<?php
namespace Adianti\Widget\Form;

use Adianti\Core\AdiantiApplicationConfig;
use Adianti\Widget\Form\AdiantiWidgetInterface;
use Adianti\Widget\Base\TElement;
use Adianti\Widget\Base\TScript;
use Adianti\Widget\Form\TField;
use Adianti\Widget\Util\TImage;

/**
 * Html Editor
 *
 * @version    8.4
 * @package    widget
 * @subpackage form
 * @author     Pablo Dall'Oglio
 * @copyright  Copyright (c) 2006 Adianti Solutions Ltd. (http://www.adianti.com.br)
 * @license    https://adiantiframework.com.br/license
 */
class THtmlEditor extends TField implements AdiantiWidgetInterface
{
    protected $id;
    protected $size;
    protected $formName;
    protected $toolbar;
    protected $customButtons;
    protected $completion;
    protected $options;
    protected $xssProtection;
    private   $height;
    
    /**
     * Class Constructor
     * @param $name Widet's name
     */
    public function __construct($name)
    {
        parent::__construct($name);
        $this->id = 'THtmlEditor_'.mt_rand(1000000000, 1999999999);
        $this->toolbar = true;
        $this->options = [];
        $this->customButtons = [];
        $this->xssProtection = true;
        
        // creates a tag
        $this->tag = new TElement('textarea');
        $this->tag->{'widget'} = 'thtmleditor';
    }
    
    /**
     * Define max length
     * @param  $length Max length
     */
    public function setMaxLength($length)
    {
        if ($length > 0)
        {
            $this->options['maxlength'] = $length;
        }
    }

    /**
     * Set extra calendar options
     * @link https://summernote.org/deep-dive/
     */
    public function setOption($option, $value)
    {
        $this->options[$option] = $value;
    }

    /**
     * Add custom button
     *
     * @link https://summernote.org/deep-dive/#custom-button
     * @param $name     String  name action
     * @param $function String  function(context){  }
     * @param $title    String  title icon
     * @param $icon     TImage  toolbar icon
     */
    public function addCustomButton($name, $function, $title, TImage $icon, $showLabel = false)
    {
        $this->customButtons[] = [
            'name' => $name,
            'function' => base64_encode($function),
            'title' => base64_encode($title),
            'showLabel' => $showLabel,
            'icon' => base64_encode($icon->getContents()),
        ];
    }
    
    /**
     * Define the widget's size
     * @param  $width   Widget's width
     * @param  $height  Widget's height
     */
    public function setSize($width, $height = NULL)
    {
        $this->size   = $width;
        if ($height)
        {
            $this->height = $height;
        }
    }
    
    /**
     * Returns the size
     * @return array(width, height)
     */
    public function getSize()
    {
        return array( $this->size, $this->height );
    }
    
    /**
     * Disable toolbar
     */
    public function disableToolbar()
    {
        $this->toolbar = false;
    }
    
    /**
     * Define options for completion
     * @param $options array of options for completion
     */
    public function setCompletion($options)
    {
        $this->completion = $options;
    }
    
    /**
     * Disable XSS protection
     */
    public function disableXssProtection()
    {
        $this->xssProtection = false;
    }
    
    /**
     * Enable the field
     * @param $form_name Form name
     * @param $field Field name
     */
    public static function enableField($form_name, $field)
    {
        TScript::create( " thtmleditor_enable_field('{$form_name}', '{$field}'); " );
    }
    
    /**
     * Disable the field
     * @param $form_name Form name
     * @param $field Field name
     */
    public static function disableField($form_name, $field)
    {
        TScript::create( " thtmleditor_disable_field('{$form_name}', '{$field}'); " );
    }
    
    /**
     * Clear the field
     * @param $form_name Form name
     * @param $field Field name
     */
    public static function clearField($form_name, $field)
    {
        TScript::create( " thtmleditor_clear_field('{$form_name}', '{$field}'); " );
    }
    
    /**
     * Reload completion
     * 
     * @param $field Field name or id
     * @param $options array of options for autocomplete
     */
    public static function reloadCompletion($field, $options)
    {
        $options = json_encode($options);
        TScript::create(" thtml_editor_reload_completion( '{$field}', $options); ");
    }
    
    /**
     * Insert text
     * @param $form_name Form name
     * @param $field Field name
     * @param $content Text content
     */
    public static function insertText($form_name, $field, $content)
    {
        TScript::create( " thtmleditor_insert_text('{$form_name}', '{$field}', '{$content}'); " );
    }
    
    /**
     * Insert html
     * @param $form_name Form name
     * @param $field Field name
     * @param $content Text content
     */
    public static function insertHTML($form_name, $field, $content)
    {
        $content64 = base64_encode($content);
        TScript::create( " thtmleditor_insert_html('{$form_name}', '{$field}', '{$content64}'); " );
    }
    
    /**
     * Show the widget
     */
    public function show()
    {
        $this->tag->{'id'} = $this->id;
        $this->tag->{'class'}  = 'thtmleditor';       // CSS
        $this->tag->{'name'}   = $this->name;   // tag name
        
        $ini = AdiantiApplicationConfig::get();
        $locale = !empty($ini['general']['locale']) ? $ini['general']['locale'] : 'pt-BR';
        
        // add the content to the textarea
        $this->tag->add(htmlspecialchars( (string) $this->value));
        
        $this->tag->{'style'} = 'width:1px;height:1px;position: absolute;left: 10px;top: 10px; padding:0; border:0';
        
        // show the tag
        $div = new TElement('div');
        $div->{'style'} = 'display: none';
        $div->add($this->tag);
        $div->show();
        
        $options = $this->options;
        if (!$this->toolbar)
        {
            $options[ 'airMode'] = true;
        }
        if (!empty($this->completion))
        {
            $options[ 'completion'] = $this->completion;
        }
        
        if (!$this->xssProtection)
        {
            $options['codeviewFilter'] = false;
            $options['codeviewIframeFilter'] = false;
        }
        
        $options_json = json_encode( $options );
        $buttons_json = json_encode( $this->customButtons );
        
        $id = $this->tag->{'id'};
        
        TScript::create(" thtmleditor_start( '{$id}', '{$this->size}', '{$this->height}', '{$locale}', '{$options_json}', '{$buttons_json}' ); ");
        TScript::create(" $('#{$id}').parent().show();");
        
        // check if the field is not editable
        if (!parent::getEditable())
        {
            TScript::create( " thtmleditor_disable_field('{$this->formName}', '{$this->name}'); " );
        }
    }
}
