<?php

/**
 * @method array getFileName()
 */

class Qs_Form_Element_ExtendedFile extends Zend_Form_Element_File
{
    protected $_downloadUrl;
    protected $_oldValue;
    protected $_ignore = false;

    /**
     * @return Qs_File_Transfer_Adapter_Db
     */
    public function getTransferAdapter()
    {
        if (null === $this->_adapter) {
            $this->setTransferAdapter(new Qs_File_Transfer_Adapter_Db());
        }
        return $this->_adapter;
    }

    public function getValue()
    {
        if (!is_null($this->_value)) {
            return $this->_value;
        }

        if ($value = $this->getOldValue()) {
            $this->setValue($value);
            return $this->_value;
        }

        if (!$this->isValid(null)) {
            return null;
        }

        if (!$this->receive()) {
            return null;
        }

        $content = $this->getTransferAdapter()->getFileName($this->getName());
        if (empty($content)) {
            return null;
        }

        $filenames = $this->getFileName();
        if (count($filenames) == 1) {
            $this->_value = basename($filenames);
            return $this->_value;
        }

        $this->_value = array();
        foreach($filenames as $filename) {
            $this->_value[] = basename($filename);
        }

        return $this->_value;
    }

    public function setValue($value)
    {
        return $this->_value = $value;
    }

    /**
     * @param string $value
     * @return string
     */
    public function getDownloadUrl($value = null)
    {
        if (null !== $this->_downloadUrl) {
            return $this->_downloadUrl;
        }
        if (null === $value) {
            $value = $this->getValue();
        }
        $fullFileName = $this->getTransferAdapter()->getDestination($this->getName()) . '/' . rawurlencode($value);
        $this->_downloadUrl = str_replace(WWW_PATH, BASE_URL, $fullFileName);
        return $this->_downloadUrl;
    }

    public function addErrorMessage($message)
    {
        $this->_errorMessages[] = (string) $message;
        return $this;
    }

    protected function _saveSession($value)
    {
        $session = new Qs_Session_Namespace(CURRENT_PAGE);
        if (!isset($session->files)) {
            $session->files = array();
        }
        $session->files[$value] = $this->getName();
        return $this;
    }

    public function isValid($value, $context = null)
    {
        $isValid = parent::isValid($value, $context);
        if (is_array($context)) {
            $name = $this->getName();
            
            $del = isset($context[$name]['del']);
            $isOldFile = (isset($context[$name]['oldFile']) && !empty($context[$name]['oldFile']));
            $isNewFile = $this->getTransferAdapter()->isUploaded($this->getName());
            if ($this->isRequired()) {
                if ($isOldFile) {
                    if ($isNewFile && $isValid) {
                        $this->_saveSession($context[$name]['oldFile']);
                    } else {
                        $this->setOldValue($context[$name]['oldFile']);
                        if ($del) {
                            // message
                            $this->getTransferAdapter()->addError('File is required');
                            return false;
                        }
                    }
                } else {
                    if (!$isNewFile) {
                        // message
                        $this->getTransferAdapter()->addError('File is required');
                        return false;
                    }
                }
            } else {
                if ($del && $isOldFile && $isValid || $isOldFile && $isNewFile && $isValid) {
                    $this->_saveSession($context[$name]['oldFile']);
                } else {
                    $this->setOldValue(isset($context[$name]['oldFile']) ? $context[$name]['oldFile'] : null);
                }
            }
            if ($isNewFile) {
                //$isValid = parent::isValid($value, $context);
                if (!$isValid && isset($context[$name]['oldFile'])) {
                    $this->setOldValue($context[$name]['oldFile']);
                }
                return $isValid;
            }

            /** ігноруємо всі помилки навіть якщо вони були */
            $this->getTransferAdapter()->setMessages(array());

            return true;
        }
        return $isValid;
    }

    public function getOldValue()
    {
        return $this->_oldValue;
    }

    public function setOldValue($value)
    {
        // Set old value only if it not already set.
        if (null === $this->_oldValue && !empty($value)) {
            $this->_oldValue = $value;
        }
        return $this;
    }

    public function loadDefaultDecorators()
    {
        if ($this->loadDefaultDecoratorsIsDisabled()) {
            return $this;
        }

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

        return $this;
    }
}