export const API_BASE = process.env.NEXT_PUBLIC_API_BASE_URL ?? "http://127.0.0.1:8000/api";

async function request<T>(path: string, init?: RequestInit): Promise<T> {
  const response = await fetch(`${API_BASE}${path}`, {
    ...init,
    cache: "no-store",
    headers: {
      "Content-Type": "application/json",
      ...(init?.headers ?? {})
    }
  });
  if (!response.ok) {
    let message = `${response.status} ${response.statusText}`;
    try {
      const body = await response.json();
      message = body.detail ?? message;
    } catch {
      // keep response status as message
    }
    throw new Error(message);
  }
  return response.json() as Promise<T>;
}

export const api = {
  get: <T>(path: string) => request<T>(path),
  post: <T>(path: string, body: unknown = {}) =>
    request<T>(path, { method: "POST", body: JSON.stringify(body) }),
  patch: <T>(path: string, body: unknown) =>
    request<T>(path, { method: "PATCH", body: JSON.stringify(body) })
};

export function formatDateTime(value: string | null | undefined) {
  if (!value) return "-";
  return new Intl.DateTimeFormat("zh-CN", {
    dateStyle: "short",
    timeStyle: "short"
  }).format(new Date(value));
}