export function shouldUseNodeDCOIDC(): boolean {
  const flag = process.env.VITE_NODEDC_OIDC_LOGIN_ENABLED;

  if (flag === "1" || flag === "true") {
    return true;
  }

  if (flag === "0" || flag === "false") {
    return false;
  }

  if (typeof window === "undefined") {
    return false;
  }

  const hostname = window.location.hostname.toLowerCase();
  return hostname.endsWith(".local.nodedc") || hostname.endsWith(".notdc.ru") || hostname.endsWith(".nodedc.ru");
}

export function buildNodeDCOIDCLoginUrl(nextPath?: string | null): string {
  const configuredUrl = process.env.VITE_NODEDC_OIDC_LOGIN_URL || "/auth/oidc/login/";
  const url = new URL(configuredUrl, window.location.origin);
  const safeNextPath = sanitizeNextPath(nextPath || getCurrentRelativePath());

  if (safeNextPath) {
    url.searchParams.set("next_path", safeNextPath);
  }

  return url.toString();
}

export function buildNodeDCLauncherUrl(): string {
  return process.env.VITE_NODEDC_LAUNCHER_URL || "http://launcher.local.nodedc/";
}

export function getCurrentRelativePath(): string {
  if (typeof window === "undefined") {
    return "/";
  }

  return `${window.location.pathname}${window.location.search}`;
}

export function sanitizeNextPath(value?: string | null): string {
  if (!value || !value.startsWith("/") || value.startsWith("//")) {
    return "/";
  }

  return value;
}