import { getSupabaseAdminClient } from "@/lib/supabase/admin";
import { ABSOLUTE_SESSION_CAP_SECONDS } from "@/lib/auth/jwt";

export async function createSession(userId: string): Promise<{ id: string; iat_original: number }> {
  const admin = getSupabaseAdminClient();
  const { data, error } = await admin
    .from("user_sessions")
    .insert({ user_id: userId })
    .select("id, iat_original")
    .single();
  if (error || !data) throw new Error("Failed to create session");
  return {
    id: data.id,
    iat_original: Math.floor(new Date(data.iat_original).getTime() / 1000),
  };
}

/**
 * Returns true iff the session row exists, is not revoked, and the
 * absolute-cap (30 days from `iat_original`) has not elapsed.
 *
 * Side-effect (fire-and-forget): updates `last_seen_at`.
 */
export async function isSessionLive(sessionId: string, iatOriginal: number): Promise<boolean> {
  const admin = getSupabaseAdminClient();
  const { data } = await admin
    .from("user_sessions")
    .select("revoked_at")
    .eq("id", sessionId)
    .maybeSingle();
  if (!data || data.revoked_at) return false;
  if (Math.floor(Date.now() / 1000) - iatOriginal > ABSOLUTE_SESSION_CAP_SECONDS) {
    return false;
  }
  void admin
    .from("user_sessions")
    .update({ last_seen_at: new Date().toISOString() })
    .eq("id", sessionId);
  return true;
}

export async function revokeSession(sessionId: string): Promise<void> {
  const admin = getSupabaseAdminClient();
  await admin
    .from("user_sessions")
    .update({ revoked_at: new Date().toISOString() })
    .eq("id", sessionId);
}