import { spawn } from "node:child_process";
import { createInterface } from "node:readline";

export async function readLine(): Promise<string> {
  if (!process.stdin.isTTY) {
    const chunks: Buffer[] = [];
    for await (const chunk of process.stdin) {
      chunks.push(Buffer.from(chunk));
    }
    return Buffer.concat(chunks).toString("utf8").trim();
  }

  const rl = createInterface({ input: process.stdin, output: process.stderr });
  return new Promise((resolve) => {
    rl.once("line", (line) => {
      rl.close();
      resolve(line.trim());
    });
  });
}

export async function openInBrowser(url: string): Promise<void> {
  const platform = process.platform;
  const cmd =
    platform === "darwin"
      ? ["open", url]
      : platform === "win32"
        ? ["cmd", "/c", "start", "", url]
        : ["xdg-open", url];

  await new Promise<void>((resolve, reject) => {
    const child = spawn(cmd[0]!, cmd.slice(1), { stdio: "ignore" });
    child.on("error", reject);
    child.on("close", (code) => {
      if (code === 0) resolve();
      else reject(new Error(`open browser exited with code ${code}`));
    });
  });
}