import { NextResponse } from 'next/server';
import pool from '@/lib/db';
import { RowDataPacket } from 'mysql2';
import { cookies } from 'next/headers';
import { jwtVerify } from 'jose';

interface MahasiswaProfile extends RowDataPacket {
  nim: string;
  nama: string;
  jk: 'Pria' | 'Wanita';
  agama: string;
  kabupaten: string;
  provinsi: string;
  jenis_pendaftaran: string;
  status_beasiswa: 'YA' | 'TIDAK';
  tahun_angkatan: string;
  ipk: number | null;
  prestasi: 'YA' | 'TIDAK';
  status_kuliah: string;
}

export async function GET(request: Request) {
  let connection;
  try {
    // Get token from cookies
    const cookieStore = await cookies();
    const token = cookieStore.get('token')?.value;
    
    if (!token) {
      return NextResponse.json(
        { error: 'Unauthorized' },
        { status: 401 }
      );
    }

    // Verify JWT token
    const { payload } = await jwtVerify(
      token,
      new TextEncoder().encode(process.env.JWT_SECRET || 'your-secret-key')
    );

    const nim = payload.nim as string;

    // Get connection from pool
    connection = await pool.getConnection();

    const query = `
      SELECT 
        m.nim,
        m.nama,
        m.jk,
        m.agama,
        m.kabupaten,
        m.provinsi,
        m.jenis_pendaftaran,
        m.status_beasiswa,
        m.tahun_angkatan,
        m.ipk,
        m.prestasi,
        s.status_kuliah
      FROM 
        mahasiswa m
      LEFT JOIN 
        status_mahasiswa s ON m.nim = s.nim
      WHERE 
        m.nim = ?
    `;

    const [rows] = await connection.query<MahasiswaProfile[]>(query, [nim]);
    
    if (rows.length === 0) {
      connection.release();
      return NextResponse.json(
        { error: 'Data mahasiswa tidak ditemukan' },
        { status: 404 }
      );
    }

    connection.release();
    return NextResponse.json(rows[0]);
  } catch (error) {
    if (connection) {
      connection.release();
    }
    console.error('Error fetching profile data:', error);
    return NextResponse.json(
      { error: 'Internal Server Error' },
      { status: 500 }
    );
  }
}