// Follow this setup guide to integrate the Deno language server with your editor:
// https://deno.land/manual/getting_started/setup_your_environment
// This enables autocomplete, go to definition, etc.

// Import via bare specifier thanks to the import_map.json file.
import Stripe from 'https://esm.sh/stripe@11.1.0?target=deno'

const stripe = new Stripe(Deno.env.get('STRIPE_API_KEY') as string, {
  // This is needed to use the Fetch API rather than relying on the Node http
  // package.
  apiVersion: '2022-11-15',
  httpClient: Stripe.createFetchHttpClient(),
})
// This is needed in order to use the Web Crypto API in Deno.
const cryptoProvider = Stripe.createSubtleCryptoProvider()

console.log('Hello from Stripe Webhook!')

Deno.serve(async (request) => {
  const signature = request.headers.get('Stripe-Signature')

  // First step is to verify the event. The .text() method must be used as the
  // verification relies on the raw request body rather than the parsed JSON.
  const body = await request.text()
  let receivedEvent
  try {
    receivedEvent = await stripe.webhooks.constructEventAsync(
      body,
      signature!,
      Deno.env.get('STRIPE_WEBHOOK_SIGNING_SECRET')!,
      undefined,
      cryptoProvider
    )
  } catch (err) {
    return new Response(err.message, { status: 400 })
  }
  console.log(`🔔 Event received: ${receivedEvent.id}`)
  return new Response(JSON.stringify({ ok: true }), { status: 200 })
})