using System;
using UnityEngine;

namespace BaseGames.Enemies
{
    /// <summary>
    /// 受击分级配置（KnockUp 击飞门槛 & 飞行参数）。
    /// 挂载在 EnemyStatsSO.HitTiers 中。
    /// </summary>
    [Serializable]
    public struct HitTierConfig
    {
        [Tooltip("击飞（KnockUp）触发伤害阈值；需同时设置 DamageFlags.Launch；0 = 仅依赖 Launch 标志")]
        [Min(0)] public int launchThreshold;
        [Tooltip("击飞纵向冲量")]
        [Min(0f)] public float launchUpForce;
        [Tooltip("击飞横向冲量（沿受击反方向）")]
        [Min(0f)] public float launchHorzForce;
        [Tooltip("无 KnockUp 动画时的状态持续时长（s）")]
        [Min(0f)] public float knockUpDuration;
    }

    /// <summary>
    /// 敌人属性配置 SO（架构 07_EnemyModule §2）。
    /// </summary>
    [CreateAssetMenu(menuName = "BaseGames/Enemies/EnemyStats")]
    public class EnemyStatsSO : ScriptableObject
    {
        [Header("生命")]
        [Min(1)] public int MaxHP = 50;

        [Header("防御")]
        [Min(0)] public int Defense = 0;

        [Header("移动")]
        [Min(0f)] public float WalkSpeed  = 2f;
        [Min(0f)] public float RunSpeed   = 4f;

        [Header("战斗")]
        [Min(0f)] public float AttackCooldown  = 1f;

        [Header("攻击选招策略")]
        [Tooltip("到攻击范围内如何从多个候选招里选一个")]
        public BaseGames.Enemies.Abilities.AttackSelectionMode attackSelectionMode
            = BaseGames.Enemies.Abilities.AttackSelectionMode.WeightedRandom;

        [Tooltip("WeightedRandomAntiRepeat 模式下，上一次选中的招的权重折扣系数。" +
                 "0 = 有替代招时绝不连续重复；1 = 不惩罚。仅该模式生效")]
        [Range(0f, 1f)] public float attackAntiRepeatFactor
            = BaseGames.Enemies.Abilities.EnemyAttackSelector.DefaultAntiRepeatFactor;

        [Header("追击 & AI 阶段")]
        [Tooltip("是否有警觉状态：勾选=未发现态进入视野先进警觉(朝向+警觉动画)再追击；不勾选=进入追逐感知直接追击")]
        public bool HasAlertState = true;
        [Tooltip("最大追击距离（m）；超出后放弃追击切换搜查阶段")]
        [Min(0f)] public float MaxChaseDistance    = 15f;
        [Tooltip("视线丢失判定超时（s）；超过此时长无视线则切换搜查")]
        [Min(0f)] public float LoseLinkTimeout     = 2f;
        [Tooltip("归位到达判定半径（m）")]
        [Min(0.01f)] public float HomeRadius          = 0.5f;

        [Header("受击分级")]
        [Tooltip("Stagger / KnockUp 伤害阈值及击飞参数")]
        public HitTierConfig HitTiers;
    }
}