<?php
$folder = isset($_GET['folder']) ? rtrim($_GET['folder'], '/') . '/' : '';

if ($folder && is_dir($folder)) {
    $files = scandir($folder);
    $converted = 0;
    /*
    foreach ($files as $file) {
        $ext = strtolower(pathinfo($file, PATHINFO_EXTENSION));
        if (is_file($folder . $file) && in_array($ext, ['jpg', 'jpeg', 'png'])) {
            $source = $folder . $file;
            $destination = $folder . pathinfo($file, PATHINFO_FILENAME) . '.webp';

            if (convertToWebp($source, $destination)) {
                //unlink($source); // ✅ ลบไฟล์ต้นฉบับ
                $converted++;
            }
        }
    }
    */
    foreach ($files as $file) {
        $filepath = $folder . $file;
        if (is_file($filepath)) {
            $ext = strtolower(pathinfo($file, PATHINFO_EXTENSION));
            if (in_array($ext, ['jpg', 'jpeg', 'png'])) {
                if (convertToWebp($filepath, $folder . pathinfo($file, PATHINFO_FILENAME) . '.webp')) {
                    unlink($filepath);
                    $converted++;
                }
            }
        }
    }
    echo "✅ แปลงและลบไฟล์ต้นฉบับทั้งหมดสำเร็จ $converted ไฟล์ → <a href='index.php?folder=" . urlencode($folder) . "'>กลับ</a>";
} else {
    echo "❌ ไม่พบโฟลเดอร์";
}

function convertToWebp($source, $destination, $quality = 80) {
    $info = getimagesize($source);
    $mime = $info['mime'];

    switch ($mime) {
        case 'image/jpeg':
            $image = imagecreatefromjpeg($source);
            break;
        case 'image/png':
            $image = @imagecreatefrompng($source);
            imagepalettetotruecolor($image);
            imagealphablending($image, true);
            imagesavealpha($image, true);
            break;
        default:
            return false;
    }

    $result = imagewebp($image, $destination, $quality);
    imagedestroy($image);
    return $result;
}
?>