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<?php

namespace WPGMZA;

require_once(plugin_dir_path(__FILE__) . 'class.custom-field-filter.php');

class CustomFieldFilterWidget
{
    protected $filter;
    
    public function __construct($filter)
    {
        $this->filter = $filter;
    }
    
    public function getAttributes()
    {
        // TODO: Add filter field attribtues too
        $result = array(
            'data-wpgmza-filter-widget-class'   => get_class($this),
            'data-map-id'                       => $this->filter->getMapID(),
            'data-field-id'                     => $this->filter->getFieldID()
        );
        
        return $result;
    }
    
    public function getAttributesString()
    {
        $attributes = $this->getAttributes();
        $items = array();
        
        foreach($attributes as $name => $value)
            $items[] = $name . '="' . htmlspecialchars($value) . '"';
            
        return implode(' ', $items);
    }
    
    public function html()
    {
        return '';
    }
}

add_filter('wpgmza_get_custom_field_filter_widget', 'WPGMZA\\get_custom_field_filter_widget', 100);

function get_custom_field_filter_widget($filter)
{
    if($filter instanceof CustomFieldFilterWidget)
        return $filter; // An external filter has already created the widget
    
    $dir = plugin_dir_path(__DIR__);
    
    switch($filter->getFieldData()->widget_type)
    {
        case 'text':
            require_once("{$dir}custom-field-filter-widgets/class.text.php");
            return new CustomFieldFilterWidget\Text($filter);
            break;
            
        case 'dropdown':
            require_once("{$dir}custom-field-filter-widgets/class.dropdown.php");
            return new CustomFieldFilterWidget\Dropdown($filter);
            break;
            
        case 'checkboxes':
            require_once("{$dir}custom-field-filter-widgets/class.checkboxes.php");
            return new CustomFieldFilterWidget\Checkboxes($filter);
            break;
        
        default:
            return new CustomFieldFilterWidget($filter);
    }
}

add_filter('wpgooglemaps_filter_map_div_output', 'WPGMZA\\add_custom_filter_widgets');

function add_custom_filter_widgets($html)
{
    $document = new DOMDocument();
    $document->loadHTML($html);
    $element = $document->querySelector('.wpgmza_map');
    
    if(!$element)
    {
        trigger_error('No map element found to add custom field filters to', E_USER_WARNING);
        return $html;
    }
    
    if(!preg_match('/\d+/', $element->getAttribute('id'), $m))
        return $html;
    
    $map_id = (int)$m[0];
    
    $custom_fields = new CustomFields($map_id);
    
    if(count($custom_fields) == 0)
        return $html;
    
    $widget_html = '<div class="wpgmza-filter-widgets" data-map-id="' . $map_id . '">';
    
    foreach($custom_fields as $field)
    {
        $filter = apply_filters('wpgmza_get_custom_field_filter', $field->id, $map_id);
        
        $widget = apply_filters('wpgmza_get_custom_field_filter_widget', $filter);
        $widget_html .= $widget->html();
    }
    
    $widget_html .= '<button type="button" class="wpgmza-reset-custom-fields">' . __('Reset', 'wp-google-maps') . '</button>';
    
    $widget_html .= '</div>';
    
    return $widget_html . $html;
}