<?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 isValid($value, $context = null)
    {
        if ($this->isRequired()) {
            $notEmpty = new Qs_Validate_NotEmpty();
            if (!$notEmpty->isValid($value['input'])) {
                $this->_messages = array_merge($this->_messages, $notEmpty->getMessages());
                $this->_errors = array_merge($this->_errors, $notEmpty->getErrors());
                return false;
            }
        }
        return parent::isValid($value, $context);

    }

    public function loadDefaultDecorators()
    {
        if ($this->loadDefaultDecoratorsIsDisabled()) {
            return $this;
        }

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