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

const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!);

// Map price IDs to human-readable tier names
const TIER_NAMES: Record<string, string> = {
  [process.env.STRIPE_PRICE_WEEKLY!]:   "Weekly",
  [process.env.STRIPE_PRICE_MONTHLY!]:  "Monthly",
  [process.env.STRIPE_PRICE_ANNUAL!]:   "Annual",
  [process.env.STRIPE_PRICE_LIFETIME!]: "Lifetime",
};

export async function POST(req: NextRequest) {
  const { priceId } = await req.json();

  if (!priceId || !TIER_NAMES[priceId]) {
    return NextResponse.json({ error: "Invalid price" }, { status: 400 });
  }

  const session = await stripe.checkout.sessions.create({
    mode: "payment",
    line_items: [{ price: priceId, quantity: 1 }],
    success_url: `${process.env.NEXT_PUBLIC_SITE_URL}/purchase/success?session_id={CHECKOUT_SESSION_ID}`,
    cancel_url:  `${process.env.NEXT_PUBLIC_SITE_URL}/uit#pricing`,
    metadata: { tier: TIER_NAMES[priceId] },
    invoice_creation: { enabled: true },
    custom_text: {
      submit: { message: "Your license key will be emailed to you immediately after purchase." },
    },
  });

  return NextResponse.json({ url: session.url });
}