<?php

class Wpw_Menu_Walker extends Walker_Nav_Menu
{
    public $pointer = '';
    public $type = '';
    public $icon_font;
    public $rules_config = [];
    protected $last_config = [];
    protected $wrapper_bg;
    protected $item_bg;

    public function __construct()
    {
        $this->icon_font = Wpw::inst()->storage()->get('default_icon_font');
        $resource = Wpw::inst()->resource();
        $this->wrapper_bg = $resource->render('@theme/templates/components/panels-li-background.php');
        $this->item_bg = $resource->render('@theme/templates/components/panels-inline-background.php');

    }

    public function end_lvl(&$output, $depth = 0, $args = [])
    {
        $indent = str_repeat("\t", $depth);
        $output .= "$indent</ul>\n";
    }

    public function start_lvl(&$output, $depth = 0, $args = [])
    {

        $discard_indent = isset($args->item_spacing) && 'discard' === $args->item_spacing;
        $t = $discard_indent
            ? ''
            : "\t";
        $n = $discard_indent
            ? ''
            : "\n";

        $classes = $this->get_lvl_wrapper_classes($depth + 1);
        $classes .= $this->get_item_wrapper_classes($depth + 1);
        $back_link_classes = $this->get_back_link_classes($depth);
        $indent = str_repeat($t, $depth);
        $output .= "{$n}{$indent}<ul class=\"sub-menu {$classes}\">{$n}";
        $output .= '<li class="menu-item nav-list__item">
                        <a href="#" data-action="menu-back"><span class=" nav-list__back-link ' . $back_link_classes . ' ' . $this->icon_font . '">' .
            $this->item_bg .
            Wpw::inst()->icon()->generate_icon($this->icon_font, 'ib-288') .
            '</span></a>
                        </li>';
        $output .= $this->wrapper_bg;
    }

    public function start_el(&$output, $item, $depth = 0, $args = [], $id = 0)
    {
        $indent = $depth
            ? str_repeat("\t", $depth)
            : '';
        $classes = empty($item->classes)
            ? []
            : (array)$item->classes;

        $submenu_indicator = '';

        $classes[] = 'menu-item-' . $item->ID;
        $classes[] = 'nav-list__item';
        $classes[] = !empty($mega_menu)
            ? ' has-mega-menu '
            : '';
        $args = apply_filters('nav_menu_item_args', $args, $item, $depth);
        $class_names = implode(' ', apply_filters('nav_menu_css_class', array_filter($classes), $item, $args, $depth));

        $id = apply_filters('nav_menu_item_id', 'menu-item-' . $item->ID, $item, $args, $depth);
        $mega_menu = $this->get_mega_menu($item->ID, $id);
        $id = $id
            ? ' id="' . esc_attr($id) . '"'
            : '';
        $output .= $indent . '<li' . $id . ' class="' . $class_names . '" >';
        $atts = [];
        $atts['title'] = !empty($item->attr_title)
            ? $item->attr_title
            : '';
        $atts['target'] = !empty($item->target)
            ? $item->target
            : '';
        $atts['rel'] = !empty($item->xfn)
            ? $item->xfn
            : '';

        $atts['href'] = '';
        if (get_post_meta($item->ID, 'is_section', true) && $item->object == 'page') {
            $atts['href'] = get_home_url('/') . '#' . $item->post_name;
        } else {
            $atts['href'] = !empty($item->url)
                ? $item->url
                : get_the_permalink($item->ID);
        }

        $atts = apply_filters('nav_menu_link_attributes', $atts, $item, $args, $depth);
        $attributes = '';
        foreach ($atts as $attr => $value) {
            if (!empty($value)) {
                $value = ('href' == $attr && $value != '#')
                    ? esc_url($value)
                    : esc_attr($value);
                $attributes .= ' ' . $attr . '="' . $value . '"';
            }
        }
        $title = apply_filters('the_title', $item->title, $item->ID);
        $title = apply_filters('nav_menu_item_title', $title, $item, $args, $depth);
        $item_output = !empty($args->before)
            ? $args->before
            : '';
        $item_output .= '<a' . $attributes . '><span>';
        $item_output .= !empty($args->link_before) && !empty($args->link_after)
            ? $args->link_before . $title . $args->link_after
            : !empty($title)
                ? $title
                : $item->post_title;

        if ($this->has_children || !empty($mega_menu)) {
            $submenu_indicator = '<span class="nav-list__submenu-indicator  ' . $this->icon_font . '">' .
                Wpw::inst()->icon()->generate_icon($this->icon_font, 'ib-289') .
                '</span>';
        }

        $item_output .= '</span>' . $submenu_indicator . $this->item_bg . '</a>';

        $item_output .= $mega_menu;

        $item_output .= !empty($args->after)
            ? $args->after
            : null;
        $output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args);
    }

    protected function get_mega_menu($id, $selector)
    {
        if (class_exists('Wpw')) {
            $mega_menu = Wpw::inst()->menu()->get($id, 'mega_menu');
            $menu_post = is_numeric($mega_menu)
                ? intval($mega_menu)
                : '';
            if (!empty($menu_post)) {
                return '<div class="wpw-mega-menu">' .
                    do_shortcode('[modal modal_post="' . $menu_post . '" for_element="#'.$selector.'" ]') .
                    '</div>';
            }
        }

        return '';
    }

    public function get_lvl_wrapper_classes($lvl = 0)
    {
        $classes = [];
        $config = $this->get_config($lvl);
        $classes[] = !empty($config['lvl_transition'])
            ? 'menu-transition-' . $config['lvl_transition']
            : 'menu-transition-dropdown';
        $classes[] = !empty($config['item_layout'])
            ? 'menu-item-layout-' . $config['item_layout']
            : 'menu-item-layout-row';
        $classes[] = !empty($config['overflow_behaviour'])
            ? 'menu-overflow-' . $config['overflow_behaviour']
            : 'menu-overflow-none';

        return implode(' ', $classes);
    }

    public function get_item_wrapper_classes($lvl = 0)
    {
        $item_config = $this->get_config($lvl);
        $classes[] = !empty($item_config['h_align'])
            ? ' menu-item-h-align-' . $item_config['h_align']
            : ' menu-item-h-align-center';
        $classes[] = !empty($item_config['v_align'])
            ? ' menu-item-v-align-' . $item_config['v_align']
            : ' menu-item-v-align-middle';

        $classes[] = !empty($item_config['submenu_indicator_h_align'])
            ? 'submenu-indicator-h-align-' . $item_config['submenu_indicator_h_align']
            : 'submenu-indicator-h-align-center';
        $classes[] = !empty($item_config['submenu_indicator_v_align'])
            ? 'submenu-indicator-v-align-' . $item_config['submenu_indicator_v_align']
            : 'submenu-indicator-v-align-center';

        $classes[] = !empty($item_config['back_link_h_align'])
            ? 'back-link-h-align-' . $item_config['back_link_h_align']
            : 'back-link-h-align-center';
        $classes[] = !empty($item_config['back_link_v_align'])
            ? 'back-link-v-align-' . $item_config['back_link_v_align']
            : 'back-link-v-align-center';

        $classes[] = !empty($item_config['submenu_indicator_animation'])
            ? 'submenu-indicator-animation-' . $item_config['submenu_indicator_animation']
            : 'submenu-indicator-animation-none';
        $classes[] = !empty($item_config['submenu_indicator_image'])
            ? 'submenu-indicator-image'
            : '';

        return implode(' ', $classes);
    }

    protected function get_back_link_classes($lvl = 0)
    {
        $classes = [];
        $config = $this->get_config($lvl);
        $classes[] = !empty($config['back_link_animation'])
            ? 'back-link-animation-' . $config['back_link_animation']
            : 'back-link-animation-none';
        $classes[] = !empty($config['back_link_image'])
            ? 'back-link-image'
            : '';

        return implode(' ', $classes);
    }

    protected function get_config($lvl)
    {
        return !empty($this->rules_config[$lvl])
            ? $this->rules_config[$lvl]
            : $this->last_config;
    }

    /**
     * @param array $rules_config
     */
    public function set_rules_config($rules_config)
    {
        $index = count($rules_config) - 1;
        $this->rules_config = $rules_config;
        $this->last_config = !empty($rules_config[$index])
            ? $rules_config[$index]
            : [];
    }
}