src/app/api/payments/checkout/route.ts

import { NextRequest, NextResponse } from "next/server";
import { db } from "@/lib/db";
import { createCheckoutSession, getOrCreateStripeCustomer } from "@/lib/stripe";

// Endpoint para iniciar checkout de Stripe
// Body: { userId, influencerId, tier, price }
export async function POST(request: NextRequest) {
  try {
    const body = await request.json();
    const { userId, influencerId, tier, price } = body;
    const origin = request.headers.get("origin") || "http://localhost:7860";

    if (!userId || !influencerId || !tier || !price) {
      return NextResponse.json({ success: false, error: "userId, influencerId, tier y price son requeridos" }, { status: 400 });
    }

    // Obtener usuario e influencer
    const user = await db.user.findUnique({ where: { id: userId } });
    if (!user) return NextResponse.json({ success: false, error: "Usuario no encontrado" }, { status: 404 });

    const influencer = await db.aIInfluencer.findUnique({ where: { id: influencerId } });
    if (!influencer) return NextResponse.json({ success: false, error: "Influencer no encontrado" }, { status: 404 });

    // Crear o obtener cliente Stripe
    const email = user.email || `user-${userId}@dev.local`;
    const stripeCustomerId = await getOrCreateStripeCustomer(userId, email, user.name || undefined);

    // Crear sesión de checkout
    const sessionId = await createCheckoutSession({
      userId,
      influencerId,
      influencerName: influencer.name,
      tier,
      price,
      stripeCustomerId,
      origin,
    });

    return NextResponse.json({ success: true, sessionId, checkoutUrl: `https://checkout.stripe.com/pay/${sessionId}` });
  } catch (error: unknown) {
    const message = error instanceof Error ? error.message : "Error desconocido";
    console.error("Checkout error:", message);
    return NextResponse.json({ success: false, error: message }, { status: 500 });
  }
}