export const DEFAULT_GITHUB_COPILOT_BASE_URL = "https://api.githubcopilot.com";

export function resolveGithubCopilotUserAgent(): string {
  const version = process.env.CLAWDBOT_VERSION ?? process.env.npm_package_version ?? "unknown";
  return `clawdbot/${version}`;
}

export function normalizeGithubCopilotDomain(input: string | null | undefined): string | null {
  const trimmed = (input ?? "").trim();
  if (!trimmed) return null;
  try {
    const url = trimmed.includes("://") ? new URL(trimmed) : new URL(`https://${trimmed}`);
    return url.hostname;
  } catch {
    return null;
  }
}

export function resolveGithubCopilotBaseUrl(enterpriseDomain?: string | null): string {
  if (enterpriseDomain && enterpriseDomain.trim()) {
    return `https://copilot-api.${enterpriseDomain.trim()}`;
  }
  return DEFAULT_GITHUB_COPILOT_BASE_URL;
}