<?php

declare(strict_types=1);

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

use App\Framework\QrCode\QrCodeGenerator;
use App\Framework\QrCode\QrCodeRenderer;
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 "=== Complete QR Code Test ===\n\n";

$testData = 'https://localhost/';
echo "Test data: {$testData}\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\n";

// Extract and verify format information
$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';
}

$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 "Format Information:\n";
echo "  Horizontal bits: {$formatH}\n";
echo "  EC Level: {$ecLevel} (expected: M)\n";
echo "  Mask Pattern: {$maskPattern}\n\n";

// Verify data can be read back correctly
use App\Framework\QrCode\Masking\MaskPattern as MaskPatternEnum;

$mask = match($maskPattern) {
    0 => MaskPatternEnum::PATTERN_0,
    1 => MaskPatternEnum::PATTERN_1,
    2 => MaskPatternEnum::PATTERN_2,
    3 => MaskPatternEnum::PATTERN_3,
    4 => MaskPatternEnum::PATTERN_4,
    5 => MaskPatternEnum::PATTERN_5,
    6 => MaskPatternEnum::PATTERN_6,
    7 => MaskPatternEnum::PATTERN_7,
};

// Read first few data bits
$dataBits = [];
$bitCount = 0;

for ($col = $size - 1; $col >= 1 && $bitCount < 40; $col -= 2) {
    if ($col === 6) {
        $col--;
    }
    
    $upward = ((int) (($size - 1 - $col) / 2) % 2) === 0;
    
    for ($i = 0; $i < $size && $bitCount < 40; $i++) {
        $row = $upward ? ($size - 1 - $i) : $i;
        
        for ($c = 0; $c < 2 && $bitCount < 40; $c++) {
            $currentCol = $col - $c;
            
            // Skip function patterns
            if (($row <= 8 && $currentCol <= 8) ||
                ($row <= 7 && $currentCol >= $size - 8) ||
                ($row >= $size - 8 && $currentCol <= 7) ||
                $row === 6 || $currentCol === 6 ||
                ($row === 8 && (($currentCol >= 0 && $currentCol <= 5) || $currentCol === 7 || $currentCol === 8 || $currentCol >= $size - 8)) ||
                ($currentCol === 8 && (($row >= 0 && $row <= 5) || $row === 7 || $row === 8 || $row >= $size - 7)) ||
                ($row === 13 && $currentCol === 8)) {
                continue;
            }
            
            $maskedBit = $matrix->getModuleAt($row, $currentCol)->isDark() ? 1 : 0;
            $unmaskedBit = $mask->shouldInvert($row, $currentCol) ? (1 - $maskedBit) : $maskedBit;
            $dataBits[] = $unmaskedBit;
            $bitCount++;
        }
    }
}

// Convert to bytes
$codewords = [];
for ($i = 0; $i < count($dataBits); $i += 8) {
    if ($i + 8 <= count($dataBits)) {
        $byte = '';
        for ($j = 0; $j < 8; $j++) {
            $byte .= (string)$dataBits[$i + $j];
        }
        $codewords[] = bindec($byte);
    }
}

echo "Read back data:\n";
echo "  First byte (mode): {$codewords[0]} (expected: 4 for byte mode)\n";
if (count($codewords) >= 2) {
    echo "  Second byte (count): {$codewords[1]} (expected: " . strlen($testData) . ")\n";
}

// Generate SVG
$renderer = new QrCodeRenderer();
$svg = $renderer->renderSvg($matrix);
$svgFile = __DIR__ . '/complete-qrcode-test.svg';
file_put_contents($svgFile, $svg);

$dataUri = $renderer->toDataUrl($matrix);
echo "\n✅ QR Code generated and saved to: {$svgFile}\n";
echo "Data URI length: " . strlen($dataUri) . " characters\n";
echo "\nPlease test this QR code with a scanner app.\n";
echo "If it still doesn't work, the issue may be in Reed-Solomon encoding.\n";