<?php

namespace App\Services\Payment;

use App\Contracts\PaymentGateway;
use App\Data\Payment\PaymentResponseDTO;
use App\Data\Stripe\StripeLineItemDTO;
use App\Data\Stripe\StripeSessionDataDTO;
use App\Enums\Payment\PaymentModes;
use App\Enums\Stripe\StripeCurrency;
use App\Enums\Stripe\StripePaymentMode;
use App\Models\Order;
use Exception;
use Illuminate\Support\Facades\Log;
use Stripe\Checkout\Session;
use Stripe\Stripe;

class StripePaymentGateway implements PaymentGateway
{
    public function __construct()
    {
        Stripe::setApiKey(config('services.stripe.secret'));
    }

    public function charge(Order $order): PaymentResponseDTO
    {
        $cart = $order->cart()->withProducts()->first();

        $totalAmount = 0;
        $lineItems = [];

        foreach ($cart->products as $product) {
            $priceInCents = (int) ($product->pivot->price * 100);

            $totalAmount += ($priceInCents * $product->pivot->quantity);

            $lineItems[] = new StripeLineItemDTO(
                currency: StripeCurrency::INR,
                price: $priceInCents,
                productName: $product->title,
                productDescription: $product->description,
                quantity: $product->pivot->quantity,
            );
        }

        $currency = StripeCurrency::INR->value;

        try {
            $data = new StripeSessionDataDTO(
                lineItems: $lineItems,
                mode: StripePaymentMode::Payment,
                successUrl: config('app.frontend_url').'/checkout/confirmation?order_id='.$order->id.'&session_id={CHECKOUT_SESSION_ID}',
                cancelUrl: config('app.frontend_url').'/checkout/payment?order_id='.$order->id,
            );
            $session = Session::create($data->toArray());

            // add stripe session to order
            $order->stripeSession()->create(
                [
                    'session_id' => $session->id,
                ]
            );

            return PaymentResponseDTO::success(
                transactionId: $session->id,
                amount: $totalAmount,
                currency: $currency,
                method: PaymentModes::StripeCheckout,
                redirectUrl: $session->url,
            );

        } catch (Exception $e) {
            Log::error('Stripe Checkout session cannot be created.', ['error' => $e->getMessage()]);

            return PaymentResponseDTO::failure(
                amount: $totalAmount,
                currency: $currency,
                method: PaymentModes::StripeCheckout,
                errorMessage: 'Payment gateway unavailable. Please try again.'
            );
        }
    }
}