<?php
// Include header
include 'includes/header.php';

// Check if the user is an admin
if (!isset($_SESSION['user_id']) || ($_SESSION['role'] !== 'admin' && $_SESSION['role'] !== 'director')) {
    echo '<div class="alert alert-danger">Access denied. You must be an admin to access this page.</div>';
    include 'includes/footer.php';
    exit;
}

// Define paths
$target_dir = __DIR__ . '/../assets/img/courses/';
$default_image = $target_dir . 'default.jpg';

// Create directory if it doesn't exist
if (!file_exists($target_dir)) {
    if (!mkdir($target_dir, 0777, true)) {
        echo '<div class="alert alert-danger">Failed to create directory for course images.</div>';
        include 'includes/footer.php';
        exit;
    }
}

// Create a default course image
$width = 1200;
$height = 600;
$image = imagecreatetruecolor($width, $height);

// Define colors
$bg_color = imagecolorallocate($image, 79, 70, 229); // Primary color #4F46E5
$text_color = imagecolorallocate($image, 255, 255, 255); // White text
$accent_color = imagecolorallocate($image, 99, 102, 241); // Lighter accent color

// Fill background with gradient-like effect
imagefill($image, 0, 0, $bg_color);

// Add some design elements (circles)
for ($i = 0; $i < 8; $i++) {
    $circle_x = mt_rand(0, $width);
    $circle_y = mt_rand(0, $height);
    $circle_size = mt_rand(50, 200);
    imagefilledellipse($image, $circle_x, $circle_y, $circle_size, $circle_size, $accent_color);
}

// Add text
$text = "Course Image";
$font_size = 5;
$font_path = __DIR__ . '/fonts/arial.ttf';

// Use TrueType font if available
if (file_exists($font_path)) {
    // Calculate position for centered text
    $bbox = imagettfbbox(40, 0, $font_path, $text);
    $text_width = $bbox[2] - $bbox[0];
    $text_x = ($width - $text_width) / 2;
    $text_y = ($height / 2) + 20;
    
    imagettftext($image, 40, 0, $text_x, $text_y, $text_color, $font_path, $text);
} else {
    // Fallback to built-in font
    $text_width = imagefontwidth($font_size) * strlen($text);
    $text_x = ($width - $text_width) / 2;
    $text_y = ($height / 2);
    
    imagestring($image, $font_size, $text_x, $text_y, $text, $text_color);
}

// Save image
imagejpeg($image, $default_image, 90);
imagedestroy($image);

// Output success message
?>

<div class="container mt-5">
    <div class="row">
        <div class="col-12">
            <div class="card">
                <div class="card-header">
                    <h4>Default Course Image Created</h4>
                </div>
                <div class="card-body">
                    <div class="alert alert-success">
                        <p>The default course image has been created successfully!</p>
                    </div>
                    
                    <div class="text-center my-4">
                        <img src="../assets/img/courses/default.jpg" alt="Default Course Image" class="img-fluid rounded shadow-sm" style="max-width: 500px;">
                    </div>
                    
                    <div class="mt-4">
                        <p>This image will be used as a fallback when no specific course image is available.</p>
                        <p>Path: <code>assets/img/courses/default.jpg</code></p>
                    </div>
                    
                    <div class="text-center mt-4">
                        <a href="index.php" class="btn btn-primary">Return to Dashboard</a>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<?php
include 'includes/footer.php';
?>