const express = require('express');
const router = express.Router();
const subjectController = require('../controllers/subjectController');

/**
 * Subject Routes
 */

// GET /api/subjects - Get all subjects with pagination
router.get('/', subjectController.getAllSubjects);

// GET /api/subjects/active - Get all active subjects
router.get('/active', subjectController.getActiveSubjects);

// GET /api/subjects/datatypes/schema - Get subject datatypes
router.get('/datatypes/schema', subjectController.getSubjectDatatypes);

// GET /api/subjects/code/:code - Get subject by code
router.get('/code/:code', subjectController.getSubjectByCode);

// GET /api/subjects/:id - Get subject by ID
router.get('/:id', subjectController.getSubjectById);

// GET /api/subjects/:id/chapters - Get chapters by subject
router.get('/:id/chapters', subjectController.getChaptersBySubject);

// POST /api/subjects - Create new subject
router.post('/', subjectController.createSubject);

// PUT /api/subjects/:id - Update subject
router.put('/:id', subjectController.updateSubject);

// DELETE /api/subjects/:id - Delete subject
router.delete('/:id', subjectController.deleteSubject);

// ============ Nested Chapter Routes ============
// POST /api/subjects/:subjectId/chapters - Add chapter to subject
router.post('/:subjectId/chapters', subjectController.addChapterToSubject);

// DELETE /api/subjects/:subjectId/chapters/:chapterId - Remove chapter from subject
router.delete('/:subjectId/chapters/:chapterId', subjectController.removeChapterFromSubject);

module.exports = router;