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

public class NetworkedAreaOfEffect : MonoBehaviour, IPunObservable
{
    [Header("Visuals:")]
    [SerializeField] protected GameObject telegraph;
    [SerializeField] protected GameObject effectVisual;
    [Header("Physics:")]
    [SerializeField] protected LayerMask abilityHitLayer;
    [Header("Hit VFX:")]
    [SerializeField] protected GameObject impactHitVFX;
    [Header("Optional:")]
    [SerializeField] protected bool shouldDisableVisualsOnDelayedDestroyEntered = true;

    [Header("Set by Code")]
    public PhotonView photonView;
    public PhotonView owner;
    public Taggable ownerTag;
    public AreaOfEffectAbility ability;
    public float radius;
    public bool shouldResizeVisuals;
    public float telegraphDelay;
    public float lifeSpan;
    public bool canHitSelf;

    protected PhotonView possibleTarget;
    protected Taggable target;
    protected List<Taggable> targets = new List<Taggable>();

    protected Vector3 resizedByAbility = new Vector3();

    protected Collider[] hits;

    protected bool waitingForDestroy = false;

    protected List<GameObject> hitSpawnedVFXs = new List<GameObject>();
    protected GameObject hitSpawnedVFX;
    protected Vector3 hitPositionCorrected;

    public UnityEvent<Vector3> onTargetHit = new UnityEvent<Vector3>();

    protected virtual void Awake()
    {
        photonView = GetComponent<PhotonView>();
        onTargetHit.AddListener(SpawnHitParticleVFX);
    }

    public virtual void Init()
    {
        waitingForDestroy = false;

        if (photonView.IsMine)
        {
            if (shouldResizeVisuals)
            {
                resizedByAbility.x = radius * 2;
                resizedByAbility.z = radius * 2;

                telegraph.transform.localScale = resizedByAbility;
                effectVisual.transform.localScale = resizedByAbility;
            }

            photonView.RPC(nameof(RPC_RemoteInit), RpcTarget.Others, AbilityIndexer.Instance.Abilities.IndexOf(ability));

            StartCoroutine(ApplyTelegraphDelay(telegraphDelay));
        }
    }

    [PunRPC]
    protected virtual void RPC_RemoteInit(int abilityIndex)
    {
        ability = (AreaOfEffectAbility)AbilityIndexer.Instance.Abilities[abilityIndex];
    }

    protected virtual IEnumerator ApplyTelegraphDelay(float delay)
    {
        ShowTelegraph();

        yield return new WaitForSeconds(delay);

        ApplyArea();
    }

    protected virtual void ApplyArea()
    {
        ShowEffectVisual();

        CheckSurroundings();

        //StartCoroutine(SelfDestruct());
    }

    [PunRPC]
    protected virtual void RPC_CheckSurroundings()
    {
        hits = Physics.OverlapSphere(this.transform.position, radius, abilityHitLayer);
        targets.Clear();
        foreach (Collider collider in hits)
        {
            possibleTarget = collider.GetComponentInParent<PhotonView>();
            if (possibleTarget != null)
                if (possibleTarget == owner && !canHitSelf) continue;

            target = collider.GetComponentInParent<Taggable>();


            if (target == null) continue;


            if (!target.IsValidTarget(ability.targettingTags)) continue;

            //Debug.Log("hit collider, added target: " + target.name);
            targets.Add(target);

        }

        for (int i = 0; i < targets.Count; i++)
        {
            hitPositionCorrected = targets[i].transform.position;
            hitPositionCorrected.y = 0.5f;

            onTargetHit.Invoke(hitPositionCorrected);
        }
    }


    protected void SpawnHitParticleVFX(Vector3 position)
    {
        if (impactHitVFX == null) return;

        hitSpawnedVFX = Instantiate(impactHitVFX, position, this.transform.rotation);

        hitSpawnedVFXs.Add(hitSpawnedVFX);

    }

    protected virtual void CheckSurroundings()
    {
        if (waitingForDestroy) return;

        hits = Physics.OverlapSphere(this.transform.position, radius, abilityHitLayer);
        targets.Clear();
        foreach (Collider collider in hits)
        {
            possibleTarget = collider.GetComponentInParent<PhotonView>();
            if (possibleTarget != null)
                if (possibleTarget == owner && !canHitSelf) continue;

            target = collider.GetComponentInParent<Taggable>();


            if (target == null) continue;


            if (!target.IsValidTarget(ability.targettingTags)) continue;

            //Debug.Log("hit collider, added target: " + target.name);
            targets.Add(target);

        }

        photonView.RPC(nameof(RPC_CheckSurroundings), RpcTarget.Others);

        if (!photonView.IsMine) return;

        for (int i = 0; i < targets.Count; i++)
        {
            hitPositionCorrected = targets[i].transform.position;
            hitPositionCorrected.y = 0.5f;

            onTargetHit.Invoke(hitPositionCorrected);
        }

        foreach (BaseEffect effect in ability.abilityEffects)
        {
            effect.ApplyEffect(ownerTag, targets);
        }

        waitingForDestroy = true;
        StartCoroutine(DelayedDestroy());
    }

    protected virtual void OnDrawGizmos()
    {
        Gizmos.color = Color.red;
        Gizmos.DrawWireSphere(this.transform.position, radius);
    }

    protected virtual IEnumerator SelfDestruct()
    {
        yield return new WaitForSeconds(lifeSpan);

        waitingForDestroy = true;

        StartCoroutine(DelayedDestroy());
    }


    protected virtual IEnumerator DelayedDestroy()
    {
        if (shouldDisableVisualsOnDelayedDestroyEntered)
            effectVisual.SetActive(false);

        yield return new WaitForSeconds(1.5f);


        for (int i = hitSpawnedVFXs.Count - 1; i >= 0; i--)
        {
            if (hitSpawnedVFXs[i] != null)
            {
                Destroy(hitSpawnedVFXs[i]);
            }
        }

        yield return new WaitForSeconds(1f);

        PhotonNetwork.Destroy(photonView);
    }

    protected void ShowTelegraph()
    {
        telegraph.SetActive(true);
        effectVisual.SetActive(false);
    }
    protected void ShowEffectVisual()
    {
        telegraph.SetActive(false);
        effectVisual.SetActive(true);
    }

    public void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
    {
        if (stream.IsWriting)
        {
            //stream.SendNext(telegraph.activeSelf);
            stream.SendNext(effectVisual.activeSelf);
        }
        if (stream.IsReading)
        {
            //telegraph.SetActive((bool)stream.ReceiveNext());
            effectVisual.SetActive((bool)stream.ReceiveNext());
        }
    }
}