import { discover } from '@agentcommunity/aid';
// This is a fictional MCP client library for demonstration.
// Use your actual MCP implementation.
import { createMcpClient, McpCapabilities } from 'your-mcp-client-library';

// Based on the MCP specification for the initialize handshake
interface ClientInfo {
  name: string;
  version?: string;
}

async function connectToMcpServer(domain: string) {
  try {
    // 1. Discover the agent's endpoint URI using AID
    console.log(`Discovering agent for ${domain}...`);
    const { record } = await discover(domain);

    // 2. Validate that it's an MCP agent
    if (record.proto !== 'mcp') {
      throw new Error(`Expected 'mcp' protocol, but found '${record.proto}'`);
    }

    console.log(`Found MCP agent at: ${record.uri}`);
    console.log(`Description: ${record.desc}`);

    // 3. Use the discovered URI to initiate the MCP lifecycle
    const mcpClient = createMcpClient({ endpoint: record.uri });

    const clientInfo: ClientInfo = { name: 'MyAwesomeClient', version: '1.0.0' };
    const capabilities: McpCapabilities = { sampling: {}, roots: { listChanged: true } };

    console.log('Sending MCP initialize request...');
    const { serverInfo } = await mcpClient.initialize({ clientInfo, capabilities });

    console.log(
      `Successfully connected to MCP server: ${serverInfo.name} (v${serverInfo.version})`,
    );
    // The MCP session is now active. You can proceed with other MCP operations.
    // e.g., const tools = await mcpClient.tools.list();
  } catch (error) {
    const msg = error instanceof Error ? error.message : String(error);
    console.error(`Failed to connect to ${domain}:`, msg);
  }
}

// Use a domain that has published an AID record for its MCP server
connectToMcpServer('supabase.agentcommunity.org');