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

public class NetworkedProjectile : MonoBehaviour
{
    [Header("Visuals")]
    [SerializeField] private GameObject hitParticlesPrefab;
    [SerializeField] private GameObject visuals;

    [Header("Set by code")]
    public Taggable ownerTag;
    public BaseAbility ability;
    public float speed;
    public float lifeSpan;
    public bool canPierce;
    public bool canHitSelf;
    public AnimationCurve speedOverLifetime = AnimationCurve.Linear(0, 1, 1, 1);
    public bool useSpeedCurve = false;
    public bool enableCurving = false;
    public Vector3 curveAxis = Vector3.up;
    public float curveStrength = 1f;
    public float curveAmplitude = 45f;

    public bool enableRicochet = false;
    public int maxRicochets = 1;
    public float ricochetSpread = 10f;

    private Taggable target;

    private bool waitingForDestroy = false;

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

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

    protected List<Taggable> processedTargets = new List<Taggable>();

    NetworkedAntiProjectile possibleBlock;

    private float timeAlive = 0f;
    private int ricochetCount = 0;
    Vector3 incomingDir = new Vector3();
    Vector3 hitNormal = new Vector3();
    Vector3 reflected = new Vector3();

    private void Awake()
    {
        onTargetHit.AddListener(SpawnHitParticleVFX);
    }
    public void Init()
    {
        waitingForDestroy = false;


        StartCoroutine(SelfDestruct());

    }


    private void SpawnHitParticleVFX(Vector3 position)
    {
        if (hitParticlesPrefab == null) return;

        hitSpawnedVFX = Instantiate(hitParticlesPrefab, position, this.transform.rotation);
        //hitSpawnedVFX.transform.localScale = visuals.transform.localScale;

        hitSpawnedVFXs.Add(hitSpawnedVFX);
    }
    private void Update()
    {
        if (waitingForDestroy) return;

        timeAlive += Time.deltaTime;

        float lifetimeFraction = Mathf.Clamp01(timeAlive / lifeSpan);
        float currentSpeed = useSpeedCurve ? speed * speedOverLifetime.Evaluate(lifetimeFraction) : speed;

       
        // Curving logic
        if (enableCurving)
        {
            float curveOffset = Mathf.Sin(timeAlive * curveStrength) * curveAmplitude * Time.deltaTime;
            transform.Rotate(curveAxis.normalized * curveOffset, Space.World);
        }

        transform.position += transform.forward * currentSpeed * Time.deltaTime;
    }

    private void OnTriggerEnter(Collider other)
    {
        if (waitingForDestroy) return;

        if (other.GetComponent<IBreakable>() != null)
        {
            other.GetComponent<IBreakable>().Hit();

            onTargetHit.Invoke(this.transform.position);

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

        target = other.GetComponentInParent<Taggable>();

        if (target == null) return;

        if (target == ownerTag && !canHitSelf) return;

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

        if (processedTargets.Contains(target)) return;

        processedTargets.Add(target);

        hitPositionCorrected = target.transform.position;
        hitPositionCorrected.y = this.transform.position.y;
        onTargetHit.Invoke(hitPositionCorrected);

        possibleBlock = target.GetComponentInParent<NetworkedAntiProjectile>();
        if (possibleBlock != null)
        {
            waitingForDestroy = true;

            possibleBlock.SendBlockNotice();

            StartCoroutine(DelayedDestroy());
            return;
        }

        foreach (BaseEffect effect in ability.abilityEffects)
        {
            effect.ApplyEffect(ownerTag, new List<Taggable> { target });
        }

        try
        {
            target.GetComponentInChildren<Animator>()?.SetTrigger("hurt");
        }
        catch (System.Exception)
        {
            Debug.Log("No Hurt trigger");
        }


        if (!canPierce)
        {
            if (enableRicochet && ricochetCount < maxRicochets)
            {
                incomingDir = transform.forward;
                hitNormal = other.ClosestPoint(transform.position) - transform.position;
                hitNormal = hitNormal.normalized;

                reflected = Vector3.Reflect(incomingDir, hitNormal);

                // Add spread
                reflected = Quaternion.Euler(Random.Range(-ricochetSpread, ricochetSpread),
                                             Random.Range(-ricochetSpread, ricochetSpread),
                                             0) * reflected;

                transform.forward = reflected;
                ricochetCount++;
                return;
            }

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

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

        waitingForDestroy = true;

        StartCoroutine(DelayedDestroy());
    }


    IEnumerator DelayedDestroy()
    {
        visuals.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);

        Destroy(this.gameObject);
    }
}