// mcp_calculator_server.js - Sample MCP Calculator Server implementation in JavaScript
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { z } from "zod"; 

// Create an MCP server
const server = new McpServer({
  name: "Calculator MCP Server",
  version: "1.0.0"
});

// Define calculator tools for each operation
server.tool(
  "add",
  {
    a: z.number(),
    b: z.number()
  },
  async ({ a, b }) => ({
    content: [{ type: "text", text: String(a + b) }]
  })
);

server.tool(
  "subtract",
  {
    a: z.number(),
    b: z.number()
  },
  async ({ a, b }) => ({
    content: [{ type: "text", text: String(a - b) }]
  })
);

server.tool(
  "multiply",
  {
    a: z.number(),
    b: z.number()
  },
  async ({ a, b }) => ({
    content: [{ type: "text", text: String(a * b) }]
  })
);

server.tool(
  "divide",
  {
    a: z.number(),
    b: z.number()
  },
  async ({ a, b }) => {
    if (b === 0) {
      return {
        content: [{ type: "text", text: "Error: Cannot divide by zero" }],
        isError: true
      };
    }
    return {
      content: [{ type: "text", text: String(a / b) }]
    };
  }
);

// Connect the server using stdio transport
const transport = new StdioServerTransport();
server.connect(transport).catch(console.error);

console.log("Calculator MCP Server started");