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class Kimage {
    
    private $image, $width, $height = false;
    
    public function __construct($file) {
        $this->tmp($file);
    }
    
    public function save($filename, $quality = 9) {
        imagepng($this->image, $filename, $quality, PNG_ALL_FILTERS);
    }
    
    public function tmp($image) {
        if (file_exists($image)) {
            $image = file_get_contents($image);
        } elseif (preg_match('#[^-A-Za-z0-9+/=]|=[^=]|={3,}$#', $image)) {
            $image = base64_decode($image);
        } elseif (substr($image, 0, 4) == 'http') {
            if (list(, , $type) = getimagesize($image)) {
                if ($type) {
                    $upload = new SplFileObject($image, 'rb');
                    $image = '';
                    while (!$upload->eof()) {
                        $image .= $upload->fgets();
                    }
                } else {
                    throw new Exception('Unsupported image type');
                
                    return false;
                }
            } else {
                throw new Exception('Unsupported image type');
                
                return false;
            }
        } else {
            throw new Exception('Bad path to image');
            
            return false;
        }

        $image = imagecreatefromstring($image);

        if (!is_resource($image)) {
            throw new Exception('Image create failed');
            
            return false;
        }

        $this->width = imagesx($image);
        $this->height = imagesy($image);
        $this->image = $image;
        
        imagesavealpha($this->image, true);
        imagealphablending($this->image, false);
        
        return $this;
    }
    
    public function mirroring() {
        $newimage = $this->newImage($this->width, $this->height);
        foreach(range($this->width, 0) as $range) {
            imagecopy($newimage, $this->image, $this->width - $range - 1, 0, $range, 0, 1, $this->height);
        }
        $this->image = $newimage;
        
        return $this;
    }
    
    public function newImage($width, $height) {
        $newimg = imagecreatetruecolor($width, $height);
        $transparent = imagecolorallocatealpha($newimg, 255, 255, 255, 127);
        imagefill($newimg, 0, 0, $transparent);
        imagealphablending($newimg, true);
        imagesavealpha($newimg, true);
        
        return $newimg;
    }
    
    public function rotate($angle = 90) {
        $transparent = imagecolorallocatealpha($this->image, 0, 0, 0, 127);
        $rotate = imagerotate($this->image, $angle, $transparent);
        imagealphablending($rotate, true);
        imagesavealpha($rotate, true);
        $this->image = $rotate;
        $this->setSizes();

        return $this;
    }
    
    public function reHeight($height) {
        $width = $this->width * ($height / $this->height);
        $this->resize($width, $height);
        
        return $this;
    }
    
    public function reWidth($width) {
        $height = $this->height * ($width / $this->width);
        $this->resize($width, $height);
        
        return $this;
    }
    
    public function scale($scale) {
        $width = $this->width * ($scale / 100);
        $height = $this->height * ($scale / 100);
        $this->resize($width, $height);
        
        return $this;
    }
    
    public function resize($width, $height) {
        $newimage = $this->newImage($width, $height);
        imagecopyresampled($newimage, $this->image, 0, 0, 0, 0, $width, $height, $this->width , $this->height);
        $this->image = $newimage;
        $this->setSizes();
        
        return $this;
    }
    
    public function crop($width, $height, $x, $y) {
        $width = $width - $x; 
        $height = $height - $y;
        $newimage = $this->newImage($width, $height);
        imagecopyresampled($newimage, $this->image, 0, 0, $x, $y, $width, $height, $width, $height);
        $this->image = $newimage;
        $this->setSizes();
        
        return $this;
    }

    public function setSizes() {
         $this->width = imagesx($this->image);
         $this->height = imagesy($this->image);
         
         return $this;
    } 
    
    public function grayscale() {
        imagefilter($this->image, IMG_FILTER_GRAYSCALE);
        
        return $this;
    }
}