Gen_Hack-and-Slash-Roguelite/Client/Assets/Scripts/AI/JobBase.cs

using Data;
using Managers;
using UnityEngine;

namespace AI
{
    public abstract class JobBase
    {
        public Entity.Entity entity;
        protected int timeoutTicks = 300;
        public bool Running => timeoutTicks > 0;

        protected abstract void UpdateJob();


        public virtual void StartJob(Entity.Entity target)
        {
            entity = target;
        }

        public bool Update()
        {
            if (!Running)
                return false;
            UpdateJob();
            timeoutTicks--;
            return true;
        }

        public virtual void StopJob()
        {
            timeoutTicks = 0;
        }
    }

    public class WanderJob : JobBase
    {
        public override void StartJob(Entity.Entity target)
        {
            base.StartJob(target);
            Vector3 move = new(Random.Range(-10, 10), Random.Range(-10, 10));
            var targetPosition = entity.transform.position + move;
            entity.SetTarget(targetPosition);
            entity.IsChase = false;
        }

        protected override void UpdateJob()
        {
            entity.TryMove();
        }

        override public void StopJob()
        {
            base.StopJob();
            entity.IsChase = true;
        }

    }

    public class IdleJob : JobBase
    {
        override public void StartJob(Entity.Entity target)
        {
            base.StartJob(target);
            timeoutTicks = 500;
        }

        protected override void UpdateJob()
        {
        }
    }

    public class MoveJob : JobBase
    {
        protected override void UpdateJob()
        {
            entity.TryMove();
        }
    }

    public class AttackJob : JobBase
    {
        private Entity.Entity attackTarget;

        // StartJob 方法：用于初始化任务，寻找初始攻击目标
        override public void StartJob(Entity.Entity performerEntityContext) // 参数名更明确，通常是发起任务的实体
        {
            base.StartJob(performerEntityContext);
            // 1. 任务执行者自身有效性检查
            if (entity == null)
            {
                StopJob(); // 调用StopJob来结束任务
                return;
            }

            attackTarget = FindNewHostileTarget();

            if (attackTarget == null)
            {
                StopJob(); // 调用StopJob来结束任务
            }
        }

        protected override void UpdateJob()
        {
            // 1. 任务执行者的基本检查
            if (entity == null || entity.IsDead)
            {
                StopJob();
                return;
            }

            if (attackTarget == null || attackTarget.IsDead)
            {
                attackTarget = FindNewHostileTarget(); // 尝试寻找新的攻击目标
                if (attackTarget == null)
                {
                    StopJob();
                    return;
                }
            }

            var weapon = entity.GetCurrentWeapon();
            var attackRange = 0f;
            if (weapon != null)
            {
                attackRange = weapon.Attributes.attackRange;
            }

            var distanceSq = (entity.Position - attackTarget.Position).sqrMagnitude;
            var effectiveAttackRangeSq = attackRange * attackRange; // 将攻击范围也平方

            entity.SetTarget(attackTarget.Position);

            if (weapon != null && distanceSq <= effectiveAttackRangeSq)
            {
                entity.TryAttack();

            }
            else
            {
                entity.TryMove();
            }
        }

        /// <summary>
        /// 查找执行实体最近的敌对目标。
        /// </summary>
        /// <returns>找到的敌对实体，如果没有则返回null。</returns>
        private Entity.Entity FindNewHostileTarget()
        {
            if (!entity) return null;
            return EntityManage.Instance.FindNearestEntityByRelation(
                entity.currentDimensionId, // 搜索维度ID
                entity.entityPrefab, // 执行实体的Prefab ID，用于关系判断
                Relation.Hostile)?.entity; // 寻找敌对关系的目标
        }
    }

    public class AdvancedAttackJob : JobBase
    {
        private Entity.Entity attackTarget;

        // 常量：用于配置远程AI行为的风筝参数
        private const float KITING_THRESHOLD_MULTIPLIER = 0.5f; // 当目标距离小于 (攻击范围 * 此乘数) 时，远程单位开始尝试远离

        private const float KITING_BUFFER_DISTANCE = 5.0f; // 当远程单位远离时，目标点会是当前位置向反方向偏移此距离

        // StartJob 方法：用于初始化任务，寻找初始攻击目标
        override public void StartJob(Entity.Entity performerEntityContext)
        {
            base.StartJob(performerEntityContext);
            if (entity == null)
            {
                StopJob();
                return;
            }

            attackTarget = FindNewHostileTarget();
            if (attackTarget == null)
            {
                StopJob();
            }
        }

        protected override void UpdateJob()
        {
            // 1. 任务执行者的基本检查
            if (entity == null || entity.IsDead)
            {
                StopJob();
                return;
            }

            // 2. 攻击目标检查
            if (attackTarget == null || attackTarget.IsDead)
            {
                attackTarget = FindNewHostileTarget(); // 尝试寻找新的攻击目标
                if (attackTarget == null)
                {
                    StopJob();
                    return;
                }
            }

            // 获取武器和其属性
            var weapon = entity.GetCurrentWeapon();
            var attackRange = 0f;
            var isRangedWeapon = false; // 标识是否为远程武器
            if (weapon != null)
            {
                if (weapon.Attributes != null)
                {
                    attackRange = weapon.Attributes.attackRange;
                }

                // 使用 WeaponType 来判断武器类型，更明确
                isRangedWeapon = weapon.Type == WeaponType.Ranged;
            }

            var distanceSq = (entity.Position - attackTarget.Position).sqrMagnitude;
            var effectiveAttackRangeSq = attackRange * attackRange; // 将攻击范围平方
            // ---- 核心AI行为决策 ( AdvancedAttackJob 的智能之处) ----
            if (isRangedWeapon)
            {
                // 远程单位的风筝（Kiting）逻辑
                var kitingDistance = attackRange * KITING_THRESHOLD_MULTIPLIER;
                var kitingThresholdSq = kitingDistance * kitingDistance; // 过近距离的平方
                // 1. 如果目标过于接近 (小于风筝阈值)，尝试远离
                if (distanceSq < kitingThresholdSq)
                {
                    // 计算一个远离目标的点作为移动目标
                    var directionAway = (entity.Position - attackTarget.Position).normalized;
                    var fleePosition = entity.Position + directionAway * KITING_BUFFER_DISTANCE;
                    entity.SetTarget(fleePosition); // 设置远离点为新的移动目标
                    entity.TryMove(); // 优先执行移动操作以拉开距离
                    // 在此状态下不进行攻击，专注于 reposition
                }
                // 2. 如果目标在最佳攻击范围内 (即在风筝阈值和有效攻击范围之间)，则停止移动并攻击
                else if (distanceSq <= effectiveAttackRangeSq)
                {
                    entity.SetTarget(entity.Position); // 设定目标为当前位置，使其停止移动，专注于攻击
                    entity.TryAttack();
                }
                // 3. 如果目标太远 (超出有效攻击范围)，则移动靠近目标
                else
                {
                    entity.SetTarget(attackTarget.Position); // 设置目标位置为移动目标
                    entity.TryMove();
                }
            }
            else // 近战单位或没有武器的单位
            {
                entity.SetTarget(attackTarget.Position);
                if (weapon != null && distanceSq <= effectiveAttackRangeSq)
                {
                    entity.TryAttack();
                }
                else
                {
                    entity.TryMove();
                }
            }
        }

        /// <summary>
        /// 查找执行实体最近的敌对目标。
        /// </summary>
        /// <returns>找到的敌对实体，如果没有则返回null。</returns>
        private Entity.Entity FindNewHostileTarget()
        {
            if (!entity) return null;
            return EntityManage.Instance.FindNearestEntityByRelation(
                entity.currentDimensionId,
                entity.entityPrefab,
                Relation.Hostile)?.entity;
        }
    }

}