<?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 "=== Detailed QR Code Comparison ===\n\n";

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

$ourMatrix = QrCodeGenerator::generate("HELLO WORLD", $config);
$size = 21;

// Load Python reference
$pythonImage = imagecreatefrompng('/var/www/html/public/qrcode-python-large.png');
if (!$pythonImage) {
    die("Could not load Python reference image\n");
}

// Function to check if a module is dark in the Python image
function isPythonModuleDark($image, $row, $col): bool {
    $scale = 20;
    $quietZone = 4;
    $x = ($quietZone + $col) * $scale + ($scale / 2);
    $y = ($quietZone + $row) * $scale + ($scale / 2);
    
    $rgb = imagecolorat($image, (int)$x, (int)$y);
    $r = ($rgb >> 16) & 0xFF;
    
    return $r < 128; // Black if RGB < 128
}

echo "Checking critical areas:\n\n";

// 1. Finder patterns
echo "1. Finder Patterns:\n";
$finderErrors = 0;
$finderPositions = [
    [0, 0], [0, 14], [14, 0]  // Top-left, top-right, bottom-left
];

foreach ($finderPositions as [$startRow, $startCol]) {
    for ($r = 0; $r < 7; $r++) {
        for ($c = 0; $c < 7; $c++) {
            $row = $startRow + $r;
            $col = $startCol + $c;
            
            $ourDark = $ourMatrix->getModuleAt($row, $col)->isDark();
            $pythonDark = isPythonModuleDark($pythonImage, $row, $col);
            
            if ($ourDark !== $pythonDark) {
                $finderErrors++;
            }
        }
    }
}
echo "   Errors: $finderErrors\n";
echo "   Status: " . ($finderErrors === 0 ? "✅ OK" : "❌ MISMATCH") . "\n\n";

// 2. Timing patterns
echo "2. Timing Patterns:\n";
$timingErrors = 0;
for ($i = 8; $i < 13; $i++) {
    // Horizontal timing (row 6)
    $ourDark = $ourMatrix->getModuleAt(6, $i)->isDark();
    $pythonDark = isPythonModuleDark($pythonImage, 6, $i);
    if ($ourDark !== $pythonDark) $timingErrors++;
    
    // Vertical timing (col 6)
    $ourDark = $ourMatrix->getModuleAt($i, 6)->isDark();
    $pythonDark = isPythonModuleDark($pythonImage, $i, 6);
    if ($ourDark !== $pythonDark) $timingErrors++;
}
echo "   Errors: $timingErrors\n";
echo "   Status: " . ($timingErrors === 0 ? "✅ OK" : "❌ MISMATCH") . "\n\n";

// 3. Format information
echo "3. Format Information:\n";
$formatErrors = 0;
$formatCols = [0, 1, 2, 3, 4, 5, 7, 8, 20, 19, 18, 17, 16, 15, 14];
foreach ($formatCols as $col) {
    $ourDark = $ourMatrix->getModuleAt(8, $col)->isDark();
    $pythonDark = isPythonModuleDark($pythonImage, 8, $col);
    if ($ourDark !== $pythonDark) {
        $formatErrors++;
        echo "   Col $col: Our=" . ($ourDark ? '1' : '0') . " Python=" . ($pythonDark ? '1' : '0') . "\n";
    }
}
echo "   Errors: $formatErrors\n";
echo "   Status: " . ($formatErrors === 0 ? "✅ OK" : "❌ MISMATCH") . "\n\n";

// 4. Dark module
echo "4. Dark Module (fixed at row 13, col 8):\n";
$ourDark = $ourMatrix->getModuleAt(13, 8)->isDark();
$pythonDark = isPythonModuleDark($pythonImage, 13, 8);
echo "   Our: " . ($ourDark ? 'Dark' : 'Light') . "\n";
echo "   Python: " . ($pythonDark ? 'Dark' : 'Light') . "\n";
echo "   Status: " . ($ourDark === $pythonDark ? "✅ OK" : "❌ MISMATCH") . "\n\n";

// 5. Data area
echo "5. Data Area:\n";
$dataErrors = 0;
$totalDataModules = 0;

for ($row = 0; $row < $size; $row++) {
    for ($col = 0; $col < $size; $col++) {
        // Skip function patterns
        if (($row < 9 && $col < 9) || // Top-left finder + separators
            ($row < 9 && $col >= 13) || // Top-right finder + separators
            ($row >= 13 && $col < 9) || // Bottom-left finder + separators
            $row === 6 || $col === 6 || // Timing patterns
            ($row === 8) || ($col === 8)) { // Format info
            continue;
        }
        
        $totalDataModules++;
        $ourDark = $ourMatrix->getModuleAt($row, $col)->isDark();
        $pythonDark = isPythonModuleDark($pythonImage, $row, $col);
        
        if ($ourDark !== $pythonDark) {
            $dataErrors++;
        }
    }
}

echo "   Total data modules: $totalDataModules\n";
echo "   Errors: $dataErrors\n";
echo "   Match rate: " . number_format(($totalDataModules - $dataErrors) / $totalDataModules * 100, 1) . "%\n";
echo "   Status: " . ($dataErrors === 0 ? "✅ OK" : "❌ MISMATCH") . "\n\n";

echo "=== Summary ===\n";
$totalErrors = $finderErrors + $timingErrors + $formatErrors + $dataErrors;
echo "Total errors: $totalErrors\n";

if ($totalErrors === 0) {
    echo "✅ MATRICES MATCH PERFECTLY!\n";
} else {
    echo "❌ DIFFERENCES FOUND\n";
    echo "\nMost likely causes:\n";
    if ($formatErrors > 0) echo "- Format information still incorrect\n";
    if ($dataErrors > 0) echo "- Data encoding or masking issue\n";
    if ($finderErrors > 0) echo "- Finder pattern issue\n";
    if ($timingErrors > 0) echo "- Timing pattern issue\n";
}

imagedestroy($pythonImage);