import { NextRequest, NextResponse } from 'next/server';
import { createDomainManager, validateDomainAccess } from '@/lib/domainManagement';

export async function GET(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { id } = await params;
    const universityId = request.headers.get('x-university-id');
    
    if (!universityId) {
      return NextResponse.json(
        { error: 'University context required' },
        { status: 400 }
      );
    }

    const hasAccess = await validateDomainAccess(request, id);
    if (!hasAccess) {
      return NextResponse.json(
        { error: 'Access denied' },
        { status: 403 }
      );
    }

    const domainManager = createDomainManager(universityId);
    const domain = await domainManager.getDomain(id);

    if (!domain) {
      return NextResponse.json(
        { error: 'Domain not found' },
        { status: 404 }
      );
    }

    return NextResponse.json({
      success: true,
      data: domain,
    });
  } catch (error) {
    console.error('Error fetching domain:', error);
    return NextResponse.json(
      { error: 'Failed to fetch domain' },
      { status: 500 }
    );
  }
}

export async function PATCH(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { id } = await params;
    const universityId = request.headers.get('x-university-id');
    
    if (!universityId) {
      return NextResponse.json(
        { error: 'University context required' },
        { status: 400 }
      );
    }

    const hasAccess = await validateDomainAccess(request, id);
    if (!hasAccess) {
      return NextResponse.json(
        { error: 'Access denied' },
        { status: 403 }
      );
    }

    const body = await request.json();
    const domainManager = createDomainManager(universityId);
    const updatedDomain = await domainManager.updateDomain(id, body);

    return NextResponse.json({
      success: true,
      data: updatedDomain,
      message: 'Domain updated successfully',
    });
  } catch (error) {
    console.error('Error updating domain:', error);
    return NextResponse.json(
      { error: error instanceof Error ? error.message : 'Failed to update domain' },
      { status: 500 }
    );
  }
}

export async function DELETE(
  request: NextRequest,
  { params }: { params: Promise<{ id: string }> }
) {
  try {
    const { id } = await params;
    const universityId = request.headers.get('x-university-id');
    
    if (!universityId) {
      return NextResponse.json(
        { error: 'University context required' },
        { status: 400 }
      );
    }

    const hasAccess = await validateDomainAccess(request, id);
    if (!hasAccess) {
      return NextResponse.json(
        { error: 'Access denied' },
        { status: 403 }
      );
    }

    const domainManager = createDomainManager(universityId);
    await domainManager.deleteDomain(id);

    return NextResponse.json({
      success: true,
      message: 'Domain deleted successfully',
    });
  } catch (error) {
    console.error('Error deleting domain:', error);
    return NextResponse.json(
      { error: error instanceof Error ? error.message : 'Failed to delete domain' },
      { status: 500 }
    );
  }
}