import { SignJWT, jwtVerify } from "jose";
import { getEnv } from "@/lib/env";

export const SESSION_COOKIE_NAME = "bp_session";
const SESSION_MAX_AGE_SECONDS = 60 * 60 * 24 * 30; // 30 days

function signingKey(): Uint8Array {
  return new TextEncoder().encode(getEnv().AUTH_SECRET);
}

export async function createSessionToken(): Promise<string> {
  return new SignJWT({})
    .setProtectedHeader({ alg: "HS256" })
    .setSubject("app")
    .setIssuedAt()
    .setExpirationTime(`${SESSION_MAX_AGE_SECONDS}s`)
    .sign(signingKey());
}

export async function verifySessionToken(token: string | undefined | null): Promise<boolean> {
  if (!token) return false;
  try {
    await jwtVerify(token, signingKey());
    return true;
  } catch {
    return false;
  }
}

export const sessionCookieOptions = {
  name: SESSION_COOKIE_NAME,
  httpOnly: true,
  secure: true,
  sameSite: "lax" as const,
  path: "/",
  maxAge: SESSION_MAX_AGE_SECONDS,
};