<?php

/**
 * Woo filter for sub category
 */
class HbWooAjaxFilterSubCat {

    function __construct() {
        add_action( 'init', [ $this, 'ajax_init' ] );
    }

    public function ajax_init() {
        add_action( 'wp_enqueue_scripts', array( $this, 'woo_cat_filter_ajax_vars' ) );
        if ( wp_doing_ajax() ) {
            add_action( 'wp_ajax_hb_ajax_filter', [ $this, 'filter' ] );
            add_action( 'wp_ajax_nopriv_hb_ajax_filter', [ $this, 'filter' ] );
        }
    }

    public function woo_cat_filter_ajax_vars() {

        if ( is_product_category() ) {
            $category = get_queried_object();
            $cat_id   = $category->term_id;
        } else {
            $cat_id = 'none';
        }

        wp_localize_script( 'conj-scripts', 'hbFilterCat', [
            'url'    => admin_url( 'admin-ajax.php' ),
            'cat_id' => $cat_id
        ] );
    }

    public function filter() {

        $filters = $_POST['filter'];
        $cat_id  = (int) $_POST['cat'];
        if ( ! empty( $filters ) ) {

            $filter_query = $this->getFilter( $filters, $cat_id );

//          var_dump( $filter_query );
            $query = new WP_Query( [
                'post_type' => 'product',
                'tax_query' => [
                    'relation' => 'AND',
                    $filter_query,
                ]
            ] );

            if ( $query->have_posts() ) {
                while ( $query->have_posts() ) {
                    $query->the_post();
                    wc_get_template_part( 'content', 'product' );
                }
            } else {
                echo __( 'No products found' );
            }

            wp_reset_postdata();

            wp_die();
        }

        wp_die();
    }

    public function getFilter( $filters, $cat_id ) {
        $filter_query = [];
        foreach ( $filters as $filter ):
            if ( ! empty( $filter['checked'] ) ) :

                $checked = [];

                foreach ( $filter['checked'] as $filchecked ):
                    $checked[] = (int) $filchecked;
                endforeach;

                $filter_query[] = [
                    'taxonomy' => $filter['termName'],
                    'field'    => 'id',
                    'terms'    => $checked,
                ];
            endif;
        endforeach;

        $filter_query[] = [
            'taxonomy' => 'product_cat',
            'field'    => 'id',
            'terms'    => $cat_id
        ];

        return $filter_query;
    }
}

new HbWooAjaxFilterSubCat();