using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using MyCollections.AI.FinitStateMachine;

[RequireComponent(typeof(Animator))]
public abstract class NPCConroller : MonoBehaviour, IHealthSystem
{
    [Header("NPC Attributes: ")]
    [SerializeField] protected float health;
    [SerializeField] protected float maxHealth;

    [SerializeField] protected FSM fsm;
    [SerializeField] protected Agent agent;
    protected Animator animator;
    protected FOV agentFOV;
    protected List<IObserver> observers = new List<IObserver>();

    public Agent Agent => agent;
    public Animator Animator => animator;
    public FOV AgentFOV => agentFOV;
    public float MaxHealth => maxHealth;
    public bool IsCoroutineRunning { get; set; }

    protected virtual void Awake()
    {
        if (!TryGetComponent(out agent))
        {
            Debug.LogError("Agent component not found on this GameObject!");
        }

        if(!TryGetComponent(out agentFOV))
            Debug.LogError($"{nameof(FOV)} component not found on this GameObject!");

        animator = GetComponent<Animator>();
    }

    // Start is called before the first frame update
    protected virtual void Start()
    {
        if (fsm != null)
            fsm.SetUp(this);
    }

    // Update is called once per frame
    protected virtual void Update()
    {
        if (fsm != null)
            fsm.GUpdate();

        AnimationController();
    }

    protected virtual void AnimationController()
    {

    }

    protected void NotifyObservers()
    {
        foreach (IObserver observer in observers)
        {
            observer.OnNotify(this); // Notify each observer, passing the NPCController as the object
        }
    }


    public virtual float CurrentHealth() => health;

    public virtual void Heal(float ammount) => health += ammount;

    public virtual bool IsDead() => health <= 0f;

    public virtual void TakeDamage(float ammount)
    {
        health -= ammount;
        NotifyObservers();
    }

    // Observer pattern methods
    public void AddObserver(IObserver observer)
    {
        if (!observers.Contains(observer))
        {
            observers.Add(observer);
        }
    }

    public void RemoveObserver(IObserver observer)
    {
        if (observers.Contains(observer))
        {
            observers.Remove(observer);
        }
    }
}