<?php
/**
 * Documentation
 * @author keeper, djes
 * @category
 * @package
 * @subpackage
 * @copyright  Copyright (c) 2005-2011 ITCrimea Ukraine Inc. (http://www.itcrimea.com)
 * @license
 */
class Image extends System_Db_Object
{
    
    const EXTERNAL_MONGODB = 1;

    /**
    * predelete - remove all thumbnails
    * @todo finish
    * @author keeper, djes
    * @return mixed
    */
    protected function _delete()
    {
    	$path_to_file = Zend_Registry::get('AppFolder').$this->Path.$this->File;
    	if (is_file($path_to_file)){
            unlink($path_to_file);
    	}
    	$this->deleteThumbs();
    }
    
    public function deleteThumbs()
    {
        $listThumbs = $this->findDependentRowset('Image_Thumb_Table');
    	foreach ($listThumbs as $objectThumb){
            $objectThumb->delete();
    	}
    }


    /**
    * calculate (based on image ID) and returns the image path
    * @author keeper
    * @return string
    */
    function getPath()
    {
    	$strPath = floor($this->ID / 100) * 100;
        $strPath = str_pad($strPath, 8, '0', STR_PAD_LEFT);
        $config = System_Components::getComponentConfig('Image');
        return $config->Image->Path . $strPath . '/';
    }

    /**
    * returns the temporary image path
    * @author keeper
    * @return string
    */
    public static function getPathTemp($Absolute=true)
    {
        $config = System_Components::getComponentConfig('Image');
        if (!$Absolute) return $config->Image->PathTemp;
        return Zend_Registry::get('AppFolder').$config->Image->PathTemp;
    }
    
    /**
     * get list of assigns components
     * @author keeper
     * @return array
     */
    function getAssignsList()
    {
        $config = System_Components::getComponentConfig('Image');
        return $config->Image->Assigns;
    }

    /**
     * Calculate the thumbnail size based on requested params
     * @author keeper
     * @param int $Width
     * @param int $Height
     * @param int $WidthMax
     * @param int $HeightMax
     * @return array
     */
    function calcThumbParams($Width=0, $Height=0, $WidthMax=0, $HeightMax=0)
    {
        $x = 0;
        $y = 0;
        if ($Width > 0 && !$Height) {
            $koef = $Width/$this->Width;
            $Height = round($koef * $this->Height);
            if ($HeightMax > 0 && $Height > $HeightMax) {
                $Height = $HeightMax;
                //$Width = round($this->Width * $Height/$this->Height);
                $y = ceil( ($this->Height - ceil($Height/$koef) ) / 2 );
                $this->Height = ceil($Height/$koef);
            }
        } elseif (!$Width && $Height>0) {
            $koef = $Height/$this->Height;
            $Width = round($koef * $this->Width);
            if ($WidthMax > 0 && $Width > $WidthMax) {
                $Width = $WidthMax;
                //$Height = round($this->Height * $Width/$this->Width);
                $x = ceil( ($this->Width - ceil($Width/$koef) ) / 2 );
                $this->Width = ceil($Width/$koef);
            }
        } elseif ($Width>0 && $Height>0) {
            $koef = max($Width/$this->Width, $Height/$this->Height);
            if (ceil($Width/$koef) < $this->Width) {
                $x = ceil( ($this->Width - ceil($Width/$koef) ) / 2 );
                $this->Width = ceil($Width/$koef);
            }
            if (ceil($Height/$koef) < $this->Height) {
                $y = ceil( ($this->Height - ceil($Height/$koef) ) / 2 );
                $this->Height = ceil($Height/$koef);
            }
        } elseif ($WidthMax > 0 || $HeightMax > 0) {
            if ($WidthMax >= $this->Width && $HeightMax >= $this->Height) {
                $Height = $this->Height;
                $Width = $this->Width;
            } else {
                if (!$HeightMax) $HeightMax = $this->Height;
                if (!$WidthMax) $WidthMax = $this->Width;
                $koef = min($WidthMax/$this->Width, $HeightMax/$this->Height);
                $Height = round($koef * $this->Height) ;
                $Width = round($koef * $this->Width) ;
            }
        } else {
            $Height = $this->Height;
            $Width = $this->Width;
        }
        return $arrThumbParams = array('Width'=>$Width, 'Height'=>$Height, 'X'=>$x, 'Y'=>$y);
    }

    /**
     * generate thumbnail filename based on original image name and thumbnail size
     * @author keeper
     * @param int $Width
     * @param int $Height
     * @return string
     */
    function getThumbName($Width, $Height)
    {
        $Name = substr($this->File, 0, strrpos($this->File, '.'));
        //$Extension = substr($this->File, strrpos($this->File, '.')+1);
        return $Name.'-'.intval($Width).'x'.intval($Height).'.jpg';
    }

    /**
     * generated thumbnail from original image by requested params
     * @author keeper
     * @param array $arrThumbParams
     * @return Image_Thumb|null
     */
    function generateThumb($arrThumbParams)
    {
        $config = System_Components::getComponentConfig('Image');

        $tableThumb = new Image_Thumb_Table();
        $objThumb = $tableThumb->fetchNew();
        $objThumb->Image_ID = $this->ID;
        $objThumb->Width = $arrThumbParams['Width'];
        $objThumb->Height = $arrThumbParams['Height'];
        $objThumb->File = '';
        $objThumb->Path =  '';
        $objThumb->save();

        $objThumb->Path = $objThumb->getPath();

        $objThumb->File = $this->getThumbName($arrThumbParams['Width'], $arrThumbParams['Height']);
        if (!is_dir(Zend_Registry::get('AppFolder').$objThumb->Path)) {
            if (!mkdir(Zend_Registry::get('AppFolder').$objThumb->Path, 0777, true)) {
                $objThumb->delete();
                return;
            }
        }

        $Nameonly = substr($objThumb->File, 0, strrpos($objThumb->File, '.'));
        $Extension = substr($objThumb->File, strrpos($objThumb->File, '.')+1);
        $i = 0;
        while (file_exists(Zend_Registry::get('AppFolder').$objThumb->Path.$objThumb->File)) {
            $objThumb->File = $Nameonly.$i.'.'.$Extension;
            $i++;
        }
        $objThumb->save();

        $original = Image::create(Zend_Registry::get('AppFolder').$this->Path.$this->File);
        $thumb = imagecreatetruecolor($arrThumbParams['Width'], $arrThumbParams['Height']);
        imagecopyresampled($thumb, $original, 0, 0, $arrThumbParams['X'], $arrThumbParams['Y'], $arrThumbParams['Width'], $arrThumbParams['Height'], $this->Width, $this->Height);

        imagejpeg($thumb, Zend_Registry::get('AppFolder').$objThumb->Path.$objThumb->File, $config->Thumb->Quality);
        chmod(Zend_Registry::get('AppFolder').$objThumb->Path.$objThumb->File, 0777);

        imagedestroy($original);
        imagedestroy($thumb);

        return $objThumb;
    }



    /**
     * try to move file from $PathSource to $PathDest and returns the moved File Name
     * @author keeper
     * @param string $Filename
     * @param string $PathSource
     * @param string $PathDest
     * @return string|null Filename on success or NULL on error
     */
    public static function moveFile($Filename, $PathSource, $PathDest)
    {
        if (!file_exists($PathSource . $Filename)) {
            return;
        }

        if (!is_dir($PathDest)) {
            if (!mkdir($PathDest, 0777, true)) {
                return;
            }
        }

        $Nameonly = substr($Filename, 0, strrpos($Filename, '.'));
        $Extension = substr($Filename, strrpos($Filename, '.')+1);
        $FilenameDest = $Filename;
        $i = 0;
        while (file_exists($PathDest . $FilenameDest)) {
            $FilenameDest = $Nameonly.$i.'.'.$Extension;
            $i++;
        }

        if (rename($PathSource.$Filename, $PathDest.$FilenameDest)) {
            return $FilenameDest;
        } else {
            // try to set up permissions
            chmod($PathDest, 0777);
            if (rename($PathSource.$Filename, $PathDest.$FilenameDest)) {
                return $FilenameDest;
            }
        }
        return;
    }

    /**
     * Create a new image from file or URL
     * @todo add more supported formats
     * @author keeper
     * @param string $File path to file
     * @return mixed Image identifier representing the image obtained from the given filename
     */
    public static function create($File)
    {
        $Pathinfo = pathinfo($File);
        switch(strtolower($Pathinfo["extension"]))
        {
            case "jpeg":
            case "jpg":
                    $Image = imagecreatefromjpeg($File);
                    break;
            case "gif":
                    $Image = imagecreatefromgif($File);
                    break;
            case "png":
                    $Image = imagecreatefrompng($File);
                    break;
            case 'bmp':
                    $Image = imagecreatefromwbmp($File);
                    break;
            default:
                    return false;
        }
        return $Image;
    }

    /**
     * download image by url
     */
    public static function download($Source)
    {
        $config = System_Components::getComponentConfig('Image');
        $tableImage = new Image_Table();
        $objImage = $tableImage->fetchNew();
        $Dirname = Zend_Registry::get('AppFolder').$config->Image->PathTemp;
        if (!is_dir($Dirname)) {
            if (!mkdir($Dirname, 0777, true)) {
                return null;
            }
        }
        $objImage->File = basename($Source);
        if (strpos($objImage->File, '?')) {
            $objImage->File = substr($objImage->File, 0, strrpos($objImage->File, '?'));
        }
        if (!$objImage->File) {
            return null;
        }
        if (strpos($objImage->File, '.') === false) {
            return null;
        }

        // get extension and check
        $extension = substr($objImage->File, strrpos($objImage->File, '.')+1);
        if (!in_array(strtolower($extension), array('bmp','jpeg','jpg','tif','tiff','png','gif'))) {
            return null;
        }
        $nameonly = substr($objImage->File, 0, strrpos($objImage->File, '.'));
        $i = 0;
        while (file_exists($Dirname . $objImage->File)) {
            $objImage->File = $nameonly.$i.'.'.$extension;
            $i++;
        }

        // move file to temporary folder
        file_put_contents($Dirname . $objImage->File, file_get_contents($Source));

        // convert tiff file
        if (in_array(strtolower($extension), array('bmp','tif','tiff'))) {
            $image = new Imagick($Dirname.$objImage->File);
            $image->setImageFormat('jpeg');
            $image->writeImage($Dirname.$nameonly.'.jpg');
            unlink($Dirname.$objImage->File);
            $objImage->File = $nameonly.'.jpg';
        }

        $objImage->Path = '';
        $objImage->save();

        // move file to destination folder
        $objImage->Path = $objImage->getPath();
        $objImage->File = Image::moveFile($objImage->File, $Dirname, Zend_Registry::get('AppFolder').$objImage->Path);
        if ($objImage->File) {
            $Image = Image::create(Zend_Registry::get('AppFolder').$objImage->Path.$objImage->File);
            $objImage->Width = imagesx($Image);
            $objImage->Height = imagesy($Image);
            $objImage->save();
            return $objImage;
        } else {
            $objImage->delete();
            return null;
        }
    }

    /*
     * convert tiff to jpeg
     */
    public static function tifftojpeg($Source)
    {




    }
}