<?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 "=== Full QR Code Validation ===\n\n";

$testData = 'https://localhost/';
echo "Test data: {$testData}\n";
echo "Data length: " . strlen($testData) . " bytes\n\n";

$config = QrCodeConfig::autoSize($testData, ErrorCorrectionLevel::M);
$matrix = QrCodeGenerator::generate($testData, $config);

$size = $matrix->getSize();
$version = $matrix->getVersion()->getVersionNumber();

echo "Generated QR Code:\n";
echo "  Version: {$version}\n";
echo "  Size: {$size}x{$size}\n";
echo "  Error Correction: M\n";
echo "  Encoding Mode: Byte\n\n";

// Check format information
echo "=== Format Information Check ===\n";
$formatCols = [0, 1, 2, 3, 4, 5, 7, 8, $size - 1, $size - 2, $size - 3, $size - 4, $size - 5, $size - 6, $size - 7];
$formatH = '';
foreach ($formatCols as $col) {
    $formatH .= $matrix->getModuleAt(8, $col)->isDark() ? '1' : '0';
}

$formatRows = [$size - 1, $size - 2, $size - 3, $size - 4, $size - 5, $size - 6, $size - 7, 8, 7, 5, 4, 3, 2, 1, 0];
$formatV = '';
foreach ($formatRows as $row) {
    $formatV .= $matrix->getModuleAt($row, 8)->isDark() ? '1' : '0';
}

echo "Horizontal format: {$formatH}\n";
echo "Vertical format:   {$formatV}\n";
echo "Match: " . ($formatH === $formatV ? "✅ YES" : "❌ NO") . "\n\n";

// Decode format info
$xorMask = "101010000010010";
$unmasked = '';
for ($i = 0; $i < 15; $i++) {
    $unmasked .= (int)$formatH[$i] ^ (int)$xorMask[$i];
}

$ecBits = substr($unmasked, 0, 2);
$maskBits = substr($unmasked, 2, 3);
$ecLevel = match($ecBits) {'01' => 'L', '00' => 'M', '11' => 'Q', '10' => 'H', default => 'UNKNOWN'};
$maskPattern = bindec($maskBits);

echo "Decoded format info:\n";
echo "  EC Level: {$ecLevel}\n";
echo "  Mask Pattern: {$maskPattern}\n\n";

// Check finder patterns
echo "=== Finder Pattern Check ===\n";
$topLeft = $matrix->getModuleAt(0, 0)->isDark() && 
           $matrix->getModuleAt(6, 6)->isDark();
$topRight = $matrix->getModuleAt(0, $size - 7)->isDark() &&
            $matrix->getModuleAt(6, $size - 1)->isDark();
$bottomLeft = $matrix->getModuleAt($size - 7, 0)->isDark() &&
              $matrix->getModuleAt($size - 1, 6)->isDark();

echo "Top-left: " . ($topLeft ? "✅" : "❌") . "\n";
echo "Top-right: " . ($topRight ? "✅" : "❌") . "\n";
echo "Bottom-left: " . ($bottomLeft ? "✅" : "❌") . "\n\n";

// Check dark module
$darkModuleRow = 4 * $version + 9;
$darkModule = $matrix->getModuleAt($darkModuleRow, 8)->isDark();
echo "Dark module at ({$darkModuleRow}, 8): " . ($darkModule ? "✅ Dark" : "❌ Light") . "\n\n";

// Check timing patterns
echo "=== Timing Pattern Check ===\n";
$timingRow = '';
$timingCol = '';
for ($i = 8; $i < 13; $i++) {
    $timingRow .= $matrix->getModuleAt(6, $i)->isDark() ? '1' : '0';
    $timingCol .= $matrix->getModuleAt($i, 6)->isDark() ? '1' : '0';
}
echo "Row 6 timing: {$timingRow} (should alternate)\n";
echo "Col 6 timing: {$timingCol} (should alternate)\n\n";

// Generate SVG
$renderer = new \App\Framework\QrCode\QrCodeRenderer();
$svg = $renderer->renderSvg($matrix);
$svgFile = __DIR__ . '/qrcode-validation.svg';
file_put_contents($svgFile, $svg);
echo "SVG saved to: {$svgFile}\n\n";

echo "=== Summary ===\n";
$issues = [];
if ($formatH !== $formatV) $issues[] = "Format info mismatch";
if (!$topLeft || !$topRight || !$bottomLeft) $issues[] = "Finder pattern issues";
if (!$darkModule) $issues[] = "Dark module missing";

if (empty($issues)) {
    echo "✅ All structural checks passed\n";
    echo "⚠️  If QR code still doesn't scan, the issue may be:\n";
    echo "   1. Data encoding/placement order\n";
    echo "   2. Mask application\n";
    echo "   3. Reed-Solomon error correction\n";
} else {
    echo "❌ Issues found:\n";
    foreach ($issues as $issue) {
        echo "   - {$issue}\n";
    }
}