<?php
/**
 * AJAX endpoints for cart actions, category loading, and product search.
 */

/**
 * AJAX handler for adding products to cart
 */
function matreshka_ajax_add_to_cart() {
	// Check nonce for security
	check_ajax_referer( 'matreshka_add_to_cart_nonce', 'nonce' );

	// Get product ID and quantity
	$product_id = isset( $_POST['product_id'] ) ? absint( $_POST['product_id'] ) : 0;
	$quantity   = isset( $_POST['quantity'] ) ? absint( $_POST['quantity'] ) : 1;

	// Validate product ID
	if ( $product_id <= 0 ) {
		wp_send_json_error( array(
			'message' => __( 'Invalid product ID', 'matreshka' ),
		) );
	}

	// Check if WooCommerce is active
	if ( ! function_exists( 'WC' ) ) {
		wp_send_json_error( array(
			'message' => __( 'WooCommerce is not active', 'matreshka' ),
		) );
	}

	// Add product to cart
	$cart_item_key = WC()->cart->add_to_cart( $product_id, $quantity );

	if ( $cart_item_key ) {
		WC()->cart->calculate_totals();
		WC()->cart->set_session();
		WC()->cart->maybe_set_cart_cookies();

		// Success - return cart data
		wp_send_json_success( array(
			'message'    => __( 'Product added to cart', 'matreshka' ),
			'cart_count' => WC()->cart->get_cart_contents_count(),
			'cart_total' => WC()->cart->get_total( 'edit' ),
			'cart_total_html' => WC()->cart->get_total(),
			'cart_hash'  => WC()->cart->get_cart_hash(),
			'cart_url'   => wc_get_cart_url(),
			'fragments'  => apply_filters( 'woocommerce_add_to_cart_fragments', array() ),
		) );
	} else {
		$notices = function_exists( 'wc_get_notices' ) ? wc_get_notices( 'error' ) : array();
		$message = __( 'Could not add product to cart', 'matreshka' );

		if ( ! empty( $notices ) ) {
			$last_notice = end( $notices );
			if ( is_array( $last_notice ) && ! empty( $last_notice['notice'] ) ) {
				$message = wp_strip_all_tags( $last_notice['notice'] );
			} elseif ( is_string( $last_notice ) ) {
				$message = wp_strip_all_tags( $last_notice );
			}
		}

		// Error adding to cart
		wp_send_json_error( array(
			'message' => $message,
		) );
	}
}
add_action( 'wp_ajax_matreshka_add_to_cart', 'matreshka_ajax_add_to_cart' );
add_action( 'wp_ajax_nopriv_matreshka_add_to_cart', 'matreshka_ajax_add_to_cart' );

/**
 * AJAX handler for getting cart count
 */
function matreshka_ajax_get_cart_count() {
	// Check nonce for security
	check_ajax_referer( 'matreshka_add_to_cart_nonce', 'nonce' );

	// Check if WooCommerce is active
	if ( ! function_exists( 'WC' ) ) {
		wp_send_json_error( array(
			'message' => __( 'WooCommerce is not active', 'matreshka' ),
		) );
	}

	// Return cart count and total
	wp_send_json_success( array(
		'cart_count'      => WC()->cart->get_cart_contents_count(),
		'cart_total'      => WC()->cart->get_total( 'edit' ),
		'cart_total_html' => WC()->cart->get_total(),
	) );
}
add_action( 'wp_ajax_matreshka_get_cart_count', 'matreshka_ajax_get_cart_count' );
add_action( 'wp_ajax_nopriv_matreshka_get_cart_count', 'matreshka_ajax_get_cart_count' );

/**
 * AJAX handler for checking if product is in cart
 */
function matreshka_ajax_is_product_in_cart() {
	// Check nonce for security
	check_ajax_referer( 'matreshka_add_to_cart_nonce', 'nonce' );

	// Check if WooCommerce is active
	if ( ! function_exists( 'WC' ) ) {
		wp_send_json_error( array(
			'message' => __( 'WooCommerce is not active', 'matreshka' ),
		) );
	}

	$product_id = isset( $_POST['product_id'] ) ? absint( $_POST['product_id'] ) : 0;

	if ( ! $product_id ) {
		wp_send_json_error( array(
			'message' => __( 'Invalid product ID', 'matreshka' ),
		) );
	}

	// Check if product is in cart
	$in_cart = false;
	foreach ( WC()->cart->get_cart() as $cart_item ) {
		if ( $cart_item['product_id'] == $product_id ) {
			$in_cart = true;
			break;
		}
	}

	// Return result
	wp_send_json_success( array(
		'in_cart'  => $in_cart,
		'cart_url' => wc_get_cart_url(),
	) );
}
add_action( 'wp_ajax_matreshka_is_product_in_cart', 'matreshka_ajax_is_product_in_cart' );
add_action( 'wp_ajax_nopriv_matreshka_is_product_in_cart', 'matreshka_ajax_is_product_in_cart' );

/**
 * AJAX handler for getting product categories
 */
function matreshka_ajax_get_categories() {
	// Check nonce for security
	check_ajax_referer( 'matreshka_add_to_cart_nonce', 'nonce' );

	// Check if WooCommerce is active
	if ( ! function_exists( 'WC' ) ) {
		wp_send_json_error( array(
			'message' => __( 'WooCommerce is not active', 'matreshka' ),
		) );
	}

	// Get product categories
	$categories = get_terms( array(
		'taxonomy'   => 'product_cat',
		'hide_empty' => true,
		'pad_counts' => true,
		'parent'     => 0, // Only top-level categories
	) );

	if ( is_wp_error( $categories ) ) {
		wp_send_json_error( array(
			'message' => __( 'Error loading categories', 'matreshka' ),
		) );
	}

	$categories_data = array();
	foreach ( $categories as $category ) {
		// Skip Misc category
		if ( $category->slug === 'misc' ) {
			continue;
		}
		$thumbnail_id = get_term_meta( $category->term_id, 'thumbnail_id', true );
		$image = wp_get_attachment_url( $thumbnail_id );

		// Get category color from ACF or meta
		$color = function_exists('get_field') ? get_field('category_color', 'product_cat_' . $category->term_id) : '';
		if ( ! $color ) {
			$color = '#f5f5f5'; // Default color
		}

		$categories_data[] = array(
			'id'    => $category->term_id,
			'name'  => $category->name,
			'url'   => get_term_link( $category ),
			'image' => $image ? $image : '',
			'color' => $color,
		);
	}

	wp_send_json_success( array(
		'categories' => $categories_data,
	) );
}
add_action( 'wp_ajax_matreshka_get_categories', 'matreshka_ajax_get_categories' );
add_action( 'wp_ajax_nopriv_matreshka_get_categories', 'matreshka_ajax_get_categories' );

/**
 * AJAX handler for searching products
 */
function matreshka_ajax_search_products() {
	// Check nonce for security
	check_ajax_referer( 'matreshka_add_to_cart_nonce', 'nonce' );

	// Check if WooCommerce is active
	if ( ! function_exists( 'WC' ) ) {
		wp_send_json_error( array(
			'message' => __( 'WooCommerce is not active', 'matreshka' ),
		) );
	}

	$query = isset( $_POST['query'] ) ? sanitize_text_field( $_POST['query'] ) : '';

	if ( empty( $query ) ) {
		wp_send_json_error( array(
			'message' => __( 'Empty search query', 'matreshka' ),
		) );
	}

	// Search products
	$args = array(
		'post_type'      => 'product',
		'posts_per_page' => 10,
		's'              => $query,
		'post_status'    => 'publish',
	);

	$products_query = new WP_Query( $args );
	$products_data = array();

	if ( $products_query->have_posts() ) {
		while ( $products_query->have_posts() ) {
			$products_query->the_post();
			$product = wc_get_product( get_the_ID() );

			if ( ! $product ) {
				continue;
			}

			// Get product category
			$categories = wp_get_post_terms( get_the_ID(), 'product_cat' );
			$category_name = ! empty( $categories ) ? $categories[0]->name : '';

			// Get product image
			$image = wp_get_attachment_image_url( $product->get_image_id(), 'thumbnail' );
			if ( ! $image ) {
				$image = wc_placeholder_img_src();
			}

			$products_data[] = array(
				'id'       => $product->get_id(),
				'name'     => $product->get_name(),
				'url'      => get_permalink( $product->get_id() ),
				'image'    => $image,
				'category' => $category_name,
				'price'    => $product->get_price_html(),
			);
		}
		wp_reset_postdata();
	}

	wp_send_json_success( array(
		'products' => $products_data,
	) );
}
add_action( 'wp_ajax_matreshka_search_products', 'matreshka_ajax_search_products' );
add_action( 'wp_ajax_nopriv_matreshka_search_products', 'matreshka_ajax_search_products' );