frontend/src/lib/api.ts

import axios from "axios";
import { useAuthStore } from "@/store/authStore";

const API_BASE_URL = process.env.NEXT_PUBLIC_API_URL || "http://localhost:8000/api/v1";

const api = axios.create({
  baseURL: API_BASE_URL,
  headers: { "Content-Type": "application/json" },
  timeout: 15000,
});

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

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

export function getApiErrorMessage(err: unknown, fallback = "Something went wrong"): string {
  return (err as { response?: { data?: { detail?: string } } })?.response?.data?.detail || fallback;
}

export default api;