import { NextRequest, NextResponse } from 'next/server';
import fs from 'fs/promises';
import path from 'path';

const USERS_FILE = path.join(process.cwd(), 'data/users.json');

interface User {
  id: string;
  username: string;
  token: string;
}

async function readUsers(): Promise<User[]> {
  try {
    const data = await fs.readFile(USERS_FILE, 'utf-8');
    return JSON.parse(data);
  } catch {
    return [];
  }
}

export async function GET(request: NextRequest) {
  try {
    const token = request.cookies.get('auth_token')?.value;
    
    if (!token) {
      return NextResponse.json({ user: null });
    }
    
    const users = await readUsers();
    const user = users.find(u => u.token === token);
    
    if (!user) {
      return NextResponse.json({ user: null });
    }
    
    return NextResponse.json({ user: { username: user.username } });
  } catch (error) {
    console.error('Get user error:', error);
    return NextResponse.json({ user: null });
  }
}

export async function DELETE(request: NextRequest) {
  const response = NextResponse.json({ success: true });
  response.cookies.delete('auth_token');
  return response;
}