import axios, { InternalAxiosRequestConfig } from 'axios';
import { getApiBaseUrl } from '../config';
import { triggerSessionExpired, isUserSyncEndpoint, isTenantEndpoint } from './sessionExpiration';
import { isUserSyncedInBrowser, isActivationPending, syncUserAccount } from './userSyncService';

export const apiClient = axios.create({
  baseURL: getApiBaseUrl(),
  headers: {
    'Content-Type': 'application/json; version=1',
    Accept: 'application/json; version=1',
  },
  timeout: 20000,
});

apiClient.interceptors.request.use(
  async (config: InternalAxiosRequestConfig) => {
    config.baseURL = getApiBaseUrl();
    const token = typeof window !== 'undefined' ? localStorage.getItem('pfm_access_token') : null;
    if (token && config.headers) {
      config.headers.Authorization = `Bearer ${token}`;
    }

    const isLifecycleRequest = isUserSyncEndpoint(config.url) || isTenantEndpoint(config.url);
    if (token && !isLifecycleRequest) {
      if (isActivationPending()) {
        return Promise.reject(new Error('User account is pending administrator activation'));
      }
      const storedSub = typeof window !== 'undefined' ? (localStorage.getItem('pfm_user_sub') || '') : '';
      if (!isUserSyncedInBrowser(storedSub, token)) {
        const syncRes = await syncUserAccount(storedSub, token);
        if (!syncRes.success) {
          return Promise.reject(new Error(syncRes.errorMessage || 'User account sync pending activation'));
        }
      }
    }
    return config;
  },
  (error) => Promise.reject(error)
);

apiClient.interceptors.response.use(
  (response) => response,
  (error) => {
    if (error?.response?.status === 401) {
      const requestUrl = error.config?.url;
      const isLifecycleEndpoint = isUserSyncEndpoint(requestUrl) || isTenantEndpoint(requestUrl);
      if (!isLifecycleEndpoint) {
        const detailMsg = error?.response?.data?.detail || error?.response?.data?.message || 'Session expired (HTTP 401).';
        triggerSessionExpired(detailMsg, requestUrl);
      }
    }
    return Promise.reject(error);
  }
);