using Gameplay.Effect;
using Gameplay.Weapon;
using LTGame;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Gameplay.Bullet
{

    using UnityEngine;

    public class BulletStateDamageUnit: BaseBulletState
    {

        public BulletStateDamageUnit(ViewBullet owner): base(owner, EBulletState.DamageUnit)
        {

        }

        protected override void _OnEnter(NBaseState exitState, object param)
        {
            base._OnEnter(exitState, param);
            isFinished = true;
            nextState = EBulletState.Destroy;

            var targetUnit = owner.lockUnit;
            if (targetUnit.statusData.isDead)
            {
                // 已经死亡,就取消该子弹

                // 把命中特效播到地板上
                var effectId = owner.configData.DestroyEffectId;
                if (effectId > 0)
                {
                    EffectManager.instance.PlayEffectById(effectId, owner.rootObj.transform.position).owner = owner.sender;
                }
                return;
            }

            BulletManager.instance.AddBuffs2Unit(targetUnit, owner.sender, owner.configData);

            // 把命中特效播到目标身上
            {
                var effectId = owner.configData.DestroyEffectId;
                if (effectId > 0)
                {
                    var hitPoints = ViewWeapon.GetPoints(targetUnit);
                    var randomPoint = hitPoints.m_OtherPoints[Random.Range(0, hitPoints.m_OtherPoints.Length)];
                    var sender = owner.sender;
                    var senderPos = sender != null ? sender.transData.pos : owner.rootObj.transform.position;
                    var position = randomPoint.position;
                    var toSenderPos = senderPos - position;
                    toSenderPos.y = 0;
                    var angle = Vector3.SignedAngle(Vector3.forward, toSenderPos, Vector3.up);
                    var rot = Quaternion.Euler(0, angle, 0);
                    EffectManager.instance.PlayEffectById(effectId, position, rot).owner = owner.sender;
                }
            }
           

        }

    }
}