#!/usr/bin/env node

import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import {
  CallToolRequestSchema,
  ListToolsRequestSchema,
} from "@modelcontextprotocol/sdk/types.js";

const server = new Server(
  {
    name: "hello-world-node",
    version: "1.0.0",
  },
  {
    capabilities: {
      tools: {},
    },
  },
);

// Handle tool listing
server.setRequestHandler(ListToolsRequestSchema, async (request) => {
  return {
    tools: [
      {
        name: "get_current_time",
        description: "Get the current computer time",
        inputSchema: {
          type: "object",
          properties: {},
        },
      },
    ],
  };
});

// Handle tool execution
server.setRequestHandler(CallToolRequestSchema, async (request) => {
  if (request.params.name === "get_current_time") {
    const now = new Date();
    const timeString = now.toLocaleString("en-US", {
      weekday: "long",
      year: "numeric",
      month: "long",
      day: "numeric",
      hour: "2-digit",
      minute: "2-digit",
      second: "2-digit",
      timeZoneName: "short",
    });

    return {
      content: [
        {
          type: "text",
          text: `The current time is: ${timeString}`,
        },
      ],
    };
  }

  throw new Error(`Unknown tool: ${request.params.name}`);
});

// Start the server
async function main() {
  const transport = new StdioServerTransport();
  await server.connect(transport);
  console.error("Hello World MCP server running...");
}

main().catch((error) => {
  console.error("Fatal error in main():", error);
  process.exit(1);
});