// `archilyzer mcp [args…]` — start the MCP server, exactly as
// `pnpm --filter yt-dlp-transcript-mcp exec tsx src/index.ts [args…]` does:
// mcp's own tsx, cwd mcp/, the environment passed through untouched (the
// server reads TRANSCRIPT_SITE_URL / TRANSCRIPT_HUB_URL / TRANSCRIPT_LOCAL_DIR,
// ARCHILYZER_EDITOR_URL and WORKER_TOKEN from it), stdio inherited.
//
// A CHILD, never an import: the mcp package depends on common, so common
// importing mcp would make the dependency a cycle. And NOTHING may be printed
// to stdout on the way in — stdout is the JSON-RPC channel.

import { existsSync } from "node:fs";
import path from "node:path";
import { REPO_ROOT, runChild, tsxFor } from "./_spawnBin";

export async function main(argv: string[], root = REPO_ROOT): Promise<number> {
  const dir = path.join(root, "mcp");
  const entry = path.join(dir, "src", "index.ts");
  if (!existsSync(entry)) {
    console.error(`mcp: no MCP server at ${entry}`);
    return 1;
  }
  return runChild({ command: tsxFor(dir), args: ["src/index.ts", ...argv], cwd: dir });
}