using Entitas;
using UnityEngine;
using Game;
public class PointSystem : IExecuteSystem, IInitializeSystem
{
    private IGroup<GameEntity> _entities;
    public void Initialize()
    {
        _entities = Util.GetGroup(GameMatcher.Point);
    }
    public void Execute()
    {
        foreach (var entity in _entities)
        {
            UpdatePoint(entity);
        }
    }
    public void UpdatePoint(GameEntity entity)
    {
        var point = entity.point;
        var move = entity.move;
        var master = Util.GetMaster();
        switch (point.State)
        {
            case EPointState.Create:
                move.Rigidbody.velocity = point.CastSpeed * 5;
                point.State = EPointState.CreateWait;
                point.TimeLeft = 1;
                break;
            case EPointState.CreateWait:
                point.TimeLeft -= Time.deltaTime;
                if (point.TimeLeft <= 0)
                {
                    point.TimeLeft = 0;
                    point.State = EPointState.Running;
                }
                break;
            case EPointState.Running:
                var targetPos = master.Pos();
                var nowPos = entity.Pos();
                var distance = Vector3.Distance(targetPos, nowPos);
                var view = entity.view;
                var moveSpeed = 0f;
                if (distance > 1.5)
                {
                    Util.EntityStopMove(entity.ID());
                }
                else
                {
                    if (distance > 0.1f)
                    {
                        var moveDir = (targetPos - nowPos).normalized;
                        moveSpeed = 2 / distance;
                        entity.move.MoveParam.MoveSpeedMax = moveSpeed;
                        Util.EntityMove(entity.ID(), moveDir);
                    }
                    else
                    {
                        Util.EntityStopMove(entity.ID());
                        point.State = EPointState.Destroy;
                    }

                }
                if (moveSpeed < 1)
                {
                    // point.shakeTimeLeft -= Time.deltaTime;
                    // if (point.shakeTimeLeft < 0)
                    // {
                    //     point.shakeTimeLeft += 10;
                    // }
                    // var shakeDist = Mathf.Sin(point.shakeTimeLeft * ShakeRate) * ShakeDistance;
                    // view.localPositionShake = new Vector3(0, 0, shakeDist);
                }
                break;
            case EPointState.Destroy:
                Util.DestroyEntity(entity);
                break;
        }
    }
}