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import { NextResponse } from "next/server"
import type Stripe from "stripe"
import { getStripe } from "@/lib/stripe"
import { createSupabaseAdminClient } from "@/lib/supabase/admin"
import { rateLimit } from "@/lib/rate-limit"
function determineTierFromSubscription(
subscription: Stripe.Subscription
): "pro" | "developer" {
const priceIdentifier = subscription.items?.data?.[0]?.price?.id
const developerPriceIdentifiers = [
process.env.STRIPE_DEVELOPER_MONTHLY_PRICE_IDENTIFIER,
process.env.STRIPE_DEVELOPER_YEARLY_PRICE_IDENTIFIER,
]
if (priceIdentifier && developerPriceIdentifiers.includes(priceIdentifier)) {
return "developer"
}
return "pro"
}
function extractPeriodEnd(subscription: Stripe.Subscription): string | null {
const firstItem = subscription.items?.data?.[0]
if (firstItem?.current_period_end) {
return new Date(firstItem.current_period_end * 1000).toISOString()
}
if (subscription.cancel_at) {
return new Date(subscription.cancel_at * 1000).toISOString()
}
return null
}
async function updateBillingState(
stripeCustomerIdentifier: string,
updates: Record<string, unknown>
) {
const adminClient = createSupabaseAdminClient()
const { error } = await adminClient
.from("user_profiles")
.update(updates)
.eq("stripe_customer_identifier", stripeCustomerIdentifier)
if (error) {
console.error("Failed to update billing state:", error)
}
}
async function handleCheckoutSessionCompleted(
session: Stripe.Checkout.Session
) {
if (session.mode !== "subscription" || !session.subscription) return
const userIdentifier = session.client_reference_id
if (!userIdentifier) return
const subscription = await getStripe().subscriptions.retrieve(
session.subscription as string,
{ expand: ["items.data"] }
)
const adminClient = createSupabaseAdminClient()
await adminClient
.from("user_profiles")
.update({
tier: determineTierFromSubscription(subscription),
stripe_customer_identifier: session.customer as string,
stripe_subscription_identifier: subscription.id,
stripe_subscription_status: subscription.status,
stripe_current_period_end: extractPeriodEnd(subscription),
})
.eq("id", userIdentifier)
}
async function handleSubscriptionUpdated(subscription: Stripe.Subscription) {
const stripeCustomerIdentifier = subscription.customer as string
const updates: Record<string, unknown> = {
stripe_subscription_status: subscription.status,
stripe_current_period_end: extractPeriodEnd(subscription),
}
if (subscription.status === "active") {
updates.tier = determineTierFromSubscription(subscription)
}
await updateBillingState(stripeCustomerIdentifier, updates)
}
async function handleSubscriptionDeleted(subscription: Stripe.Subscription) {
const stripeCustomerIdentifier = subscription.customer as string
await updateBillingState(stripeCustomerIdentifier, {
tier: "free",
stripe_subscription_identifier: null,
stripe_subscription_status: "canceled",
stripe_current_period_end: null,
})
}
async function handleInvoicePaymentFailed(invoice: Stripe.Invoice) {
const stripeCustomerIdentifier = invoice.customer as string
await updateBillingState(stripeCustomerIdentifier, {
stripe_subscription_status: "past_due",
})
}
async function handleInvoicePaid(invoice: Stripe.Invoice) {
const stripeCustomerIdentifier = invoice.customer as string
const lineItem = invoice.lines?.data?.[0]
const priceIdentifier = (lineItem as unknown as { price?: { id?: string } } | undefined)?.price?.id
const developerPriceIdentifiers = [
process.env.STRIPE_DEVELOPER_MONTHLY_PRICE_IDENTIFIER,
process.env.STRIPE_DEVELOPER_YEARLY_PRICE_IDENTIFIER,
]
const tier =
priceIdentifier && developerPriceIdentifiers.includes(priceIdentifier)
? "developer"
: "pro"
await updateBillingState(stripeCustomerIdentifier, {
tier,
stripe_subscription_status: "active",
})
}
export async function POST(request: Request) {
const clientIp = request.headers.get("x-forwarded-for")?.split(",")[0]?.trim() ?? "unknown"
const rateLimitResult = rateLimit(`webhook:${clientIp}`, 60, 60_000)
if (!rateLimitResult.success) {
return NextResponse.json({ error: "Too many requests" }, { status: 429 })
}
const body = await request.text()
const signature = request.headers.get("stripe-signature")
if (!signature) {
return NextResponse.json({ error: "Missing signature" }, { status: 400 })
}
let event: Stripe.Event
try {
event = getStripe().webhooks.constructEvent(
body,
signature,
process.env.STRIPE_WEBHOOK_SECRET!
)
} catch {
return NextResponse.json({ error: "Invalid signature" }, { status: 400 })
}
switch (event.type) {
case "checkout.session.completed":
await handleCheckoutSessionCompleted(
event.data.object as Stripe.Checkout.Session
)
break
case "customer.subscription.updated":
await handleSubscriptionUpdated(
event.data.object as Stripe.Subscription
)
break
case "customer.subscription.deleted":
await handleSubscriptionDeleted(
event.data.object as Stripe.Subscription
)
break
case "invoice.payment_failed":
await handleInvoicePaymentFailed(event.data.object as Stripe.Invoice)
break
case "invoice.paid":
await handleInvoicePaid(event.data.object as Stripe.Invoice)
break
}
return NextResponse.json({ received: true })
}
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