/**
 * Documents Routes
 * Framework documentation endpoints
 */

const express = require('express');
const router = express.Router();

const documentsController = require('../controllers/documents.controller');
const { authenticateToken, requireRole, optionalAuth } = require('../middleware/auth.middleware');
const { validateRequired, validateObjectId, validateSlug } = require('../middleware/validation.middleware');
const { asyncHandler } = require('../middleware/error.middleware');

/**
 * Public routes (read-only)
 */

// GET /api/documents/search?q=query
router.get('/search',
  asyncHandler(documentsController.searchDocuments)
);

// GET /api/documents/archived (admin only)
router.get('/archived',
  authenticateToken,
  requireRole('admin'),
  asyncHandler(documentsController.listArchivedDocuments)
);

// GET /api/documents/drafts (admin only)
router.get('/drafts',
  authenticateToken,
  requireRole('admin'),
  asyncHandler(documentsController.listDraftDocuments)
);

// GET /api/documents
router.get('/', (req, res, next) => {
  // Redirect browser requests to API documentation
  const acceptsHtml = req.accepts('html');
  const acceptsJson = req.accepts('json');

  if (acceptsHtml && !acceptsJson) {
    return res.redirect(302, '/api-reference.html#documents');
  }

  next();
}, asyncHandler(documentsController.listDocuments));

// GET /api/documents/:identifier/translations (public, visibility-filtered)
router.get('/:identifier/translations',
  optionalAuth,
  asyncHandler(documentsController.getTranslations)
);

// GET /api/documents/:identifier (ID or slug, visibility-filtered)
router.get('/:identifier',
  optionalAuth,
  asyncHandler(documentsController.getDocument)
);

/**
 * Admin routes (protected)
 */

// POST /api/documents
router.post('/',
  authenticateToken,
  requireRole('admin'),
  validateRequired(['title', 'slug', 'quadrant', 'content_markdown']),
  validateSlug,
  asyncHandler(documentsController.createDocument)
);

// PUT /api/documents/:id
router.put('/:id',
  authenticateToken,
  requireRole('admin'),
  validateObjectId('id'),
  asyncHandler(documentsController.updateDocument)
);

// DELETE /api/documents/:id
router.delete('/:id',
  authenticateToken,
  requireRole('admin'),
  validateObjectId('id'),
  asyncHandler(documentsController.deleteDocument)
);

// POST /api/documents/:id/publish (admin only)
// SECURITY: Explicit publish workflow with validation
router.post('/:id/publish',
  authenticateToken,
  requireRole('admin'),
  validateObjectId('id'),
  validateRequired(['category']),
  asyncHandler(documentsController.publishDocument)
);

// POST /api/documents/:id/unpublish (admin only)
router.post('/:id/unpublish',
  authenticateToken,
  requireRole('admin'),
  validateObjectId('id'),
  asyncHandler(documentsController.unpublishDocument)
);

// POST /api/documents/:id/translate (admin only)
// Translate document to target language using DeepL
router.post('/:id/translate',
  authenticateToken,
  requireRole('admin'),
  validateObjectId('id'),
  validateRequired(['targetLang']),
  asyncHandler(documentsController.translateDocument)
);

// DELETE /api/documents/:id/translations/:lang (admin only)
// Delete a translation
router.delete('/:id/translations/:lang',
  authenticateToken,
  requireRole('admin'),
  validateObjectId('id'),
  asyncHandler(documentsController.deleteTranslation)
);

module.exports = router;