<?php
// Server Requirements Check for M-AUTO
echo "<h1>M-AUTO Server Requirements Check</h1>";
echo "<style>
    .check-item { margin: 10px 0; padding: 10px; border-radius: 5px; }
    .success { background-color: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
    .warning { background-color: #fff3cd; color: #856404; border: 1px solid #ffeaa7; }
    .error { background-color: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }
    .info { background-color: #d1ecf1; color: #0c5460; border: 1px solid #bee5eb; }
</style>";

// PHP Version Check
echo "<h2>PHP Configuration</h2>";
$php_version = phpversion();
$min_php_version = '7.4';
if (version_compare($php_version, $min_php_version, '>=')) {
    echo "<div class='check-item success'>✓ PHP Version: $php_version (Required: $min_php_version+)</div>";
} else {
    echo "<div class='check-item error'>✗ PHP Version: $php_version (Required: $min_php_version+)</div>";
}

// Required Extensions
$required_extensions = [
    'mysqli' => 'MySQL Database Support',
    'mbstring' => 'Multibyte String Support (for Arabic)',
    'gd' => 'Image Processing',
    'curl' => 'HTTP Requests',
    'json' => 'JSON Support',
    'session' => 'Session Support',
    'fileinfo' => 'File Information',
    'zip' => 'ZIP Archive Support'
];

echo "<h3>Required PHP Extensions</h3>";
foreach ($required_extensions as $ext => $desc) {
    if (extension_loaded($ext)) {
        echo "<div class='check-item success'>✓ $desc ($ext)</div>";
    } else {
        echo "<div class='check-item error'>✗ $desc ($ext) - MISSING</div>";
    }
}

// PHP Settings
echo "<h3>PHP Settings</h3>";
$settings = [
    'upload_max_filesize' => ['current' => ini_get('upload_max_filesize'), 'recommended' => '10M'],
    'post_max_size' => ['current' => ini_get('post_max_size'), 'recommended' => '10M'],
    'max_execution_time' => ['current' => ini_get('max_execution_time'), 'recommended' => '300'],
    'memory_limit' => ['current' => ini_get('memory_limit'), 'recommended' => '256M'],
    'max_input_vars' => ['current' => ini_get('max_input_vars'), 'recommended' => '3000']
];

foreach ($settings as $setting => $values) {
    $class = 'info';
    $status = 'ℹ';
    echo "<div class='check-item $class'>$status $setting: {$values['current']} (Recommended: {$values['recommended']})</div>";
}

// Directory Permissions
echo "<h2>Directory Permissions</h2>";
$directories = [
    'uploads' => 'File Uploads',
    'assets/images' => 'Image Assets',
    'includes' => 'Include Files'
];

foreach ($directories as $dir => $desc) {
    if (is_dir($dir)) {
        if (is_writable($dir)) {
            echo "<div class='check-item success'>✓ $desc ($dir) - Writable</div>";
        } else {
            echo "<div class='check-item warning'>⚠ $desc ($dir) - Not Writable</div>";
        }
    } else {
        echo "<div class='check-item warning'>⚠ $desc ($dir) - Directory doesn't exist</div>";
    }
}

// Database Connection Test
echo "<h2>Database Connection</h2>";
try {
    include 'includes/db.php';
    if ($conn && !$conn->connect_error) {
        echo "<div class='check-item success'>✓ Database Connection - OK</div>";
        
        // Check database charset
        $charset_result = $conn->query("SELECT @@character_set_database as charset");
        if ($charset_result) {
            $charset = $charset_result->fetch_assoc()['charset'];
            if ($charset === 'utf8mb4') {
                echo "<div class='check-item success'>✓ Database Charset: $charset (Arabic Support)</div>";
            } else {
                echo "<div class='check-item warning'>⚠ Database Charset: $charset (Recommended: utf8mb4)</div>";
            }
        }
        
        // Check tables
        $tables_result = $conn->query("SHOW TABLES");
        $table_count = $tables_result->num_rows;
        echo "<div class='check-item info'>ℹ Database Tables: $table_count found</div>";
        
    } else {
        echo "<div class='check-item error'>✗ Database Connection Failed</div>";
    }
} catch (Exception $e) {
    echo "<div class='check-item error'>✗ Database Connection Error: " . $e->getMessage() . "</div>";
}

// Server Information
echo "<h2>Server Information</h2>";
echo "<div class='check-item info'>ℹ Server Software: " . $_SERVER['SERVER_SOFTWARE'] . "</div>";
echo "<div class='check-item info'>ℹ Document Root: " . $_SERVER['DOCUMENT_ROOT'] . "</div>";
echo "<div class='check-item info'>ℹ Current Directory: " . __DIR__ . "</div>";
echo "<div class='check-item info'>ℹ PHP SAPI: " . php_sapi_name() . "</div>";

echo "<h2>Recommendations for Production</h2>";
echo "<div class='check-item warning'>⚠ Remove this file (server_check.php) after deployment</div>";
echo "<div class='check-item warning'>⚠ Update database credentials in includes/config.php</div>";
echo "<div class='check-item warning'>⚠ Enable HTTPS and update .htaccess</div>";
echo "<div class='check-item warning'>⚠ Set up regular database backups</div>";
echo "<div class='check-item warning'>⚠ Configure error logging</div>";

echo "<p><strong>Generated on:</strong> " . date('Y-m-d H:i:s') . "</p>";
?>