<?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 "=== Generating PNG QR Codes ===\n\n";

// Create output directory
$outputDir = __DIR__ . '/test-qrcodes';
if (!is_dir($outputDir)) {
    mkdir($outputDir, 0755, true);
}

// Test data
$testCases = [
    ['data' => 'HELLO WORLD', 'filename' => 'hello-world.png'],
    ['data' => 'A', 'filename' => 'single-char.png'],
    ['data' => 'HELLO', 'filename' => 'hello.png'],
    ['data' => 'https://example.com', 'filename' => 'url.png'],
    ['data' => 'Test QR Code', 'filename' => 'test-text.png'],
];

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

foreach ($testCases as $testCase) {
    echo "Generating: '{$testCase['data']}'\n";
    
    $matrix = QrCodeGenerator::generate($testCase['data'], $config);
    $size = $matrix->getSize();
    
    // Generate PNG with good quality
    $moduleSize = 20; // 20px per module
    $quietZone = 4;   // 4 modules quiet zone
    $canvasSize = ($size + 2 * $quietZone) * $moduleSize;
    
    // Create image
    $image = imagecreatetruecolor($canvasSize, $canvasSize);
    $white = imagecolorallocate($image, 255, 255, 255);
    $black = imagecolorallocate($image, 0, 0, 0);
    
    // Fill with white (background)
    imagefill($image, 0, 0, $white);
    
    // Draw quiet zone (already white)
    // Draw modules
    $offset = $quietZone * $moduleSize;
    
    for ($row = 0; $row < $size; $row++) {
        for ($col = 0; $col < $size; $col++) {
            $isDark = $matrix->getModuleAt($row, $col)->isDark();
            
            if ($isDark) {
                $x = $offset + ($col * $moduleSize);
                $y = $offset + ($row * $moduleSize);
                
                imagefilledrectangle(
                    $image,
                    $x,
                    $y,
                    $x + $moduleSize - 1,
                    $y + $moduleSize - 1,
                    $black
                );
            }
        }
    }
    
    // Save PNG
    $filepath = $outputDir . '/' . $testCase['filename'];
    imagepng($image, $filepath, 0); // 0 = no compression for best quality
    imagedestroy($image);
    
    $fileSize = filesize($filepath);
    echo "  ✅ Saved: {$testCase['filename']} ({$fileSize} bytes, {$canvasSize}x{$canvasSize}px)\n\n";
}

echo "=== Summary ===\n";
echo "PNG QR codes generated successfully!\n";
echo "PNG format is more reliable for QR code scanners than SVG.\n";
echo "Output directory: {$outputDir}\n";