/**
 * Home Assistant MCP (Master Control Program)
 * Main application entry point
 * 
 * This file initializes the Express server and sets up all necessary
 * middleware and routes for the application.
 * 
 * @module index
 */

import './polyfills.js';
import express from 'express';
import { APP_CONFIG } from './config/app.config.js';
import { apiRoutes } from './routes/index.js';
import { securityHeaders, rateLimiter, validateRequest, sanitizeInput, errorHandler } from './security/index.js';
import { requestLogger, errorLogger } from './middleware/logging.middleware.js';
import { get_hass } from './hass/index.js';
import { LiteMCP } from 'litemcp';
import { logger } from './utils/logger.js';

logger.info('Starting Home Assistant MCP...');
logger.info('Initializing Home Assistant connection...');

/**
 * Initialize Express application with security middleware
 * and route handlers
 */
const app = express();

// Apply logging middleware first to catch all requests
app.use(requestLogger);

// Apply security middleware
app.use(securityHeaders);
app.use(rateLimiter);
app.use(express.json());
app.use(validateRequest);
app.use(sanitizeInput);

/**
 * Initialize LiteMCP instance
 * This provides the core MCP functionality
 */
const server = new LiteMCP('home-assistant', APP_CONFIG.VERSION);

/**
 * Mount API routes under /api
 * All API endpoints are prefixed with /api
 */
app.use('/api', apiRoutes);

/**
 * Apply error handling middleware
 * This should be the last middleware in the chain
 */
app.use(errorLogger);
app.use(errorHandler);

/**
 * Start the server and listen for incoming connections
 * The port is configured in the environment variables
 */
app.listen(APP_CONFIG.PORT, () => {
  logger.info(`Server is running on port ${APP_CONFIG.PORT}`);
});