import { Elysia, t } from 'elysia'
import { cors } from '@elysiajs/cors'
import { staticPlugin } from '@elysiajs/static'
import Stripe from 'stripe'

const stripe = new Stripe(process.env.STRIPE_SECRET_KEY ?? '', {
  apiVersion: '2025-01-27.acacia',
})

const DOMAIN = process.env.DOMAIN ?? 'http://localhost:3000'

// Produit LUMIÈRE_ORBITALE — prix en centimes (EUR)
const PRODUCTS = {
  lumiere_orbitale: {
    name: 'LUMIÈRE_ORBITALE — REBOUR',
    description: 'Lampe de table unique. Béton texturé coulé à la main + dôme céramique laqué. Collection 001.',
    amount: 180000, // 1800 EUR
    currency: 'eur',
  },
}

const app = new Elysia()
  .use(cors({
    origin: DOMAIN,
    methods: ['GET', 'POST'],
  }))
  // Sert les fichiers statiques (html, css, js, assets)
  .use(staticPlugin({
    assets: '.',
    prefix: '/',
    indexHTML: true,
  }))

  // ── Créer une session de checkout Stripe ──────────────────────────────────
  .post(
    '/api/checkout',
    async ({ body }) => {
      const product = PRODUCTS[body.product as keyof typeof PRODUCTS]
      if (!product) {
        throw new Error('Produit inconnu')
      }

      const session = await stripe.checkout.sessions.create({
        mode: 'payment',
        payment_method_types: ['card'],
        line_items: [
          {
            price_data: {
              currency: product.currency,
              unit_amount: product.amount,
              product_data: {
                name: product.name,
                description: product.description,
              },
            },
            quantity: 1,
          },
        ],
        success_url: `${DOMAIN}/success.html?session_id={CHECKOUT_SESSION_ID}`,
        cancel_url:  `${DOMAIN}/#collection`,
        locale: 'fr',
        custom_text: {
          submit: { message: 'Pièce unique — fabriquée à Paris. Délai de fabrication : 6 à 8 semaines.' },
        },
      })

      return { url: session.url }
    },
    {
      body: t.Object({
        product: t.String(),
        email:   t.Optional(t.String({ format: 'email' })),
      }),
    }
  )

  // ── Vérification de session (page success) ────────────────────────────────
  .get(
    '/api/session/:id',
    async ({ params }) => {
      const session = await stripe.checkout.sessions.retrieve(params.id)
      return {
        status:      session.payment_status,
        amount:      session.amount_total,
        currency:    session.currency,
        customer_email: session.customer_details?.email ?? null,
      }
    },
    {
      params: t.Object({ id: t.String() }),
    }
  )

  // ── Webhook Stripe ────────────────────────────────────────────────────────
  .post('/api/webhook', async ({ request, headers }) => {
    const sig = headers['stripe-signature']
    const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET

    if (!sig || !webhookSecret) {
      return new Response('Missing signature', { status: 400 })
    }

    let event: Stripe.Event
    const rawBody = await request.arrayBuffer()
    try {
      event = stripe.webhooks.constructEvent(
        Buffer.from(rawBody),
        sig,
        webhookSecret
      )
    } catch (err) {
      console.error('⚠ Webhook signature invalide:', err)
      return new Response('Webhook Error', { status: 400 })
    }

    if (event.type === 'checkout.session.completed') {
      const session = event.data.object as Stripe.Checkout.Session
      if (session.payment_status === 'paid') {
        console.log(`✓ Paiement reçu — session: ${session.id}`)
        console.log(`  Client: ${session.customer_details?.email}`)
        console.log(`  Montant: ${(session.amount_total ?? 0) / 100} EUR`)
        // → ici : envoyer email confirmation, mettre à jour BDD, etc.
      }
    }

    return { received: true }
  })

  .listen(3000)

console.log(`
  ┌──────────────────────────────────────┐
  │  REBOUR — SERVEUR DÉMARRÉ            │
  │  http://localhost:3000               │
  │                                      │
  │  POST /api/checkout                  │
  │  GET  /api/session/:id               │
  │  POST /api/webhook                   │
  └──────────────────────────────────────┘
`)