<?php
require_once __DIR__ . '/../helpers.php';
runAuth();

/**
 * File upload test/debug utility
 * Accepts multipart form with file fields (file0, file1, etc.)
 */

$response = ['OK' => false];

try {
    // Step 1: Check form fields
    $response['step'] = 'checking form fields';
    $response['formFields'] = array_keys($_FILES);

    // Step 2: Find file fields
    $response['step'] = 'finding file fields';
    $uploadedFiles = [];
    foreach ($_FILES as $fieldName => $fileInfo) {
        if (preg_match('/^file[0-9]+$/', $fieldName)) {
            $uploadedFiles[] = $fieldName;
        }
    }
    $response['uploadedFiles'] = $uploadedFiles;

    if (empty($uploadedFiles)) {
        throw new Exception('No files found');
    }

    // Step 3: Create temp directory
    $response['step'] = 'creating temp dir';
    $uploadDir = sys_get_temp_dir() . '/test_uploads';
    if (!is_dir($uploadDir)) mkdir($uploadDir, 0755, true);
    $response['uploadDir'] = $uploadDir;

    // Step 4: Upload first file
    $response['step'] = 'uploading file';
    $fieldName = $uploadedFiles[0];
    $file = $_FILES[$fieldName];

    $allowedTypes = ['image/jpeg', 'image/png', 'image/gif', 'image/webp', 'application/pdf'];
    if (!in_array($file['type'], $allowedTypes)) {
        throw new Exception('File type not accepted: ' . $file['type']);
    }

    $destPath = $uploadDir . '/' . basename($file['name']);
    move_uploaded_file($file['tmp_name'], $destPath);

    $response['uploadResult'] = true;
    $response['serverFile'] = basename($file['name']);
    $response['serverFileExt'] = pathinfo($file['name'], PATHINFO_EXTENSION);

    // Step 5: Read the file
    $response['step'] = 'reading file';
    $response['filePath'] = $destPath;
    $response['fileExists'] = file_exists($destPath);

    // Step 6: Try image operations
    $fileExt = strtolower(pathinfo($file['name'], PATHINFO_EXTENSION));
    if (in_array($fileExt, ['jpg', 'jpeg', 'png', 'gif', 'webp'])) {
        $response['step'] = 'reading image';
        $imageInfo = getimagesize($destPath);
        if ($imageInfo) {
            $response['imageWidth'] = $imageInfo[0];
            $response['imageHeight'] = $imageInfo[1];
        }

        $response['step'] = 'converting to base64';
        $fileContent = file_get_contents($destPath);
        $base64Content = base64_encode($fileContent);
        $response['base64Length'] = strlen($base64Content);
    }

    // Step 7: Cleanup
    $response['step'] = 'cleanup';
    unlink($destPath);

    $response['OK'] = true;
    $response['step'] = 'complete';

} catch (Exception $e) {
    $response['MESSAGE'] = $e->getMessage();
}

jsonResponse($response);