frontend/src/services/api.js

import axios from 'axios';
import { auth } from './firebase';
import { API_BASE_URL } from '../utils/constants';

// Create axios instance with base URL
const api = axios.create({
  baseURL: API_BASE_URL,
  headers: {
    'Content-Type': 'application/json',
  },
});

// Request interceptor — attach Firebase ID token
api.interceptors.request.use(
  async (config) => {
    try {
      const user = auth.currentUser;
      if (user) {
        const token = await user.getIdToken();
        config.headers.Authorization = `Bearer ${token}`;
      }
    } catch (error) {
      console.error('Error getting auth token:', error);
    }
    return config;
  },
  (error) => Promise.reject(error)
);

// Response interceptor — handle errors
api.interceptors.response.use(
  (response) => response.data,
  (error) => {
    const message = error.response?.data?.error || error.message || 'Something went wrong';
    console.error('API Error:', message);
    return Promise.reject({ message, status: error.response?.status });
  }
);

export default api;