<?php

/**
 * Class QRGdImage
 *
 * @created      05.12.2015
 * @author       Smiley <smiley@chillerlan.net>
 * @copyright    2015 Smiley
 * @license      MIT
 *
 * @noinspection PhpComposerExtensionStubsInspection
 */
namespace WCPOS\Vendor\chillerlan\QRCode\Output;

use WCPOS\Vendor\chillerlan\QRCode\Data\QRMatrix;
use WCPOS\Vendor\chillerlan\Settings\SettingsContainerInterface;
use ErrorException;
use Throwable;
use function array_values, count, extension_loaded, imagebmp, imagecolorallocate, imagecolortransparent, imagecreatetruecolor, imagefilledellipse, imagefilledrectangle, imagegif, imagejpeg, imagepng, imagescale, imagetypes, imagewebp, intdiv, intval, is_array, is_numeric, max, min, ob_end_clean, ob_get_contents, ob_start, restore_error_handler, set_error_handler, sprintf;
use const IMG_BMP, IMG_GIF, IMG_JPG, IMG_PNG, IMG_WEBP;
/**
 * Converts the matrix into GD images, raw or base64 output (requires ext-gd)
 *
 * @see https://php.net/manual/book.image.php
 *
 * @deprecated 5.0.0 this class will be made abstract in future versions,
 *                   calling it directly is deprecated - use one of the child classes instead
 * @see https://github.com/chillerlan/php-qrcode/issues/223
 */
class QRGdImage extends QROutputAbstract
{
    /**
     * The GD image resource
     *
     * @see imagecreatetruecolor()
     * @var resource|\GdImage
     *
     * @todo: add \GdImage type in v6
     */
    protected $image;
    /**
     * The allocated background color
     *
     * @see \imagecolorallocate()
     */
    protected int $background;
    /**
     * Whether we're running in upscale mode (scale < 20)
     *
     * @see \chillerlan\QRCode\QROptions::$drawCircularModules
     */
    protected bool $upscaled = \false;
    /**
     * @inheritDoc
     *
     * @throws \chillerlan\QRCode\Output\QRCodeOutputException
     * @noinspection PhpMissingParentConstructorInspection
     */
    public function __construct(SettingsContainerInterface $options, QRMatrix $matrix)
    {
        $this->options = $options;
        $this->matrix = $matrix;
        $this->checkGD();
        if ($this->options->invertMatrix) {
            $this->matrix->invert();
        }
        $this->copyVars();
        $this->setMatrixDimensions();
    }
    /**
     * Checks whether GD is installed and if the given mode is supported
     *
     * @return void
     * @throws \chillerlan\QRCode\Output\QRCodeOutputException
     * @codeCoverageIgnore
     */
    protected function checkGD() : void
    {
        if (!extension_loaded('gd')) {
            throw new QRCodeOutputException('ext-gd not loaded');
        }
        $modes = [self::GDIMAGE_BMP => IMG_BMP, self::GDIMAGE_GIF => IMG_GIF, self::GDIMAGE_JPG => IMG_JPG, self::GDIMAGE_PNG => IMG_PNG, self::GDIMAGE_WEBP => IMG_WEBP];
        // likely using default or custom output
        if (!isset($modes[$this->options->outputType])) {
            return;
        }
        $mode = $modes[$this->options->outputType];
        if ((imagetypes() & $mode) !== $mode) {
            throw new QRCodeOutputException(sprintf('output mode "%s" not supported', $this->options->outputType));
        }
    }
    /**
     * @inheritDoc
     */
    public static function moduleValueIsValid($value) : bool
    {
        if (!is_array($value) || count($value) < 3) {
            return \false;
        }
        // check the first 3 values of the array
        foreach (array_values($value) as $i => $val) {
            if ($i > 2) {
                break;
            }
            if (!is_numeric($val)) {
                return \false;
            }
        }
        return \true;
    }
    /**
     * @param array $value
     *
     * @inheritDoc
     * @throws \chillerlan\QRCode\Output\QRCodeOutputException
     */
    protected function prepareModuleValue($value) : int
    {
        $values = [];
        foreach (array_values($value) as $i => $val) {
            if ($i > 2) {
                break;
            }
            $values[] = max(0, min(255, intval($val)));
        }
        /** @phan-suppress-next-line PhanParamTooFewInternalUnpack */
        $color = imagecolorallocate($this->image, ...$values);
        if ($color === \false) {
            throw new QRCodeOutputException('could not set color: imagecolorallocate() error');
        }
        return $color;
    }
    /**
     * @inheritDoc
     */
    protected function getDefaultModuleValue(bool $isDark) : int
    {
        return $this->prepareModuleValue($isDark ? [0, 0, 0] : [255, 255, 255]);
    }
    /**
     * @inheritDoc
     *
     * @return string|resource|\GdImage
     *
     * @phan-suppress PhanUndeclaredTypeReturnType, PhanTypeMismatchReturn
     * @throws \ErrorException
     */
    public function dump(?string $file = null)
    {
        set_error_handler(function (int $errno, string $errstr) : bool {
            throw new ErrorException($errstr, $errno);
        });
        $this->image = $this->createImage();
        // set module values after image creation because we need the GdImage instance
        $this->setModuleValues();
        $this->setBgColor();
        imagefilledrectangle($this->image, 0, 0, $this->length, $this->length, $this->background);
        $this->drawImage();
        if ($this->upscaled) {
            // scale down to the expected size
            $this->image = imagescale($this->image, $this->length / 10, $this->length / 10);
            $this->upscaled = \false;
        }
        // set transparency after scaling, otherwise it would be undone
        // @see https://www.php.net/manual/en/function.imagecolortransparent.php#77099
        $this->setTransparencyColor();
        if ($this->options->returnResource) {
            restore_error_handler();
            return $this->image;
        }
        $imageData = $this->dumpImage();
        $this->saveToFile($imageData, $file);
        if ($this->options->outputBase64) {
            // @todo: remove mime parameter in v6
            $imageData = $this->toBase64DataURI($imageData, 'image/' . $this->options->outputType);
        }
        restore_error_handler();
        return $imageData;
    }
    /**
     * Creates a new GdImage resource and scales it if necessary
     *
     * we're scaling the image up in order to draw crisp round circles, otherwise they appear square-y on small scales
     *
     * @see https://github.com/chillerlan/php-qrcode/issues/23
     *
     * @return \GdImage|resource
     */
    protected function createImage()
    {
        if ($this->drawCircularModules && $this->options->gdImageUseUpscale && $this->options->scale < 20) {
            // increase the initial image size by 10
            $this->length *= 10;
            $this->scale *= 10;
            $this->upscaled = \true;
        }
        return imagecreatetruecolor($this->length, $this->length);
    }
    /**
     * Sets the background color
     */
    protected function setBgColor() : void
    {
        if (isset($this->background)) {
            return;
        }
        if ($this::moduleValueIsValid($this->options->bgColor)) {
            $this->background = $this->prepareModuleValue($this->options->bgColor);
            return;
        }
        $this->background = $this->prepareModuleValue([255, 255, 255]);
    }
    /**
     * Sets the transparency color
     */
    protected function setTransparencyColor() : void
    {
        // @todo: the jpg skip can be removed in v6
        if ($this->options->outputType === QROutputInterface::GDIMAGE_JPG || !$this->options->imageTransparent) {
            return;
        }
        $transparencyColor = $this->background;
        if ($this::moduleValueIsValid($this->options->transparencyColor)) {
            $transparencyColor = $this->prepareModuleValue($this->options->transparencyColor);
        }
        imagecolortransparent($this->image, $transparencyColor);
    }
    /**
     * Draws the QR image
     */
    protected function drawImage() : void
    {
        foreach ($this->matrix->getMatrix() as $y => $row) {
            foreach ($row as $x => $M_TYPE) {
                $this->module($x, $y, $M_TYPE);
            }
        }
    }
    /**
     * Creates a single QR pixel with the given settings
     */
    protected function module(int $x, int $y, int $M_TYPE) : void
    {
        if (!$this->drawLightModules && !$this->matrix->isDark($M_TYPE)) {
            return;
        }
        $color = $this->getModuleValue($M_TYPE);
        if ($this->drawCircularModules && !$this->matrix->checkTypeIn($x, $y, $this->keepAsSquare)) {
            imagefilledellipse($this->image, $x * $this->scale + intdiv($this->scale, 2), $y * $this->scale + intdiv($this->scale, 2), (int) ($this->circleDiameter * $this->scale), (int) ($this->circleDiameter * $this->scale), $color);
            return;
        }
        imagefilledrectangle($this->image, $x * $this->scale, $y * $this->scale, ($x + 1) * $this->scale, ($y + 1) * $this->scale, $color);
    }
    /**
     * Renders the image with the gdimage function for the desired output
     *
     * @see \imagebmp()
     * @see \imagegif()
     * @see \imagejpeg()
     * @see \imagepng()
     * @see \imagewebp()
     *
     * @todo: v6.0: make abstract and call from child classes
     * @see https://github.com/chillerlan/php-qrcode/issues/223
     * @codeCoverageIgnore
     */
    protected function renderImage() : void
    {
        switch ($this->options->outputType) {
            case QROutputInterface::GDIMAGE_BMP:
                imagebmp($this->image, null, $this->options->quality > 0);
                break;
            case QROutputInterface::GDIMAGE_GIF:
                imagegif($this->image);
                break;
            case QROutputInterface::GDIMAGE_JPG:
                imagejpeg($this->image, null, max(-1, min(100, $this->options->quality)));
                break;
            case QROutputInterface::GDIMAGE_WEBP:
                imagewebp($this->image, null, max(-1, min(100, $this->options->quality)));
                break;
            // silently default to png output
            case QROutputInterface::GDIMAGE_PNG:
            default:
                imagepng($this->image, null, max(-1, min(9, $this->options->quality)));
        }
    }
    /**
     * Creates the final image by calling the desired GD output function
     *
     * @throws \chillerlan\QRCode\Output\QRCodeOutputException
     */
    protected function dumpImage() : string
    {
        $exception = null;
        $imageData = null;
        ob_start();
        try {
            $this->renderImage();
            $imageData = ob_get_contents();
        } catch (Throwable $e) {
            $exception = $e;
        }
        // @codeCoverageIgnoreEnd
        ob_end_clean();
        // throw here in case an exception happened within the output buffer
        if ($exception instanceof Throwable) {
            throw new QRCodeOutputException($exception->getMessage());
        }
        return $imageData;
    }
}