'use client';

import { useEffect, useRef } from 'react';

const HANDOFF_TIMEOUT_MS = 10_000;

type AuthSession = {
  user?: {
    id?: string;
  };
} | null;

type UseAuthHandoffOptions = {
  nextPath: string;
  session: AuthSession;
  isPending: boolean;
  awaitingSession: boolean;
  onTimeout: () => void;
};

export function useAuthHandoff({
  nextPath,
  session,
  isPending,
  awaitingSession,
  onTimeout
}: UseAuthHandoffOptions) {
  const hasNavigatedRef = useRef(false);
  const hasSession = Boolean(session?.user?.id);

  useEffect(() => {
    if (typeof window === 'undefined' || isPending || !hasSession || hasNavigatedRef.current) {
      return;
    }

    hasNavigatedRef.current = true;
    window.location.replace(nextPath);
  }, [hasSession, isPending, nextPath]);

  useEffect(() => {
    if (typeof window === 'undefined' || !awaitingSession || hasSession || hasNavigatedRef.current) {
      return;
    }

    const timeoutId = window.setTimeout(() => {
      onTimeout();
    }, HANDOFF_TIMEOUT_MS);

    return () => {
      window.clearTimeout(timeoutId);
    };
  }, [awaitingSession, hasSession, onTimeout]);

  return {
    isHandingOff: awaitingSession || (!isPending && hasSession),
    statusText: awaitingSession
      ? 'Establishing your session and opening the workspace...'
      : null
  };
}