import { NextResponse } from 'next/server';
import { getServerSession } from 'next-auth';
import { authOptions } from "@/app/api/auth/options";
import { NotificationRegistry } from '@/lib/services/notifications/notification-registry';
import { logger } from '@/lib/logger';

export async function POST(request: Request) {
  try {
    const session = await getServerSession(authOptions);
    if (!session?.user?.id) {
      return NextResponse.json({ error: "Not authenticated" }, { status: 401 });
    }

    const body = await request.json();
    const { source, count, items } = body;

    // Validate request
    if (!source || typeof count !== 'number' || count < 0) {
      return NextResponse.json(
        { error: "Invalid request: source (string) and count (number >= 0) required" },
        { status: 400 }
      );
    }

    // Validate source
    const validSources = ['email', 'rocketchat', 'leantime', 'calendar'];
    if (!validSources.includes(source)) {
      return NextResponse.json(
        { error: `Invalid source. Must be one of: ${validSources.join(', ')}` },
        { status: 400 }
      );
    }

    // Validate items if provided
    if (items && !Array.isArray(items)) {
      return NextResponse.json(
        { error: "Invalid request: items must be an array" },
        { status: 400 }
      );
    }

    const registry = NotificationRegistry.getInstance();
    
    // Record the count and items
    await registry.recordCount(session.user.id, source, count, items);

    logger.debug('[NOTIFICATIONS_UPDATE] Count updated', {
      userIdHash: Buffer.from(session.user.id).toString('base64').slice(0, 12),
      count,
      itemsCount: items?.length || 0,
    });

    return NextResponse.json({ success: true });
  } catch (error: any) {
    logger.error('[NOTIFICATIONS_UPDATE] Error', {
      error: error instanceof Error ? error.message : String(error),
    });
    return NextResponse.json(
      { error: "Internal server error", message: error.message },
      { status: 500 }
    );
  }
}