/**
 * Helpers for first-party Briven Auth proxy (same pattern as Mavi).
 * Browser → /api/auth/* → https://api.briven.tech/v1/auth-core/fdi/*
 */

/** Strip Domain= so Set-Cookie sticks to localhost / your app host. */
export function rewriteSetCookieForFirstParty(setCookie: string): string {
  return setCookie
    .replace(/;\s*[Dd]omain=[^;]*/g, "")
    .replace(/;\s*[Ss]ame[Ss]ite=None/gi, "; SameSite=Lax");
}

export function brivenUpstreamOrigin(): string {
  return (
    process.env.BRIVEN_API_ORIGIN ||
    process.env.NEXT_PUBLIC_BRIVEN_API_ORIGIN ||
    "https://api.briven.tech"
  ).replace(/\/$/, "");
}

export function collectSetCookies(headers: Headers): string[] {
  const anyHeaders = headers as Headers & { getSetCookie?: () => string[] };
  if (typeof anyHeaders.getSetCookie === "function") {
    return anyHeaders.getSetCookie();
  }
  const single = headers.get("set-cookie");
  return single ? [single] : [];
}