proposal-system/mobile/src/lib/api/client.ts

import axios from 'axios';
import Config from '../../config';
import { tokenStorage } from '../storage';

const apiClient = axios.create({
  baseURL: Config.API_URL,
  headers: {
    'Content-Type': 'application/json',
    Accept: 'application/json',
  },
});

apiClient.interceptors.request.use(
  async (config) => {
    const tokens = await tokenStorage.get();
    if (tokens?.accessToken) {
      config.headers.Authorization = `Bearer ${tokens.accessToken}`;
    }
    return config;
  },
  (error) => Promise.reject(error),
);

apiClient.interceptors.response.use(
  (response) => response,
  (error) => {
    if (error.response) {
      const { status, data } = error.response;

      if (status === 401) {
        tokenStorage.clear();
        return Promise.reject(
          new Error('Session expired. Please log in again.'),
        );
      }

      if (status === 403) {
        return Promise.reject(
          new Error('You do not have permission to perform this action.'),
        );
      }

      if (status === 404) {
        return Promise.reject(
          new Error('The requested resource was not found.'),
        );
      }

      const message =
        data?.detail || data?.title || data?.message || 'An error occurred';
      return Promise.reject(new Error(message));
    }

    if (error.request) {
      return Promise.reject(
        new Error('No response from server. Please check your connection.'),
      );
    }

    return Promise.reject(error);
  },
);

export default apiClient;