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

public class AnimationEventHandler : MonoBehaviour
{
    [HideInInspector] public UnityEvent<object> onAttack;
    [HideInInspector] public UnityEvent<object> onAttackCheck;
    [HideInInspector] public UnityEvent<object> onAttackEnd;
    [HideInInspector] public UnityEvent<object> onHit;
    Animator animator;
    readonly List<AnimationClip> activeClips = new List<AnimationClip>();

    // Start is called before the first frame update
    void Start()
    {
        animator = GetComponent<Animator>();
    }

    public void RegisterAsActiveClip(AnimationClip clip)
    {
        if (!activeClips.Exists(o => o == clip))
            activeClips.Add(clip);
        Debug.Log($"{clip.name} registered");
    }

    public void UnregisterFromActiveClip(AnimationClip clip)
    {
        activeClips.Remove(clip);
        Debug.Log($"{clip.name} unregistered. Remaining clips in transition {activeClips.Count}");
    }

    bool isInTransition
    {
        get
        {
            AnimationClip currentClip = null;
            for (int i = 1; i < animator.layerCount; i++)
                if (animator.GetLayerWeight(i) == 1)
                {
                    if (animator.IsInTransition(i) == false)
                        return false;
                    currentClip = animator.GetCurrentAnimatorClipInfo(i)[0].clip;
                }

            if (activeClips.Exists(o => o == currentClip))
            {
                Debug.Log($"{currentClip.name} is IN TRANSITION");
                return true;
            }
            return false;
        }
    }

    void Attack(object param)
    {
        if (isInTransition == false)
            onAttack?.Invoke(param);
    }

    void Hit(object param)
    {
        onHit?.Invoke(param);
    }

    void AttackCheck(string param)
    {
        if (isInTransition == false)
            onAttackCheck?.Invoke(param);
    }

    void AttackEnd(string param)
    {
        Debug.Log("Attack End");
        if (isInTransition == false)
            onAttackEnd?.Invoke(param);
    }
}