import { NextResponse } from "next/server";
import Stripe from "stripe";
import { createClient } from "@supabase/supabase-js";

const stripe = new Stripe(process.env.STRIPE_SECRET_KEY);
const supabase = createClient(process.env.SUPABASE_SERVICE_ROLE_KEY);

export async function POST(request) {
  try {
    const { clientId, customerId } = await request.json();

    const { data: userData, error: userError } = await supabase
      .from("subscription_data")
      .select("*")
      .eq("customer_id", customerId)
      .maybeSingle();

    if (userError || !userData) {
      return NextResponse.json(
        { error: "subscription_data not found" },
        { status: 404 }
      );
    }

    const { subscription_cost } = userData;

    // Create a new product and price
    const product = await stripe.products.create({
      name: "RankRunners Client Subscription",
    });

    const price = await stripe.prices.create({
      product: product.id,
      unit_amount: subscription_cost * 100,
      currency: "usd",
      recurring: { interval: "month" },
    });

    // Create a Checkout session
    const session = await stripe.checkout.sessions.create({
      customer: customerId,
      payment_method_types: ["card"],
      line_items: [
        {
          price: price.id,
          quantity: 1,
        },
      ],
      mode: "subscription",
      success_url: `${process.env.NEXT_PUBLIC_URL}/client-area?session_id={CHECKOUT_SESSION_ID}`,
      cancel_url: `${process.env.NEXT_PUBLIC_URL}/client-area`,
    });

    if (!session) {
      return NextResponse.json(
        { error: "Failed to create checkout session" },
        { status: 500 }
      );
    }

    // Save the session ID to Supabase
    const { error: updateError } = await supabase
      .from("subscription_data")
      .update({ stripe_session_id: session.id })
      .eq("customer_id", customerId);

    if (updateError) {
      console.error("Error updating stripe_session_id:", updateError);
      return NextResponse.json(
        {
          error:
            "Failed to update subscription data when creating checkout session",
        },
        { status: 500 }
      );
    }

    return NextResponse.json({ url: session.url });
  } catch (error) {
    console.error("Error creating checkout session:", error);
    return NextResponse.json({ error: error.message }, { status: 500 });
  }
}