using System;
using System.Collections.Generic;
using UnityEngine;

namespace AI
{
    public abstract class AIBase
    {
        public List<AIBase> children = new();

        public abstract JobBase GetJob(Entity.Entity target);
    }

    public class Selector : AIBase
    {
        public override JobBase GetJob(Entity.Entity target)
        {
            foreach (var aiBase in children)
            {
                var job = aiBase.GetJob(target);
                if (job != null)
                    return job;
            }
            return null;
        }
    }
    public class ConditionalAI : Selector
    {
        // 条件函数，返回 true 表示满足条件
        private Func<Entity.Entity, bool> condition;

        // 构造函数，传入条件函数
        public ConditionalAI(Func<Entity.Entity, bool> conditionFunc)
        {
            condition = conditionFunc;
        }

        public override JobBase GetJob(Entity.Entity target)
        {
            // 检查条件是否满足
            if (condition != null && condition(target))
            {
                // 如果条件满足，继续查找子节点的任务
                return base.GetJob(target);
            }

            // 条件不满足，直接返回 null
            return null;
        }
    }
    public class SequentialAI : Selector
    {
        private int currentIndex = 0; // 当前正在尝试的子节点索引

        public override JobBase GetJob(Entity.Entity target)
        {
            // 如果当前索引超出了子节点范围，重置索引并返回 null
            if (currentIndex >= children.Count)
            {
                ResetIndex();
                return null;
            }

            // 获取当前子节点的任务
            var currentChild = children[currentIndex];
            var job = currentChild.GetJob(target);

            // 移动到下一个子节点
            currentIndex++;

            return job;
        }

        // 重置当前索引（用于重新开始遍历）
        private void ResetIndex()
        {
            currentIndex = 0;
        }
    }
    public class ContinuousMove : AIBase
    {
        public override JobBase GetJob(Entity.Entity target)
        {
            return new MoveJob();
        }
    }

    public class TrackPlayer : AIBase
    {
        public override JobBase GetJob(Entity.Entity target)
        {
            throw new NotImplementedException();
        }
    }
    public class RandomWander : AIBase
    {
        public override JobBase GetJob(Entity.Entity target)
        {
            return new WanderJob();
        }
    }

}