<?php

declare(strict_types=1);

require_once __DIR__ . '/../../vendor/autoload.php';

use App\Framework\QrCode\QrCodeGenerator;
use App\Framework\QrCode\ValueObjects\ErrorCorrectionLevel;
use App\Framework\QrCode\ValueObjects\QrCodeConfig;
use App\Framework\QrCode\ValueObjects\QrCodeVersion;
use App\Framework\QrCode\ValueObjects\EncodingMode;

echo "=== QR Code Reference Comparison ===\n\n";

// Bekannte Referenz-QR-Code-Daten für "HELLO WORLD"
// Diese sind aus der ISO/IEC 18004 Spezifikation oder bekannten QR-Code-Generatoren
$data = "HELLO WORLD";

echo "Generiere für: '{$data}'\n\n";

$config = new QrCodeConfig(
    version: QrCodeVersion::fromNumber(1),
    errorCorrectionLevel: ErrorCorrectionLevel::M,
    encodingMode: EncodingMode::BYTE
);

$matrix = QrCodeGenerator::generate($data, $config);
$size = $matrix->getSize();

// Erstelle eine kompakte Hex-Darstellung
echo "=== Matrix als Hex (jede Zeile) ===\n";
for ($row = 0; $row < $size; $row++) {
    $bits = '';
    for ($col = 0; $col < $size; $col++) {
        $bits .= $matrix->getModuleAt($row, $col)->isDark() ? '1' : '0';
    }

    // Konvertiere zu Hex (padding auf 24 bits = 3 bytes = 6 hex chars)
    $bits = str_pad($bits, 24, '0');
    $hex = '';
    for ($i = 0; $i < strlen($bits); $i += 4) {
        $nibble = substr($bits, $i, 4);
        $hex .= dechex(bindec($nibble));
    }

    echo sprintf("Row %2d: %s\n", $row, $hex);
}

echo "\n=== Prüfe kritische Bereiche ===\n\n";

// 1. Version Information (sollte für V1 nicht vorhanden sein)
echo "Version Information: N/A (Version 1)\n\n";

// 2. Format Information
echo "Format Information:\n";
$formatCols = [0, 1, 2, 3, 4, 5, 7, 8, 20, 19, 18, 17, 16, 15, 14];
$formatBits = '';
foreach ($formatCols as $col) {
    $formatBits .= $matrix->getModuleAt(8, $col)->isDark() ? '1' : '0';
}
echo "Horizontal (Row 8): {$formatBits}\n";

$formatRows = [20, 19, 18, 17, 16, 15, 14, 8, 7, 5, 4, 3, 2, 1, 0];
$formatBitsV = '';
foreach ($formatRows as $row) {
    $formatBitsV .= $matrix->getModuleAt($row, 8)->isDark() ? '1' : '0';
}
echo "Vertical (Col 8):   {$formatBitsV}\n";
echo "Match: " . ($formatBits === $formatBitsV ? "✅ Yes" : "❌ No") . "\n\n";

// 3. Erstelle ein "visually perfect" Bild
echo "=== Generiere perfekt ausgerichtetes PNG ===\n";

$scale = 20;
$quietZone = 4;
$totalSize = ($size + 2 * $quietZone) * $scale;

$image = imagecreate($totalSize, $totalSize);
$white = imagecolorallocate($image, 255, 255, 255);
$black = imagecolorallocate($image, 0, 0, 0);

// Fill background
imagefill($image, 0, 0, $white);

// Draw each module as perfect square
for ($row = 0; $row < $size; $row++) {
    for ($col = 0; $col < $size; $col++) {
        if ($matrix->getModuleAt($row, $col)->isDark()) {
            $x = ($quietZone + $col) * $scale;
            $y = ($quietZone + $row) * $scale;

            // Draw perfect square (no gaps)
            for ($dy = 0; $dy < $scale; $dy++) {
                for ($dx = 0; $dx < $scale; $dx++) {
                    imagesetpixel($image, $x + $dx, $y + $dy, $black);
                }
            }
        }
    }
}

$filepath = '/var/www/html/public/qrcode-perfect-pixel.png';
imagepng($image, $filepath, 0); // 0 = no compression

echo "✅ Perfect PNG: qrcode-perfect-pixel.png\n";
echo "   Size: {$totalSize}x{$totalSize}px\n";
echo "   No compression, pixel-perfect rendering\n\n";

// Verify das generierte Bild
$verify = imagecreatefrompng($filepath);
$vWidth = imagesx($verify);
$vHeight = imagesy($verify);

echo "Verification:\n";
echo "  Image dimensions: {$vWidth}x{$vHeight}\n";

// Check quiet zone
$qzPixel = imagecolorat($verify, 0, 0);
$qzColor = imagecolorsforindex($verify, $qzPixel);
echo "  Quiet zone (0,0): RGB({$qzColor['red']}, {$qzColor['green']}, {$qzColor['blue']})\n";

// Check first finder module
$fmX = ($quietZone * $scale) + ($scale / 2);
$fmY = ($quietZone * $scale) + ($scale / 2);
$fmPixel = imagecolorat($verify, (int)$fmX, (int)$fmY);
$fmColor = imagecolorsforindex($verify, $fmPixel);
echo "  Finder module: RGB({$fmColor['red']}, {$fmColor['green']}, {$fmColor['blue']})\n\n";

// Generiere auch BMP (manchmal besser für Scanner)
echo "=== Generiere BMP Version ===\n";
$bmpPath = '/var/www/html/public/qrcode-test.bmp';

// BMP Header erstellen (Windows 24-bit BMP)
$filesize = 54 + ($totalSize * $totalSize * 3); // Header + pixel data
$bmpData = pack('v', 0x4D42); // 'BM'
$bmpData .= pack('V', $filesize);
$bmpData .= pack('V', 0); // Reserved
$bmpData .= pack('V', 54); // Offset to pixel data

// DIB Header (BITMAPINFOHEADER)
$bmpData .= pack('V', 40); // Header size
$bmpData .= pack('V', $totalSize); // Width
$bmpData .= pack('V', $totalSize); // Height
$bmpData .= pack('v', 1); // Planes
$bmpData .= pack('v', 24); // Bits per pixel
$bmpData .= pack('V', 0); // Compression
$bmpData .= pack('V', $totalSize * $totalSize * 3); // Image size
$bmpData .= pack('V', 2835); // X pixels per meter
$bmpData .= pack('V', 2835); // Y pixels per meter
$bmpData .= pack('V', 0); // Colors used
$bmpData .= pack('V', 0); // Important colors

// Pixel data (bottom-up, BGR format)
for ($y = $totalSize - 1; $y >= 0; $y--) {
    for ($x = 0; $x < $totalSize; $x++) {
        $rgb = imagecolorat($verify, $x, $y);
        $colors = imagecolorsforindex($verify, $rgb);
        $bmpData .= chr($colors['blue']);
        $bmpData .= chr($colors['green']);
        $bmpData .= chr($colors['red']);
    }
    // BMP rows must be padded to multiples of 4 bytes
    $padding = (4 - (($totalSize * 3) % 4)) % 4;
    $bmpData .= str_repeat("\0", $padding);
}

file_put_contents($bmpPath, $bmpData);
echo "✅ BMP created: qrcode-test.bmp\n";
echo "   Size: " . filesize($bmpPath) . " bytes\n";