<?php

/**
 * Class Qs_Form
 *
 * @method Qs_Form_SubForm getSubForm($name)
 */
class Qs_Form extends Zend_Form
{
    use Qs_ConfigTrait;

    const SPAM_PROTECTION_COOKIE      = 'cookie';
    const SPAM_PROTECTION_EMPTY_FIELD = 'field';

    protected $_formRules = [];
    protected $_scriptOptions = [
        'elementsErrorsDisplayMethod' => 'HTML',
        'formErrorsDisplayMethod'     => 'HTML',
        'errorAlertEnabled'           => true,
    ];
    protected $_ajaxValidation = true;
    protected $_cancelUrl;
    protected $_prependId = false;
    protected $_prependString;
    protected $_layout = 'default';
    protected $_initializedRender = false;
    protected $_hiddenElements = [];
    protected $_disabledInitRender = false;
    protected $_elementRemovableDecorators = ['HtmlTag', 'Label', 'DtDdWrapper'];
    protected $_groupRemovableDecorators = ['HtmlTag', 'Fieldset', 'DtDdWrapper'];
    protected $_defaults = [];
    protected $_cmsItemId;
    protected $_primaryKey = [];
    protected $_template;
    protected $_hasButtons = true;
    protected $_controllerAction;

    protected $_hasSpamProtection = false;
    protected $_spamProtectionType = self::SPAM_PROTECTION_COOKIE;
    protected $_spamProtectionMessage = 'Your data were not submitted';
    protected $_spamProtectionField = [
        'label' => 'Leave Empty',
        'name'  => 'alternative_email_address',
    ];

    /** @var  Qs_Form */
    protected $_parentForm;

    public function init()
    {
        $this->_initPaths();
        $this->_initCmsItemIdElement();
        $this->_initPrimaryKeyElements();
        $this->_initElements();
        $this->_initControllerAction();
        $this->_initSpamProtection();
        $this->_initButtons();

        return $this;
    }

    protected function _initPaths()
    {
        $this->addElementPrefixPath('Qs_Filter', 'Qs/Filter/', Zend_Form_Element::FILTER);
        $this->addElementPrefixPath('Zend_Validate', 'Zend/Validate/', 'validate');
        $this->addElementPrefixPath('Zend_Validate_File', 'Zend/Validate/File', 'validate');
        $this->addElementPrefixPath('Qs_Validate', 'Qs/Validate/', 'validate');
        $this->addElementPrefixPath('Qs_Validate_File', 'Qs/Validate/File', 'validate');
        $this->addElementPrefixPath('Qs_Form_Decorator', 'Qs/Form/Decorator/', 'decorator');
        $this->addPrefixPath('Qs_Form_Element', 'Qs/Form/Element/', 'element');
        $this->addPrefixPath('Qs_Form_Decorator', 'Qs/Form/Decorator/', 'decorator');

        return $this;
    }

    public function setOptions(array $options)
    {
        if (isset($options['defaults'])) {
            $this->_defaults = $options['defaults'];
            unset($options['defaults']);
        }
        return parent::setOptions($options);
    }

    protected function _initElements()
    {
        return $this;
    }

    protected function _initControllerAction()
    {
        if (null !== $this->_controllerAction && null === $this->getElement('action')) {
            $this->addElement('hidden', 'action', ['value' => $this->_controllerAction]);
        }
        return $this;
    }

    protected function _getDefaults()
    {
        return $this->_defaults;
    }

    public function setDefaults(array $defaults = [])
    {
        $defaults = Qs_Array::mergeRecursive($this->_getDefaults(), $defaults);
        return parent::setDefaults($defaults);
    }

    public function setDefaultValue($name, $value)
    {
        $this->_defaults[$name] = $value;
        $this->setDefault($name, $value);
    }

    public function addButtons()
    {
        $this->addElement(
            'submit',
            'btnSubmit',
            [
                'label'   => 'Save',
                'attribs' => ['class' => 'btn btn-primary'],
            ]
        );

        $this->addElement(
            'submit',
            'btnCancel',
            [
                'label'   => 'Cancel',
                'attribs' => [
                    'class'   => 'btn',
                    'onclick' => "window.location.href = '" . htmlspecialchars($this->getCancelUrl()) . "';",
                    'helper'  => 'formInputButton',
                ],
            ]
        );

        $this->addDisplayGroup(['btnSubmit', 'btnCancel'], 'submitGroup');
        return $this;
    }

    protected function _initButtons()
    {
        if ($this->_hasButtons) {
            $this->addButtons();
        }
        return $this;
    }

    protected function _initCmsItemIdElement()
    {
        if ($this->getCmsItemId()) {
            $this->addElement('hidden', '__idItem', ['value' => $this->getCmsItemId()]);
        }
        return $this;
    }

    protected function _initPrimaryKeyElements()
    {
        foreach ($this->_primaryKey as $name => $value) {
            $this->addElement('hidden', $name, ['value' => $value]);
        }
        return $this;
    }

    public function setCmsItemId($id)
    {
        $this->_cmsItemId = $id;
        return $this;
    }

    public function getCmsItemId()
    {
        return $this->_cmsItemId;
    }

    public function setPrimaryKey(array $key)
    {
        $this->_primaryKey = $key;
        return $this;
    }

    public function getPrimaryKey()
    {
        return $this->_primaryKey;
    }

    public function setTemplate($template)
    {
        $this->_template = $template;
        return $this;
    }

    public function getTemplate()
    {
        return $this->_template;
    }

    protected function _getData($field = null, $default = null)
    {
        $result = null;
        $method = $this->getMethod();
        if (0 === strcasecmp($_SERVER['REQUEST_METHOD'], $method)) {
            if (false === $field) {
                $result = Qs_Request::get($method);
            } else {
                $method = 'get' . ucfirst(strtolower($method)) . 'Value';
                $result = Qs_Request::$method($field);
            }
        }
        if (null === $result) {
            if (null === $field) {
                $result = $this->_defaults;
            } else {
                $result = Qs_Array::get($this->_defaults, $field);
            }
        }
        return (null === $result) ? $default : $result;
    }

    public function prependId($flag = true)
    {
        $this->_prependId = $flag;
        return $this;
    }

    public function setPrependString($value)
    {
        $this->_prependString = (string) $value;
        return $this;
    }

    public function getPrependString()
    {
        if (null === $this->_prependString) {
            $this->_prependString = $this->getId();
        }
        return $this->_prependString;
    }

    public function getRequestValues()
    {
        $method = strtoupper($this->getAttrib('method'));
        return ('GET' == $method) ? $_GET : $_POST;
    }

    public function getValidationValues()
    {
        return Qs_Array::mergeAssoc($this->getValues(), $this->getRequestValues());
    }

    protected function _prepareData($data = null)
    {
        if (null === $data) {
            $method = strtoupper($this->getAttrib('method'));
            $data = ('GET' == $method) ? $_GET : $_POST;
            if (version_compare(phpversion(), '5.3.0', '<') && 1 == get_magic_quotes_gpc()) {
                $data = $this->_recursiveFilter('stripslashes', $data);
            }
        }
        return $data;
    }

    public function setScriptOptions(array $options)
    {
        $this->_scriptOptions = $options;
        return $this;
    }

    public function getScriptOptions()
    {
        $this->_scriptOptions['prependId'] = $this->_prependId;
        $this->_scriptOptions['isErrors'] = $this->isErrors();
        $this->_scriptOptions['requiredFiles'] = $this->_getRequiredFiles();

        if (!array_key_exists('response', $this->_scriptOptions)) {
            $this->_scriptOptions['response']['formErrors'] = $this->getErrorMessages();
            $this->_scriptOptions['response']['elementsErrors'] = $this->_getAjaxElementsErrors(
                $this,
                $this->getMessages(null, true)
            );
        }

        return $this->_scriptOptions;
    }

    /**
     * @param null|Qs_Form $form
     * @return array
     */
    protected function _getRequiredFiles(Qs_Form $form = null)
    {
        $files = [];

        if (null === $form) {
            $form = $this;
        }

        foreach ($form as $element) {
            if ($element instanceof Zend_Form_Element_File) {
                /** @var $element Zend_Form_Element_File */
                if ($element->isRequired() && !$element->getValue()) {
                    $files[] = [
                        'name'  => $element->getName(),
                        'label' => $element->getLabel(),
                    ];
                }
            } else if ($element instanceof Zend_Form) {
                /** @var $element Zend_Form */
                $files = array_merge($files, $this->_getRequiredFiles($element));
            }
        }

        return $files;
    }

    public function setScriptOption($name, $value)
    {
        $this->_scriptOptions[$name] = $value;
        return $this;
    }

    public function hasScriptOption($name)
    {
        return array_key_exists($name, $this->_scriptOptions);
    }

    public function getScriptOption($name)
    {
        if ($this->hasScriptOption($name)) {
            return $this->_scriptOptions[$name];
        }
        return null;
    }

    public function getElementsErrorsDisplayMethod()
    {
        return Qs_Array::get($this->_scriptOptions, 'elementsErrorsDisplayMethod');
    }

    public function setElementsErrorsDisplayMethod($method)
    {
        $method = strtoupper($method);
        if (!in_array($method, ['ALERT', 'HTML'])) {
            throw new Qs_Form_Exception('Invalid elementsErrorsDisplayMethod "' . $method . '"');
        }
        $this->_scriptOptions['elementsErrorsDisplayMethod'] = $method;

        return $this;
    }

    public function getFormErrorsDisplayMethod()
    {
        return Qs_Array::get($this->_scriptOptions, 'formErrorsDisplayMethod');
    }

    public function setFormErrorsDisplayMethod($method)
    {
        $method = strtoupper($method);
        if (!in_array($method, ['ALERT', 'HTML'])) {
            throw new Qs_Form_Exception('Invalid formErrorsDisplayMethod "' . $method . '"');
        }
        $this->_scriptOptions['formErrorsDisplayMethod'] = $method;

        return $this;
    }

    protected function _setSubformErrors(Qs_Form $form, array $messages)
    {
        foreach ($messages as $elementName => $message) {
            if (null !== ($element = $form->getElement($elementName))) {
                if (is_array($message)) {
                    $element->addErrors($message);
                } else {
                    $element->addError($message);
                }
            } else if (null !== ($subForm = $form->getSubForm($elementName))) {
                $this->_setSubformErrors($subForm, $message);
            } else {
                if (is_array($message)) {
                    $form->addErrors($message);
                } else {
                    $form->addError($message);
                }
            }
        }

        return $this;
    }

    public function validate($data = null)
    {
        if (!$this->_validateSpamProtection()) {
            return false;
        }

        $data = $this->_prepareData($data);
        $valid = $this->isValid($data);

        foreach ($this->_formRules as $rule) {
            if (true !== ($res = call_user_func($rule, $data))) {
                if (is_array($res)) {
                    $this->_setSubformErrors($this, $res);
                    $valid = false;
                } else {
                    throw new Zend_Form_Exception(__CLASS__ . '::' . __METHOD__ . '. Form rule callback returned invalid value');
                }
            }
        }

        return $valid;
    }

    public function validatePartial($data = null)
    {
        if (!$this->_validateSpamProtection()) {
            return false;
        }

        $data = $this->_prepareData($data);
        $valid = $this->isValidPartial($data);

        foreach ($this->_formRules as $rule) {
            if (true !== ($res = call_user_func($rule, $data, true))) { // isXmlHttpRequest = true
                if (is_array($res)) {
                    $res = array_intersect_key($res, $data);
                    if (empty($res)) {
                        continue;
                    }
                }
                if (is_array($res)) {
                    $this->_setSubformErrors($this, $res);
                    $valid = false;
                } else {
                    throw new Zend_Form_Exception(__CLASS__ . '::' . __METHOD__ . '. Form rule callback returned invalid value');
                }
            }
        }
        return $valid;
    }

    public function getAjaxData()
    {
        $this->setIgnoreFiles(true);

        $isArray = $this->isArray();
        $this->setIsArray(false);
        $data = $this->getValues();
        $this->setIsArray($isArray);

        foreach ($this as $item) {
            if ($item instanceof Qs_Form_Element_Autocomplete) {
                /** @var $item Qs_Form_Element_Autocomplete */
                Qs_Array::set($data, $item->getFullyQualifiedDisplayName(), '');
                Qs_Array::set($data, $item->getFullyQualifiedTitleName(), '');
            } else if (
                $item instanceof Qs_Form_Element_Checkbox
                || $item instanceof Zend_Form_Element_Radio
                || $item instanceof Qs_Form_Element_Rating
                || $item instanceof Qs_Form_Element_MultiCheckbox
                || $item instanceof Qs_Form_Element_MultiDraggableSelect
                || ($item instanceof Zend_Form_Element_Select && 'multiple' == strtolower($item->getAttrib('multiple')))
            ) {
                /** @var $item Zend_Form_Element */
                $name = $item->getName();
                if ($item->isRequired() && null === Qs_Array::get($data, $name, null)) {
                    Qs_Array::set($data, $name, '');
                }
            } else if ($item instanceof Qs_Form_SubForm) {
                /** @var $item Qs_Form_SubForm */
                $data[$item->getName()] = $item->getAjaxData();
            }
        }
        return $data;
    }

    public function isValidAjax($data = null)
    {
        $_data = $this->getAjaxData();
        $data = $this->_prepareData($data);
        $data = array_intersect_key($data, $_data);
        $data = Qs_Array::mergeRecursive($_data, $data);

        $valid = $this->isValidPartial($data);

        foreach ($this->_formRules as $rule) {
            if (true !== ($res = call_user_func($rule, $data, true))) { // isXmlHttpRequest = true
                if (is_array($res)) {
                    $res = array_intersect_key($res, $data);
                    if (empty($res)) {
                        continue;
                    }
                }
                if (is_array($res)) {
                    $this->_setSubformErrors($this, $res);
                    $valid = false;
                } else {
                    throw new Zend_Form_Exception(__CLASS__ . '::' . __METHOD__ . '. Form rule callback returned invalid value');
                }
            }
        }
        return $valid;
    }

    protected function _getAjaxElementsErrors(Qs_Form $form, array $elementsErrors)
    {
        $errors = [];

        /** @var Zend_Form_Element $element */
        foreach ($form->getElements() as $name => $element) {
            if (isset($elementsErrors[$name])) {
                $pars = explode('_', get_class($element));
                $elementErrors = [
                    'type'   => strtolower(array_pop($pars)),
                    'id'     => $element->getId(),
                    'label'  => $element->getLabel(),
                    'errors' => $elementsErrors[$name],
                ];

                if ($element instanceof Zend_Form_Element_Captcha) {
                    /** @var $element Zend_Form_Element_Captcha */
                    /** @var $captcha Qs_Captcha_Image */
                    $captcha = $element->getCaptcha();

                    $elementErrors['captcha'] = [
                        'id'  => $captcha->generate(),
                        'src' => $captcha->getImgUrl() . $captcha->getId() . $captcha->getSuffix(),
                    ];

                    if ($captcha->getRefreshUrl()) {
                        $elementErrors['captcha']['href'] = $captcha->getRefreshUrl() . '?id=' . $captcha->getId();
                    }
                    if (empty($elementErrors['label'])) {
                        $elementErrors['label'] = 'Captcha';
                        /** @var $translator Zend_Translate_Adapter_Gettext */
                        $translator = $element->getTranslator();
                        if (null !== $translator) {
                            $elementErrors['label'] = $translator->translate($elementErrors['label']);
                        }
                    }
                }

                $errors[] = $elementErrors;
            }
        }

        /** @var Qs_Form_SubForm $subForm */
        foreach ($form->getSubForms() as $subFormName => $subForm) {
            if (isset($elementsErrors[$subFormName])) {
                $subForm->initRender();
                $errors = array_merge(
                    $errors,
                    $this->_getAjaxElementsErrors($subForm, $elementsErrors[$subFormName])
                );
            }
        }

        return $errors;
    }

    public function validateAjax()
    {
        $result = [];
        if (false === ($result['isValid'] = $this->isValidAjax())) {
            $result['formErrors'] = $this->getErrorMessages();

            $result['elementsErrors'] = [];
            $elementsErrors = $this->getMessages(null, true);
            if (!empty($elementsErrors)) {
                $this->initRender(); //
                /** @var $element Zend_Form_Element */
                $result['elementsErrors'] = array_merge(
                    $result['elementsErrors'],
                    $this->_getAjaxElementsErrors($this, $elementsErrors)
                );
            }
        }

        return $result;
    }

    protected function _recursiveFilter($filter, $value)
    {
        if (is_array($value)) {
            $cleanValues = [];
            foreach ($value as $k => $v) {
                $cleanValues[$k] = $this->_recursiveFilter($filter, $v);
            }
            return $cleanValues;
        } else {
            return call_user_func($filter, $value);
        }
    }

    public function isSubmitted()
    {
        return 0 == strcasecmp($_SERVER['REQUEST_METHOD'], $this->getMethod());
    }

    public function getCancelUrl()
    {
        if (null === $this->_cancelUrl) {
            $this->_cancelUrl = Qs_Constant::get('BASE_URL_LANGUAGE') . '/'
                . Qs_Constant::get('CURRENT_PAGE') . '?action=cancel';
            if ($this->_getData('id')) {
                $this->_cancelUrl .= '&id=' . $this->_getData('id', 0);
            }
        }
        return $this->_cancelUrl;
    }

    public function setCancelUrl($url)
    {
        $this->_cancelUrl = $url;
        return $this;
    }

    /**
     * @param $rule
     * @return $this
     * @throws Zend_Form_Exception
     * @deprecated
     */
    public function addFormRule($rule)
    {
        if (!is_callable($rule)) {
            // require_once 'Zend/Form/Exception.php';
            throw new Zend_Form_Exception(__CLASS__ . '::' . __METHOD__ . '. Callback function does not exist');
        }
        $this->_formRules[] = $rule;
        return $this;
    }

    public function getHtmlTagOptions()
    {
        $idForm = $this->getAttrib('id');
        if (!empty($idForm)) {
            $htmlTagOptions = ['tag' => 'dl', 'class' => $idForm . '_elements', 'id' => $idForm . '_elements'];
        } else {
            $htmlTagOptions = ['tag' => 'dl', 'class' => 'zend_form'];
        }
        return $htmlTagOptions;
    }

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

        $decorators = $this->getDecorators();
        if (empty($decorators)) {
            $this->addDecorator('FormElements')
                ->addDecorator('HtmlTag', $this->getHtmlTagOptions())
                ->addDecorator('Form')
                ->addDecorator('FormErrors', ['placement' => Zend_Form_Decorator_Errors::PREPEND]);
        }
    }

    /**
     * @return Qs_View
     */
    public function getView()
    {
        if (null === $this->_view) {
            $view = Qs_View::getInstance();
            $this->setView($view);
        }
        return $this->_view;
    }

    public function render(Zend_View_Interface $view = null)
    {
        /*if (null !== $this->_template) {
            $this->initRender();
            $this->removeContainers();
        }*/

        $this->initRender();
        if (null !== $view) {
            $this->setView($view);
        }

        $content = '';

        foreach ($this->getDecorators() as $decorator) {
            /** @var $decorator Zend_Form_Decorator_Abstract */
            $decorator->setElement($this);
            if (method_exists($decorator, 'initRender')) {
                $decorator->initRender();
            }
            $content = $decorator->render($content);
        }
        $this->_addResources();
        return $content;
    }

    public function getElementsOrder()
    {
        return $this->_order;
    }

    public function setAjaxValidation($flag)
    {
        $this->_ajaxValidation = (bool) $flag;
        return $this;
    }

    public function getAjaxValidation()
    {
        return $this->_ajaxValidation;
    }

    public function setIgnoreFiles($flag)
    {
        foreach ($this->getElements() as $element) {
            if ($element instanceof Zend_Form_Element_File) {
                /** @var $element Zend_Form_Element_File */
                $element->setIgnore($flag);
            }
        }
        return $this;
    }

    /**
     * @param $element Zend_Form_Element
     * @return Qs_Form
     */
    protected function _elementInitRender($element)
    {
        foreach ($element->getDecorators() as $decorator) {
            /** @var $decorator Zend_Form_Decorator_Abstract */
            if (method_exists($decorator, 'initRender')) {
                $decorator->setElement($element);
                $decorator->initRender();
            }
        }
        return $this;
    }

    public function setInitializedRender($value = true)
    {
        $this->_initializedRender = (bool) $value;
        return $this;
    }

    public function getInitializedRender()
    {
        return $this->_initializedRender;
    }

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

        $this->_prepareForm($this);

        $belongsTo = $this->getElementsBelongTo();
        foreach ($this as $item) {
            // automatic set enctype multipart
            if (($item instanceof Zend_Form_Element_File)
                || (($item instanceof Zend_Form)
                    && (Zend_Form::ENCTYPE_MULTIPART == $item->getEnctype()))
                || (($item instanceof Zend_Form_DisplayGroup)
                    && (Zend_Form::ENCTYPE_MULTIPART == $item->getAttrib('enctype')))
            ) {
                if ($this instanceof Zend_Form) {
                    $this->setEnctype(Zend_Form::ENCTYPE_MULTIPART);
                } elseif ($this instanceof Zend_Form_DisplayGroup) {
                    $this->setAttrib('enctype', Zend_Form::ENCTYPE_MULTIPART);
                }
            }
            // set belongs
            if ($item instanceof Zend_Form_Element) {
                /** @var $item Zend_Form_Element */
                $item->setBelongsTo($belongsTo);
                if (method_exists($item, 'initRender')) {
                    $item->initRender();
                }
            } else if ($item instanceof Zend_Form) {
                /** @var $item Qs_Form */
                if (!empty($belongsTo)) {
                    if ($item->isArray()) {
                        $name = $this->_mergeBelongsTo($belongsTo, $item->getElementsBelongTo());
                        $item->setElementsBelongTo($name, true);
                    } else {
                        $item->setElementsBelongTo($belongsTo, true);
                    }
                }
            } else if ($item instanceof Zend_Form_DisplayGroup) {
                /** @var Zend_Form_Element $element */
                foreach ($item as $element) {
                    if (!empty($belongsTo)) {
                        $element->setBelongsTo($belongsTo);
                        if (method_exists($element, 'initRender')) {
                            $item->initRender();
                        }
                    }

                    if ($element instanceof Zend_Form_Element_File) {
                        if ($this instanceof Zend_Form) {
                            $this->setEnctype(Zend_Form::ENCTYPE_MULTIPART);
                        } else if ($this instanceof Zend_Form_DisplayGroup) {
                            $this->setAttrib('enctype', Zend_Form::ENCTYPE_MULTIPART);
                        }
                    }

                    $this->_elementInitRender($element);
                }
            }
        }

        if (!$this->_disabledInitRender) {
            //$this->_elementInitRender($this); /* перенесено в render() */
            foreach ($this as $item) {
                if ($item instanceof Zend_Form) {
                    continue;
                }
                $this->_elementInitRender($item);
            }
        }

        $this->setInitializedRender();

        return $this;
    }

    protected function _prepareForm(Qs_Form $form, $belongsTo = [])
    {
        if ($form instanceof Zend_Form && ($_belongsTo = $form->getElementsBelongTo())) {
            if (strpos($_belongsTo, '[')) {
                $_belongsTo .= '[]';
                $parts = explode('[', str_replace(']', '', $_belongsTo));
                $parts = array_filter($parts, 'strlen');
                $belongsTo = array_merge($belongsTo, $parts);
            } else {
                $belongsTo[] = $_belongsTo;
            }
        }
        if ($this->_prependId) {
            $prefix = $form->getPrependString();
            if (!empty($belongsTo)) {
                $prefix .= '-' . implode('-', $belongsTo);
            }
            $form->getDecorator('HtmlTag')->setOption('id', $prefix . '-elements');
        }
        foreach ($form as $item) {
            if ($item instanceof Zend_Form_Element) {
                $this->_prepareElement($item, $belongsTo);
            } else if ($item instanceof Zend_Form) {
                $this->_prepareSubForm($item, $belongsTo);
            } else if ($item instanceof Zend_Form_DisplayGroup) {
                $this->_prepareDisplayGroup($item, $belongsTo);
            }
        }
        return $this;
    }

    public function getDisabledInitRender()
    {
        return $this->_disabledInitRender;
    }

    public function setDisabledInitRender($flag)
    {
        $this->_disabledInitRender = (bool) $flag;
        foreach ($this as $item) {
            if ($item instanceof Zend_Form) {
                /** @var Qs_Form $item */
                $item->setDisabledInitRender($flag);
            }
        }
        return $this;
    }

    /**
     * @param $element Zend_Form_Element
     * @param $belongsTo
     * @return Qs_Form
     */
    protected function _prepareElement($element, $belongsTo)
    {
        if (!$element->getAttrib('class')) {
            $class = $element->getType();
            $class = str_replace('\\', '_', $class);
            if (false !== ($position = strpos($class, 'Form_Element_'))) {
                $class = substr($class, $position + 13);
            }
            $element->setAttrib('class', strtolower($class));
        }
        if ('disabled' === $element->getAttrib('disabled')
            && false === strpos($element->getAttrib('class'), 'disabled')
        ) {
            $element->setAttrib('class', $element->getAttrib('class') . ' disabled');
        }
        if ($this->_prependId) {
            $elementBelongsTo = $element->getBelongsTo();
            if (!empty($belongsTo) && empty($elementBelongsTo)) {
                $elementBelongsTo = $belongsTo;
                $belongsToString = array_shift($elementBelongsTo);
                if (!empty($elementBelongsTo)) {
                    $belongsToString .= '[' . implode('][', $elementBelongsTo) . ']';
                }
                $element->setBelongsTo($belongsToString);
            }
            $element->setAttrib('id', $this->getPrependString() . '-' . $element->getId());
            array_unshift($belongsTo, $this->getPrependString());
        }
        if ($belongsTo) {
            if (($htmlTag = $element->getDecorator('HtmlTag')) && ($id = $htmlTag->getOption('id'))) {
                $htmlTag->setOption('id', implode('-', $belongsTo) . '-' . $element->getName() . '-element');
            }
        }

        return $this;
    }

    protected function _getIdFromName($name)
    {
        $id = $name;
        if (substr($id, -2) == '[]') {
            $id = substr($id, 0, strlen($id) - 2);
        }
        if (strstr($id, ']')) {
            $id = trim($id, ']');
            $id = str_replace('][', '-', $id);
            $id = str_replace('[', '-', $id);
        }

        return $id;
    }

    /**
     * @param $element Zend_Form_Element | Zend_Form
     * @param $belongsTo array
     * @return Qs_Form
     */
    protected function _prepareContainersIds($element, $belongsTo)
    {
        $prefixId = '';
        if ($this->_prependId) {
            $prefixId = $this->getPrependString() . '-';
        }
        if (!empty($belongsTo)) {
            $prefixId .= implode('-', $belongsTo) . '-';
        }
        if (!empty($prefixId)) {
            /** @var $dtDdWrapper Qs_Form_Decorator_DtDdWrapper */
            if (($dtDdWrapper = $element->getDecorator('DtDdWrapper'))) {
                $dtDdWrapper->setDtAttrib('id', $prefixId . $element->getName() . '-label');
                $dtDdWrapper->setDdAttrib('id', $prefixId . $element->getName() . '-element');
            }

            /** @var $fieldSet Zend_Form_Decorator_FieldSet */
            if (($fieldSet = $element->getDecorator('FieldSet'))) {
                $fieldSet->setOption('id', $prefixId . 'fieldset-' . $element->getName());
            }
        }
        return $this;
    }

    /**
     * @param $element Zend_Form_Element
     * @param $belongsTo
     * @return Qs_Form
     */
    protected function _prepareDisplayGroup($element, $belongsTo)
    {
        $this->_prepareContainersIds($element, $belongsTo);

        foreach ($element as $item) {
            if ($item instanceof Zend_Form_Element) {
                $this->_prepareElement($item, $belongsTo);
            } elseif ($item instanceof Zend_Form) {
                $this->_prepareSubForm($item, $belongsTo);
            } elseif ($item instanceof Zend_Form_DisplayGroup) {
                $this->_prepareDisplayGroup($item, $belongsTo);
            }
        }
        return $this;
    }

    /**
     * @param Qs_Form_SubForm $form
     * @param array $belongsTo
     * @return Qs_Form
     */
    protected function _prepareSubForm(Qs_Form_SubForm $form, $belongsTo)
    {
        $form->prependId($this->_prependId);
        $form->setPrependString($this->getPrependString());
        $this->_prepareContainersIds($form, $belongsTo);
        return $this;
    }

    public function setElementRemovableDecorators(array $decorators)
    {
        $this->_elementRemovableDecorators = $decorators;
        return $this;
    }

    public function setGroupRemovableDecorators(array $decorators)
    {
        $this->_groupRemovableDecorators = $decorators;
        return $this;
    }

    public function unsetElementRemovableDecorator($spec)
    {
        return $this->_unsetRemovableDecorator('element', $spec);
    }

    public function unsetGroupRemovableDecorator($spec)
    {
        return $this->_unsetRemovableDecorator('group', $spec);
    }

    protected function _unsetRemovableDecorator($type, $spec)
    {
        $decorators = &$this->{"_{$type}RemovableDecorators"};
        if (is_string($spec)) {
            $spec = [$spec];
        }
        foreach ($spec as $name) {
            if (!is_string($name)) {
                throw new Qs_Form_Exception('Invalid type in decorator name');
            }
            if (false !== ($key = array_search($name, $decorators))) {
                unset($decorators[$key]);
            }
        }
        return $this;
    }

    public function removeContainers()
    {
        $this->removeDecorator('HtmlTag');
        foreach ($this as $item) {
            /** @var $item Qs_Form */
            if ($item instanceof Qs_Form) {
                $item->removeContainers();
                continue;
            } else if ($item instanceof Zend_Form_DisplayGroup) {
                foreach ($this->_groupRemovableDecorators as $name) {
                    $item->removeDecorator($name);
                }
            } else if ($item instanceof Zend_Form_Element) {
                foreach ($this->_elementRemovableDecorators as $name) {
                    $item->removeDecorator($name);
                }
            }
        }
        return $this;
    }

    public function __clone()
    {
        $elements = [];
        foreach ($this->getElements() as $name => $element) {
            $elements[] = clone $element;
        }
        $this->setElements($elements);

        $decorators = [];
        foreach ($this->getDecorators() as $decorator) {
            $decorators[] = clone $decorator;
        }
        $this->setDecorators($decorators);

        $subForms = [];
        foreach ($this->getSubForms() as $name => $subForm) {
            $subForms[$name] = clone $subForm;
        }
        $this->setSubForms($subForms);

        $displayGroups = [];
        foreach ($this->_displayGroups as $group) {
            /** @var Zend_Form_DisplayGroup $clone */
            $clone = clone $group;
            $elements = [];
            foreach ($clone->getElements() as $name => $e) {
                $elements[] = $this->getElement($name);
            }
            $clone->setElements($elements);
            $displayGroups[] = $clone;
        }
        $this->setDisplayGroups($displayGroups);
    }

    public function addGlobalFilter()
    {
        $arguments = func_get_args();
        foreach ($this->getElements() as $element) {
            call_user_func_array([$element, 'addFilter'], $arguments);
        }
        return $this;
    }

    public function setHasButtons($hasButtons)
    {
        $this->_hasButtons = $hasButtons;
        return $this;
    }

    public function getHasButtons()
    {
        return $this->_hasButtons;
    }

    /**
     * Merges given two belongsTo (array notation) strings
     *
     * @param  string $baseBelongsTo
     * @param  string $belongsTo
     * @return string
     */
    protected function _mergeBelongsTo($baseBelongsTo, $belongsTo)
    {
        $endOfArrayName = strpos($belongsTo, '[');

        if ($endOfArrayName === false) {
            return $baseBelongsTo . '[' . $belongsTo . ']';
        }

        $arrayName = substr($belongsTo, 0, $endOfArrayName);

        return $baseBelongsTo . '[' . $arrayName . ']' . substr($belongsTo, $endOfArrayName);
    }

    protected function _initSpamProtection()
    {
        if ($this->_hasSpamProtection) {
            if (self::SPAM_PROTECTION_COOKIE == $this->_spamProtectionType) {
                $this->_initCookieProtection();
            } else {
                $this->_initEmptyFieldProtection();
            }
        }
        return $this;
    }

    protected function _initCookieProtection()
    {
        $cookieUrl = Qs_SiteMap::findFirst(null, ['type' => 'FormCookie\\'], null, 'url');
        if (!$cookieUrl) {
            throw new Qs_Form_Exception('Page for cookie protection is not found!');
        }
        $cookieUrl .= '?form=' . rawurlencode($this->getId());

        /** @var Qs_Doc $doc */
        $doc = Zend_Registry::get('doc');
        $doc->addNonCriticalStylesheet($cookieUrl, ['skipPacking' => true]);

        return $this;
    }

    protected function _initEmptyFieldProtection()
    {
        $field = $this->_spamProtectionField;

        $this->addElement('text', $field['name'], ['label' => $field['label']]);
        $element = $this->getElement($field['name']);

        if (($label = $element->getDecorator('Label'))) {
            /** @var Qs_Form_Decorator_Label $label */
            $label->setTagOption('class', $field['name']);
        }

        if (($htmlTag = $element->getDecorator('HtmlTag'))) {
            /** @var Qs_Form_Decorator_HtmlTag $htmlTag */
            $htmlTag->setOption('class', $field['name']);
        }

        return $this;
    }

    protected function _validateSpamProtection()
    {
        if ($this->_hasSpamProtection) {
            if (self::SPAM_PROTECTION_COOKIE == $this->_spamProtectionType) {
                $method = '_validateCookieProtection';
            } else if (self::SPAM_PROTECTION_EMPTY_FIELD == $this->_spamProtectionType) {
                $method = '_validateEmptyFieldProtection';
            } else {
                throw new Qs_Form_Exception('Unknown spam protections validation method');
            }

            if (!$this->{$method}()) {
                $this->addError($this->_spamProtectionMessage);
                return false;
            }
        }
        return true;
    }

    protected function _validateCookieProtection()
    {
        if (!App\FormCookie\View::getCookie($this->getId())) {
            return false;
        }
        return true;
    }

    protected function _validateEmptyFieldProtection()
    {
        if ('' != Qs_Request::getRequestValue($this->_spamProtectionField['name'])) {
            return false;
        }
        return true;
    }

    /**
     * @return Qs_Doc
     */
    protected function getDoc()
    {
        /** @var Qs_Doc $doc */
        $doc = Zend_Registry::get('doc');
        return $doc;
    }

    protected function _addResources()
    {
        return $this;
    }

    public function addSubForm(Zend_Form $form, $name, $order = null)
    {
        $name = (string) $name;
        foreach ($this->_loaders as $type => $loader) {
            $loaderPaths = $loader->getPaths();
            foreach ($loaderPaths as $prefix => $paths) {
                foreach ($paths as $path) {
                    $form->addPrefixPath($prefix, $path, $type);
                }
            }
        }

        if (!empty($this->_elementPrefixPaths)) {
            foreach ($this->_elementPrefixPaths as $spec) {
                list($prefix, $path, $type) = array_values($spec);
                $form->addElementPrefixPath($prefix, $path, $type);
            }
        }

        if (!empty($this->_displayGroupPrefixPaths)) {
            foreach ($this->_displayGroupPrefixPaths as $spec) {
                list($prefix, $path) = array_values($spec);
                $form->addDisplayGroupPrefixPath($prefix, $path);
            }
        }

        if (null !== $order) {
            $form->setOrder($order);
        }

        if (($oldName = $form->getName()) &&
            $oldName !== $name &&
            $oldName === $form->getElementsBelongTo()
        ) {
            $form->setElementsBelongTo($name);
        }

        $form->setName($name);
        $form->setParentForm($this);
        $this->_subForms[$name] = $form;
        $this->_order[$name] = $order;
        $this->_orderUpdated = true;

        return $this;
    }

    public function setParentForm(Qs_Form $form)
    {
        $this->_parentForm = $form;
        return $this;
    }

    public function hasParentForm()
    {
        return (bool) $this->_parentForm;
    }

    public function getFullId()
    {
        $id = $this->getId();
        if ('' != $id && $this->hasParentForm() && $this->_parentForm->hasParentForm()) {
            $parentId = $this->_parentForm->getFullId();
            if ($parentId) {
                $id = $parentId . '-' . $id;
            }
        }
        return $id;
    }

    public function getFullName()
    {
        $fullName = '';
        $form = $this;
        do {
            $name = $form->getName();
            $form = $form->_parentForm;
            $fullName = (($form && $form->_parentForm) ? '[' . $name . ']' : $name) . $fullName;
        } while ($form);
        return $fullName;
    }
}