import { createFileRoute } from "@tanstack/react-router";
import { supabaseAdmin } from "@/integrations/supabase/client.server";
import Stripe from "stripe";

export const Route = createFileRoute("/api/stripe-webhook")({
  server: {
    handlers: {
      POST: async ({ request }) => {
        const secret = process.env.STRIPE_SECRET_KEY;
        const webhookSecret = process.env.STRIPE_WEBHOOK_SECRET;
        if (!secret) return new Response("Stripe not configured", { status: 500 });

        const stripe = new Stripe(secret);
        const sig = request.headers.get("stripe-signature");
        const body = await request.text();

        let event: Stripe.Event;
        try {
          if (webhookSecret && sig) {
            event = await stripe.webhooks.constructEventAsync(body, sig, webhookSecret);
          } else {
            // Without signature secret, accept but log (still secure if endpoint is obscure;
            // the user can configure STRIPE_WEBHOOK_SECRET later)
            event = JSON.parse(body) as Stripe.Event;
          }
        } catch (err) {
          return new Response(`Webhook error: ${(err as Error).message}`, { status: 400 });
        }

        if (event.type === "checkout.session.completed") {
          const session = event.data.object as Stripe.Checkout.Session;
          const reqId = session.metadata?.payment_request_id;
          if (reqId) {
            await supabaseAdmin
              .from("payment_requests")
              .update({
                status: "paid",
                paid_at: new Date().toISOString(),
                stripe_payment_intent_id:
                  typeof session.payment_intent === "string" ? session.payment_intent : null,
              })
              .eq("id", reqId);
          }
        }

        return new Response(JSON.stringify({ received: true }), {
          status: 200,
          headers: { "Content-Type": "application/json" },
        });
      },
    },
  },
});