computer/api/create-payment-intent.ts

import Stripe from 'stripe';
import type { VercelRequest, VercelResponse } from '@vercel/node';

// Initialize Stripe with secret key
const stripe = new Stripe(process.env.STRIPE_SECRET_KEY || '', {
  apiVersion: '2024-12-18.acacia',
});

// CORS headers
const corsHeaders = {
  'Access-Control-Allow-Origin': '*',
  'Access-Control-Allow-Methods': 'POST, OPTIONS',
  'Access-Control-Allow-Headers': 'Content-Type',
};

export default async function handler(
  req: VercelRequest,
  res: VercelResponse
) {
  // Handle CORS preflight
  if (req.method === 'OPTIONS') {
    return res.status(200).setHeaders(corsHeaders).end();
  }

  if (req.method !== 'POST') {
    return res
      .status(405)
      .setHeaders(corsHeaders)
      .json({ error: 'Method not allowed' });
  }

  try {
    const { amount, currency = 'usd', metadata = {} } = req.body;

    // Validate amount
    if (!amount || amount <= 0) {
      return res
        .status(400)
        .setHeaders(corsHeaders)
        .json({ error: 'Invalid amount' });
    }

    // Create payment intent
    const paymentIntent = await stripe.paymentIntents.create({
      amount: Math.round(amount * 100), // Convert to cents
      currency,
      automatic_payment_methods: {
        enabled: true,
      },
      metadata,
    });

    return res
      .status(200)
      .setHeaders(corsHeaders)
      .json({
        clientSecret: paymentIntent.client_secret,
        paymentIntentId: paymentIntent.id,
      });
  } catch (error) {
    console.error('Error creating payment intent:', error);

    return res
      .status(500)
      .setHeaders(corsHeaders)
      .json({
        error: 'Failed to create payment intent',
        message: error instanceof Error ? error.message : 'Unknown error'
      });
  }
}