<?php

class Qs_Form_Decorator_MultiFile extends Zend_Form_Decorator_File
{
    protected $_rowIndex = 0;
    
    public function initRender()
    {
        $doc = Zend_Registry::get('doc');
        $doc->addScript('js/lib/form-element-multifile.js')
            ->addInitFunction('Qs_Form_Element_MultiFile.init', array($this->getElement()->getId(), $this->_getScriptOptions()));
        return $this;
    }
    
    public function render($content)
    {
        $element = $this->getElement();
        if (!$element instanceof Zend_Form_Element) {
            return $content;
        }

        $view = $element->getView();
        if (!$view instanceof Zend_View_Interface) {
            return $content;
        }

        $name      = $element->getName();
        $id        = $element->getId();
        $attribs   = $this->getAttribs();
        if (!array_key_exists('id', $attribs)) {
            $attribs['id'] = $name;
        }

        $separator = $this->getSeparator();
        $placement = $this->getPlacement();
        $markup    = array();
        $size      = $element->getMaxFileSize();
        if ($size > 0) {
            $element->setMaxFileSize(0);
            $markup[] = $view->formHidden('MAX_FILE_SIZE', $size);
        }

        if (Zend_File_Transfer_Adapter_Http::isApcAvailable()) {
            $markup[] = $view->formHidden('APC_UPLOAD_PROGRESS', uniqid(), array('id' => 'progress_key'));
        } else if (Zend_File_Transfer_Adapter_Http::isUploadProgressAvailable()) {
            $markup[] = $view->formHidden('UPLOAD_IDENTIFIER', uniqid(), array('id' => 'progress_key'));
        }

        if ($element->isArray()) {
            $multiValues = $this->_getMultiValues();
            $name .= "[]";
            $_content = '<table id="' . $element->getId() . '" class="linear_grid">';
            $_content .= '<thead>'
                      . '<tr>'
                      . '<th id="' . $element->getId() . '-th-file">File</th>' 
                      . '<th id="' . $element->getId() . '-th-size">Size</th>' 
                      . '<th id="' . $element->getId() . '-th-options">Options</th>' 
                      . '</tr>'
                      . '</thead>';
            if (empty($multiValues)) {
                $_content .= $this->_renderRow($name, $attribs);
            } else {
                $uploadedSize = 0;
                foreach ($multiValues as $file) {
                    $uploadedSize += $file['size'];
                }
                $_content .= '<tfoot>'
                            . '<tr>'
                            . '<td class="file">Uploaded Total File(s) Size: </td>' 
                            . '<td class="size" nowrap="nowrap">' . Qs_Math::sizeToByteString($uploadedSize) . '</td>'
                            . '<td></td>'
                            . '</tr>'
                            . '</tfoot>';
                $_content .= '<tbody>';
                foreach ($multiValues as $value) {
                    $_content .= $this->_renderRow($name, $attribs, $value);
                }
            }
            $_content .= '</tbody></table>' . $this->_renderAddLink();
        } else {
            $markup[] = $view->formFile($name, $attribs);
            $_content = implode($separator, $markup);
        }

        switch ($placement) {
            case self::PREPEND:
                return $_content . $separator . $content;
            case self::APPEND:
            default:
                return $content . $separator . $_content;
        }
    }
    
    protected function _getMultiValues()
    {
        $multiValues = $this->getElement()->getValue();
        if (empty($multiValues) || !is_array($multiValues)) {
            $multiValues = array(); 
            return $multiValues;
        }
        foreach ($multiValues as $index => $value) {
            if (is_string($value)) {
                $dir = $this->getElement()->getDestination($this->getElement()->getName());
                if (is_array($dir)) {
                    $dir = current($dir);
                }
                $fileName = $dir . '/' . $value;
                $file = array(
                    'name'  => $value,
                    'title' => preg_replace('/(.*)(\(\d+\)o?)(\.[^\.]+)$/', '$1$3', $value),
                    'size'  => filesize($fileName),
                );
                $multiValues[$index] = $file;
            }
        }
        return $multiValues;
    }
    
    protected function _renderRow($name, $attribs, $value = null)
    {
        $_attribs = $attribs;
        $_attribs['id'] = $attribs['id']. '-' . $this->_rowIndex++;
        $view = $this->getElement()->getView();
        $content = '<tr>'
                 . '<td class="file">';
        if (null === $value) {
            $content .= $view->formFile($name, $_attribs);
            $content .= '<td class="size"></td>';
        } else {
            $content .= $view->formHidden($name, $value['name'])
                      . '<a target="_blank" href="' . $this->getElement()->getDownloadUrl($value['name']) . '">'
                      . htmlspecialchars($value['title']) 
                      . '</a>';
            $content .= '<td class="size">' 
                      . (($value['size']) ? Qs_Math::sizeToByteString($value['size']) : '') 
                      . '</td>';
        }
        $content .= '</td>'
                  . '<td class="options">' . $this->_renderOptions() . '</td>'
                  . '</tr>';
        return $content;
    }
    
    protected function _renderOptions()
    {
        $id = $this->getElement()->getId();
        $content = $this->_renderLink(
            'delete', 
            array(
                'class'   => 'del',
                'href'    => '#',
                'onclick' => 'return Qs_Form_Element_MultiFile.del(this, \'' . $id . '\');'
            )
        );
        return $content;
    }
    
    protected function _renderLink($text, $attribs, $separator = '')
    {
        $content = $this->_getOpenTag('a', $attribs)
                 . $this->_getText($text)
                 . $this->_getCloseTag('a')
                 . '<span>' . $separator . '</span>';
        return $content;
    }
    
    protected function _getOpenTag($tag, array $attribs = null)
    {
        $html = '<' . $tag;
        if (null !== $attribs) {
            $html .= $this->_htmlAttribs($attribs);
        }
        $html .= '>';
        return $html;
    }
    
    protected function _getCloseTag($tag)
    {
        return '</' . $tag . '>';
    }
    
    protected function _htmlAttribs(array $attribs)
    {
        $xhtml = '';
        foreach ((array) $attribs as $key => $val) {
            $key = htmlspecialchars($key, ENT_COMPAT, 'UTF-8');
            if (is_array($val)) {
                $val = implode(' ', $val);
            }
            $val    = htmlspecialchars($val, ENT_COMPAT, 'UTF-8');
            $xhtml .= " $key=\"$val\"";
        }
        return $xhtml;
    }
    
    protected function _renderScriptOptions()
    {
        $options = $this->_getScriptOptions();
        return json_encode($options);
    }
    
    protected function _renderAddLink($hidden = false)
    {
        $id = $this->getElement()->getId();
        $attribs = array(
            'id'      => $id . '-add', 
            'class'   => 'btn',
            'onclick' => "return Qs_Form_Element_MultiFile.add('{$id}')", 
            'href'    => '#'
        );
        if ($hidden) {
            $attribs['style'] = 'display:none;';
        }
        $content = $this->_getOpenTag('a', $attribs);
        $content .= $this->_getText('Add File');
        $content .= $this->_getCloseTag('a');
        return $content;
    }
    
    protected function _getScriptOptions()
    {
        $options = array(
            'name'     => $this->getElement()->getFullyQualifiedName(),
            'required' => $this->getElement()->isRequired(),
        );
        $options['itemName'] = $this->_getText('file');
        return $options;
    }
    
    protected function _getText($text)
    {
        if ($translator = $this->getElement()->getTranslator()) {
            return $translator->translate($text);
        }
        return $text;
    }
}