import { Hono } from "hono";
import { serve } from "@hono/node-server";
import { ProcessManager } from "./manager.js";
import { createApp } from "./routes.js";

export async function startManager(port: number): Promise<void> {
  const manager = new ProcessManager();
  const app = createApp(manager);

  // Health check
  app.get("/health", (c) => c.json({ status: "ok" }));

  let shuttingDown = false;
  const shutdown = async () => {
    if (shuttingDown) return;
    shuttingDown = true;
    console.log("Shutting down...");
    await manager.shutdownAll();
    process.exit(0);
  };
  process.on("SIGTERM", shutdown);
  process.on("SIGINT", shutdown);

  const server = serve({ fetch: app.fetch, port });
  server.on("error", (err: NodeJS.ErrnoException) => {
    if (err.code === "EADDRINUSE") {
      console.error(`\n  Error: port ${port} is already in use. Use --port to specify a different port.\n`);
    } else {
      console.error(`\n  Error: ${err.message}\n`);
    }
    process.exit(1);
  });

  console.log();
  console.log(`  🖥️  ACP Manager`);
  console.log();
  console.log(`    URL:   http://localhost:${port}`);
  console.log();
  console.log(`  Press Ctrl+C to stop`);
  console.log();

  // Keep running
  await new Promise(() => {});
}