<?php
namespace ShortPixel\Model\Image;


if ( ! defined( 'ABSPATH' ) ) {
 exit; // Exit if accessed directly.
}

use ShortPixel\ShortPixelLogger\ShortPixelLogger as Log;

use ShortPixel\Controller\ResponseController as ResponseController;
use ShortPixel\Controller\ApiController as API;

use ShortPixel\Model\File\FileModel as FileModel;
use ShortPixel\Model\AccessModel as AccessModel;

use ShortPixel\Model\Converter\Converter as Converter;

/* ImageModel class.
*
*
* - Represents a -single- image entity *not file*.
* - Can be either MediaLibrary, or Custom .
* - Not a replacement of Meta, but might be.
* - Goal: Structural ONE method calls of image related information, and combining information. Same task is now done on many places.
* -- ShortPixel Class should be able to blindly call model for information, correct metadata and such.
*/

abstract class ImageModel extends \ShortPixel\Model\File\FileModel
{
    // File Status Constants
    const FILE_STATUS_ERROR = -1;
    const FILE_STATUS_UNPROCESSED = 0;
    const FILE_STATUS_PENDING = 1;
    const FILE_STATUS_SUCCESS = 2;
    const FILE_STATUS_RESTORED = 3;
    const FILE_STATUS_TORESTORE = 4; // Used for Bulk Restore

    const FILE_STATUS_PREVENT = -10;
    const FILE_STATUS_MARKED_DONE = -11;

    // Compression Option Consts
    const COMPRESSION_LOSSLESS = 0;
    const COMPRESSION_LOSSY = 1;
    const COMPRESSION_GLOSSY = 2;

		const ACTION_SMARTCROP = 100;
		const ACTION_SMARTCROPLESS = 101;

    // Extension that we process .
    const PROCESSABLE_EXTENSIONS = array('jpg', 'jpeg', 'gif', 'png', 'pdf');

    //
    const P_PROCESSABLE = 0;
    const P_FILE_NOT_EXIST  = 1;
    const P_EXCLUDE_EXTENSION = 2;
    const P_EXCLUDE_SIZE  = 3;
    const P_EXCLUDE_PATH  = 4;
    const P_IS_OPTIMIZED = 5;
    const P_FILE_NOTWRITABLE = 6;
		const P_BACKUPDIR_NOTWRITABLE = 7;
		const P_BACKUP_EXISTS = 8;
		const P_OPTIMIZE_PREVENTED = 9;
		const P_DIRECTORY_NOTWRITABLE = 10;

		// For restorable status
		const P_RESTORABLE = 109;
		const P_BACKUP_NOT_EXISTS = 110;
		const P_NOT_OPTIMIZED = 111;

		const IMAGE_TYPE_MAIN = 0;
		const IMAGE_TYPE_THUMB = 1;
		const IMAGE_TYPE_ORIGINAL = 2;
		const IMAGE_TYPE_RETINA = 3;
		const IMAGE_TYPE_DUPLICATE = 4;

		const FILETYPE_BIGGER = -10;

    protected $image_meta; // metadata Object of the image.
		protected $recordChanged = false;

    // ImageModel properties are not stored but is generated data.  Only storage should happen to the values in Meta.
		/** @var string */
    protected $width;

		/** @var string */
    protected $height;

		/** @var string */
    protected $mime;
   // protected $url; // possibly not in use.

	  /** @var string */
    protected $error_message;

		/** @var int */
    protected $id;

		/** @var string */
		protected $imageType;

		/** @var int */
    protected $processable_status = null;

		/** @var int */
		protected $restorable_status = null;

    /** @var string */
  	protected $optimizePreventedReason;

		// Public var that can be set by OptimizeController to prevent double queries.
		/** @var boolean */
		public $is_in_queue;

    abstract public function getOptimizeUrls();
    abstract protected function saveMeta();
    abstract protected function loadMeta();

    abstract protected function getImprovements();
    abstract protected function getExcludePatterns(); // get the Exclude Pattern(s) for -this- image to compare.

   // abstract protected function getOptimizeFileType();

    // Function to prevent image from doing anything automatically - after fatal error.
    abstract protected function preventNextTry($reason = '');
    abstract public function isOptimizePrevented();
    abstract public function resetPrevent(); // to get going.

    // Construct
    public function __construct($path)
    {
      parent::__construct($path);
    }

    /* Function to run on load-time ( loadMeta ) to check certain values and make sure all data is loaded properly and in case of missing data, to supplant that */
    protected function verifyImage()
    {

      // Only get data from Image if not yet set in metadata.
      if (is_null($this->getMeta('originalWidth')))
        $this->setMeta('originalWidth', $this->get('width'));

      if (is_null($this->getMeta('originalHeight')))
        $this->setMeta('originalHeight', $this->get('height'));

      if (is_null($this->getMeta('tsAdded')))
        $things->setMeta('tsAdded', time());

      $this->setWebp();
      $this->setAvif();

    }

    protected function setImageSize()
    {
      // to prevent is_null check on get to loop if something is off.
      if (is_null($this->width))
      {
        $this->width = false;
      }
      if (is_null($this->height))
      {
        $this->height = false;
      }

      if (! $this->isExtensionExcluded() && $this->isImage() && $this->is_readable() && ! $this->is_virtual() )
      {
         list($width, $height) = @getimagesize($this->getFullPath());
         if ($width)
         {
          $this->width = $width;
         }
         if ($height)
         {
          $this->height = $height;
         }
      }


    }
    /* Check if an image in theory could be processed. Check only exclusions, don't check status etc */
    public function isProcessable()
    {
        // isprocessable runs zillion times, so take the edge off a little.
        if (! is_null($this->processable_status))
        {
            if (self::P_PROCESSABLE === $this->processable_status)
            {
               return true;
            }
            else {
                return false;
            }
        }

        if ( $this->isOptimized() || ! $this->exists()  || (! $this->is_virtual() && ! $this->is_writable()) || (! $this->is_virtual() && ! $this->is_directory_writable() || $this->isPathExcluded() || $this->isExtensionExcluded() || $this->isSizeExcluded() )
				|| $this->isOptimizePrevented() !== false  )
        {
          if(! $this->is_writable() && $this->processable_status == 0)
					{
            $this->processable_status = self::P_FILE_NOTWRITABLE;
					}
					elseif(! $this->is_directory_writable() && $this->processable_status == 0)
					{
            $this->processable_status = self::P_DIRECTORY_NOTWRITABLE;
					}
          return false;
        }
        else
				{
					$this->processable_status = self::P_PROCESSABLE;
          return true;
				}
    }

    public function isProcessableFileType($type = 'webp')
    {
        $settings = \WPSPIO()->settings();

				if ( AccessModel::getInstance()->isFeatureAvailable($type) === false)
				{
					 return false;
				}

				if ($type == 'webp' && ! $settings->createWebp)
          return false;

        if ($type == 'avif' && ! $settings->createAvif)
            return false;

				// Pdf, no special files.
				if ($this->getExtension() == 'pdf')
					return false;

				$imgObj = $this->getImageType($type);

				// if this image doesn't have webp / avif, it can be processed.
        if ($imgObj === false && $this->getMeta($type) !== self::FILETYPE_BIGGER)
          return true;
        else
          return false;
    }

		public function isProcessableAnyFileType()
		{
			  $webp = $this->isProcessableFileType('webp');
				$avif = $this->isProcessableFileType('avif');

				if ($webp === false && $avif === false)
					return false;
				else {
					return true;
				}
		}

    // Function to check if the reason it won't process is because user did some setting
    public function isUserExcluded()
    {
      if (is_null($this->processable_status))
      {
         $this->isProcessable();
      }

        $reasons = array(
            self::P_EXCLUDE_PATH,
            self::P_EXCLUDE_SIZE,
        );

        if (in_array($this->processable_status, $reasons))
        {
           return true;
        }
        return false;
    }

    public function cancelUserExclusions()
    {
       if ($this->isUserExcluded())
       {
          $this->processable_status = 0;
       }
    }

    public function exists($forceCheck = false)
    {
       $result = parent::exists($forceCheck);
       if ($result === false)
       {
          $this->processable_status = self::P_FILE_NOT_EXIST;
       }
       return $result;
    }

		/** In time this should replace the other. This one added for semantic reasons. */
		public function getReason($name = 'processable')
		{
				$status = null;

			 if ($name == 'processable')
			 	$status = $this->processable_status;
			 elseif($name == 'restorable')
			 	$status = $this->restorable_status;

			 return $this->getProcessableReason($status);
		}

    public function getProcessableReason($status = null)
    {
      $message = false;
			$status = (! is_null($status)) ? $status : $this->processable_status;

      switch($status)
      {
         case self::P_PROCESSABLE:
            $message = __('Image Processable', 'shortpixel-image-optimiser');
         break;
         case self::P_FILE_NOT_EXIST:
            $message = __('File does not exist', 'shortpixel-image-optimiser');
         break;
         case self::P_EXCLUDE_EXTENSION:
            $message = __('Image Extension not processable', 'shortpixel-image-optimiser');
         break;
         case self::P_EXCLUDE_SIZE:
            $message = __('Image Size Excluded', 'shortpixel-image-optimiser');
         break;
         case self::P_EXCLUDE_PATH:
            $message = __('Image Excluded', 'shortpixel-image-optimiser');
         break;
         case self::P_IS_OPTIMIZED:
            $message = __('Image is already optimized', 'shortpixel-image-optimiser');
         break;
         case self::P_FILE_NOTWRITABLE:
            $message = sprintf(__('Image %s is not writable in %s', 'shortpixel-image-optimiser'), $this->getFileName(), (string) $this->getFileDir());
         break;
				 case self::P_DIRECTORY_NOTWRITABLE:
						$message = sprintf(__('Image directory %s is not writable', 'shortpixel-image-optimiser'), (string) $this->getFileDir());
				 break;
				 case self::P_BACKUPDIR_NOTWRITABLE:
				 		$message = __('Backup directory is not writable', 'shortpixel-image-optimiser');
				 break;
				 case self::P_BACKUP_EXISTS:
				 		$message = __('Backup already exists', 'shortpixel-image-optimiser');
				 break;
				 case self::P_OPTIMIZE_PREVENTED:
				 		$message = __('Fatal error preventing processing', 'shortpixel-image-optimiser');
						if (property_exists($this, 'optimizePreventedReason'))
						$message = $this->get('optimizePreventedReason');
				 break;
				 // Restorable Reasons
				 case self::P_RESTORABLE:
				 		$message = __('Image restorable', 'shortpixel-image-optimiser');
				 break;
				 case self::P_BACKUP_NOT_EXISTS:
				 		$message = __('Backup does not exist', 'shortpixel-image-optimiser');
				 break;
				 case self::P_NOT_OPTIMIZED:
				 		$message = __('Image is not optimized', 'shortpixel-image-optimiser');
				 break;
         default:
            $message = __(sprintf('Unknown Issue, Code %s',  $this->processable_status), 'shortpixel-image-optimiser');
         break;
      }

      return $message;
    }


    public function isImage()
    {
        if (! $this->exists())
          return false;
        if ($this->is_virtual()) // if virtual, don't filecheck on image.
        {
            if (! $this->isExtensionExcluded() )
              return true;
            else
              return false;
        }

				if (! is_null($this->mime))
				{
					return true;
				}

				if (\wpSPIO()->env()->is_function_usable('finfo_open')) // Faster function for getting mime types
					 {
						 $fileinfo = finfo_open(FILEINFO_MIME_TYPE);
						 $this->mime = finfo_file($fileinfo, $this->getFullPath());
						 finfo_close($fileinfo);
					 	 //FILEINFO_MIME_TYPE
					}
					elseif(\wpSPIO()->env()->is_function_usable('mime_content_type')) {
						$this->mime = mime_content_type($this->getFullPath());
					}
					else {
						return true; // assume without check, that extension says what it is.
						// @todo This should probably trigger a notice in adminNoticesController.
					}

	        if (strpos($this->mime, 'image') >= 0)
	           return true;
	        else
	          return false;

    }

    public function get($name)
    {
       if (property_exists($this, $name))
       {
          if ( ($name == 'width' || $name == 'height') && is_null($this->$name))  // dynamically load this.
          {
            $this->setImageSize();
          }

        return $this->$name;
       }

       return null;
    }


    public function __get($name)
    {
        return $this->get($name);
    }

    public function getMeta($name = false)
    {
      if ($name === false)
      {
        return $this->image_meta;
      }

      if (! property_exists($this->image_meta, $name))
      {
          Log::addWarn('GetMeta on Undefined Property : ' . $name);
          return null;
      }

      return $this->image_meta->$name;
    }

		/* Get counts of what needs to be optimized still
		* @param String What to count: thumbnails, webp, avif.
		*/
		public function getCountOptimizeData($param = 'thumbnails')
		{
				$optimizeData = $this->getOptimizeData();

				if (! isset($optimizeData['params']) || ! isset($optimizeData['urls']))
				{
					array(array(), 0);
				}

				$count = 0;
				$urls = array();
				$i = 0;

				$params = $optimizeData['params'];

				if ($param == 'thumbnails')
					$param = 'image';

				// Take the optimizeData and take key - param column, then check if the param (image/webp/avif) is true (filter) .
				$combinedArray = array_filter(array_combine(array_keys($params), array_column($params, $param)));

				$count = count($combinedArray);
				foreach($combinedArray as $sizeName => $unneeded)
				{
					 $urls[] = $optimizeData['paths'][$sizeName];
				}
				return array($urls, $count);

		}

	  protected function getImageType($type = 'webp')
	  {
	    $fs = \wpSPIO()->filesystem();
			if ($this->getMeta($type) === self::FILETYPE_BIGGER)
				return false;

	    if (! is_null($this->getMeta($type)))
	    {
				// Filter to disable assumption(s) on the file basis of imageType.  Active when something has manually been deleted.
				$metaCheck = apply_filters('shortpixel/image/filecheck', false);
	      $filepath = $this->getFileDir() . $this->getMeta($type);
	      $file = $fs->getFile($filepath);

				if ($metaCheck === false)
				{
					 return $file;
				}
	    }

			if ($type == 'webp')
			{
	    	$is_double = \wpSPIO()->env()->useDoubleWebpExtension();
			}
			if ($type == 'avif')
			{
				$is_double = \wpSPIO()->env()->useDoubleAvifExtension();
			}

			$double_filepath = $this->getFileDir() .  $this->getFileName() . '.' . $type;
		  $filepath = $this->getFileDir() . $this->getFileBase() . '.' . $type;

			if ($is_double)
				$file = $fs->getFile($double_filepath);
			else
	    	$file = $fs->getFile($filepath);

			// If double extension is enabled, but no file, check the alternative.
			if (! $file->is_virtual() && ! $file->exists())
			{
				 if ($is_double)
				 		$file = $fs->getFile($filepath);
				 else
				 		$file = $fs->getFile($double_filepath);
			}

	    if (! $file->is_virtual() && $file->exists())
	      return $file;

      // If we are in filtered special mode and indeed file doesn't not exist anymore, save it. . Metacheck implies that the imagetype was set before the check
      if ( isset($metaCheck) && true === $metaCheck && false === $file->exists())
      {
          $this->setMeta($type, null);
      }
	    return false;
	  }

    // @todo Deprecate this in favor of getImageType
		public function getWebp()
		{
				return $this->getImageType('webp');
		}

    // @todo Deprecate this in favor of getImageType
	  public function getAvif()
	  {
	    	return $this->getImageType('avif');
	  }

	  protected function setWebp()
	  {
	      $webp = $this->getImageType('webp');
	      if ($webp !== false && $webp->exists())
        {
	        $this->setMeta('webp', $webp->getFileName() );
        }
	  }

	  protected function setAvif()
	  {
	      $avif = $this->getImageType('avif');
	      if ($avif !== false && $avif->exists())
        {
	        $this->setMeta('avif', $avif->getFileName() );
        }
	  }

    public function setMeta($name, $value)
    {
      if (! $this->hasMeta($name))
      {
          Log::addDebug('Writing meta non existing' . $name);
          return false;
      }
      else
			{
				if ($this->image_meta->$name !== $value)
				{
					 $this->recordChanged(true, $this->image_meta->$name, $value);
				}
        $this->image_meta->$name = $value;

			}
    }

		// Indicates this image has changed data.  Parameters optional for future use.
		protected function recordChanged($bool = true, $old_value = null, $new_value = null)
		{
			 $this->recordChanged = $bool; // Updated record for this image.
		}

    protected function didRecordChange()
    {
       return $this->recordChanged;
    }

    public function hasMeta($name)
    {
        return (property_exists($this->image_meta, $name));
    }

    public function isOptimized()
    {
      if ($this->getMeta('status') == self::FILE_STATUS_SUCCESS)
      {
          $this->processable_status = self::P_IS_OPTIMIZED;
          return true;
      }

      return false;
    }

    /* Returns the improvement of Image by optimizing
    * @param boolean $int When true, returns only integer, otherwise a formatted number for display
    */
    public function getImprovement($int = false)
    {
        if ($this->isOptimized())
        {
            $original = $this->getMeta('originalSize');
            $optimized = $this->getMeta('compressedSize');

            //$diff = $original - $optimized;
            if ($original <= 0 || $optimized <= 0)
              return null;

            if (! $int)
              return round(100.0 * (1.0 - $optimized / $original), 2);
            else
              return $original - $optimized;

        }
        else
          return 0;
    }


    /** Handles an Optimized Image in a general way
    *
    * - This function doesn't handle any specifics like custom / thumbnails or anything else, just for a general image
    * - This function doesn't save metadata, that's job of subclass
    *
    * @param Array Result Array. One image result array. ie.
		*
    */
		/*
						[image] => Array
                (
                    [url] =>
                    [originalSize] => 46188
                    [optimizedSize] => 21200
                    [status] => 2
                )

            [webp] => Array
                (
                    [url] =>
                    [size] => 14280
                    [status] => 2
                )

            [avif] => Array
                (
                    [url] =>
                    [size] => 14094
                    [status] => 2
                )
		*/
    public function handleOptimized($results, $args = array())
    {
        $settings = \wpSPIO()->settings();
        $fs = \wpSPIO()->filesystem();

				$defaults = array('isConverted' => false,
				);

				$args = wp_parse_args($args, $defaults);

				$status = $results['image']['status'];

          if ($settings->backupImages)
          {
							// If conversion to jpg is done, this function also does the backup.
							if (true === $args['isConverted'])
							{
									 $backupok = true;
							}
							else
							{
              	 $backupok = $this->createBackup();
							}

              if (! $backupok)
              {
                Log::addError('Backup Not OK - ' . $this->getFileName(), $args);

								$response = array(
										'is_error' => true,
										'issue_type' => ResponseController::ISSUE_BACKUP_CREATE,
										'message' => __('Could not create backup. Please check file permissions', 'shortpixel-image-optimiser'),
										'fileName' => $this->getFileName(),
								);

								ResponseController::addData($this->get('id'), $response);

								$this->preventNextTry(__('Could not create backup'));
                return false;
              }
          }

					if (true === $this->is_virtual())
					{
						$originalSize = $results['image']['originalSize'];
					}
					else {
						$originalSize = $this->getFileSize();
					}

          if ($status == API::STATUS_UNCHANGED || $status == API::STATUS_OPTIMIZED_BIGGER)
          {
            $copyok = true;
            $optimizedSize = $this->getFileSize();
            $tempFile = null;
          }
          else
          {
						$tempFile = $fs->getFile($results['image']['file']);

            if ($this->is_virtual())
            {
                $filepath = apply_filters('shortpixel/file/virtual/translate', $this->getFullPath(), $this);
                $virtualFile = $fs->getFile($filepath);
                // Seems stateless like google cloud doesn't like overwrites with declared delete
                if ($this->virtual_status == self::$VIRTUAL_STATELESS)
                {
                    $virtualFile->delete();
                }
                $copyok = $tempFile->copy($virtualFile);

                // File has been copied to local system, set the path to real to be able to get file and image sizes.
                if ($copyok)
                {
                  $this->setVirtualToReal($filepath);
                }
            }
            else
            {
                $copyok = $tempFile->copy($this);
            }

             $this->setImageSize();
             $optimizedSize  = $tempFile->getFileSize();
          } // else

          if ($copyok)
          {
             $this->processable_status = self::P_IS_OPTIMIZED; // don't let this linger

             $this->setMeta('status', self::FILE_STATUS_SUCCESS);
             $this->setMeta('tsOptimized', time());
             $this->setMeta('compressedSize', $optimizedSize);
             $this->setMeta('originalSize', $originalSize);

             if ($this->hasMeta('did_keepExif'))
              $this->setMeta('did_keepExif', $settings->keepExif);
             if ($this->hasMeta('did_cmyk2rgb'))
              $this->setMeta('did_cmyk2rgb', $settings->CMYKtoRGBconversion);

             // Not set before in this case.
             if (is_null($this->getMeta('compressionType')) || $this->getMeta('compressionType') === false)
             {
                $this->setMeta('compressionType', $settings->compressionType);
             }

             if ($settings->resizeImages)
             {
               $resizeWidth = $settings->resizeWidth;
               $resizeHeight = $settings->resizeHeight;

							 $originalWidth = $this->getMeta('originalWidth');
							 $originalHeight = $this->getMeta('originalHeight');

							 $width = $this->get('width'); // image width
							 $height = $this->get('height');

               if ( ($resizeWidth == $width && $width != $originalWidth)  || ($resizeHeight == $height && $height != $originalHeight ) ) // resized.
               {
                   $this->setMeta('resizeWidth', $width );
                   $this->setMeta('resizeHeight', $height );
                   $this->setMeta('resize', true);
									 $resizeType = ($settings->resizeType == 1) ? __('Cover', 'shortpixel-image-optimiser') : __('Contain', 'shortpixel-image-optimiser');
									 $this->setMeta('resizeType', $resizeType);
               }
               else
                 $this->setMeta('resize', false);
             }
          }
          else
          {
            Log::addError('Copy failed for  ' . $this->getFullPath() );

						$response = array(
								'is_error' => true,
								'issue_type' => ResponseController::ISSUE_BACKUP_CREATE,
								'message' => __('Could not copy optimized image from temporary files. Check file permissions', 'shortpixel-image-optimiser'),
								'fileName' => $this->getFileName(),
						);

						ResponseController::addData($this->get('id'), $response);;

            return false;
          }
          return true;

        Log::addWarn('Could not find images of this item in tempfile -' . $this->id . '(' . $this->getFullPath() . ')', array_keys($results) );

				$response = array(
					 'is_error' => true,
					 'issue_type' => ResponseController::ISSUE_OPTIMIZED_NOFILE,
					 'message' => __('Image is reporting as optimized, but file couldn\'t be found in the downloaded files', 'shortpixel-image-optimiser'),
					 'fileName' => $this->getFileName(),
				);

				ResponseController::addData($this->get('id'), $response);

        return null;
    }

    public function handleOptimizedFileType($downloadResult)
    {
				 $fs = \wpSPIO()->filesystem();

          if (isset($downloadResult['webp']) && isset($downloadResult['webp']['file'])) // check if there is webp with same filename
          {
						$tmpFile = $fs->getFile($downloadResult['webp']['file']);

             $webpResult = $this->handleWebp($tmpFile);
              if ($webpResult === false)
              {
                if (is_object($tmpFile))
                {
                  Log::addWarn('Webps available, but copy failed ' . $tmpFile->getFullPath());
                }
                else {
                  Log::addWarn('Webps available, but tmpFile not object / failed ', $downloadResult['webp']);
                }
              }
              else
                $this->setMeta('webp', $webpResult->getFileName());
          }
					elseif(isset($downloadResult['webp']) && isset($downloadResult['webp']['status']))
					{
						 if ($downloadResult['webp']['status'] == API::STATUS_OPTIMIZED_BIGGER)
						 {
							  $this->setMeta('webp', self::FILETYPE_BIGGER);
						 }
					}

          if (isset($downloadResult['avif']) && isset($downloadResult['avif']['file'])) // check if there is webp with same filename
          {
						 $tmpFile = $fs->getFile($downloadResult['avif']['file']);
             $avifResult = $this->handleAvif($tmpFile);
              if ($avifResult === false)
                Log::addWarn('Avif available, but copy failed ' . $tmpFile->getFullPath());
              else
                $this->setMeta('avif', $avifResult->getFileName());
          }
					elseif(isset($downloadResult['avif']) && isset($downloadResult['avif']['status']))
					{

						 if ($downloadResult['avif']['status'] == API::STATUS_OPTIMIZED_BIGGER)
						 {
								$this->setMeta('avif', self::FILETYPE_BIGGER);
						 }
					}
    }

    public function isRestorable()
    {

			// Check for both optimized and hasBackup, because even if status for some reason is not optimized, but backup is there, restore anyhow.
        if (! $this->isOptimized() && ! $this->hasBackup())
        {
					 $this->restorable_status = self::P_NOT_OPTIMIZED;
           return false;  // not optimized, done.
        }
        elseif ($this->hasBackup() && ($this->is_virtual() || ($this->is_writable() && $this->is_directory_writable()) ))
        {
					$this->restorable_status = self::P_RESTORABLE;
          return true;
        }
        else
        {
					if ($this->is_virtual()) // Is_virtual, but no backup found ( see up )
					{
						$this->restorable_status = self::P_BACKUP_NOT_EXISTS;
					}
          elseif (! $this->is_writable())
          {
						  $response = array(
									'is_error' => true,
									'issue_type' => ResponseController::ISSUE_FILE_NOTWRITABLE,
									'message' => __('This file can\'t be restored, not writable', 'shortpixel-image-optimiser'),

							);
							ResponseController::addData($this->get('id'), $response);

							$this->restorable_status = self::P_FILE_NOTWRITABLE;
              Log::addWarn('Restore - Not Writable ' . $this->getFullPath() );
          }
					elseif (! $this->is_directory_writable())
					{
							$response = array(
									'is_error' => true,
									'issue_type' => ResponseController::ISSUE_DIRECTORY_NOTWRITABLE,
									'message' => __('This file can\'t be restored, directory is not writable', 'shortpixel-image-optimiser'),

							);
							ResponseController::addData($this->get('id'), $response);

							$this->restorable_status = self::P_DIRECTORY_NOTWRITABLE;
							Log::addWarn('Restore - Directory not Writable ' . $this->getFileDir() );
					}
          elseif (! $this->hasBackup())
					{
						$this->restorable_status = self::P_BACKUP_NOT_EXISTS;
						$response = array(
								'is_error' => true,
								'issue_type' => ResponseController::ISSUE_BACKUP_EXISTS,
								'message' => __('Can\'t restore, backup file doesn\'t exist', 'shortpixel-image-optimiser'),

						);
						ResponseController::addData($this->get('id'), $response);
            Log::addDebug('Backup not found for file: ', $this->getFullPath());
					}
           return false;
        }
    }

    /** Restores a backup to original file *
    *
    * **NOTE** This function only moves the file but doesn't save the meta, which should reflect the changes!
    */
    public function restore()
    {
        if (! $this->isRestorable())
        {
            Log::addWarn('Trying restore action on non-restorable: ' . $this->getFullPath(), $this->getReason('restorable'));
            return false; // no backup / everything not writable.
        }

        $backupFile = $this->getBackupFile();
				$type = $this->get('type');
				$id = $this->get('id');

        if (! $backupFile)
        {
          Log::addWarn('Issue with restoring BackupFile, probably missing - ', $backupFile);
          return false; //error
        }

        if (! $backupFile->is_readable())
        {
						Log::addError('BackupFile not readable' . $backupFile->getFullPath());
						$response = array(
								'is_error' => true,
								'issue_type' => ResponseController::ISSUE_BACKUP_EXISTS,
								'message' => __('BackupFile not readable. Check file and/or file permissions', 'shortpixel-image-optimiser'),
						);
						ResponseController::addData($this->get('id'), $response);

           return false; //error
         }
				 elseif (! $backupFile->is_writable())
				 {
 						Log::addError('BackupFile not writable' . $backupFile->getFullPath());
						 $response = array(
								 'is_error' => true,
								 'issue_type' => ResponseController::ISSUE_FILE_NOTWRITABLE,
								 'message' => __('The backup file is not writable. Check file and/or file permissions', 'shortpixel-image-optimiser'),

						 );
						 ResponseController::addData($this->get('id'), $response);
            return false; //error
				 }
				 if (! $this->is_writable())
				 {
					 	 Log::addError('Target File not writable' . $this->getFullPath());

						 $response = array(
								 'is_error' => true,
								 'issue_type' => ResponseController::ISSUE_FILE_NOTWRITABLE,
								 'message' => __('Target file not writable. Check file permissions', 'shortpixel-image-optimiser'),

						 );
						 ResponseController::addData($this->get('id'), $response);

						 return false;
				 }

				$bool = $backupFile->move($this);

        if ($bool !== true)
        {
					Log::addError('Moving backupFile failed -' . $this->getFullpath() );
					$response = array(
							'is_error' => true,
							'issue_type' => ResponseController::ISSUE_FILE_NOTWRITABLE,
							'message' => __('Moving Backup file failed', 'shortpixel-image-optimiser'),

					);
					ResponseController::addData($this->get('id'), $response);
        }
				else {
					$this->width = null;
					$this->height = null;
					$this->mime = null;

				}

        // Reset statii
        $this->restorable_status = null;
        $this->processable_status = null;
        return $bool;
    }

    /** When an image is deleted
    *
    *  Handle an image delete i.e. by WordPress or elsehow.
    */
    public function onDelete()
    {
        if ($this->hasBackup())
        {
           $file = $this->getBackupFile();
           $file->delete();
        }

        $webp = $this->getWebp();
        $avif = $this->getAvif();

        if ($webp !== false && $webp->exists())
          $webp->delete();

        if ($avif !== false && $avif->exists())
           $avif->delete();

    }


    protected function handleWebp(FileModel $tempFile)
    {
         $fs = \wpSPIO()->filesystem();
				 if ($this->is_virtual())
				 {
					 	$fullpath = apply_filters('shortpixel/file/virtual/translate', $this->getFullPath(), $this);
						$fileObj = $fs->getFile($fullpath);
						$fileDir = $fileObj->getFileDir();
				 }
				 else {
				 		$fileDir = $this->getFileDir();
				 }

         $target = $fs->getFile( (string) $fileDir . $this->getFileBase() . '.webp');

            // only copy when this constant is set.
            if( (defined('SHORTPIXEL_USE_DOUBLE_WEBP_EXTENSION') && SHORTPIXEL_USE_DOUBLE_WEBP_EXTENSION) == true ) {
                 $target = $fs->getFile((string) $fileDir . $this->getFileName() . '.webp'); // double extension, if exists.
            }

            $result = false;

            if (false === $target->exists()) // don't copy if exists.
            {
							$result = $tempFile->copy($target);
						}
            else
						{
              $result = true; // if already exists, all fine by us.
						}

            if (false === $result)
						{
              Log::addWarn('Could not copy Webp to destination ' . $target->getFullPath() );
							return false;
						}
            return $target;

         return false;
    }


    protected function handleAvif(FileModel $tempFile)
    {
         $fs = \wpSPIO()->filesystem();
				 if ($this->is_virtual())
				 {
						$fullpath = apply_filters('shortpixel/file/virtual/translate', $this->getFullPath(), $this);
						$fileObj = $fs->getFile($fullpath);
						$fileDir = $fileObj->getFileDir();
				 }
				 else {
						$fileDir = $this->getFileDir();
				 }

            $target = $fs->getFile( (string) $fileDir . $this->getFileBase() . '.avif');

						// only copy when this constant is set.
            if( (defined('SHORTPIXEL_USE_DOUBLE_AVIF_EXTENSION') && SHORTPIXEL_USE_DOUBLE_AVIF_EXTENSION) == true ) {
                 $target = $fs->getFile((string) $fileDir . $this->getFileName() . '.avif'); // double extension, if exists.
            }

            $result = $tempFile->copy($target);
            if (! $result)
              Log::addWarn('Could not copy Avif to destination ' . $target->getFullPath() );
            return $target;
      //   }

         return false;
    }


    protected function isPathExcluded()
    {
       $excludePatterns = $this->getExcludePatterns();

        if(!$excludePatterns || !is_array($excludePatterns)) { return false; }

        foreach($excludePatterns as $item) {
            $type = trim($item["type"]);
            if(in_array($type, array("name", "path", 'regex-name','regex-path'))) {
                $pattern = trim($item["value"]);
                $target = ($type == "name") ? $this->getFileName() : $this->getFullPath();


                if ($type == 'regex-name' || $type == 'regex-path')
                {
                    $result = $this->matchExludeRegexPattern($target, $pattern);
                }
                else {
                    $result =  $this->matchExcludePattern($target, $pattern);
                }
                if($result === true) { //search as a substring if not
                    $this->processable_status = self::P_EXCLUDE_PATH;
                    return true;
                }
            }
        }
        return false;
    }

		// Checks Processable extensions. The other way of approval is having the file be convertable.
    protected function isExtensionExcluded()
    {

        if (! is_null($this->getExtension()) && in_array( strtolower($this->getExtension()) , self::PROCESSABLE_EXTENSIONS))
        {
            return false;
        }

				// If extension not in allowed list, check converters.
				// @todo Most likely move this higher up the chain.
				if (true === $this->is_main_file)
				{
					$converter = Converter::getConverter($this, true);
					if (is_object($converter))
					{
							// Yes can convert, so do not exclude.
							if (true === $converter->isConvertable())
							{
								 return false;
							}
					}
				}
        $this->processable_status = self::P_EXCLUDE_EXTENSION;
        return true;
    }

    protected function matchExcludePattern($target, $pattern) {
        if(strlen($pattern) == 0)  // can happen on faulty input in settings.
          return false;

        if (strpos($target, $pattern) !== false)
        {
          return true;
        }

        return false;
    }

    protected function matchExludeRegexPattern($target, $pattern)
    {
      if(strlen($pattern) == 0)  // can happen on faulty input in settings.
        return false;

			$matches = array();
      $m = preg_match($pattern,  $target, $matches);

      if ($m !== false && $m > 0) // valid regex, more hits than zero
      {
        return true;
      }

      return false;
    }

		protected function isSizeExcluded()
		{
			$excludePatterns = $this->getExcludePatterns();

			if (! $excludePatterns || ! is_array($excludePatterns) ) // no patterns, nothing excluded
				return false;

			$bool = false;

			foreach($excludePatterns as $item) {
					$type = trim($item["type"]);
					if($type == "size") {

							$width = $this->get('width');
							$height = $this->get('height');

							if( $width && $height
									 && $this->isProcessableSize($width, $height, $item["value"]) === false){
										 $this->processable_status = self::P_EXCLUDE_SIZE;
										return true; // exit directly because we have our exclusion
								}
							else
									$bool = false; // continue and check all patterns, there might be multiple.
						}
			 }

			 return $bool;
		}

    protected function setVirtualToReal($fullpath)
    {
      $this->resetStatus();
      $this->fullpath = $fullpath;
      $this->directory = null; //reset directory
      $this->is_virtual = false; // stops being virtual
      $this->setFileInfo();
    }

		private function isProcessableSize($width, $height, $excludePattern)
		{

				$ranges = preg_split("/(x|×|X)/",$excludePattern);
				$widthBounds = explode("-", $ranges[0]);
				$minWidth = intval($widthBounds[0]);
				$maxWidth = (!isset($widthBounds[1])) ? intval($widthBounds[0]) : intval($widthBounds[1]);

				$heightBounds = isset($ranges[1]) ? explode("-", $ranges[1]) : false;
				$minHeight = $maxHeight = 0;

				if ($heightBounds)
				{
					$minHeight = intval($heightBounds[0]);
					$maxHeight = (!isset($heightBounds[1])) ? intval($heightBounds[0]) : intval($heightBounds[1]);
				}

				if(   $width >= $minWidth && $width <= $maxWidth
					 && ( $heightBounds === false
							 || ($height >= $minHeight && $height <= $maxHeight) )) {
						return false;
				}
				return true;
		}


    /** Convert Image Meta to A Class */
    protected function toClass()
    {
        return $this->image_meta->toClass();
    }


    protected function createBackup()
    {
        // Safety: It should absolutely not be possible to overwrite a backup file.
       if ($this->hasBackup())
       {
          $backupFile = $this->getBackupFile();

          // If backupfile is bigger (indicating original file)
          if ($backupFile->getFileSize() == $this->getFileSize())
          {
             return true;
          }
          else
          {
            // Return the backup for a retry.
            if ($this->isRestorable() && ($backupFile->getFileSize() > $this->getFileSize()))
            {
                Log::addWarn('Backup Failed, File is restorable, try to recover. ' . $this->getFullPath() );
                $this->restore();

								$this->error_message = __('Backup already exists, but image is recoverable and the plugin will rollback. Will retry to optimize again. ', 'shortpixel-image-optimiser');
            }
/*						elseif ($backupFile->getFileSize() > $this->getFileSize() && ! $backupFile->is_virtual() ) // Where there is a backup and it's bigger, assume some hickup, but there is backup so hooray
						{
						 		Log::addWarn('Backup already exists. Backup file is bigger, so assume that all is good with backup and proceed');
							 return true; // ok it.
						} */
            else
            {
              $this->preventNextTry(__('Fatal Issue: The Backup file already exists. The backup seems not restorable, or the original file is bigger than the backup, indicating an error.', 'shortpixel-image-optimiser'));

              Log::addError('The backup file already exists and it is bigger than the original file. BackupFile Size: ' . $backupFile->getFileSize() . ' This Filesize: ' . $this->getFileSize(), $this->fullpath);

              $this->error_message = __('Backup not possible: it already exists and the original file is bigger.', 'shortpixel-image-optimiser');
            }

            return false;
          }
          exit('Fatal error, createbackup protection - this should never reach');
       }
       $directory = $this->getBackupDirectory(true);
       $fs = \wpSPIO()->filesystem();

       // @Deprecated
       if(apply_filters('shortpixel_skip_backup', false, $this->getFullPath(), $this->is_main_file)){
           return true;
       }
       if(apply_filters('shortpixel/image/skip_backup', false, $this->getFullPath(), $this->is_main_file)){
           return true;
       }

       if (! $directory)
       {
          Log::addWarn('Could not create Backup Directory for ' . $this->getFullPath());
          $this->error_message = __('Could not create backup Directory', 'shortpixel-image-optimiser');
          return false;
       }

       $backupFile = $fs->getFile($directory . $this->getBackupFileName());

       // Same file exists as backup already, don't overwrite in that case.
       if ($backupFile->exists() && $this->hasBackup() && $backupFile->getFileSize() == $this->getFileSize())
       {
          $result = true;
       }
       else
       {
         $result = $this->copy($backupFile);
       }

       if (! $result)
       {
          Log::addWarn('Creating Backup File failed for ' . $this->getFullPath());
          return false;
       }

       if ($this->hasBackup())
         return true;
       else
       {
          Log::addWarn('FileModel returns no Backup File for (failed) ' . $this->getFullPath());
          return false;
       }
    }

    protected function fs()
    {
       return \wpSPIO()->filesystem();
    }

		protected function createParamList($args = array())
		{
			$settings = \wpSPIO()->settings();

		 $resize = false;
		 $hasResizeSizes = (intval($settings->resizeImages) > 0) ? true : false;
		 $result = array();

		 $useSmartCrop = false;
     $useResize = false;

     if ($this->getExtension() !== 'pdf')
     {
    		 if (isset($args['smartcrop']))
    		 {
    			  $useSmartCrop = $args['smartcrop'];
    		 }
    		 else {
    		 	 $useSmartCrop = (bool) $settings->useSmartCrop;
    		 }
     }

     /** This construct. If both resize and smartcrop are on, the smartcrop is applied to cropped images, and resize to the rest. If one or the other is off, apply that setting to all if possible */
     if ($this->getExtension() == 'pdf') // pdf can never be smartcrop
     {
        $useSmartCrop = false;
        if (true === $hasResizeSizes)
        {
          $useResize = true;
        }
     }
     elseif ( true === $useSmartCrop && true === $hasResizeSizes )
     {
        $size = is_array($this->sizeDefinition) ? $this->sizeDefinition : false;

        if (false === $size) // if there is no size definition, err on the safe side.
        {
           $useResize = true;
           $useSmartCrop = false;
        }
        else {
            if (true == $size['crop'])
            {
              $useResize = false;
              $useSmartCrop = true;
            }
            else {
              $useResize = true;
              $useSmartCrop = false;
            }
        }
     }
		 elseif (true === $useSmartCrop) // these for clarity
		 {
			$useSmartCrop = true;
      $useResize = false;
		 }
		 elseif (true === $hasResizeSizes)
		 {
		 	 $useResize = true;
       $useSmartCrop = false;
		 }

     // Log if this goes wrong, but err on the side of resize if so.
     if (true === $useSmartCrop && true === $useResize)
     {
      Log::addError('Both UseSmartCrop and UseResize are true, this should not be');
     }

     if (true === $useSmartCrop)
     {
        $resize = 4;
     }
     if (true === $useResize)
     {
        $resize = $settings->resizeImages ? 1 + 2 * ($settings->resizeType == 'inner' ? 1 : 0) : 0;
     }

		 if ($resize > 0)
		 {
			 $resize_width = $resize_height = 0; // can be not set.
 	 		 $width = $this->get('width');
			 $height = $this->get('height');

       if (true === $useSmartCrop)
       {
         $url = $args['main_url'];
       }
       else {
         $url = $args['url'];
       }

			 if ($hasResizeSizes)
			 {
			 		$resize_width = intval($settings->resizeWidth);
			 		$resize_height = intval($settings->resizeHeight);
					// If retina, allowed resize sizes is doubled, otherwise big image / big retina would end up same sizes.
					if ($this->get('imageType') == self::IMAGE_TYPE_RETINA)
					{
						 $resize_width = $resize_width * 2;
						 $resize_height = $resize_height * 2;
					}
				}

				$width =  ($width <= $resize_width || $resize_width === 0) ? $width : $resize_width;
				$height = ($height <= $resize_height || $resize_height === 0) ? $height : $resize_height;

			 	$result = array('resize' => $resize, 'resize_width' => $width, 'resize_height' => $height);
			}
      else {
        $url = $args['url'];
      }

      $result['url'] = $url; // select which url to use.

		 // Check if the image is not excluded
		 $imageOk = ($this->isProcessable(true) || $this->isOptimized()) ? true : false ;

		 $result['image'] = $this->isProcessable(true);
		 $result['webp']  = ($imageOk && $this->isProcessableFileType('webp')) ? true : false;
		 $result['avif']  = ($imageOk && $this->isProcessableFileType('avif')) ? true : false;

     $result = apply_filters('shortpixel/image/imageparamlist', $result, $this->id, $this);
		 return $result;

		}


} // model