import axios, { AxiosInstance } from "axios";
import { tokenStore } from "../../../react-auth/token";

let apiClient: AxiosInstance | null = null;

export function initApi(baseUrl: string, getToken?: () => string | null): AxiosInstance {
  if (apiClient && apiClient.defaults.baseURL === baseUrl) {
    return apiClient;
  }

  apiClient = axios.create({
    baseURL: baseUrl,
    headers: { "Content-Type": "application/json" },
  });

  apiClient.interceptors.request.use((config) => {
    const token = getToken?.();
    if (token) {
      config.headers.Authorization = `Bearer ${token}`;
    }
    return config;
  });

  apiClient.interceptors.response.use(
    (res) => res,
    (error) => {
      if (error.response?.status === 401 && getToken) {
        const currentToken = getToken();
        if (currentToken) {
          tokenStore.clear();
        }
      }
      return Promise.reject(error);
    }
  );

  return apiClient;
}

export function getApi(): AxiosInstance {
  if (!apiClient) {
    throw new Error("API client not initialized. Make sure AppProvider is mounted.");
  }
  return apiClient;
}