<?php

class Qs_Form_Decorator_Grid extends Zend_Form_Decorator_HtmlTag
{
    protected $_texts = array(
        'add'    => 'add',
        'delete' => 'delete',
        'up'     => 'up',
        'down'   => 'down',
        'row'    => 'row',
    );
    protected $_placement = 'APPEND';
    protected $_tag = 'table';
    protected $_tagRow = 'tr';
    protected $_tagCell = 'td';
    protected $_tagBody = 'tbody';
    protected $_tagHead = 'thead';
    protected $_tagHeaderCell = 'th';
    protected $_tagFoot = 'tfoot';
    protected $_view;
    protected $_elementName;
    protected $_options;
    protected $_columns;

    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;
    }

    function __call($name, $args)
    {
        $prefix = substr($name, 0, 3);
        if (in_array($prefix, array('set', 'get')) && substr($name, -3) == 'Tag') {
            $property = '_tag' . substr($name, 3, -3);
            if (property_exists($this, $property)) {
                if ($prefix == 'get') {
                    return $this->$property;
                } elseif ($prefix == 'set') {
                    $this->$property = $args[0];
                    return $this;
                }
            }
        }
        $debugData = debug_backtrace();
        echo "<span style=\"color:red;\"><b>Fatal error</b>: Call to undefined method "
            . get_class($this) . ": $name() in <b>{$debugData[1]['file']}</b> on line "
            . "<b>{$debugData[1]['line']}</b></span>";
        exit;
    }

    public function getOptions()
    {
        if (null === $this->_options) {
            $this->_options = Qs_Array::exclude($this->getElement()->getAttribs(), 'helper');

        }
        return $this->_options;
    }

    public function initRender()
    {
        $doc = Zend_Registry::get('doc');
        $doc->addScript('js/lib/form-element-grid.js')
            ->addInitFunction('Qs_Form_Element_Grid.init', array($this->getElement()->getId(), $this->_getScriptOptions()));
        return $this;
    }

    public function render($content)
    {
        $element = $this->getElement();
        $this->_columns = $element->getColumns();
        $this->_view    = $element->getView();
        if (null === $this->_view) {
            return $content;
        }

        if (empty($this->_columns)) {
            throw new Qs_Form_Decorator_Exception('Columns is not defined');
        }
        $this->_elementName = $element->getFullyQualifiedName();
        $values = $element->getValue();

        $tag       = $this->getTag();
        $placement = $this->getPlacement();
        $noAttribs = $this->getOption('noAttribs');
        $separator = $this->getOption('separator');
        $id        = $element->getId();

        $attribs = array();
        if (!$noAttribs) {
            $attribs = $this->getOptions();
        }
        if (!isset($attribs['class'])) {
            $attribs['class'] = 'grid';
        }
        $attribs['id'] = $id;
        $grid = $this->_getOpenTag($tag, $attribs)
              . $this->_renderColumns($values)
              . $this->_getCloseTag($tag);
        switch ($placement) {
            case self::APPEND:
                return $content . $separator . $grid;
            case self::PREPEND:
                return $grid . $separator . $content;
        }
    }

    protected function _getScriptOptions()
    {
        $options = array(
            'columns'       => $this->getElement()->getColumns(),
            'name'          => $this->getElement()->getFullyQualifiedName(),
            'autoIncrement' => max(count($this->getElement()->getValue()), 1),
            'sortable'      => $this->getElement()->isSortable(),
        );
        if (!($itemName = $this->getOption('itemName'))) {
            $itemName = 'row';
        }
        $options['itemName'] = $this->_getText($itemName);
        return $options;
    }

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

    protected function _renderColumns($values = null)
    {
        $content = '';
        $attribs = $this->getOption('rowAttribs');
        $noHeader = $this->getOption('noHeader');
        $tag = $this->getRowTag();
        $headerCellTag = $this->getHeaderCellTag();

        // Header
        if (!$noHeader) {
            $content .= $this->_getOpenTag($this->getHeadTag());
            $content .= $this->_getOpenTag($tag, $attribs);
            foreach ($this->_columns as $name => $options) {
                $attribs = array();
                if (isset($options['attribs'])) {
                    $attribs = $options['attribs'];
                }
                if (isset($options['title'])) {
                    $content .= $this->_getOpenTag($headerCellTag, $attribs)
                              . $options['title']
                              . $this->_getCloseTag($headerCellTag);
                }
            }
            $content .= $this->_getCloseTag($tag);
            $content .= $this->_getCloseTag($this->getHeadTag());
        }
        $content .= $this->_renderFooter();
        $content .= $this->_getOpenTag($this->getBodyTag());
        if (empty($values)) {
            $values = array(array_fill_keys(array_keys(Qs_Array::exclude($this->_columns, '_options')), ''));
        }
        // Rows
        $index = 0;

        foreach ($values as $rowValues) {
            $content .= $this->_getOpenTag($tag, $attribs);
            foreach ($this->_columns as $name => $options) {
                $value = (array_key_exists($name, $rowValues)) ? $rowValues[$name] : null ;
                $this->_prepareCellOptions($name, $value, $options);
                $name = str_replace('[]', '[' . $index .']', $this->_elementName) . '[' . $name . ']';
                $content .= $this->_renderCell($name, $options);
            }
            $content .= $this->_getCloseTag($tag);
            $index++;
        }
        $content .= $this->_getCloseTag($this->getBodyTag());
        return $content;
    }

    protected function _prepareCellOptions($name, $value, &$options)
    {
        $options['value'] = (is_array($value)) ? $value['value'] : $value;
        $options['shortName'] = $name;
        if (is_array($value)) {
            if (isset($value['label'])) {
                $options['label'] = $value['label'];
            }
        }
    }

    protected function _getId($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;
    }

    protected function _renderInput($type, $name, $value, $label, $attribs = array(), $options = array())
    {
        if (!isset($attribs['class'])) {
            $attribs['class'] = $type;
        }
        $description = '';
        if (isset($attribs['description'])) {
            $description = $attribs['description'];
            unset($attribs['description']);
        }
        $content = $this->_getOpenTag('span', array('id' => $this->_getId($name) . '-label'))
                 . htmlspecialchars($label) . ' '
                 . $this->_getCloseTag('span')
                 . $this->_view->{'form' . ucfirst($type)}($name, $value, $attribs, $options);
        if ($description) {
            $content .= $description;
        }
        return $content;
    }

    protected function _renderCell($name, array $options)
    {
        $id = $this->getElement()->getId();
        $tag = $this->getCellTag();
        $label = '';
        $value = '';
        $cellAttribs = array('class' => str_replace('-', '_', $id) . '_' . $options['shortName'] );
        $elementAttribs = array();
        foreach ($options as $optionName => $optionValue) {
            if (in_array($name, array('class', 'style', 'description'))) {
                $elementAttribs[$optionName] = $optionValue;
            }
        }
        extract($options);
        switch ($type) {
            case 'text':
            case 'hidden':
                $content = $this->_renderInput($type, $name, $value, $label, $elementAttribs);
                break;
            case 'options':
                $content = '';
                if ($this->getElement()->isSortable()) {
                    $content .= '<a class="up" href="#" onclick = "return Qs_Form_Element_Grid.up(this, \'' . $id . '\');">'
                                . $this->_getText('up') . '</a><span> | </span>';
                    $content .= '<a class="down" href="#" onclick = "return Qs_Form_Element_Grid.down(this, \'' . $id . '\');">'
                               . $this->_getText('down') . '</a><span> | </span>';
                }
                $content .= '<a class="del" href="#" onclick = "return Qs_Form_Element_Grid.del(this, \'' . $id . '\');">'
                          . $this->_getText('delete') . '</a>';
                break;
            case 'select':
                $content = $this->_renderInput($type, $name, $value, $label, array(), $multiOptions);
                break;
            default:
                $content = '';
        }

        if ($tag) {
            $content = $this->_getOpenTag($tag, $cellAttribs)
                     . $content
                     . $this->_getCloseTag($tag);
        }
        return $content;
    }

    protected function _renderAddLink()
    {
        $id = $this->getElement()->getId();
        $content = $this->_getOpenTag(
            'a',
            array(
                'id'      => $id . '-add',
                'onclick' => "return Qs_Form_Element_Grid.add('{$id}');",
                'href'    => '#'
            )
        );
        if (!($itemName = $this->getOption('itemName'))) {
            $itemName = 'row';
        }
        $content .= $this->_getText('add') . ' ' . $itemName;
        $content .= $this->_getCloseTag('a');
        return $content;
    }

    public function setText($field, $value)
    {
        $this->_texts[$field] = $value;
    }

    protected function _getText($text)
    {
        if (isset($this->_texts[$text])) {
            $text = $this->_texts[$text];
        }
        if ($translator = $this->getElement()->getTranslator()) {
            return $translator->translate($text);
        }
        return $text;
    }

    protected function _renderElement($type, $arguments)
    {
        $helperName = 'form' . ucfirst($type);
        if ($helper = $this->_view->getHelper($helperName)) {
            return call_user_func_array(array($helper, $helperName), $arguments);
        }
        throw new Qs_Form_Decorator_Exception('Unsupported element type: ' . $type);
    }

    protected function _renderFooterCells()
    {
        $content = '';
        $colspan = count($this->_columns);
        foreach ($this->_columns as $name => $column) {
            if (isset($column['valueFrom'])) {
                if ($options = $this->getElement()->getSourceElement($column['valueFrom'])) {
                    $content .= $this->_getOpenTag($this->getCellTag())
                              . $this->_renderElement($options['type'], $options['arguments'])
                              . $this->_getCloseTag($this->getCellTag());
                    $colspan--;
                }
            }
        }
        $content .= $this->_getOpenTag($this->getCellTag(), array('colspan' => $colspan))
                  . $this->_renderAddLink()
                  . $this->_getCloseTag($this->getCellTag());
        return $content;
    }

    protected function _renderFooter()
    {
        $content = $this->_getOpenTag($this->getFootTag())
                 . $this->_getOpenTag($this->getRowTag())
                 . $this->_renderFooterCells()
                 . $this->_getCloseTag($this->getRowTag())
                 . $this->_getCloseTag($this->getFootTag());
        return $content;
    }
}