#!/usr/bin/env node

/**
 * Webflow MCP Server - Entry Point
 * Provides tools for managing Webflow sites, CMS collections, pages, forms, assets, and webhooks
 */

import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import { WebflowMCPServer } from './server.js';
import { WebflowClient } from './client/webflow-client.js';

// Environment validation
const WEBFLOW_API_TOKEN = process.env.WEBFLOW_API_TOKEN;

if (!WEBFLOW_API_TOKEN) {
  console.error('ERROR: WEBFLOW_API_TOKEN environment variable is required');
  console.error('');
  console.error('Get your API token from:');
  console.error('1. Log in to https://webflow.com');
  console.error('2. Go to Workspace Settings > Apps & Integrations');
  console.error('3. Generate a new API token with required scopes');
  console.error('');
  console.error('Then set it in your environment:');
  console.error('  export WEBFLOW_API_TOKEN="your_token_here"');
  console.error('');
  process.exit(1);
}

// Create API client
const client = new WebflowClient(WEBFLOW_API_TOKEN);

// Create MCP server
const server = new WebflowMCPServer(client);

// Create transport
const transport = new StdioServerTransport();

// Graceful shutdown handlers
let isShuttingDown = false;

const shutdown = async (signal: string) => {
  if (isShuttingDown) return;
  isShuttingDown = true;

  console.error(`\nReceived ${signal}, shutting down gracefully...`);
  
  try {
    await transport.close();
    console.error('Transport closed successfully');
  } catch (error) {
    console.error('Error during shutdown:', error);
  }
  
  process.exit(0);
};

process.on('SIGINT', () => shutdown('SIGINT'));
process.on('SIGTERM', () => shutdown('SIGTERM'));

// Global error handlers
process.on('uncaughtException', (error) => {
  console.error('Uncaught exception:', error);
  shutdown('uncaughtException');
});

process.on('unhandledRejection', (reason, promise) => {
  console.error('Unhandled rejection at:', promise, 'reason:', reason);
});

// Start server
async function main() {
  try {
    await server.connect(transport);
    console.error('Webflow MCP server running on stdio');
    console.error(`Environment: ${process.env.NODE_ENV || 'production'}`);
  } catch (error) {
    console.error('Failed to start server:', error);
    process.exit(1);
  }
}

main();