<?php
/**
 * @method Qs_Form_Element_Autocomplete getElement()
 */
class Qs_Form_Decorator_JQuery_Autocomplete extends Zend_Form_Decorator_HtmlTag
{
    protected $_placement = 'APPEND';
    protected $_options;

    public function getOptions()
    {
        if (null === $this->_options) {
            $this->_options = Qs_Array::excludeKey($this->getElement()->getAttribs(), 'helper', 'options', 'class');
        }
        return $this->_options;
    }

    public function setOptions(array $options)
    {
        if (isset($options['options'])) {
            unset($options['options']);
        }
        foreach ($options as $key => $value) {
            $method = 'set' . ucfirst($key);
            if (method_exists($this, $method)) {
                $this->$method($value);
            } else {
                $this->_options[$key] = $value;
            }
        }
        return $this;
    }

    public function initRender()
    {
        /** @var $doc Qs_Doc */
        $doc = Zend_Registry::get('doc');
        $doc->addScript('js/jquery-ui.js')
            ->addScript('js/lib/form-element-autocomplete.js')
            ->addStylesheet('css/thirdpart/jquery-ui.css');
        $doc->addInitObject('Qs_Form_Element_Autocomplete', array($this->_getScriptOptions()));
        return $this;
    }

    public function render($content)
    {
         // init options
        $this->getOptions();

        $tag       = $this->getTag();
        $element   = $this->getElement();
        $id        = $element->getId();
        $_id       = $element->getDisplayId();
        $__id      = $element->getTitleId();
        $view      = $element->getView();
        $placement = $this->getPlacement();
        $separator = $this->getSeparator();
        $value     = $element->getValue();
        $_value    = $element->getTitle();
        $__value   = $_value; // the values are same for title and display fields

        $name = $element->getFullyQualifiedName();
        $_name = $element->getFullyQualifiedDisplayName();
        $__name = $element->getFullyQualifiedTitleName();
        $elementContent = $view->formHidden($name, $value, array('id' => $id));

        // The element below required for validation
        $attribs = $this->getElementAttribs();
        $attribs['id'] =  $_id;
        $elementContent .= $view->formText($_name, $_value,  $attribs);
        $elementContent .= $view->formHidden($__name, $__value, array('id' => $__id));

        switch ($placement) {
            case self::PREPEND:
                return $elementContent . $separator . $content;
            case self::APPEND:
                // break intentionally omitted
            default:
                return $content . $separator . $elementContent;
        }
    }

    public function getElementAttribs()
    {
        if (null === ($element = $this->getElement())) {
            return null;
        }
        $attribs = Qs_Array::excludeKey($this->getElement()->getAttribs(), 'helper', 'options');

        if (isset($attribs['id'])) {
            return $attribs;
        }

        $id = $element->getName();

        if ($element instanceof Zend_Form_Element) {
            if (null !== ($belongsTo = $element->getBelongsTo())) {
                $belongsTo = preg_replace('/\[([^\]]+)\]/', '-$1', $belongsTo);
                $id = $belongsTo . '-' . $id;
            }
        }

        $element->setAttrib('id', $id);
        $attribs['id'] = $id;

        return $attribs;
    }

    protected function _getScriptOptions()
    {
        $options = (array) $this->getOptions();

        $element = $this->getElement();
        if (($tmp = $element->getDataUrl())) {
            $options['dataUrl'] = $tmp;
        } elseif (($tmp = $element->getDataCallback())) {
            $options['dataCallback'] = $tmp;
        } elseif (($tmp = $element->getDataArray())) {
            $options['dataArray'] = $tmp;
        } else {
            $tmp = $this->getElement()->getMultiOptions();
            $options['dataArray'] = array();
            foreach ($tmp as $value => $title) {
                $options['dataArray'][] = array('value' => $value, 'title' => $title);
            }
        }

        $options['valueElementId'] = $element->getId();
        $options['displayElementId'] = $element->getDisplayId();
        $options['titleElementId'] = $element->getTitleId();

        return $options;
    }
}