FebGameJam/Assets/Health.cs

using UnityEngine;
using UnityEngine.Events;
using System.Collections;

// @MindfulMinun
public class Health : MonoBehaviour {
    public int startingHealth = 3;
    public float damageTimeout = 1f;
    public int currentHealth;
    public bool isInvincible;
    public bool isDead;
    public UnityEvent OnDead = new UnityEvent();
    public UnityEvent OnHit = new UnityEvent();

    void Start() {
        currentHealth = startingHealth;
    }

    void Update() {
        if (Input.GetKeyDown(KeyCode.E)) {
            takeHit();
        }
    }

    public void takeHit() {
        if (isInvincible) return;
        currentHealth = Mathf.Clamp(currentHealth - 1, 0, startingHealth);
        isDead = currentHealth <= 0;
        OnHit.Invoke();
        if (isDead) OnDead.Invoke();
        StartCoroutine(damageTimer());
    }

    // Waits for a second before allowing the player to take damage again
    private IEnumerator damageTimer() {
        bool wasInvincible = isInvincible;
        isInvincible = true;
        yield return new WaitForSeconds(damageTimeout);
        isInvincible = wasInvincible;
    }
}