const express = require("express");
const Course = require("../models/Course");

const router = express.Router();

router.get("/", async (req, res) => {
    try {
      const filter = {};
  
      if (req.query.department) filter.department = req.query.department;
      if (req.query.program) filter.program = req.query.program;
      if (req.query.semester) filter.semester = Number(req.query.semester); // Convert to number if needed
      if (req.query.scheme) filter.scheme = req.query.scheme;
  
      const courses = await Course.find(filter);
      res.json(courses);
    } catch (error) {
      console.error("Error fetching courses:", error);
      res.status(500).json({ error: "Failed to fetch courses" });
    }
  });
  

// Get course by ID
router.get("/:id", async (req, res) => {
  try {
    const course = await Course.findOne({ courseId: req.params.id });
    if (!course) {
      return res.status(404).json({ error: "Course not found" });
    }
    res.json(course);
  } catch (error) {
    console.error("Error fetching course:", error);
    res.status(500).json({ error: "Failed to fetch course" });
  }
});

module.exports = router;