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


public class DropItemTrace : MonoBehaviour
{
    GActor m_Target;
    Vector3 offset;
    Vector3 refVelocity;

    float speed = 7f;
    float timer = 0f;
    Action onReach;

    SFXController m_Effect;

    public void Trace(GActor _actor, Vector3 _offset, Action _onReach)
    {
        m_Target = _actor;
        offset = _offset;
        refVelocity = Vector3.zero;
        onReach = _onReach;
        timer = 0f;
        if (m_Effect == null)
        {
            m_Effect = SFXPlayUtility.Instance.Play(1999, this.transform);
        }
    }

    private void LateUpdate()
    {
        timer += Time.deltaTime;

        if (m_Target == null || Vector3.Distance(this.transform.position, m_Target.Pos + offset) < 0.3f)
        {
            if (m_Effect != null)
            {
                SFXPlayUtility.Instance.Release(m_Effect);
                m_Effect = null;
            }

            m_Target = null;
            if (onReach != null)
            {
                onReach();
                onReach = null;
            }
        }
        else
        {
            speed = Mathf.Clamp(2 + timer * 4f, 2f, 7f);
            var targetPosition = m_Target.Pos + offset;
            var deltaPosition = (targetPosition - this.transform.position).normalized * speed * Time.deltaTime;

            this.transform.position += deltaPosition;
        }

    }



}