using UnityEngine;
using System;

public class PlayerHitHandler {

}

public class PlayerHealth {
  public int MaxHealth { get; private set; }
  public int CurrentHealth { get; private set; }
  public bool IsDead => CurrentHealth <= 0;

  public bool IsInvincible => Time.time < invincibleUntil;
  private float invincibleUntil = 0f;

  private float invincibilityDuration = 1f; // seconds

  public event Action<int, Vector2> OnTakeDamage;
  public event Action OnDeath;
  public event Action<int> OnHeal;

  public PlayerHealth(int maxHealth, float invincibilityDuration = 1f) {
    MaxHealth = maxHealth;
    CurrentHealth = maxHealth;
    this.invincibilityDuration = invincibilityDuration;
  }

  public void TakeDamage(int amount, Vector2 hitDirection) {
    if (IsDead || IsInvincible) return;

    CurrentHealth -= amount;
    CurrentHealth = Mathf.Max(CurrentHealth, 0);
    invincibleUntil = Time.time + invincibilityDuration;

    OnTakeDamage?.Invoke(amount, hitDirection);

    if (CurrentHealth == 0) {
      OnDeath?.Invoke();
    }
  }

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

    CurrentHealth += amount;
    CurrentHealth = Mathf.Min(CurrentHealth, MaxHealth);
    OnHeal?.Invoke(amount);
  }

  public void Reset() {
    CurrentHealth = MaxHealth;
    invincibleUntil = 0f;
  }
}