using UnityEngine;
using Spine.Unity;
using Skill_V2;
using System.Collections.Generic;

public class IVMate : Entity
{
    [SerializeField] uint id;
    [SerializeField] SkeletonAnimation skeletonAnimation;
    [SerializeField] CircleCollider2D castSkillDistance;
    [SerializeField] StateHandler stateHandler;
    [SerializeField] Skill skillPrefab;

    Skill skillInstance;

    ContactFilter2D castSkillDistFilter;
    List<Collider2D> castSkillDistOverlaped = new List<Collider2D>();

    public MateData Data { get; private set; }
    public SkeletonAnimation SkeletonAnimation => skeletonAnimation;
    public bool IsSafeChange => stateHandler.CurrentState is IVMateIdle || stateHandler.CurrentState is IVMateChasePlayer;
    public bool IsCastSkillAvailable => IsSafeChange && !Skill.IsInCoolTime && IsEnemyExistInCastSkillDistance;
    public bool IsEnemyExistInCastSkillDistance
    {
        get
        {
            castSkillDistance.radius = Data.DefaultCastSkillDistance;

            castSkillDistOverlaped.Clear();
            castSkillDistance.OverlapCollider(castSkillDistFilter, castSkillDistOverlaped);

            for(int i = 0; i < castSkillDistOverlaped.Count; ++i)
            {
                var overlapped = castSkillDistOverlaped[i];

                if (overlapped.CompareTag("Enemy") && overlapped.TryGetComponent(out CreatureBase creature) && creature.IsBattleAvail())
                    return true;
            }

            return false;
        }
    }    

    public Skill Skill => skillInstance;

    private void Awake()
    {
#if UNITY_EDITOR
        if (MateDataGroup.Instance.TryGetMateData(id, out MateData result))
            Data = result;
        else
            Logger.LogError("MateDataGroup does not have MateData with id: " + id);
#else
        MateDataGroup.Instance.TryGetMateData(id, out Data);
#endif

        skillInstance = Instantiate(skillPrefab);
        skillInstance.Stop();
    }

    private void OnDestroy()
    {
        if(skillInstance != null)
        {
            skillInstance.Stop();
            Destroy(skillInstance.gameObject);
        }
    }

    public void UpdateSkillCoolTime() => skillInstance.UpdateSkillCoolTime();

    public void Spawn(IVCharacter player, Vector2 lookDir, Transform spawnPosition = null)
    {
        gameObject.SetActive(true);
        stateHandler?.ChangeState(new IVMateAppear(this, player, lookDir, spawnPosition));
    }

    public void Dispose()
    {
        stateHandler?.ChangeState(new IVMateDisappear(this, () => gameObject.SetActive(false)));
    }

    public bool CastSkill()
    {
        if (IsCastSkillAvailable)
        {
            stateHandler?.ChangeState(new IVMateCastSkill(this, BattleMgr.Instance.GetPlayer()));
            return true;
        }

        return false;
    }
}