using Core.Health;
using Core.Utilities;
using System.Collections;
using System.Collections.Generic;
using TowerDefense.Agents;
using UnityEngine;

public class AgentResetPosEffect : AgentEffect
{
    protected bool bPosReset = false;
    /// <summary>
    /// 重设到开始位置的特效
    /// </summary>
    protected GameObject m_PosResetFx;

    protected Timer m_DestroyTimer;
    protected Timer m_PosResetTimer;
    /// <summary>
    /// 用于备份粒子系统的默认Scale，在设置完Parent之后，会有对自己Scale的设置，从而导致还回内存池之后,
    /// LocalScale会缩小的情况发生。
    /// </summary>
    protected Vector3 m_BackScale;

    /// <summary>
    /// 初始化当前的位置重设特效
    /// </summary>
    /// <param name="posResetFx"></param>
    /// <param name="position"></param>
    /// <param name="scale"></param>
    public void Initialize( float maxPlaySec,GameObject posResetFx = null,Vector3 position = default(Vector3), float scale = 1.0f)
    {
        if ((posResetFx == null) || (m_PosResetFx != null)) return;

        if( !m_Agent)
            return;

        position.y = 0.2f;
        m_PosResetFx = Poolable.TryGetPoolable(posResetFx);

        m_BackScale = m_PosResetFx.transform.localScale;
        m_PosResetFx.transform.SetParent(transform, true);
        m_PosResetFx.transform.localPosition = position;
        m_PosResetFx.transform.localScale *= scale;
        var particle = m_PosResetFx.GetComponent<ParticleSystem>();
        if( particle)
        {
            particle.Simulate(0.0f);
            particle.Play();
        }
        
        m_Agent.removed += OnRemoved;

        m_DestroyTimer = new Timer(maxPlaySec, RemoveEffect);
        m_PosResetTimer = new Timer(maxPlaySec / 5.0f, resetInitPosition);
        m_Agent.navMeshNavMeshAgent.speed = 0.0f;
    }

    public void Update()
    {
        m_DestroyTimer.Tick(Time.deltaTime);

        if( !bPosReset )
            m_PosResetTimer.Tick(Time.deltaTime);
    }

    protected void RemoveEffect()
    {
        m_Agent.removed -= OnRemoved;
        ResetAgent();
    }

    /// <summary>
    /// 重设当前的Agent到开始位置.
    /// </summary>
    protected void resetInitPosition()
    {
        m_Agent.navMeshNavMeshAgent.speed = m_Agent.originalMovementSpeed;
        m_Agent.ResetAgentToInitialPos();
        bPosReset = true;
       
    }

    void OnRemoved(DamageableBehaviour targetable)
    {
        m_Agent.removed -= OnRemoved;
        ResetAgent();
    }

    void ResetAgent()
    {
        m_Agent.navMeshNavMeshAgent.speed = m_Agent.originalMovementSpeed;
        if (m_PosResetFx != null)
        {
            var particle = m_PosResetFx.GetComponent<ParticleSystem>();
            if (particle)
                particle.Stop();
            Poolable.TryPool(m_PosResetFx);
            m_PosResetFx.transform.localScale = m_BackScale;
            m_PosResetFx = null;
        }
        Destroy(this);
    }
}