managarten/apps/bauntown/apps/landing/netlify/functions/create-payment-intent.js

// Dieses Skript erstellt eine Stripe Checkout Session anstatt eines Payment Intents
const stripe = require('stripe')(process.env.STRIPE_SECRET_KEY);

exports.handler = async (event, context) => {
  // CORS Headers
  const headers = {
    "Access-Control-Allow-Origin": "*", 
    "Access-Control-Allow-Headers": "Content-Type",
    "Access-Control-Allow-Methods": "POST, OPTIONS"
  };
  
  // Handle OPTIONS request (CORS preflight)
  if (event.httpMethod === "OPTIONS") {
    return {
      statusCode: 200,
      headers,
      body: ""
    };
  }

  try {
    // Parse request
    const data = JSON.parse(event.body || '{}');
    const { amount, isRecurring, priceId, coffeeSize } = data;
    
    // Debug-Ausgabe
    console.log("Request data:", { amount, isRecurring, priceId, coffeeSize });
    console.log("Stripe key available:", !!process.env.STRIPE_SECRET_KEY);
    
    // Fallback, wenn kein Stripe-Key verfügbar
    if (!process.env.STRIPE_SECRET_KEY) {
      console.log("WARNUNG: STRIPE_SECRET_KEY fehlt - liefere Test-Antwort");
      return {
        statusCode: 200,
        headers,
        body: JSON.stringify({
          url: `${process.env.URL || 'https://bauntown.com'}/support-success?test=true`,
          isRecurring: isRecurring || false,
          message: "Test mode - no Stripe key available"
        })
      };
    }
    
    // Betrag in Cent umrechnen für Stripe
    const amountInCents = Math.round(amount * 100);
    
    let sessionConfig = {
      payment_method_types: ['card'],
      line_items: [{
        price_data: {
          currency: 'eur',
          product_data: {
            name: `BaunTown Kaffee - ${coffeeSize || 'Mittlerer Kaffee'}`,
            description: isRecurring ? 'Monatliche Unterstützung' : 'Einmalige Unterstützung',
          },
          unit_amount: amountInCents,
          recurring: isRecurring ? { interval: 'month' } : undefined,
        },
        quantity: 1,
      }],
      mode: isRecurring ? 'subscription' : 'payment',
      success_url: `${process.env.URL || 'https://bauntown.com'}/support-success?amount=${amount}&type=${isRecurring ? 'recurring' : 'one-time'}&provider=stripe&coffeeSize=${encodeURIComponent(coffeeSize || 'Mittlerer Kaffee')}`,
      cancel_url: `${process.env.URL || 'https://bauntown.com'}/support-cancel`,
      metadata: {
        isRecurring: isRecurring ? 'true' : 'false',
        priceId: priceId || '',
        coffeeSize: coffeeSize || 'Mittlerer Kaffee'
      }
    };
    
    console.log("Creating checkout session with config:", JSON.stringify(sessionConfig));
    
    try {
      // Stripe Checkout Session erstellen
      const session = await stripe.checkout.sessions.create(sessionConfig);
      
      console.log("Session created:", session.id, "URL:", session.url);
      
      return {
        statusCode: 200,
        headers,
        body: JSON.stringify({
          url: session.url,  // Die Redirect-URL hat Priorität
          isRecurring: isRecurring || false
        })
      };
    } catch (stripeError) {
      console.error("Stripe error:", stripeError);
      return {
        statusCode: 400,
        headers,
        body: JSON.stringify({
          error: {
            message: `Stripe error: ${stripeError.message}`,
            stripeCode: stripeError.code || 'unknown'
          }
        })
      };
    }
  } catch (error) {
    console.error("Function error:", error);
    
    return {
      statusCode: 500,
      headers,
      body: JSON.stringify({
        error: {
          message: error.message || "Unknown server error"
        }
      })
    };
  }
};