export async function api(path, options = {}) {
  const response = await fetch(path, {
    ...options,
    headers: { "Content-Type": "application/json", ...(options.headers || {}) }
  });
  const data = await response.json().catch(() => ({}));
  if (!response.ok) throw new Error(data.error || `${response.status} ${response.statusText}`);
  return data;
}

export function formatTime(value) {
  if (!value) return "—";
  const timestamp = typeof value === "number" && value < 1e12 ? value * 1000 : value;
  const date = new Date(timestamp);
  return Number.isNaN(date.getTime()) ? "—" : date.toLocaleString();
}

export function clientId() {
  const key = "picobot_web_client_id";
  let id = localStorage.getItem(key);
  if (!id) {
    id = `web_${crypto.randomUUID().replaceAll("-", "").slice(0, 24)}`;
    localStorage.setItem(key, id);
  }
  return id;
}