<?php

/**
 * Class QRFpdf
 *
 * @created      03.06.2020
 * @author       Maximilian Kresse
 * @license      MIT
 *
 * @see https://github.com/chillerlan/php-qrcode/pull/49
 */
namespace WCPOS\Vendor\chillerlan\QRCode\Output;

use WCPOS\Vendor\chillerlan\QRCode\Data\QRMatrix;
use WCPOS\Vendor\chillerlan\Settings\SettingsContainerInterface;
use WCPOS\Vendor\FPDF;
use function array_values, class_exists, count, intval, is_array, is_numeric, max, min;
/**
 * QRFpdf output module (requires fpdf)
 *
 * @see https://github.com/Setasign/FPDF
 * @see http://www.fpdf.org/
 */
class QRFpdf extends QROutputAbstract
{
    public const MIME_TYPE = 'application/pdf';
    protected FPDF $fpdf;
    protected ?array $prevColor = null;
    /**
     * QRFpdf constructor.
     *
     * @throws \chillerlan\QRCode\Output\QRCodeOutputException
     */
    public function __construct(SettingsContainerInterface $options, QRMatrix $matrix)
    {
        if (!class_exists(FPDF::class)) {
            // @codeCoverageIgnoreStart
            throw new QRCodeOutputException('The QRFpdf output requires FPDF (https://github.com/Setasign/FPDF)' . ' as dependency but the class "\\FPDF" couldn\'t be found.');
            // @codeCoverageIgnoreEnd
        }
        parent::__construct($options, $matrix);
    }
    /**
     * @inheritDoc
     */
    public static function moduleValueIsValid($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) : array
    {
        $values = [];
        foreach (array_values($value) as $i => $val) {
            if ($i > 2) {
                break;
            }
            $values[] = max(0, min(255, intval($val)));
        }
        if (count($values) !== 3) {
            throw new QRCodeOutputException('invalid color value');
        }
        return $values;
    }
    /**
     * @inheritDoc
     */
    protected function getDefaultModuleValue(bool $isDark) : array
    {
        return $isDark ? [0, 0, 0] : [255, 255, 255];
    }
    /**
     * Initializes an FPDF instance
     */
    protected function initFPDF() : FPDF
    {
        $fpdf = new FPDF('P', $this->options->fpdfMeasureUnit, $this->getOutputDimensions());
        $fpdf->AddPage();
        return $fpdf;
    }
    /**
     * @inheritDoc
     *
     * @return string|\FPDF
     */
    public function dump(?string $file = null, ?FPDF $fpdf = null)
    {
        $this->fpdf = $fpdf ?? $this->initFPDF();
        if ($this::moduleValueIsValid($this->options->bgColor)) {
            $bgColor = $this->prepareModuleValue($this->options->bgColor);
            [$width, $height] = $this->getOutputDimensions();
            /** @phan-suppress-next-line PhanParamTooFewUnpack */
            $this->fpdf->SetFillColor(...$bgColor);
            $this->fpdf->Rect(0, 0, $width, $height, 'F');
        }
        $this->prevColor = null;
        foreach ($this->matrix->getMatrix() as $y => $row) {
            foreach ($row as $x => $M_TYPE) {
                $this->module($x, $y, $M_TYPE);
            }
        }
        if ($this->options->returnResource) {
            return $this->fpdf;
        }
        $pdfData = $this->fpdf->Output('S');
        $this->saveToFile($pdfData, $file);
        if ($this->options->outputBase64) {
            $pdfData = $this->toBase64DataURI($pdfData);
        }
        return $pdfData;
    }
    /**
     * Renders a single module
     */
    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 ($color !== null && $color !== $this->prevColor) {
            /** @phan-suppress-next-line PhanParamTooFewUnpack */
            $this->fpdf->SetFillColor(...$color);
            $this->prevColor = $color;
        }
        $this->fpdf->Rect($x * $this->scale, $y * $this->scale, $this->scale, $this->scale, 'F');
    }
}