import { NextRequest, NextResponse } from 'next/server'
import { getStripeClient } from '@/lib/stripe/client'
import Stripe from 'stripe'

// This is your Stripe CLI webhook secret
const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET

async function handler(req: NextRequest) {
  const body = await req.text()
  const signature = req.headers.get('stripe-signature') || ''
  
  const stripe = getStripeClient()
  
  let event: Stripe.Event

  try {
    event = stripe.webhooks.constructEvent(body, signature, webhookSecret!)
  } catch (err) {
    console.error('Webhook signature verification failed:', err)
    return NextResponse.json(
      { error: 'Invalid signature' },
      { status: 400 }
    )
  }

  // Handle the event
  switch (event.type) {
    case 'checkout.session.completed':
      const checkoutSession = event.data.object as Stripe.Checkout.Session
      console.log('Payment received for session:', checkoutSession.id)
      console.log('Customer email:', checkoutSession.customer_email)
      console.log('Amount:', checkoutSession.amount_total)
      console.log('Items:', checkoutSession.display_items)
      
      // TODO: Create order record in database
      // TODO: Send confirmation email to customer
      // TODO: Update inventory for physical products
      break
      
    case 'payment_intent.succeeded':
      const paymentIntent = event.data.object as Stripe.PaymentIntent
      console.log('Payment succeeded for intent:', paymentIntent.id)
      // TODO: Handle any post-payment logic
      break
      
    case 'payment_intent.payment_failed':
      const failedPayment = event.data.object as Stripe.PaymentIntent
      console.log('Payment failed for intent:', failedPayment.id)
      console.log('Failure reason:', failedPayment.last_payment_error?.message)
      // TODO: Handle failed payment (notify customer, etc.)
      break
      
    case 'invoice.payment_succeeded':
      const invoice = event.data.object as Stripe.Invoice
      console.log('Invoice payment succeeded for invoice:', invoice.id)
      // TODO: Handle recurring payment success
      break
      
    case 'invoice.payment_failed':
      const failedInvoice = event.data.object as Stripe.Invoice
      console.log('Invoice payment failed for invoice:', failedInvoice.id)
      // TODO: Handle recurring payment failure
      break
      
    default:
      console.log(`Unhandled event type: ${event.type}`)
  }

  return NextResponse.json({ received: true })
}

export { handler as POST }