{% extends "tienda/base.html" %}
{% load static %}
{% load vat_filters %}

{% block head %}
<script src="https://js.stripe.com/v3/"></script>
<script src="{% static 'js/checkout.js' %}"></script>
<script defer src="https://use.fontawesome.com/releases/v6.4.0/js/all.js"></script>
<style>
    .payment-methods {
        display: flex;
        gap: 15px;
        flex-wrap: wrap;
        margin-top: 20px;
    }
    
    .payment-btn {
        flex: 1;
        min-width: 200px;
        padding: 12px 20px;
        font-size: 16px;
        font-weight: 500;
    }
    
    .payment-section {
        background-color: #f8f9fa;
        padding: 30px;
        border-radius: 8px;
        margin-top: 20px;
    }
    
    .payment-section h3 {
        margin-bottom: 20px;
        color: #212529;
    }
</style>
{% endblock %}


{% block content %}
<div class="row mt-2">
    <div class="col-md-12">
        <!-- Token CSRF para requests AJAX -->
        {% csrf_token %}
        
        <div class="d-flex justify-content-between align-items-center mb-3">
            <h1>Checkout</h1>
            <a href="{% url 'view_cart' %}" class="btn btn-outline-secondary">← Volver al carrito</a>
        </div>

        {% if cart_items %}
        <div class="card mb-4">
            <div class="card-body">
                <h5 class="card-title mb-3">1) Selecciona la dirección de envío</h5>
                {% if addresses %}
                <div class="mb-3">
                    <label for="shipping-address" class="form-label">Dirección</label>
                    <select id="shipping-address" class="form-select" required>
                        <option value="">Selecciona una dirección...</option>
                        {% for address in addresses %}
                        <option value="{{ address.id }}" {% if address.is_default %}selected{% endif %}>
                            {{ address.full_name }} - {{ address.address_line_1 }}, {{ address.postal_code }} {{ address.city }}
                        </option>
                        {% endfor %}
                    </select>
                </div>
                {% else %}
                <div class="alert alert-warning mb-0 d-flex justify-content-between align-items-center flex-wrap gap-2">
                    <span>No tienes direcciones de envío creadas.</span>
                    <a href="{% url 'crear_direccion' %}" class="btn btn-primary btn-sm">Crear dirección</a>
                </div>
                {% endif %}
            </div>
        </div>

        <div class="table-responsive mb-4">
            <table class="table table-striped align-middle">
                <thead>
                    <tr>
                        <th>Producto</th>
                        <th class="text-end">Precio (sin IVA)</th>
                        <th class="text-end">Cantidad</th>
                        <th class="text-end">Subtotal (con IVA)</th>
                    </tr>
                </thead>
                <tbody>
                    {% for item in cart_items %}
                    <tr>
                        <td>{{ item.product.name }}</td>
                        <td class="text-end">{{ item.product.price|format_price }}€</td>
                        <td class="text-end">{{ item.quantity }}</td>
                        <td class="text-end">{{ item.get_subtotal_with_vat|format_price }}€</td>
                    </tr>
                    {% endfor %}
                </tbody>
                <tfoot>
                    <tr>
                        <th colspan="2" class="text-end">Subtotal:</th>
                        <th colspan="2" class="text-end">{{ cart.get_total|format_price }}€</th>
                    </tr>
                    <tr>
                        <th colspan="2" class="text-end">IVA (21%):</th>
                        <th colspan="2" class="text-end text-success">+{{ cart.get_vat_amount|format_price }}€</th>
                    </tr>
                    <tr style="background-color: #f8f9fa;">
                        <th colspan="2" class="text-end" style="font-size: 1.1rem;">Total:</th>
                        <th colspan="2" class="text-end" style="font-size: 1.1rem;">{{ cart.get_total_with_vat|format_price }}€</th>
                    </tr>
                </tfoot>
            </table>
        </div>

        <div class="payment-section">
            <h3>2) Selecciona tu método de pago</h3>
            <div class="payment-methods">
                <button
                    id="checkout-button"
                    class="btn btn-primary payment-btn"
                    data-config-url="/tienda/config/"
                    data-session-url="/tienda/create-checkout-session/"
                    {% if not addresses %}disabled{% endif %}>
                    💳 Pagar con Stripe
                </button>
                
                <button
                    id="paypal-button"
                    class="btn btn-warning payment-btn"
                    data-payment-url="{% url 'create_paypal_payment' %}"
                    {% if not addresses %}disabled{% endif %}>
                    🅿️ Pagar con PayPal
                </button>
            </div>
        </div>
        {% else %}
        <div class="alert alert-info">Tu carrito está vacío.</div>
        {% endif %}
    </div>
</div>

<script>
    // Manejo del botón de PayPal
    document.getElementById('paypal-button').addEventListener('click', async function(e) {
        e.preventDefault();

        const shippingAddressSelect = document.getElementById('shipping-address');
        const selectedShippingAddress = shippingAddressSelect ? shippingAddressSelect.value : '';
        if (!selectedShippingAddress) {
            alert('Selecciona una dirección de envío para continuar.');
            return;
        }
        
        const button = this;
        const originalText = button.innerHTML;
        button.disabled = true;
        button.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Procesando...';
        
        try {
            // Obtener CSRF token de múltiples formas
            let csrfToken = document.querySelector('[name=csrfmiddlewaretoken]')?.value;
            if (!csrfToken) {
                csrfToken = document.querySelector('input[name="csrfmiddlewaretoken"]')?.value;
            }
            if (!csrfToken) {
                csrfToken = document.cookie.split('; ').find(row => row.startsWith('csrftoken='))?.split('=')[1];
            }
            
            console.log('CSRF Token encontrado:', csrfToken ? 'Sí' : 'No');
            
            const response = await fetch(button.dataset.paymentUrl, {
                method: 'POST',
                headers: {
                    'X-CSRFToken': csrfToken || '',
                    'Content-Type': 'application/json',
                },
                body: JSON.stringify({ shipping_address_id: selectedShippingAddress })
            });
            
            console.log('Response status:', response.status);
            
            const data = await response.json();
            console.log('Response data:', data);
            
            if (response.ok && data.redirect) {
                // Redirigir a PayPal
                console.log('Redirigiendo a:', data.redirect);
                window.location.href = data.redirect;
            } else if (data.error) {
                console.error('Error en respuesta:', data.error);
                alert('Error: ' + data.error);
                button.disabled = false;
                button.innerHTML = originalText;
            } else {
                console.error('Respuesta inesperada:', data);
                alert('Error inesperado al procesar el pago');
                button.disabled = false;
                button.innerHTML = originalText;
            }
        } catch (error) {
            console.error('Error en fetch:', error);
            alert('Error al procesar el pago con PayPal: ' + error.message);
            button.disabled = false;
            button.innerHTML = originalText;
        }
    });
</script>
{% endblock %}