import { initServer } from '@li2/analytics';

const li2 = initServer({
  apiKey: process.env.LI2_SECRET_KEY // li2_sk_...
});

// Track lead từ server
const result = await li2.trackLead({
  clickId: "cm3w...", // REQUIRED - lấy từ client
  eventName: "Trial Signup",
  customerExternalId: "user_12345",
  customerEmail: "[email protected]",
  customerName: "Nguyễn Văn A",
  metadata: {
    plan: "pro_trial",
    referrer: "google_ads"
  }
});

if (result.success) {
  console.log('Lead tracked:', result.customerId);
}

// Next.js API Route - Stripe Webhook Handler
import { initServer } from '@li2/analytics';
import Stripe from 'stripe';

const stripe = new Stripe(process.env.STRIPE_SECRET_KEY);
const li2 = initServer({ apiKey: process.env.LI2_SECRET_KEY });

export async function POST(request) {
  const sig = request.headers.get('stripe-signature');
  const event = stripe.webhooks.constructEvent(
    await request.text(),
    sig,
    process.env.STRIPE_WEBHOOK_SECRET
  );

  if (event.type === 'checkout.session.completed') {
    const session = event.data.object;

    // Lấy click ID từ session metadata (đã lưu khi tạo checkout)
    const clickId = session.metadata.clickId;

    await li2.trackSale({
      clickId: clickId, // REQUIRED for server-side
      customerExternalId: session.customer,
      amount: session.amount_total,
      currency: session.currency,
      invoiceId: session.payment_intent,
      paymentProcessor: "stripe",
      eventName: "Subscription Purchase",
      metadata: {
        planId: session.metadata.planId,
        interval: session.metadata.interval
      }
    });
  }

  return Response.json({ received: true });
}

// Track add-to-cart như high-intent lead
li2Analytics.trackLead({
  eventName: "Add to Cart",
  customerExternalId: user.id || user.email,
  customerEmail: user.email,
  metadata: {
    productId: product.id,
    productName: product.name,
    cartValue: product.price
  }
});

// Trên order confirmation page
li2Analytics.trackSale({
  customerExternalId: order.customerId,
  amount: order.total, // Already in cents
  currency: "vnd",
  eventName: "Order Completed",
  invoiceId: order.id,
  paymentProcessor: "momo",
  customerEmail: order.email,
  metadata: {
    items: order.items.map(i => ({
      id: i.id,
      name: i.name,
      quantity: i.quantity
    })),
    shippingMethod: order.shippingMethod
  }
});

li2Analytics.trackLead({
  eventName: "Contact Form Submitted",
  customerExternalId: formData.email, // Dùng email nếu chưa có user ID
  customerEmail: formData.email,
  customerName: formData.name,
  metadata: {
    message: formData.message,
    interestedService: formData.service,
    preferredContactMethod: formData.contactMethod
  }
});

// Sau khi booking & payment thành công
li2Analytics.trackSale({
  customerExternalId: customer.email, // Phải giống lead event
  amount: 15000000, // 15,000,000 VND = 15000000 (không có decimal)
  currency: "vnd",
  eventName: "Consultation Booked",
  invoiceId: booking.id,
  paymentProcessor: "vnpay",
  metadata: {
    consultationType: "premium",
    duration: "60_minutes",
    scheduledDate: booking.date
  }
});