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

public class SoldierStateShoot : BaseState<SoldierUnit>
{
    private TimerUnit mShootTimer;
    private TimerUnit mActiveTimer;

    private float mAtkAniLength = 1;
    private GameObject mArrowPrefab;
    
    public override void EnterState(Type pLastState)
    {
        base.EnterState(pLastState);

        if (mShootTimer == null)
        {
            mShootTimer = TimerManager.Instance.CreateTimerUnit();
        }

        if (mActiveTimer == null)
        {
            mActiveTimer = TimerManager.Instance.CreateTimerUnit();
        }

        if (mArrowPrefab == null)
        {
            mArrowPrefab = ResourceManager.Instance.LoadRes<GameObject>(Const.Path.GetBullet(mMaster.BType, mMaster.Level, mMaster.Group == GroupType.Player));
        }

        mAtkAniLength = mMaster.MetaData.AtkAniLength;

        ShootOnce();
    }

    public override void ExecuteState(float pDeltaTime)
    {
        base.ExecuteState(pDeltaTime);
    }

    public override void ExitState(Type pNextState)
    {
        base.ExitState(pNextState);

        mActiveTimer.CancelTimer();
        mShootTimer.CancelTimer();
    }

    private void ShootOnce()
    {
        mMaster.ShootTarget = mMaster.AgainstGroup.GetNearestTarget(mMaster.transform.position, mMaster.AtkDistance);
        if (mMaster.ShootTarget != null && !mMaster.ShootTarget.IsDead)
        {
            mMaster.LookToTarget(mMaster.ShootTarget.RelativePos(mMaster.RelativePos()));
            mMaster.SetACTrigger(SoldierACTrigger.TriggerAttack, Mathf.Max(mAtkAniLength / mMaster.AtkInterval, mAtkAniLength));

            mActiveTimer.StartTimer(ActiveOnce, Mathf.Min(mAtkAniLength * 0.6f, mMaster.AtkInterval * 0.6f));
            mShootTimer.StartTimer(ShootOnce, mMaster.AtkInterval);
            //mShootTimer.StartTimer(ShootOnce, Mathf.Min(mAtkAniLength, mMaster.AtkInterval));
        }
        else
        {
            ChangeState(typeof(SoldierStateIdle));
        }
    }

    private void ActiveOnce()
    {
        GameObject tAtkFx = ResourceManager.Instance.LoadRes<GameObject>(Const.Path.GetAtkFx(mMaster.BType, mMaster.Level, mMaster.Group == GroupType.Player));
        if (tAtkFx != null)
        {
            Transform tFxTrans = mMaster.AtkTrans ? mMaster.AtkTrans : mMaster.transform;
            GameObject.Instantiate(tAtkFx, tFxTrans.position, tFxTrans.rotation);
        }

        Arrow tArrow = GameObject.Instantiate(mArrowPrefab).GetComponent<Arrow>();

        Vector3 tInitPos = mMaster.AtkTrans ? mMaster.AtkTrans.position : mMaster.RelativePos() + Vector3.up;
        Vector3 tTargetPos = mMaster.ShootTarget.HitTrans ? mMaster.ShootTarget.HitTrans.position : mMaster.ShootTarget.RelativePos() + Vector3.up;

        tArrow.Init(Utils.CountDamage(mMaster.Level, mMaster.ShootTarget.Level, mMaster.Damage), tInitPos, tTargetPos, mMaster.ShootTarget);
    }
}