// app/api/n8n/status/route.ts
import { NextRequest, NextResponse } from "next/server";

// Cache für 30 Sekunden, damit wir n8n nicht zuspammen
export const revalidate = 30;

export async function GET(request: NextRequest) {
  // Rate limiting for n8n status endpoint
  const ip = request.headers.get('x-forwarded-for') || request.headers.get('x-real-ip') || 'unknown';
  const { checkRateLimit } = await import('@/lib/auth');
  
  if (!checkRateLimit(ip, 30, 60000)) { // 30 requests per minute for status
    return NextResponse.json(
      { error: 'Rate limit exceeded. Please try again later.' },
      { status: 429 }
    );
  }
  try {
    // Check if n8n webhook URL is configured
    const n8nWebhookUrl = process.env.N8N_WEBHOOK_URL;
    
    if (!n8nWebhookUrl) {
      // Return fallback if n8n is not configured
      return NextResponse.json({
        status: { text: "offline", color: "gray" },
        music: null,
        gaming: null,
        coding: null,
      });
    }

    // Rufe den n8n Webhook auf
    // Add timestamp to query to bypass Cloudflare cache
    const res = await fetch(
      `${n8nWebhookUrl}/webhook/denshooter-71242/status?t=${Date.now()}`,
      {
        method: "GET",
        headers: {
          "Content-Type": "application/json",
        },
        next: { revalidate: 30 },
      },
    );

    if (!res.ok) {
      throw new Error(`n8n error: ${res.status}`);
    }

    const data = await res.json();

    // n8n gibt oft ein Array zurück: [{...}]. Wir wollen nur das Objekt.
    const statusData = Array.isArray(data) ? data[0] : data;

    // Safety check: if statusData is still undefined/null (e.g. empty array), use fallback
    if (!statusData) {
      throw new Error("Empty data received from n8n");
    }

    // Ensure coding object has proper structure
    if (statusData.coding && typeof statusData.coding === "object") {
      // Already properly formatted from n8n
    } else if (statusData.coding === null || statusData.coding === undefined) {
      // No coding data - keep as null
      statusData.coding = null;
    }

    return NextResponse.json(statusData);
  } catch (error) {
    console.error("Error fetching n8n status:", error);
    // Leeres Fallback-Objekt, damit die Seite nicht abstürzt
    return NextResponse.json({
      status: { text: "offline", color: "gray" },
      music: null,
      gaming: null,
      coding: null,
    });
  }
}