#!/usr/bin/env node
/**
 * `hfmarketdata-mcp` — stdio entry point.
 *
 *   HFMD_API_KEY=hfmd_live_… hfmarketdata-mcp
 *   hfmarketdata-mcp --version | --help | --selftest
 *
 * All logs go to stderr (stdout is the MCP channel).
 */
import { StdioServerTransport } from '@modelcontextprotocol/sdk/server/stdio.js';
import { HfmdClient } from './client.js';
import { createServer, SERVER_VERSION } from './server.js';
import { TOOL_NAMES } from './tools.js';

const argv = process.argv.slice(2);

if (argv.includes('--version') || argv.includes('-v')) {
  console.log(SERVER_VERSION);
  process.exit(0);
}

if (argv.includes('--help') || argv.includes('-h')) {
  console.log(`hfmarketdata-mcp ${SERVER_VERSION} — MCP server for https://www.hfmarketdata.io

Usage: hfmarketdata-mcp            start the stdio MCP server (used by Claude Code, Cursor, Codex…)
       hfmarketdata-mcp --selftest call /v1/status and print the rate-limit headroom
Env:   HFMD_API_KEY   optional bearer key (free account: 120 req/min; keyless: 30 req/h per IP)
       HFMD_BASE_URL  API base URL (default https://www.hfmarketdata.io)
Tools: ${TOOL_NAMES.join(', ')}
Resources: hfmarketdata://status, hfmarketdata://limits
Prompts: term-structure-analysis, compare-contracts, fundamentals-snapshot`);
  process.exit(0);
}

if (argv.includes('--selftest')) {
  const client = new HfmdClient();
  client
    .get<Record<string, unknown>>('/v1/status')
    .then((r) => {
      const datasets = (r.body?.datasets ?? {}) as Record<string, unknown>;
      console.log(`OK ${client.baseUrl} (${r.ms} ms, ${client.keyless ? 'keyless' : 'api key set'}) — datasets: ${Object.keys(datasets).join(', ') || 'n/a'}`);
      console.log(JSON.stringify(r.rate));
      process.exit(0);
    })
    .catch((e) => {
      console.error(String(e?.describe?.() ?? e));
      process.exit(1);
    });
} else {
  const { server, client } = createServer();
  const transport = new StdioServerTransport();
  server
    .connect(transport)
    .then(() => console.error(`hfmarketdata-mcp ${SERVER_VERSION} ready on stdio — ${client.baseUrl} (${client.keyless ? 'keyless, 30 req/h' : 'API key set'})`))
    .catch((e) => {
      console.error('hfmarketdata-mcp failed to start:', e);
      process.exit(1);
    });
  const shutdown = () => { server.close().finally(() => process.exit(0)); };
  process.on('SIGINT', shutdown);
  process.on('SIGTERM', shutdown);
}