import { NextResponse } from "next/server";
import { prisma } from "@/lib/prisma";
import { auth } from "@/auth";

export async function GET() {
  try {
    const session = await auth();
    if (!session?.user?.id) {
      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
    }

    const userId = session.user.id;
    const traceFilter = { userId };
    const childFilter = { trace: { userId } };

    const [totalTraces, totalSpans, totalDecisions, totalEvents] =
      await Promise.all([
        prisma.trace.count({ where: traceFilter }),
        prisma.span.count({ where: childFilter }),
        prisma.decisionPoint.count({ where: childFilter }),
        prisma.event.count({ where: childFilter }),
      ]);

    return NextResponse.json(
      { totalTraces, totalSpans, totalDecisions, totalEvents },
      { status: 200 }
    );
  } catch (error) {
    console.error("Error fetching stats:", error);
    return NextResponse.json(
      { error: "Internal server error" },
      { status: 500 }
    );
  }
}