<?php
// Upload Directory
$uploadDir = 'uploads/';
$maxFileSize = 5 * 1024 * 1024; // 5MB in bytes
$validTypes = ['jpg', 'jpeg', 'png', 'gif']; // Note .SVG is dangerious
$a_crops = [
	['name'=>'half', 'width'=>0, 'height'=>0, 'crop'=>false],
	['name'=>'hd', 'width'=>1920, 'height'=>1080, 'crop'=>false],
	['name'=>'thumbnail', 'width'=>300, 'height'=>300, 'crop'=>false],
	//['name'=>'crop', 'width'=>300, 'height'=>300, 'crop'=>true],
];
// Set the quality (0-100)
$JPEG_quality = 75; // Adjust this value as needed
// Set the compression level (0-9)
$PNG_compression = 9; // Adjust this value as needed
$GIF_number_of_colors = 128; // Adjust number of Colors as needed

/**
 * nano /etc/php/8.3/apache2/php.ini
 * edit php.ini for the following:
 */ 
ini_set('upload_max_filesize', '6M'); // Adjust upload limits
ini_set('post_max_size', '6M');
ini_set('max_file_uploads', '15');
ini_set('max_execution_time', '90'); // 90 seconds = 1.5 minutes
ini_set('max_input_time', '90'); // 1.5 minutes

require_once "image_compression.php";

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    if (isset($_FILES['files'])) {
        $files = $_FILES['files'];
        $responses = [];

        // Ensure the uploads directory exists
        if (!is_dir($uploadDir)) {
            mkdir($uploadDir, 0775, true);
        }

        for ($i = 0; $i < count($files['name']); $i++) {
            $fileName = basename($files['name'][$i]);
            $fileTmpName = $files['tmp_name'][$i];
            $fileSize = $files['size'][$i];
            $fileType = strtolower(pathinfo($fileName, PATHINFO_EXTENSION));
            $uploadFile = $uploadDir . $fileName;

            // Validate file type (only images allowed)
            if (!in_array($fileType, $validTypes)) {
                $responses[] = ['status' => 'error', 'message' => "Invalid file type for {$fileName}. Only images are allowed."];
                @unlink($fileTmpName);
                continue;
            }

            // Validate file size (limit to 5MB)
            if ($fileSize > $maxFileSize) {
                $responses[] = ['status' => 'error', 'message' => "File size for $fileName exceeds the limit of 5MB."];
                @unlink($fileTmpName);
                continue;
            }

            // Move the uploaded file to the server
            if (move_uploaded_file($fileTmpName, $uploadFile)) {                
                $compressed_files = image_compression($uploadFile, $fileName, $GLOBALS['a_crops']);
                if (count($compressed_files)) {
					$responses[] = ['status' => 'success', 'message' => "$fileName"];
					foreach($compressed_files as $file) {
						 $save_to_DB = $uploadDir . $file;
						 // HANDLE $save_to_DB to save to Database
					}
				} else {					
					$responses[] = ['status' => 'error', 'message' => "Failed to Scale image$fileName."];					
				}	                
            } else {
                $responses[] = ['status' => 'error', 'message' => "Failed to upload $fileName."];
            }
        }

        echo json_encode($responses);
    } else {
        echo json_encode([['status' => 'error', 'message' => 'No files were uploaded.']]);
    }
} else {
    echo json_encode([['status' => 'error', 'message' => 'Invalid request method.']]);
}