<?php

declare(strict_types=1);

namespace Intervention\Image\Drivers\Imagick\Encoders;

use Imagick;
use ImagickException;
use Intervention\Image\Drivers\Imagick\Modifiers\StripMetaModifier;
use Intervention\Image\EncodedImage;
use Intervention\Image\Encoders\JpegEncoder as GenericJpegEncoder;
use Intervention\Image\Exceptions\EncoderException;
use Intervention\Image\Exceptions\StreamException;
use Intervention\Image\Exceptions\InvalidArgumentException;
use Intervention\Image\Exceptions\StateException;
use Intervention\Image\Interfaces\EncodedImageInterface;
use Intervention\Image\Interfaces\ImageInterface;
use Intervention\Image\Interfaces\SpecializedInterface;

class JpegEncoder extends GenericJpegEncoder implements SpecializedInterface
{
    /**
     * @throws InvalidArgumentException
     * @throws StreamException
     * @throws StateException
     * @throws EncoderException
     */
    public function encode(ImageInterface $image): EncodedImageInterface
    {
        $format = 'JPEG';
        $compression = Imagick::COMPRESSION_JPEG;
        $backgroundColor = $this->driver()->decodeColor(
            $this->driver()->config()->backgroundColor
        );

        // resolve background color because jpeg has no transparency
        $background = $this->driver()
            ->colorProcessor($image)
            ->export($backgroundColor);

        // set alpha value to 1 because Imagick renders
        // possible full transparent colors as black
        $background->setColorValue(Imagick::COLOR_ALPHA, 1);

        // strip meta data
        if ($this->strip || (is_null($this->strip) && $this->driver()->config()->strip)) {
            $image->modify(new StripMetaModifier());
        }

        try {
            $imagick = clone $image->core()->native();
            $imagick->setImageBackgroundColor($background);
            $imagick->setBackgroundColor($background);
            $imagick->setFormat($format);
            $imagick->setImageFormat($format);
            $imagick->setCompression($compression);
            $imagick->setImageCompression($compression);
            $imagick->setCompressionQuality($this->quality);
            $imagick->setImageCompressionQuality($this->quality);
            $imagick->setImageAlphaChannel(Imagick::ALPHACHANNEL_REMOVE);

            if ($this->progressive) {
                $imagick->setInterlaceScheme(Imagick::INTERLACE_PLANE);
            }

            $result = new EncodedImage($imagick->getImagesBlob(), 'image/jpeg');
            $imagick->clear();

            return $result;
        } catch (ImagickException $e) {
            throw new EncoderException('Failed to encode jpeg format', previous: $e);
        }
    }
}
