using System;
using UnityEngine;

namespace BaseGames.Enemies.Abilities
{
    /// <summary>
    /// 能力引用。配方资产侧引用 EnemyAbilitySO（Unity 引用系统保证拼不错、改名不断链）；
    /// 定制 AiScript 侧仍可直接写字符串 id。资产优先。
    /// </summary>
    [Serializable]
    public struct AbilityRef
    {
        [Tooltip("能力配置资产；配方路径用这个")]
        [SerializeField] EnemyAbilitySO _asset;

        [NonSerialized] string _literal;   // 定制脚本路径用；不参与序列化

        /// <summary>引用的能力资产；走字符串路径时为 null。供校验器读取冷却等配置。</summary>
        public EnemyAbilitySO Asset => _asset;

        public AbilityRef(EnemyAbilitySO asset)              { _asset = asset; _literal = null; }
        public AbilityRef(string id)                         { _asset = null;  _literal = id; }
        public AbilityRef(EnemyAbilitySO asset, string id)   { _asset = asset; _literal = id; }

        /// <summary>解析出的能力 id；资产优先，都没有则 null。</summary>
        public string Id => _asset != null ? _asset.abilityId : _literal;

        public bool IsEmpty => string.IsNullOrEmpty(Id);

        /// <summary>资产与字符串同时非空——歧义配置，供校验器报警告。</summary>
        public bool HasConflict => _asset != null && !string.IsNullOrEmpty(_literal);

        public static implicit operator AbilityRef(string id) => new AbilityRef(id);
        public static implicit operator AbilityRef(EnemyAbilitySO asset) => new AbilityRef(asset);
    }
}