using Entitas;
using UnityEngine;
using Game;
public class BulletSystem : IExecuteSystem, IInitializeSystem
{
    private IGroup<GameEntity> _entities;
    public void Initialize()
    {
        _entities = Util.GetGroup(GameMatcher.Bullet);
    }
    public void Execute()
    {
        foreach (var entity in _entities)
        {
            if (Util.IsPause(entity))
            {
                continue;
            }
            UpdateBulletViewRot(entity);    // 更新子弹旋转
            // UpdateBullet(entity);
            UpdateBulletAlive(entity); //子弹销毁
        }
    }
    public void UpdateBulletAlive(GameEntity entity)
    {
        if (!entity.timeline.IsRunning)
        {
            //时间轴跑完
            Util.DestroyEntity(entity);
        }
        if (entity.move.IsAgainstWall)
        {
            //击中墙壁
            Util.DestroyEntity(entity);
        }
        if (entity.skill.SkillHitInfo.Count > 0)
        {
            //命中
            Util.DestroyEntity(entity);
        }
    }
    // public void UpdateBullet(GameEntity entity)
    // {
    //     var id = entity.iD;
    //     var bullet = entity.bullet;
    //     var cfg = id.data;
    //     var bp = cfg.blueprint;
    //     var view = entity.view;
    //     bullet.data.target = bullet.target;
    //     switch (bullet.state)
    //     {
    //         case EBpState.Enter:
    //             Util.RunBP(bp, GameConst.BP_ENTRANCE_Enter, bullet.data);
    //             bullet.state = EBpState.Update;
    //             break;
    //         case EBpState.Update:
    //             var timePast = Mathf.Min(Time.deltaTime, bullet.timeLeft);
    //             bullet.timeLeft -= timePast;
    //             if (bullet.timeLeft == 0)
    //             {
    //                 bullet.state = EBpState.Leave;
    //             }
    //             if (bullet.positionPre != Vector3.zero)
    //             {
    //                 Util.RunBP(bp, GameConst.BP_ENTRANCE_Update, bullet.data);
    //             }
    //             bullet.positionPre = entity.GetPos(); //刷新上一次位置
    //             break;
    //         case EBpState.Leave:
    //             Util.RunBP(bp, GameConst.BP_ENTRANCE_Leave, bullet.data);
    //             Util.DestroyEntity(entity);
    //             break;
    //     }
    // }
    public void UpdateBulletViewRot(GameEntity entity)
    {
        var view = entity.view;
        var dir = entity.move.MoveDir;
        if (dir.magnitude > 0)
        {
            var rot = Quaternion.FromToRotation(Vector3.right, dir);
            view.TransformView.localRotation = rot;
        }
    }
}