using UnityEngine;
using UnityEngine.SceneManagement;

/// <summary>
/// Manages game state and responds to core destruction.
/// </summary>
public class GameManager : MonoBehaviour
{
    [SerializeField] private Core coreReference;

    private bool _isGameOver = false;
    private HealthComponent _coreHealth;

    private void Start()
    {
        // Find Core if not assigned
        if (coreReference == null)
        {
            coreReference = FindFirstObjectByType<Core>();
        }

        // Subscribe to core's health component
        if (coreReference != null)
        {
            _coreHealth = coreReference.Health;
            if (_coreHealth != null)
            {
                _coreHealth.OnDeath += GameOver;
            }
        }
    }

    private void OnDestroy()
    {
        // Unsubscribe to prevent memory leaks
        if (_coreHealth != null)
        {
            _coreHealth.OnDeath -= GameOver;
        }
    }

    private void GameOver()
    {
        if (_isGameOver) return;

        _isGameOver = true;
        Debug.Log("Game Over! Core has been destroyed.");

        // Show defeat UI here
        // Example: restart game after 3 seconds
        Invoke(nameof(RestartGame), 3f);
    }

    private void RestartGame()
    {
        SceneManager.LoadScene(SceneManager.GetActiveScene().buildIndex);
    }
}