import type { CreateMindmapPayload, Mindmap } from "../types/mindmap";

const API_BASE_URL =
  process.env.NEXT_PUBLIC_API_BASE_URL ?? "http://127.0.0.1:8000";

async function request<T>(path: string, init?: RequestInit): Promise<T> {
  const response = await fetch(`${API_BASE_URL}${path}`, {
    ...init,
    headers: {
      "Content-Type": "application/json",
      ...(init?.headers ?? {}),
    },
    cache: "no-store",
  });

  if (!response.ok) {
    const message = await response.text();
    throw new Error(message || "请求失败");
  }

  return (await response.json()) as T;
}

export async function createMindmap(
  payload: CreateMindmapPayload,
): Promise<Mindmap> {
  return request<Mindmap>("/api/mindmaps", {
    method: "POST",
    body: JSON.stringify(payload),
  });
}

export async function getMindmap(uniqueId: string): Promise<Mindmap> {
  return request<Mindmap>(`/api/mindmaps/${uniqueId}`);
}

export async function sendChatMessage(
  sessionId: string,
  content: string,
  visitorBizId: string = "default_visitor",
  signal?: AbortSignal,
): Promise<Response> {
  const response = await fetch(`${API_BASE_URL}/api/chat`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    signal,
    body: JSON.stringify({
      session_id: sessionId,
      content,
      visitor_biz_id: visitorBizId,
    }),
  });

  if (!response.ok) {
    const message = await response.text();
    throw new Error(message || "请求失败");
  }

  return response;
}