/** 后端 API 客户端（开发期指向本地 FastAPI，地址见 .env.local）。 */
const BASE = process.env.NEXT_PUBLIC_API_BASE ?? "http://127.0.0.1:8000/api";

export async function apiGet<T>(path: string): Promise<T> {
  const resp = await fetch(`${BASE}${path}`);
  if (!resp.ok) throw new Error(`GET ${path} → ${resp.status}: ${await resp.text()}`);
  return (await resp.json()) as T;
}

export async function apiPost<T>(path: string, body: unknown): Promise<T> {
  const resp = await fetch(`${BASE}${path}`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
  });
  if (!resp.ok) {
    const text = await resp.text();
    throw new Error(`POST ${path} → ${resp.status}: ${text.slice(0, 300)}`);
  }
  return (await resp.json()) as T;
}

export interface ApiError {
  status: number;
  message: string;
}