<?php
header('Content-Type: application/json');

// panel.txt will be created/appended in the same folder as this script.
$panelFile = __DIR__ . '/panel.txt';

// Read the JSON body sent by the form's fetch() call.
$raw = file_get_contents('php://input');
$data = json_decode($raw, true);

$fullname = isset($data['fullname']) ? trim($data['fullname']) : '';
$age      = isset($data['age']) ? trim($data['age']) : '';
$color    = isset($data['color']) ? trim($data['color']) : '';

if ($fullname === '' || $age === '' || $color === '') {
    http_response_code(400);
    echo json_encode(['ok' => false, 'error' => 'Missing field(s).']);
    exit;
}

$timestamp = date('Y-m-d H:i:s');
$entry = "[$timestamp]\n" .
         "Name & Surname: $fullname\n" .
         "Age: $age\n" .
         "Favorite Color: $color\n" .
         str_repeat('-', 30) . "\n";

// Append to panel.txt on the SERVER's filesystem. This file is never
// sent back to the visitor's browser or offered as a download.
$result = @file_put_contents($panelFile, $entry, FILE_APPEND | LOCK_EX);

if ($result === false) {
    http_response_code(500);
    echo json_encode(['ok' => false, 'error' => 'Could not write to panel.txt. Check folder permissions.']);
    exit;
}

echo json_encode(['ok' => true]);