server.ts

import { McpServer } from '@modelcontextprotocol/sdk/server/mcp.js';
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';

const MCP_ENV_DEFAULTS: Record<string, string> = {
  NEXT_PUBLIC_STELLAR_NETWORK: 'mainnet',
  NEXT_PUBLIC_HORIZON_URL: 'https://horizon.stellar.org',
  NEXT_PUBLIC_USDC_ISSUER: 'GA5ZSEJYB37JRC5AVCIA5MOP4RHTM335X2KGX3IHOJAPP5RE34K4KZVN',
  NEXT_PUBLIC_APP_NAME: 'Stellar Intel',
};

for (const [key, value] of Object.entries(MCP_ENV_DEFAULTS)) {
  if (!process.env[key] || process.env[key]?.trim() === '') {
    process.env[key] = value;
  }
}

export async function createServer(): Promise<McpServer> {
  // Dynamic imports so env defaults above are applied before lib/config loads.
  const { registerQuoteTool } = await import('./tools/quote');
  const { registerPrepareTool } = await import('./tools/prepare');

  const server = new McpServer({
    name: 'stellar-intel',
    version: '1.2.0',
  });
  registerQuoteTool(server);
  registerPrepareTool(server);
  return server;
}

async function main(): Promise<void> {
  const server = await createServer();
  const transport = new StdioServerTransport();
  await server.connect(transport);
  // The process now stays alive serving stdio requests until the client closes.
}

// Only auto-start when invoked directly (not when imported by tests).
const invokedDirectly =
  process.argv[1] !== undefined && /scripts[\\/]mcp[\\/]server\.(ts|js|mjs)$/.test(process.argv[1]);

if (invokedDirectly) {
  main().catch((err) => {
    process.stderr.write(`MCP server failed to start: ${String(err)}\n`);
    process.exit(1);
  });
}