<?php
$gif_files = glob($_SERVER['DOCUMENT_ROOT'] . '/assets/gifs/*.gif');
$gifs = array_map(fn($f) => '/assets/gifs/' . basename($f), $gif_files);
$base_url = 'https://sistav.com';

$path = trim(parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH), '/');

// /gif/random — serve a random gif
if ($path === 'gif/random') {
    if (empty($gifs)) { http_response_code(404); exit; }
    $file = $gif_files[array_rand($gif_files)];
    header('Content-Type: image/gif');
    header('Content-Length: ' . filesize($file));
    header('Cache-Control: no-store, no-cache, must-revalidate');
    readfile($file);
    exit;
}

// /gif — return JSON list
header('Content-Type: application/json');
echo json_encode([
    'count' => count($gifs),
    'gifs'  => array_map(fn($g) => $base_url . $g, $gifs)
]);