<?php

class Advanced_Sidebar_Nav_Widget extends WP_Widget
{

    public function __construct()
    {
        $widget_opts = array(
            'classname' => 'advanced-sidebar-nav-widget',
            'description' => __('The best way to display navigation menus on sidebar, no matter how many depth!'),
        );

        parent::__construct(false, __('Advanced Sidebar Nav'), $widget_opts);
    }

    public function widget($args, $instance)
    {
        // asset output
        wp_enqueue_script('jquery');
        wp_enqueue_script('advanced-sidebar-nav');
        wp_enqueue_style('advanced-sidebar-nav');

        // html output
        echo $args['before_widget'];

        if (!empty($instance['title'])) {
            echo $args['before_title'] . apply_filters('widget_title', $instance['title']) . $args['after_title'];
        }

        echo wp_nav_menu(array(
            'menu' => $instance['menu'],
            'menu_class' => 'advanced-sidebar-menu',
            'container_class' => 'advanced-sidebar-nav advanced-sidebar-nav-default',
            'echo' => false,
        ));

        if ($instance['color']) {
            $css = "#{$this->id} .advanced-sidebar-nav > ul {background-color: {$instance['color']}}";
            wp_add_inline_style('advanced-sidebar-nav', $css);
        }

        echo $args['after_widget'];
    }

    public function update($new_instance, $old_instance)
    {
        $instance = array();
        $instance['title'] = !empty($new_instance['title']) ? strip_tags($new_instance['title']) : '';
        $instance['menu'] = !empty($new_instance['menu']) ? $new_instance['menu'] : null;
        $instance['color'] = !empty($new_instance['color']) ? $new_instance['color'] : '#ffffff';

        return $instance;
    }

    public function form($instance)
    {
        echo Advanced_Sidebar_Nav_Widget_Opts::text(array(
            'name' => esc_attr($this->get_field_name('title')),
            'label' => 'Title:',
            'description' => '',
            'value' => @$instance['title'],
        ));

        echo Advanced_Sidebar_Nav_Widget_Opts::select(array(
            'name' => esc_attr($this->get_field_name('menu')),
            'label' => 'Select Menu:',
            'description' => '',
            'options' => 'menu',
            'value' => @$instance['menu'],
        ));

        echo Advanced_Sidebar_Nav_Widget_Opts::select(array(
            'name' => esc_attr($this->get_field_name('theme')),
            'label' => 'Select Theme:',
            'description' => __('More themes are comming soon...'),
            'options' => array(
                'default' => 'Default',
            ),
            'value' => @$instance['menu'],
        ));

        echo Advanced_Sidebar_Nav_Widget_Opts::color(array(
            'name' => esc_attr($this->get_field_name('color')),
            'label' => 'Accent Color:',
            'description' => '',
            'value' => @$instance['color'],
            'default' => '#0F434F',
        ));
    }
}