<?php

/**
 * Class QREps
 *
 * @created      09.05.2022
 * @author       smiley <smiley@chillerlan.net>
 * @copyright    2022 smiley
 * @license      MIT
 */
namespace WCPOS\Vendor\chillerlan\QRCode\Output;

use function array_values, count, date, implode, is_array, is_numeric, max, min, round, sprintf;
/**
 * Encapsulated Postscript (EPS) output
 *
 * @see https://github.com/t0k4rt/phpqrcode/blob/bb29e6eb77e0a2a85bb0eb62725e0adc11ff5a90/qrvect.php#L52-L137
 * @see https://web.archive.org/web/20170818010030/http://wwwimages.adobe.com/content/dam/Adobe/en/devnet/postscript/pdfs/5002.EPSF_Spec.pdf
 * @see https://web.archive.org/web/20210419003859/https://www.adobe.com/content/dam/acom/en/devnet/actionscript/articles/PLRM.pdf
 * @see https://github.com/chillerlan/php-qrcode/discussions/148
 */
class QREps extends QROutputAbstract
{
    public const MIME_TYPE = 'application/postscript';
    /**
     * @inheritDoc
     */
    public static function moduleValueIsValid($value) : bool
    {
        if (!is_array($value) || count($value) < 3) {
            return \false;
        }
        // check the first values of the array
        foreach (array_values($value) as $i => $val) {
            if ($i > 3) {
                break;
            }
            if (!is_numeric($val)) {
                return \false;
            }
        }
        return \true;
    }
    /**
     * @param array $value
     *
     * @inheritDoc
     */
    protected function prepareModuleValue($value) : string
    {
        $values = [];
        foreach (array_values($value) as $i => $val) {
            if ($i > 3) {
                break;
            }
            // clamp value and convert from int 0-255 to float 0-1 RGB/CMYK range
            $values[] = round(max(0, min(255, \intval($val))) / 255, 6);
        }
        return $this->formatColor($values);
    }
    /**
     * @inheritDoc
     */
    protected function getDefaultModuleValue(bool $isDark) : string
    {
        return $this->formatColor($isDark ? [0.0, 0.0, 0.0] : [1.0, 1.0, 1.0]);
    }
    /**
     * Set the color format string
     *
     * 4 values in the color array will be interpreted as CMYK, 3 as RGB
     *
     * @throws \chillerlan\QRCode\Output\QRCodeOutputException
     */
    protected function formatColor(array $values) : string
    {
        $count = count($values);
        if ($count < 3) {
            throw new QRCodeOutputException('invalid color value');
        }
        $format = $count === 4 ? '%f %f %f %f C' : '%f %f %f R';
        return sprintf($format, ...$values);
    }
    /**
     * @inheritDoc
     */
    public function dump(?string $file = null) : string
    {
        [$width, $height] = $this->getOutputDimensions();
        $eps = [
            // main header
            '%!PS-Adobe-3.0 EPSF-3.0',
            '%%Creator: php-qrcode (https://github.com/chillerlan/php-qrcode)',
            '%%Title: QR Code',
            sprintf('%%%%CreationDate: %1$s', date('c')),
            '%%DocumentData: Clean7Bit',
            '%%LanguageLevel: 3',
            sprintf('%%%%BoundingBox: 0 0 %s %s', $width, $height),
            '%%EndComments',
            // function definitions
            '%%BeginProlog',
            '/F { rectfill } def',
            '/R { setrgbcolor } def',
            '/C { setcmykcolor } def',
            '%%EndProlog',
        ];
        if ($this::moduleValueIsValid($this->options->bgColor)) {
            $eps[] = $this->prepareModuleValue($this->options->bgColor);
            $eps[] = sprintf('0 0 %s %s F', $width, $height);
        }
        // create the path elements
        /** @phan-suppress-next-line PhanDeprecatedFunction */
        $paths = $this->collectModules(fn(int $x, int $y, int $M_TYPE): string => $this->module($x, $y, $M_TYPE));
        foreach ($paths as $M_TYPE => $path) {
            if ($path === []) {
                continue;
            }
            $eps[] = $this->getModuleValue($M_TYPE);
            $eps[] = implode("\n", $path);
        }
        // end file
        $eps[] = '%%EOF';
        $data = implode("\n", $eps);
        $this->saveToFile($data, $file);
        return $data;
    }
    /**
     * Returns a path segment for a single module
     */
    protected function module(int $x, int $y, int $M_TYPE) : string
    {
        if (!$this->drawLightModules && !$this->matrix->isDark($M_TYPE)) {
            return '';
        }
        $outputX = $x * $this->scale;
        // Actual size - one block = Topmost y pos.
        $top = $this->length - $this->scale;
        // Apparently y-axis is inverted (y0 is at bottom and not top) in EPS, so we have to switch the y-axis here
        $outputY = $top - $y * $this->scale;
        return sprintf('%d %d %d %d F', $outputX, $outputY, $this->scale, $this->scale);
    }
}