apiService.js

import axios from 'axios';

/**
 * A centralized Axios instance.
 */
const api = axios.create();

/**
 * Configures the default settings for the centralized API instance.
 * This should be called once when the app loads and when settings change.
 * @param {string} baseUrl The base URL for the API.
 * @param {string} apiKey The API key for the 'x-api-key' header.
 */
export const configureApi = (baseUrl, apiKey) => {
  api.defaults.baseURL = baseUrl;
  api.defaults.headers.common['x-api-key'] = apiKey;
};

/**
 * Fetches the current sensor values from the API.
 */
export const getSensorValues = async () => {
  const response = await api.get('/sensor-values');
  return response.data;
};

/**
 * Sends an update command for a specific relay.
 * @param {string} relayName - The name of the relay to update (e.g., 'RELAY1').
 * @param {number} value - The value to set for the relay (1 or 2).
 */
export const updateRelay = async (relayName, value) => {
  const response = await api.post('/update-relay', { relayName, value });
  return response.data;
};

// We can also export the instance itself if needed elsewhere
export default api;