using Entitas;
using UnityEngine;
using Game;

/// <summary>
/// 麻薯的管理
/// </summary>
public class MasterSoulSystem : IExecuteSystem, IInitializeSystem
{
    public static float ShakeTerm = 1.5f; //抖动周期
    public static float ShakeDistance = 0.0625f; //抖动幅度 直径为2像素
    public static float ShakeRate = (2 * Mathf.PI) / ShakeTerm; //sin抖动方程a值
    public void Initialize()
    {
    }
    public void Execute()
    {
        var entity = Util.GetMasterSoul();
        if (entity == null)
        {
            return;
        }
        CheckInit(entity);
        UpdateMove(entity);
        UpdateShootPre(entity);
        UpdateShoot(entity);
    }
    public void CheckInit(GameEntity entity)
    {
        var masterSoul = entity.masterSoul;
    }
    public void UpdateMove(GameEntity entity)
    {
        var master = Util.GetMaster();

        var targetPos = master.Pos() + new Vector3(0.2f * (master.move.IsRight ? -1 : 1), 0, 0.2f);
        targetPos = new Vector3(targetPos.x, 0, targetPos.z);
        var nowPos = entity.Pos();
        var distance = Vector3.Distance(targetPos, nowPos);

        if (distance > 5)
        {
            entity.SetPos(targetPos);
            return;
        }

        if (distance < 0.2f)
        {
            if (Util.EntityIsWalk(entity.ID()))
            {
                Util.EntityStopMove(entity.ID());
                Util.SetMasterSoulDir(entity, Vector2.down);
            }
            return;
        }
        var masterSoul = entity.masterSoul;
        var moveSpeed = distance * distance * 4;
        var moveDir = (targetPos - nowPos).normalized;
        entity.move.MoveParam.MoveSpeedMax = moveSpeed;
        Util.EntityMove(entity.ID(), moveDir);
        Util.SetMasterSoulDir(entity, -new Vector2(moveDir.x, moveDir.z));
    }
    public void UpdateShootPre(GameEntity entity)
    {
        var masterSoul = entity.masterSoul;
        var preList = masterSoul.ShootPreList;
        for (int i = preList.Count - 1; i >= 0; i--)
        {
            var info = preList[i];
            info.TimeLeft -= Time.deltaTime;
            if (info.TimeLeft <= 0)
            {
                for (int j = 0; j < info.Count; j++)
                {
                    masterSoul.ShootTargetQueue.Enqueue(info.Target);
                }
                preList.RemoveAt(i);
            }
        }
    }
    public void UpdateShoot(GameEntity entity)
    {
        var masterSoul = entity.masterSoul;
        if (masterSoul.ShootTimeLeft > 0)
        {
            masterSoul.ShootTimeLeft -= Time.deltaTime;
            return;
        }
        if (masterSoul.ShootTimeLeft < 0)
        {
            masterSoul.ShootTimeLeft = 0;
        }
        if (masterSoul.ShootTargetQueue.Count == 0)
        {
            return;
        }
        var targetId = masterSoul.ShootTargetQueue.Dequeue();
        var target = Util.GetEntity(targetId);
        if (target == null)
        {
            return;
        }
        masterSoul.ShootTimeLeft = GameConst.MasterSoulShootTime;
        var pos = entity.view.PositionView;
        var posTarget = target.view.PositionLogic;
        var dir = posTarget - pos;
        Util.CreateSubEntity(0, entity.ID(), targetId, dir, pos);
    }
}