using UnityEngine;
using System;

/// <summary>
/// Enemy health handler.
/// Uses HealthComponent for health management.
/// </summary>
[RequireComponent(typeof(HealthComponent))]
public class EnemyHealth : MonoBehaviour
{
    private HealthComponent _health;

    /// <summary>
    /// Event fired when this enemy dies.
    /// </summary>
    public event Action OnEnemyDeath;

    void Awake()
    {
        _health = GetComponent<HealthComponent>();

        // Subscribe to health component events
        _health.OnDamaged += HandleDamaged;
        _health.OnDeath += HandleDeath;
    }

    void OnDestroy()
    {
        if (_health != null)
        {
            _health.OnDamaged -= HandleDamaged;
            _health.OnDeath -= HandleDeath;
        }
    }

    private void HandleDamaged(DamageInfo info)
    {
        Debug.Log($"{gameObject.name} took {info.Amount} damage. Remaining: {_health.CurrentHealth}");
    }

    private void HandleDeath()
    {
        Debug.Log($"{gameObject.name} died!");

        // Fire event for external listeners (score system, spawner, etc.)
        OnEnemyDeath?.Invoke();

        // Destroy the enemy
        Destroy(gameObject);
    }

    /// <summary>
    /// Get the health component for direct access if needed.
    /// </summary>
    public HealthComponent Health => _health;

    /// <summary>
    /// Get the current health (convenience property).
    /// </summary>
    public float CurrentHealth => _health != null ? _health.CurrentHealth : 0f;

    /// <summary>
    /// Get the max health (convenience property).
    /// </summary>
    public float MaxHealth => _health != null ? _health.MaxHealth : 0f;
}