using System.Collections.Generic;

namespace BaseGames.AI
{
    /// <summary>
    /// 不可变状态图，每敌人类型构建一次、所有实例共享（flyweight）。
    /// 既被 AiRuntime 执行，又被导出器/调试器只读投影。
    /// </summary>
    public sealed class AiGraph
    {
        readonly Dictionary<string, AiState> _states;
        public string EntryState { get; }
        public IReadOnlyList<Transition> GlobalTransitions { get; }

        public AiGraph(string entry, Dictionary<string, AiState> states, IReadOnlyList<Transition> globals)
        {
            EntryState = entry;
            _states = states;
            GlobalTransitions = globals;
        }

        public AiState GetState(string name) => _states[name];
        public bool HasState(string name) => _states.ContainsKey(name);
        public IEnumerable<string> StateNames => _states.Keys;
        public IEnumerable<AiState> States => _states.Values;
    }
}