import open from "open";

import glide, { Options } from "../lib";
import { login } from "../oauth";
import { display, json, isDevEnv } from "../utilities";

export interface Flags {
  readonly environment: string;
  readonly port: number;
}

export default async function serve(path: string = "glide.json", flags: Flags): Promise<void> {
  process.env.NODE_ENV = flags.environment;

  const options = await configure(path);
  const listener = glide(options).listen(flags.port, () => {
    const address = display.address(listener);

    console.log(`server listening on ${address}`);

    if (isDevEnv()) {
      open(address).then(browser => browser.unref());
    }
  });

  process.once("SIGTERM", () => {
    listener.close();
  });

  return new Promise((resolve, reject) => {
    listener.once("close", resolve);
    listener.once("error", reject);
  });
}

async function configure(path: string): Promise<Options> {
  const options = await json.read<Options>(path);

  return {
    connection: isDevEnv() ? await login(options.instance) : null,
    ...options,
  };
}