<?php

class Qs_Form_Element_ExtendedImage extends Qs_Form_Element_ExtendedFile
{
    protected $_thumbnailWidth = 100;
    protected $_thumbnailHeight = 100;
    protected $_thumbnail;
    protected $_defaultThumbnail;

    public function getResize()
    {
        return $this->getTransferAdapter()->getResize();
    }

    public function setResize($spec)
    {
        $this->getTransferAdapter()->setResize($spec);
        return $this;
    }

    public function setThumbnailWidth($width)
    {
        $this->_thumbnailWidth = (int) $width;
        return $this;
    }

    public function setThumbnailHeight($height)
    {
        $this->_thumbnailHeight = (int) $height;
        return $this;
    }

    public function loadDefaultDecorators()
    {
        if ($this->loadDefaultDecoratorsIsDisabled()) {
            return $this;
        }
        $decorators = $this->getDecorators();
        if (empty($decorators)) {
            $this->addDecorator('ExtendedImage')
                 ->addDecorator('Errors')
                 ->addDecorator('Description')
                 ->addDecorator('HtmlTag', array('tag' => 'dd', 'id'  => $this->getName() . '-element'))
                 ->addDecorator('Label', array('tag' => 'dt'));
        }
        return $this;
    }

    public function getDownloadUrl($value = null)
    {
        if (null === $this->_downloadUrl) {
            if (null === $value) {
                $value = $this->getValue();
            }
            $file = $this->getTransferAdapter()->getDestination($this->getName()) . '/' . $value;
            $file = str_replace(WWW_PATH . '/' . Qs_ImageFs::WEB_PATH . '/', '', $file);
            $this->_downloadUrl = BASE_URL . '/' . Qs_ImageFs::get($file);
        }
        return $this->_downloadUrl;
    }

    public function getThumbnail()
    {
        if (null === $this->_thumbnail) {
            $file = $this->getTransferAdapter()->getDestination($this->getName()) . '/' . $this->getValue();
            $file = str_replace(WWW_PATH . '/' . Qs_ImageFs::WEB_PATH . '/', '', $file);
            $this->_thumbnail = Qs_ImageFs::get($file, $this->_thumbnailWidth, $this->_thumbnailHeight);
        }
        return $this->_thumbnail;
    }

    public function isValid($value, $context = null)
    {
        $this->getValidators(); // autoinsert IsImage validator
        return parent::isValid($value, $context);
    }

    public function getValidators()
    {
        if (null == $this->getValidator('IsImage')) {
            $this->addValidator('File_IsImage', true);
        }
        return parent::getValidators();
    }

    public function setDefaultThumbnail($thumbnail)
    {
        $path = WWW_PATH . '/' . $thumbnail;
        if (!file_exists($thumbnail) && is_file($path)) {
            throw new Qs_Exception('File "' . $thumbnail . '" does not exist');
        }
        $this->_defaultThumbnail = $thumbnail;
        return $this;
    }

    public function getDefaultThumbnail()
    {
        if ($this->_defaultThumbnail) {
            return Qs_ImageFs::get($this->_defaultThumbnail, $this->_thumbnailWidth, $this->_thumbnailHeight);
        }
        return false;
    }
}