import { NextResponse } from 'next/server';
import pool from '@/lib/db';

export async function GET(request: Request) {
  try {
    const { searchParams } = new URL(request.url);
    const jenisPrestasi = searchParams.get('jenisPrestasi');

    const query = `
      SELECT 
        m.tahun_angkatan,
        COUNT(m.nim) AS total_mahasiswa_prestasi,
        ROUND(AVG(m.ipk), 2) AS rata_rata_ipk
      FROM 
        mahasiswa m
      JOIN 
        prestasi_mahasiswa s ON m.nim = s.nim
      WHERE
        s.jenis_prestasi = ?
      GROUP BY 
        m.tahun_angkatan
      ORDER BY 
        m.tahun_angkatan ASC
    `;

    const [rows] = await pool.query(query, [jenisPrestasi]);
    return NextResponse.json(rows);
  } catch (error) {
    console.error('Error fetching data:', error);
    return NextResponse.json(
      { error: 'Internal Server Error' },
      { status: 500 }
    );
  }
}