using System;
using UnityEngine;

public class Health : MonoBehaviour
{
    [SerializeField] private int maxHitPoint = 5;
    [SerializeField] private bool destroyOnDeath = true;

    private int currentHitPoint;

    public int CurrentHitPoint => currentHitPoint;
    public int MaxHitPoint => maxHitPoint;
    public bool IsDead => currentHitPoint <= 0;

    public event Action<int, int> Changed;
    public event Action Died;

    private void Awake()
    {
        currentHitPoint = maxHitPoint;
    }

    private void Start()
    {
        Changed?.Invoke(currentHitPoint, maxHitPoint);
    }

    public void TakeDamage(int amount)
    {
        if (IsDead)
        {
            return;
        }

        currentHitPoint = Mathf.Max(0, currentHitPoint - amount);
        Changed?.Invoke(currentHitPoint, maxHitPoint);

        if (currentHitPoint == 0)
        {
            Died?.Invoke();

            if (destroyOnDeath)
            {
                Destroy(gameObject);
            }
        }
    }

    public void Heal(int amount)
    {
        if (IsDead)
        {
            return;
        }

        currentHitPoint = Mathf.Min(maxHitPoint, currentHitPoint + amount);
        Changed?.Invoke(currentHitPoint, maxHitPoint);
    }
}