src/lib/api.ts

import axios from "axios";
import { getToken, removeToken } from "./auth";

// Pointing to /api so Next.js rewrites proxy it to the FastAPI backend on port 8000
export const API_BASE_URL = "/api";

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

api.interceptors.request.use(
  (config) => {
    const token = getToken();
    if (token && config.headers) {
      config.headers.Authorization = `Bearer ${token}`;
    }
    return config;
  },
  (error) => Promise.reject(error)
);

api.interceptors.response.use(
  (response) => response,
  (error) => {
    if (error.response?.status === 401) {
      removeToken();
      if (typeof window !== "undefined" && window.location.pathname !== "/") {
        window.location.href = "/";
      }
    }
    return Promise.reject(error);
  }
);

export default api;