n array
	 */
	public function get_all_email_template_meta( $email_template_id ) {
		global $wpdb;
		$results = $wpdb->get_results(
			$wpdb->prepare(
				"SELECT meta_key, meta_value FROM {$wpdb->prefix}cartflows_ca_email_templates_meta WHERE email_template_id = %d",
				$email_template_id
			),
			ARRAY_A
		);
		$meta    = [];
		foreach ( $results as $row ) {
			$meta[ $row['meta_key'] ] = maybe_unserialize( $row['meta_value'] );
		}
		// Fill missing keys with defaults.
		$defaults = function_exists( 'wcf_ca' ) ? wcf_ca()->options->get_email_template_meta_defaults() : [];
		return array_merge( $defaults, $meta );
	}

	/**
	 * AJAX: Search WooCommerce products for ProductSearchField.
	 * Handles both search by term and get products by comma-separated IDs.
	 */
	public function search_products() {
		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			wp_send_json_error( [ 'message' => $this->get_error_msg( 'permission' ) ] );
		}

		$nonce = isset( $_POST['security'] ) ? sanitize_text_field( $_POST['security'] ) : '';
		if ( ! wp_verify_nonce( $nonce, 'wcar_search_products' ) ) {
			wp_send_json_error( [ 'message' => $this->get_error_msg( 'nonce' ) ] );
		}
		
		$term           = isset( $_POST['term'] ) ? sanitize_text_field( wp_unslash( $_POST['term'] ) ) : '';
		$product_ids    = isset( $_POST['product_ids'] ) ? sanitize_text_field( wp_unslash( $_POST['product_ids'] ) ) : '';
		$posts_per_page = isset( $_POST['posts_per_page'] ) ? absint( wp_unslash( $_POST['posts_per_page'] ) ) : 20;
		
		$products = [];
		
		if ( ! empty( $term ) && strlen( $term ) >= 3 ) {
			// Use WooCommerce's search method to search the products.
			$data = \WC_Data_Store::load( 'product' );
			$ids  = $data->search_products( $term, '', true, false, $posts_per_page );
			
			// Get all product objects including variations.
			$product_objects = array_filter( array_map( 'wc_get_product', $ids ), 'wc_products_array_filter_readable' );
			
			foreach ( $product_objects as $product_object ) {
				if ( ! $product_object ) {
					continue;
				}
				
				$products[] = $this->format_product_data( $product_object );
			}
		} elseif ( ! empty( $product_ids ) ) {
			// Get products by IDs.
			$ids_array = array_filter( array_map( 'intval', explode( ',', $product_ids ) ) );
			if ( ! empty( $ids_array ) ) {
				foreach ( $ids_array as $product_id ) {
					$product_object = wc_get_product( $product_id );
					if ( $product_object ) {
						$products[] = $this->format_product_data( $product_object );
					}
				}
			}
		}
		
		wp_send_json_success( $products );
	}

	/**
	 * Format product data for response.
	 *
	 * @param WC_Product $product_object Product object.
	 * @return array Formatted product data.
	 */
	private function format_product_data( $product_object ) {
		$product_id = $product_object->get_id();
		$image_id   = get_post_thumbnail_id( $product_id );
		$image_url  = $image_id ? wp_get_attachment_image_url( $image_id, 'thumbnail' ) : '';
		
		$managing_stock = $product_object->managing_stock();
		$is_in_stock    = $product_object->is_in_stock();
		$product_type   = $product_object->get_type();
		
		$availibility_text   = $this->get_stock_availability_text( $product_object );
		$product_price_range = $this->get_formatted_product_price_range( $product_object );
		
		// Format name for variations.
		$formatted_name = $product_object->get_name();

		// phpcs:disable
		/*
		 if ( $product_type === 'variation' ) {
			 $formatted_name = $formatted_name . ' - ' . __( 'Variation', 'woo-cart-abandonment-recovery' );
		} */
		// phpcs:enable
		
		return [
			'value'          => (string) $product_id,
			'label'          => $formatted_name,
			'image'          => $image_url,
			'original_price' => $product_object->get_price(),
			'product_name'   => $product_object->get_name(),
			'product_type'   => $product_type,
			'stock_status'   => $availibility_text,
			'in_stock'       => $is_in_stock,
			'price_range'    => $product_price_range,
		];
	}

	/**
	 * Get stock availability text for product.
	 *
	 * @param WC_Product $product_object Product object.
	 * @return string Stock availability text.
	 */
	private function get_stock_availability_text( $product_object ) {
		if ( ! $product_object->is_in_stock() ) {
			return __( 'Out of stock', 'woo-cart-abandonment-recovery' );
		}
		
		if ( $product_object->managing_stock() ) {
			$stock_quantity = $product_object->get_stock_quantity();
			if ( $stock_quantity <= 0 ) {
				return __( 'Out of stock', 'woo-cart-abandonment-recovery' );
			}
			return sprintf( 
				// translators: %d: Number of items in stock.
				__( '%d in stock', 'woo-cart-abandonment-recovery' ), 
				$stock_quantity
			);
		}
		
		return __( 'In stock', 'woo-cart-abandonment-recovery' );
	}

	/**
	 * Get formatted product price range.
	 *
	 * @param WC_Product $product_object Product object.
	 * @return string Formatted price range.
	 */
	private function get_formatted_product_price_range( $product_object ) {
		if ( $product_object->is_type( 'variable' ) ) {
			$prices = $product_object->get_variation_prices( true );
			if ( ! empty( $prices['price'] ) ) {
				$min_price = current( $prices['price'] );
				$max_price = end( $prices['price'] );
				if ( $min_price !== $max_price ) {
					return wc_format_price_range( $min_price, $max_price );
				}
			}
		}
		
		return $product_object->get_price_html();
	}

	/**
	 * Restore default email templates via AJAX.
	 *
	 * @since 2.0.0
	 * @return void
	 */
	public function restore_email_templates(): void {
		$response_data = [ 'message' => $this->get_error_msg( 'permission' ) ];

		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			wp_send_json_error( $response_data );
		}

		if ( ! check_ajax_referer( 'wcar_restore_email_templates', 'security', false ) ) {
			$response_data = [ 'message' => $this->get_error_msg( 'nonce' ) ];
			wp_send_json_error( $response_data );
		}

		include_once CARTFLOWS_CA_DIR . 'modules/cart-abandonment/classes/class-cartflows-ca-database.php';
		$db = \Cartflows_Ca_Database::get_instance();
		$db->template_table_seeder( true );

		global $wpdb;
		$templates           = $wpdb->get_results( "SELECT * FROM {$wpdb->prefix}cartflows_ca_email_templates ORDER BY id ASC" );
		$email_templates     = \Cartflows_Ca_Email_Templates::get_instance();
		$formatted_templates = [];

		foreach ( $templates as $template ) {
			$meta                  = $email_templates->get_all_email_template_meta( $template->id );
			$formatted_templates[] = array_merge(
				[
					'id'                   => $template->id,
					'template_name'        => $template->template_name,
					'email_subject'        => $template->email_subject,
					'email_body'           => $template->email_body,
					'is_activated'         => boolval( $template->is_activated ) ? 'on' : '',
					'email_frequency'      => $template->frequency,
					'email_frequency_unit' => $template->frequency_unit,
				],
				$meta
			);
		}

		wp_send_json_success(
			[
				'message'   => __( 'Default email templates restored successfully.', 'woo-cart-abandonment-recovery' ),
				'templates' => $formatted_templates,
			] 
		);
	}

	/**
	 * Send preview email.
	 *
	 * @since 2.0.0
	 * @return void
	 */
	public function send_preview_email(): void {
		$response_data = [ 'message' => $this->get_error_msg( 'permission' ) ];

		if ( ! current_user_can( 'manage_woocommerce' ) ) {
			wp_send_json_error( $response_data );
		}

		if ( empty( $_POST ) ) {
			$response_data = [ 'message' => $this->get_error_msg( 'missing-data' ) ];
			wp_send_json_error( $response_data );
		}

		/**
		 * Nonce verification
		 */
		if ( ! check_ajax_referer( 'wcar_send_preview_email', 'security', false ) ) {
			$response_data = [ 'message' => $this->get_error_msg( 'nonce' ) ];
			wp_send_json_error( $response_data );
		}

		$email_schedule = \Cartflows_Ca_Email_Schedule::get_instance();
		$mail_result    = $email_schedule->send_email_templates( null, true );

		if ( $mail_result ) {
			wp_send_json_success( [ 'message' => __( 'Test email sent successfully!', 'woo-cart-abandonment-recovery' ) ] );
		} else {
			wp_send_json_error( [ 'message' => __( 'Failed to send test email', 'woo-cart-abandonment-recovery' ) ] );
		}
	}
}