import { type NextRequest, NextResponse } from "next/server"
import Stripe from "stripe"

export async function POST(request: NextRequest) {
  try {
    const stripeSecretKey = process.env.STRIPE_SECRET_KEY
    const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET

    if (!stripeSecretKey || !webhookSecret) {
      return NextResponse.json({ error: "Stripe not configured" }, { status: 500 })
    }

    const stripe = new Stripe(stripeSecretKey, {
      apiVersion: "2024-12-18.acacia",
    })

    const body = await request.text()
    const signature = request.headers.get("stripe-signature")!

    let event: Stripe.Event

    try {
      event = stripe.webhooks.constructEvent(body, signature, webhookSecret)
    } catch (err) {
      console.error("[v0] Webhook signature verification failed:", err)
      return NextResponse.json({ error: "Invalid signature" }, { status: 400 })
    }

    // Handle the event
    switch (event.type) {
      case "checkout.session.completed": {
        const session = event.data.object as Stripe.Checkout.Session
        console.log("[v0] Payment successful:", session.id)

        // Here you would:
        // 1. Store the registration in your database
        // 2. Send confirmation email
        // 3. Add to attendee list

        break
      }
      case "payment_intent.succeeded": {
        const paymentIntent = event.data.object as Stripe.PaymentIntent
        console.log("[v0] PaymentIntent successful:", paymentIntent.id)
        break
      }
      case "payment_intent.payment_failed": {
        const paymentIntent = event.data.object as Stripe.PaymentIntent
        console.error("[v0] Payment failed:", paymentIntent.id)
        break
      }
      default:
        console.log("[v0] Unhandled event type:", event.type)
    }

    return NextResponse.json({ received: true })
  } catch (err) {
    console.error("[v0] Webhook error:", err)
    return NextResponse.json({ error: "Webhook error" }, { status: 500 })
  }
}