{# app/templates/shop/cart.html #}
{% extends "shop/base.html" %}

{% block title %}Shopping Cart{% endblock %}

{# Alpine.js component #}
{% block alpine_data %}shoppingCart(){% endblock %}

{% block content %}
<div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">

    {# Breadcrumbs #}
    <div class="breadcrumb mb-6">
        <a href="{{ base_url }}" class="hover:text-primary">Home</a>
        <span>/</span>
        <a href="{{ base_url }}shop/products" class="hover:text-primary">Products</a>
        <span>/</span>
        <span class="text-gray-900 dark:text-gray-200 font-medium">Cart</span>
    </div>

    {# Page Header #}
    <div class="mb-8">
        <h1 class="text-3xl md:text-4xl font-bold text-gray-800 dark:text-gray-200 mb-2">
            Shopping Cart
        </h1>
    </div>

    {# Loading State #}
    <div x-show="loading && items.length === 0" class="flex justify-center items-center py-12">
        <div class="spinner"></div>
    </div>

    {# Empty Cart #}
    <div x-show="!loading && items.length === 0" class="text-center py-12 bg-white dark:bg-gray-800 rounded-lg border-2 border-dashed border-gray-300 dark:border-gray-600">
        <div class="text-6xl mb-4">🛒</div>
        <h3 class="text-2xl font-semibold text-gray-700 dark:text-gray-200 mb-2">
            Your cart is empty
        </h3>
        <p class="text-gray-600 dark:text-gray-400 mb-6">
            Add some products to get started!
        </p>
        <a href="{{ base_url }}shop/products" class="inline-block px-6 py-3 bg-primary text-white rounded-lg hover:bg-primary-dark transition-colors">
            Browse Products
        </a>
    </div>

    {# Cart Items #}
    <div x-show="items.length > 0" class="grid grid-cols-1 lg:grid-cols-3 gap-8">

        {# Cart Items List #}
        <div class="lg:col-span-2 space-y-4">
            <template x-for="item in items" :key="item.product_id">
                <div class="bg-white dark:bg-gray-800 rounded-lg shadow-sm p-6">
                    <div class="flex gap-6">
                        {# Item Image #}
                        <div class="flex-shrink-0">
                            <img
                                :src="item.image_url || '/static/shop/img/placeholder.svg'"
                                @error="$el.src = '/static/shop/img/placeholder.svg'"
                                :alt="item.name"
                                class="w-24 h-24 object-cover rounded-lg"
                            >
                        </div>

                        {# Item Details #}
                        <div class="flex-1">
                            <h3 class="text-lg font-semibold text-gray-800 dark:text-gray-200 mb-1" x-text="item.name"></h3>
                            <p class="text-sm text-gray-500 dark:text-gray-400 mb-2" x-text="'SKU: ' + item.sku"></p>
                            <p class="text-xl font-bold text-primary mb-4">
                                €<span x-text="parseFloat(item.price).toFixed(2)"></span>
                            </p>

                            {# Quantity Controls #}
                            <div class="flex items-center gap-4">
                                <div class="flex items-center gap-2">
                                    <button
                                        @click="updateQuantity(item.product_id, item.quantity - 1)"
                                        :disabled="item.quantity <= 1 || updating"
                                        class="w-8 h-8 flex items-center justify-center border-2 border-gray-300 dark:border-gray-600 rounded hover:bg-gray-100 dark:hover:bg-gray-700 disabled:opacity-50 disabled:cursor-not-allowed"
                                    >
                                        −
                                    </button>
                                    <input
                                        type="number"
                                        :value="item.quantity"
                                        @change="updateQuantity(item.product_id, $event.target.value)"
                                        min="1"
                                        max="99"
                                        :disabled="updating"
                                        class="w-16 text-center px-2 py-1 border-2 border-gray-300 dark:border-gray-600 rounded font-semibold dark:bg-gray-700 dark:text-white"
                                    >
                                    <button
                                        @click="updateQuantity(item.product_id, item.quantity + 1)"
                                        :disabled="updating"
                                        class="w-8 h-8 flex items-center justify-center border-2 border-gray-300 dark:border-gray-600 rounded hover:bg-gray-100 dark:hover:bg-gray-700 disabled:opacity-50 disabled:cursor-not-allowed"
                                    >
                                        +
                                    </button>
                                </div>

                                <div class="flex-1 text-right">
                                    <p class="text-sm text-gray-500 dark:text-gray-400">Subtotal</p>
                                    <p class="text-xl font-bold text-gray-800 dark:text-gray-200">
                                        €<span x-text="(parseFloat(item.price) * item.quantity).toFixed(2)"></span>
                                    </p>
                                </div>

                                <button
                                    @click="removeItem(item.product_id)"
                                    :disabled="updating"
                                    class="w-10 h-10 flex items-center justify-center border border-gray-300 dark:border-gray-600 rounded hover:bg-red-600 hover:border-red-600 hover:text-white transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
                                    title="Remove from cart"
                                >
                                    🗑️
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
            </template>
        </div>

        {# Cart Summary #}
        <div class="lg:col-span-1">
            <div class="bg-white dark:bg-gray-800 rounded-lg shadow-sm p-6 sticky top-4">
                <h3 class="text-xl font-semibold mb-6 pb-4 border-b-2 border-gray-200 dark:border-gray-700">
                    Order Summary
                </h3>

                <div class="space-y-3 mb-6">
                    <div class="flex justify-between">
                        <span class="text-gray-600 dark:text-gray-400">Subtotal (<span x-text="totalItems"></span> items):</span>
                        <span class="font-semibold">€<span x-text="subtotal.toFixed(2)"></span></span>
                    </div>

                    <div class="flex justify-between">
                        <span class="text-gray-600 dark:text-gray-400">Shipping:</span>
                        <span class="font-semibold" x-text="shipping > 0 ? '€' + shipping.toFixed(2) : 'FREE'"></span>
                    </div>

                    <div class="flex justify-between text-lg font-bold pt-3 border-t-2 border-gray-200 dark:border-gray-700">
                        <span>Total:</span>
                        <span class="text-primary text-2xl">€<span x-text="total.toFixed(2)"></span></span>
                    </div>
                </div>

                <button
                    @click="proceedToCheckout()"
                    :disabled="updating || items.length === 0"
                    class="w-full px-6 py-3 bg-primary text-white rounded-lg font-semibold hover:bg-primary-dark transition-colors disabled:opacity-50 disabled:cursor-not-allowed mb-3"
                >
                    Proceed to Checkout
                </button>

                <a href="{{ base_url }}shop/products" class="block w-full px-6 py-3 text-center border-2 border-gray-300 dark:border-gray-600 rounded-lg hover:bg-gray-100 dark:hover:bg-gray-700 transition-colors">
                    Continue Shopping
                </a>

                <p class="text-xs text-gray-500 dark:text-gray-400 mt-4 text-center">
                    Free shipping on orders over €50
                </p>
            </div>
        </div>
    </div>

</div>
{% endblock %}

{% block extra_scripts %}
<script>
document.addEventListener('alpine:init', () => {
    Alpine.data('shoppingCart', () => {
        const baseData = shopLayoutData();

        return {
            ...baseData,

            items: [],
            loading: false,
            updating: false,

            // Computed properties
            get totalItems() {
                return this.items.reduce((sum, item) => sum + item.quantity, 0);
            },

            get subtotal() {
                return this.items.reduce((sum, item) =>
                    sum + (parseFloat(item.price) * item.quantity), 0
                );
            },

            get shipping() {
                // Free shipping over €50
                return this.subtotal >= 50 ? 0 : 5.99;
            },

            get total() {
                return this.subtotal + this.shipping;
            },

            // Initialize
            async init() {
                console.log('[SHOP] Cart page initializing...');

                // Call parent init to set up sessionId
                if (baseData.init) {
                    baseData.init.call(this);
                }

                await this.loadCart();
            },

        // Load cart from API
        async loadCart() {
            this.loading = true;

            try {
                console.log(`[SHOP] Loading cart for session ${this.sessionId}...`);
                const response = await fetch(`/api/v1/shop/cart/${this.sessionId}`);

                if (response.ok) {
                    const data = await response.json();
                    this.items = data.items || [];
                    this.cartCount = this.totalItems;
                    console.log('[SHOP] Cart loaded:', this.items.length, 'items');
                }
            } catch (error) {
                console.error('[SHOP] Failed to load cart:', error);
                this.showToast('Failed to load cart', 'error');
            } finally {
                this.loading = false;
            }
        },

        // Update item quantity
        async updateQuantity(productId, newQuantity) {
            newQuantity = parseInt(newQuantity);

            if (newQuantity < 1 || newQuantity > 99) return;

            this.updating = true;

            try {
                console.log('[SHOP] Updating quantity:', productId, newQuantity);
                const response = await fetch(
                    `/api/v1/shop/cart/${this.sessionId}/items/${productId}`,
                    {
                        method: 'PUT',
                        headers: {
                            'Content-Type': 'application/json'
                        },
                        body: JSON.stringify({ quantity: newQuantity })
                    }
                );

                if (response.ok) {
                    await this.loadCart();
                    this.showToast('Quantity updated', 'success');
                } else {
                    throw new Error('Failed to update quantity');
                }
            } catch (error) {
                console.error('[SHOP] Update quantity error:', error);
                this.showToast('Failed to update quantity', 'error');
            } finally {
                this.updating = false;
            }
        },

        // Remove item from cart
        async removeItem(productId) {
            if (!confirm('Remove this item from your cart?')) {
                return;
            }

            this.updating = true;

            try {
                console.log('[SHOP] Removing item:', productId);
                const response = await fetch(
                    `/api/v1/shop/cart/${this.sessionId}/items/${productId}`,
                    {
                        method: 'DELETE'
                    }
                );

                if (response.ok) {
                    await this.loadCart();
                    this.showToast('Item removed from cart', 'success');
                } else {
                    throw new Error('Failed to remove item');
                }
            } catch (error) {
                console.error('[SHOP] Remove item error:', error);
                this.showToast('Failed to remove item', 'error');
            } finally {
                this.updating = false;
            }
        },

        // Proceed to checkout
        proceedToCheckout() {
            // Check if customer is logged in
            const token = localStorage.getItem('customer_token');

            if (!token) {
                // Redirect to login with return URL
                window.location.href = '{{ base_url }}shop/account/login?return={{ base_url }}shop/checkout';
            } else {
                window.location.href = '{{ base_url }}shop/checkout';
            }
        }
        };
    });
});
</script>
{% endblock %}