// =============================================================================
// Open a URL in the user's default browser. Platform-specific, no dependencies.
// =============================================================================

import { execFile } from "node:child_process";

const CONTROL_CHAR_REGEX = /[\u0000-\u001F\u007F]/;

function isSafeHttpUrl(url: string): boolean {
  if (!url || CONTROL_CHAR_REGEX.test(url)) return false;

  try {
    const parsed = new URL(url);
    return parsed.protocol === "http:" || parsed.protocol === "https:";
  } catch {
    return false;
  }
}

export function openUrl(url: string): void {
  if (!isSafeHttpUrl(url)) {
    return;
  }

  const platform = process.platform;
  let command = "xdg-open";
  let args = [url];

  if (platform === "darwin") {
    command = "open";
  } else if (platform === "win32") {
    command = "rundll32";
    args = ["url.dll,FileProtocolHandler", url];
  }

  execFile(command, args, (err) => {
    if (err) {
      // Silently fail — the URL is always printed as fallback
    }
  });
}