();
    const folder = await folderService.updateFolder(req.params.id, { name });
    res.json(folder);
  } catch (err) {
    if (err instanceof NotFoundError) {
      return res.status(404).json({ error: err.message, code: err.code });
    }
    if (err instanceof ValidationError) {
      return res.status(400).json({ error: err.message, code: err.code });
    }
    console.error('Error updating folder:', err);
    res.status(500).json({ error: 'Internal server error', code: 'INTERNAL_ERROR' });
  }
});

// DELETE /folders/:id - Delete folder
router.delete('/:id', async (req, res) => {
  try {
    const folderService = getFolderService();
    const result = await folderService.deleteFolder(req.params.id);
    res.json(result);
  } catch (err) {
    if (err instanceof NotFoundError) {
      return res.status(404).json({ error: err.message, code: err.code });
    }
    console.error('Error deleting folder:', err);
    res.status(500).json({ error: 'Internal server error', code: 'INTERNAL_ERROR' });
  }
});

// GET /folders/:id/documents - List documents in folder
router.get('/:id/documents', async (req, res) => {
  try {
    const folderService = getFolderService();
    const result = await folderService.getFolderDocuments(req.params.id);
    res.json(result);
  } catch (err) {
    if (err instanceof NotFoundError) {
      return res.status(404).json({ error: err.message, code: err.code });
    }
    console.error('Error listing folder documents:', err);
    res.status(500).json({ error: 'Internal server error', code: 'INTERNAL_ERROR' });
  }
});

// GET /folders/:id/tree - Get full folder tree
router.get('/:id/tree', async (req, res) => {
  try {
    const folderService = getFolderService();
    const tree = await folderService.getFolderTree(req.params.id);
    res.json(tree);
  } catch (err) {
    if (err instanceof NotFoundError) {
      return res.status(404).json({ error: err.message, code: err.code });
    }
    console.error('Error getting folder tree:', err);
    res.status(500).json({ error: 'Internal server error', code: 'INTERNAL_ERROR' });
  }
});

export default router;