<?php

class Qs_Form_Decorator_JQuery_Datepicker extends Zend_Form_Decorator_HtmlTag
{
    protected $_placement = 'APPEND';
    protected $_options;

    public function getOptions()
    {
        if (null === $this->_options) {
            $this->_options = Qs_Array::exclude($this->getElement()->getAttribs(), 'helper', 'options');
        }
        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()
    {
        $doc = Zend_Registry::get('doc');
        $doc->addScript('js/jquery-ui.js')
            ->addScript('js/jquery-qtip.js')
            ->addScript('js/jquery-qtip-extended.js')
            ->addScript('js/lib/form-element-date.js')
            ->addStylesheet('css/thirdpart/jquery-ui.css');
        $id = $this->getElement()->getId();
        $doc->addInitFunction('Qs_Form_Element_Date.init', array($id, $this->_getScriptOptions(), $this->_getQtipOptions()));
        $value = $this->getElement()->getValue();
        $date = strtotime($value);
        if ($date) {
            $doc->addInitFunction(
                'Qs_Form_Element_Date.callMethod',
                array(
                    $id,
                    'setDate',
                    new Zend_Json_Expr('new Date(' . date('Y', $date) . ', ' . (date('n', $date) - 1)
                                       . ', ' . date('j', $date) . ')')
                )
            );
        }
        return $this;
    }

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

        $tag       = $this->getTag();
        $element   = $this->getElement();
        $id        = $element->getId();
        $view      = $element->getView();
        $placement = $this->getPlacement();
        $separator = $this->getSeparator();

        $name = $element->getFullyQualifiedName();
        $elementContent = $view->formHidden($name, $element->getValue(), array('id' => $id));
        if (false !== ($pos = strrpos($name, '['))) {
            $pos++;
            $_name = substr($name, 0, $pos) . '_' . substr($name, $pos);
        } else {
            $_name = '_' . $name;
        }
        if (false !== ($pos = strrpos($id, '-'))) {
            $pos++;
            $_id = substr($id, 0, $pos) . '_' . substr($id, $pos);
        } else {
            $_id = '_' . $id;
        }
        $elementContent .= $view->formText($_name, '', array('class' => 'date', 'id' => $_id));

        switch ($placement) {
            case self::APPEND:
                return $content . $separator . $elementContent;
            case self::PREPEND:
                return $elementContent . $separator . $content;
        }
    }

    protected function _renderScriptOptions()
    {
        $options = $this->_getScriptOptions();
        return json_encode($options);
    }

    protected function _getQtipOptions()
    {
        $qtipOptions = Qs_Array::get($this->getOptions(), 'qtip');
        return $qtipOptions;
    }

    protected function _getScriptOptions()
    {
        $options = array(
            'altField'        => '#' . $this->getElement()->getId(),
            'altFormat'       => 'yy-mm-dd',
            'dateFormat'      => $this->getElement()->getFormat(),
            'duration'        => 0,
            'changeMonth'     => true,
            'changeYear'      => true,
            'showOn'          => 'button',
            'buttonImage'     => 'images/calendar.gif',
            'buttonText'      => 'Click to open/close Calendar',
            'buttonImageOnly' => true
        );
        $allowedOptions = array(
            'altField',
            'altFormat',
            'appendText',
            'buttonImage',
            'buttonImageOnly',
            'buttonText',
            'changeMonth',
            'changeYear',
            'closeText',
            'constrainInput',
            'currentText',
            'dateFormat',
            'dayNames',
            'dayNamesMin',
            'dayNamesShort',
            'defaultDate',
            'duration',
            'firstDay',
            'gotoCurrent',
            'hideIfNoPrevNext',
            'isRTL',
            'maxDate',
            'minDate',
            'monthNames',
            'monthNamesShort',
            'navigationAsDateFormat',
            'nextText',
            'numberOfMonths',
            'prevText',
            'shortYearCutoff',
            'showAnim',
            'showButtonPanel',
            'showCurrentAtPos',
            'showMonthAfterYear',
            'showOn',
            'showOptions',
            'showOtherMonths',
            'stepMonths',
            'yearRange',
        );

        foreach ($this->getOptions() as $name => $value) {
            if (false !== array_search($name, $allowedOptions)) {
                $options[$name] = $value;
            }
        }

        return $options;
    }
}