using System;
using UnityEngine;

public class Health : MonoBehaviour
{
    [SerializeField] private int _maxHealth = 30;
    private int _currentHealth;

    public int MaxHealth => _maxHealth;
    public int CurrentHealth => _currentHealth;
    public float Ratio => _maxHealth > 0 ? (float)_currentHealth / _maxHealth : 0f;
    public bool IsDead => _currentHealth <= 0;

    public event Action<int, int> OnHealthChanged;
    public event Action OnDied;

    private void Awake()
    {
        _currentHealth = _maxHealth;
    }

    public void TakeDamage(int amount)
    {
        if (amount <= 0 || IsDead) return;

        int previous = _currentHealth;
        _currentHealth = Mathf.Max(_currentHealth - amount, 0);
        OnHealthChanged?.Invoke(_currentHealth, _maxHealth);

        if (_currentHealth <= 0 && previous > 0)
            OnDied?.Invoke();
    }

    public void Heal(int amount)
    {
        if (amount <= 0 || IsDead) return;

        _currentHealth = Mathf.Min(_currentHealth + amount, _maxHealth);
        OnHealthChanged?.Invoke(_currentHealth, _maxHealth);
    }

    public void ResetHealth()
    {
        _currentHealth = _maxHealth;
        OnHealthChanged?.Invoke(_currentHealth, _maxHealth);
    }

    public void SetMaxHealth(int newMax, bool fill = true)
    {
        _maxHealth = Mathf.Max(newMax, 1);
        if (fill) _currentHealth = _maxHealth;
        else _currentHealth = Mathf.Min(_currentHealth, _maxHealth);
        OnHealthChanged?.Invoke(_currentHealth, _maxHealth);
    }
}