import { NextRequest, NextResponse } from 'next/server';
import { jwtVerify } from 'jose';
import { prisma } from '@/lib/prisma';

const JWT_SECRET = new TextEncoder().encode(
  process.env.JWT_SECRET || 'your-secret-key-at-least-32-chars-long'
);

export async function PATCH(request: NextRequest) {
  const token = request.cookies.get('token')?.value;

  if (!token) {
    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
  }

  try {
    const { payload } = await jwtVerify(token, JWT_SECRET);
    const userId = payload.userId as string;
    const body = await request.json();

    const { accentColor } = body;

    if (accentColor !== undefined && typeof accentColor !== 'string') {
      return NextResponse.json({ error: 'Invalid accentColor' }, { status: 400 });
    }

    const updateData: { accentColor?: string } = {};

    if (accentColor !== undefined) {
      updateData.accentColor = accentColor;
    }

    const updatedUser = await prisma.user.update({
      where: { id: userId },
      data: updateData,
      select: {
        id: true,
        username: true,
        accentColor: true,
      },
    });

    return NextResponse.json(updatedUser, { status: 200 });
  } catch (error) {
    console.error('Update user settings error:', error);
    return NextResponse.json({ error: 'Internal server error' }, { status: 500 });
  }
}