<?php

namespace RegularLabs\Scoped\Intervention\Image\Imagick\Commands;

use RegularLabs\Scoped\Intervention\Image\Commands\AbstractCommand;
class LimitColorsCommand extends AbstractCommand
{
    /**
     * Reduces colors of a given image
     *
     * @param  \Intervention\Image\Image $image
     * @return boolean
     */
    public function execute($image)
    {
        $count = $this->argument(0)->value();
        $matte = $this->argument(1)->value();
        // get current image size
        $size = $image->getSize();
        // build 2 color alpha mask from original alpha
        $alpha = clone $image->getCore();
        $alpha->separateImageChannel(\Imagick::CHANNEL_ALPHA);
        $alpha->transparentPaintImage('#ffffff', 0, 0, \false);
        $alpha->separateImageChannel(\Imagick::CHANNEL_ALPHA);
        $alpha->negateImage(\false);
        if ($matte) {
            // get matte color
            $mattecolor = $image->getDriver()->parseColor($matte)->getPixel();
            // create matte image
            $canvas = new \Imagick();
            $canvas->newImage($size->width, $size->height, $mattecolor, 'png');
            // lower colors of original and copy to matte
            $image->getCore()->quantizeImage($count, \Imagick::COLORSPACE_RGB, 0, \false, \false);
            $canvas->compositeImage($image->getCore(), \Imagick::COMPOSITE_DEFAULT, 0, 0);
            // copy new alpha to canvas
            $canvas->compositeImage($alpha, \Imagick::COMPOSITE_COPYOPACITY, 0, 0);
            // replace core
            $image->setCore($canvas);
        } else {
            $image->getCore()->quantizeImage($count, \Imagick::COLORSPACE_RGB, 0, \false, \false);
            $image->getCore()->compositeImage($alpha, \Imagick::COMPOSITE_COPYOPACITY, 0, 0);
        }
        return \true;
    }
}
