<?php

class Qs_Form_Element_Captcha extends Zend_Form_Element_Captcha
{
    protected $_initialized = false;

    public function __construct($spec, $options = null)
    {
        $this->addPrefixPath('Qs_Captcha', 'Qs/Captcha',  Qs_Form_Element_Captcha::CAPTCHA);
        parent::__construct($spec, $options);
    }
    
    public function loadDefaultDecorators()
    {
        if ($this->loadDefaultDecoratorsIsDisabled()) {
            return $this;
        }

        $decorators = $this->getDecorators();
        if (empty($decorators)) {
            $this->addDecorator('Errors')
                 ->addDecorator('Description', array('tag' => 'p', 'class' => 'description'))
                 ->addDecorator('HtmlTag', array('tag' => 'dd', 'id' => $this->getName() . '-element'))
                 ->addDecorator('Label', array('tag' => 'dt'));
        }

        return $this;
    }

    /**
     * @return Qs_Captcha_Image|Zend_Captcha_Adapter
     */
    public function getCaptcha()
    {
        if (null === $this->_captcha) {
            $this->setCaptcha('image');
        }
        return $this->_captcha;
    }

    public function initRender()
    {
        if ($this->_initialized) {
            return $this;
        }

        $captcha    = $this->getCaptcha();
        $captcha->setName($this->getFullyQualifiedName());
        $decorators = $this->getDecorators();
        $decorator  = $captcha->getDecorator();
        if (!empty($decorator)) {
            array_unshift($decorators, $decorator);
        }
        $decorator = array('Captcha', array('captcha' => $captcha));
        array_unshift($decorators, $decorator);
        $this->setDecorators($decorators);
        $this->setValue($this->getCaptcha()->generate());

        $this->_initialized = true;

        return $this;
    }

    public function render(Zend_View_Interface $view = null)
    {
        $this->initRender();
        return Zend_Form_Element_Xhtml::render($view);
    }
}