<?php

declare(strict_types=1);

namespace App\Application\Controller;

use App\Framework\Attributes\Route;
use App\Framework\Http\Headers;
use App\Framework\Http\HttpRequest;
use App\Framework\Http\HttpResponse;
use App\Framework\Http\Method;
use App\Framework\Http\Status;
use App\Framework\QrCode\ErrorCorrectionLevel;
use App\Framework\QrCode\QrCodeGenerator;
use App\Framework\QrCode\QrCodeVersion;
use App\Framework\Router\Result\HtmlResult;

/**
 * QR Code Test Controller
 *
 * Displays example QR codes for testing purposes in development
 */
final readonly class QrCodeTestController
{
    public function __construct(
        private QrCodeGenerator $qrCodeGenerator
    ) {
    }

    /**
     * Show QR code test page with multiple examples
     */
    #[Route(path: '/test/qr-codes', method: Method::GET)]
    public function showTestPage(HttpRequest $request): HtmlResult
    {
        // Generate various test QR codes
        $examples = [
            [
                'title' => 'Simple Text',
                'data' => 'Hello, World!',
                'description' => 'Basic text QR code (Version 1)',
                'version' => null,
                'errorLevel' => null,
            ],
            [
                'title' => 'URL Example',
                'data' => 'https://example.com/test?param=value',
                'description' => 'Website URL QR code',
                'version' => null,
                'errorLevel' => ErrorCorrectionLevel::M,
            ],
            [
                'title' => 'TOTP Example',
                'data' => 'otpauth://totp/TestApp:user@example.com?secret=JBSWY3DPEHPK3PXP&issuer=TestApp&algorithm=SHA1&digits=6&period=30',
                'description' => 'TOTP authenticator setup (Version 3)',
                'version' => QrCodeVersion::forTotp(),
                'errorLevel' => ErrorCorrectionLevel::M,
            ],
            [
                'title' => 'WiFi Connection',
                'data' => 'WIFI:T:WPA;S:TestNetwork;P:password123;H:false;;',
                'description' => 'WiFi connection QR code',
                'version' => null,
                'errorLevel' => ErrorCorrectionLevel::L,
            ],
            [
                'title' => 'Contact Card',
                'data' => 'BEGIN:VCARD\nVERSION:3.0\nFN:John Doe\nTEL:+49123456789\nEMAIL:john@example.com\nEND:VCARD',
                'description' => 'vCard contact information',
                'version' => null,
                'errorLevel' => ErrorCorrectionLevel::M,
            ],
        ];

        $qrCodes = [];

        foreach ($examples as $example) {
            try {
                // Generate SVG
                $svg = $this->qrCodeGenerator->generateSvg(
                    $example['data'],
                    $example['errorLevel'],
                    $example['version']
                );

                // Generate data URI
                $dataUri = $this->qrCodeGenerator->generateDataUri(
                    $example['data'],
                    $example['errorLevel'],
                    $example['version']
                );

                // Analyze the data
                $analysis = $this->qrCodeGenerator->analyzeData($example['data']);

                $qrCodes[] = [
                    'title' => $example['title'],
                    'description' => $example['description'],
                    'data' => $example['data'],
                    'svg' => $svg,
                    'dataUri' => $dataUri,
                    'analysis' => $analysis,
                    'success' => true,
                ];
            } catch (\Exception $e) {
                $qrCodes[] = [
                    'title' => $example['title'],
                    'description' => $example['description'],
                    'data' => $example['data'],
                    'error' => $e->getMessage(),
                    'success' => false,
                ];
            }
        }

        $html = $this->generateTestPageHtml($qrCodes);

        return new HtmlResult($html);
    }

    /**
     * Generate individual QR code for API testing
     */
    #[Route(path: '/test/qr-code', method: Method::GET)]
    public function generateTestQrCode(HttpRequest $request): HtmlResult|HttpResponse
    {
        $data = (string) $request->query->get('data', 'Test QR Code from API');
        $format = $request->query->get('format', 'svg'); // svg or datauri
        $errorLevel = $request->query->get('error', 'M');
        $version = $request->query->get('version');

        try {
            // Parse error correction level
            $errorCorrectionLevel = match($errorLevel) {
                'L' => ErrorCorrectionLevel::L,
                'Q' => ErrorCorrectionLevel::Q,
                'H' => ErrorCorrectionLevel::H,
                default => ErrorCorrectionLevel::M,
            };

            // Parse version if provided
            $qrVersion = $version ? new QrCodeVersion((int) $version) : null;

            if ($format === 'datauri') {
                $result = $this->qrCodeGenerator->generateDataUri($data, $errorCorrectionLevel, $qrVersion);

                return new HtmlResult("<img src=\"{$result}\" alt=\"QR Code\" style=\"max-width: 100%;\"/>");
            } else {
                $svg = $this->qrCodeGenerator->generateSvg($data, $errorCorrectionLevel, $qrVersion);

                return new HttpResponse(
                    Status::OK,
                    new Headers(['Content-Type' => 'image/svg+xml']),
                    $svg
                );
            }
        } catch (\Exception $e) {
            return new HtmlResult(
                "<h1>QR Code Generation Error</h1><p>{$e->getMessage()}</p>",
                Status::INTERNAL_SERVER_ERROR
            );
        }
    }

    /**
     * Generate test page HTML
     * @param array<int, array<string, mixed>> $qrCodes
     */
    private function generateTestPageHtml(array $qrCodes): string
    {
        $examples = '';

        foreach ($qrCodes as $qrCode) {
            if ($qrCode['success']) {
                $analysis = $qrCode['analysis'];
                $analysisHtml = '';
                foreach ($analysis as $key => $value) {
                    $displayValue = is_object($value) ? basename(str_replace('\\', '/', get_class($value))) : $value;
                    $analysisHtml .= "<tr><td>{$key}</td><td>{$displayValue}</td></tr>";
                }

                $examples .= "
                <div class=\"qr-example\">
                    <h3>{$qrCode['title']}</h3>
                    <p class=\"description\">{$qrCode['description']}</p>
                    
                    <div class=\"qr-container\">
                        <div class=\"qr-code\">
                            <img src=\"{$qrCode['dataUri']}\" alt=\"{$qrCode['title']} QR Code\" />
                        </div>
                        
                        <div class=\"qr-info\">
                            <h4>Data:</h4>
                            <pre class=\"data\">" . htmlspecialchars($qrCode['data']) . "</pre>
                            
                            <h4>Analysis:</h4>
                            <table class=\"analysis\">
                                {$analysisHtml}
                            </table>
                        </div>
                    </div>
                </div>";
            } else {
                $examples .= "
                <div class=\"qr-example error\">
                    <h3>{$qrCode['title']} - ERROR</h3>
                    <p class=\"description\">{$qrCode['description']}</p>
                    <p class=\"error-message\">Error: {$qrCode['error']}</p>
                    <pre class=\"data\">" . htmlspecialchars($qrCode['data']) . "</pre>
                </div>";
            }
        }

        return "
<!DOCTYPE html>
<html lang=\"de\">
<head>
    <meta charset=\"UTF-8\">
    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">
    <title>QR Code Test Page</title>
    <style>
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            line-height: 1.6;
            background: #f5f5f5;
        }
        
        h1 {
            color: #333;
            text-align: center;
            margin-bottom: 2rem;
        }
        
        .api-info {
            background: #e3f2fd;
            border: 1px solid #2196f3;
            border-radius: 4px;
            padding: 15px;
            margin-bottom: 2rem;
        }
        
        .api-info h3 {
            margin-top: 0;
            color: #1976d2;
        }
        
        .api-info code {
            background: #fff;
            padding: 2px 6px;
            border-radius: 3px;
            font-family: Monaco, Consolas, monospace;
        }
        
        .qr-example {
            background: white;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 2rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        
        .qr-example.error {
            border-left: 4px solid #f44336;
            background: #ffebee;
        }
        
        .qr-example h3 {
            margin-top: 0;
            color: #333;
        }
        
        .description {
            color: #666;
            font-style: italic;
        }
        
        .error-message {
            color: #d32f2f;
            font-weight: bold;
        }
        
        .qr-container {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        
        .qr-code {
            flex-shrink: 0;
        }
        
        .qr-code img {
            border: 1px solid #ddd;
            border-radius: 4px;
            max-width: 200px;
        }
        
        .qr-info {
            flex: 1;
            min-width: 0;
        }
        
        .qr-info h4 {
            margin: 1rem 0 0.5rem 0;
            color: #555;
        }
        
        .data {
            background: #f8f9fa;
            border: 1px solid #e9ecef;
            border-radius: 4px;
            padding: 10px;
            font-family: Monaco, Consolas, monospace;
            font-size: 12px;
            overflow-x: auto;
            white-space: pre-wrap;
            word-break: break-all;
        }
        
        .analysis {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
        }
        
        .analysis td {
            padding: 4px 8px;
            border-bottom: 1px solid #eee;
        }
        
        .analysis td:first-child {
            font-weight: bold;
            color: #666;
            white-space: nowrap;
        }
        
        @media (max-width: 768px) {
            .qr-container {
                flex-direction: column;
            }
            
            .qr-code img {
                max-width: 150px;
            }
        }
    </style>
</head>
<body>
    <h1>🧪 QR Code Test Page</h1>
    
    <div class=\"api-info\">
        <h3>📡 API Endpoints</h3>
        <p><strong>Dynamic QR Code Generation:</strong><br>
        <code>GET /test/qr-code?data=Your+Data&format=svg&error=M&version=3</code></p>
        
        <p><strong>Parameters:</strong></p>
        <ul>
            <li><code>data</code> - Text to encode (URL encoded)</li>
            <li><code>format</code> - Output format: <code>svg</code> (default) or <code>datauri</code></li>
            <li><code>error</code> - Error correction: <code>L</code>, <code>M</code> (default), <code>Q</code>, <code>H</code></li>
            <li><code>version</code> - QR version 1-40 (auto-detect if omitted)</li>
        </ul>
        
        <p><strong>Examples:</strong><br>
        <code>/test/qr-code?data=Hello+World</code><br>
        <code>/test/qr-code?data=https://example.com&error=H</code><br>
        <code>/test/qr-code?data=Test&format=datauri&version=2</code></p>
    </div>
    
    {$examples}
    
    <div style=\"text-align: center; margin-top: 3rem; color: #666; font-size: 14px;\">
        <p>✅ QR Code Framework Module - Fully Functional</p>
        <p>Generated by Custom PHP Framework QR Code Generator</p>
    </div>
</body>
</html>";
    }
}