using System;
using System.Collections.Generic;

namespace BaseGames.AI
{
    /// <summary>一个状态：进入/每帧/退出钩子 + 出边转换列表（按优先级有序，首个命中即转）。</summary>
    public sealed class AiState
    {
        readonly List<Transition> _transitions = new List<Transition>();

        public string Name { get; }
        public Action<IAiContext> OnEnter { get; internal set; }
        public Action<IAiContext, float> OnTick { get; internal set; } // (ctx, dt)
        public Action<IAiContext> OnExit { get; internal set; }
        public IReadOnlyList<Transition> Transitions => _transitions;

        /// <summary>
        /// 是否为终态：进入后不再离开是设计意图，而非漏挂出边。
        /// 由 <see cref="BrainBuilder.StateBuilder.Terminal"/> 标记，供 Build() 的死角校验放行。
        /// </summary>
        public bool IsTerminal { get; internal set; }

        internal void AddTransition(Transition t) => _transitions.Add(t);

        public AiState(string name) => Name = name;
    }
}