using System.Collections.Generic;

namespace Bro.Common.FSM
{
    // 状态处理代理定义
    public delegate void StatHandler();


    public class SimpleFSM
    {
        // 状态机描述
        public string   Desp { get;set; }

        // 当前状态
        private int     curStat { get;set;}

        // 状态动作表
        private Dictionary<int, StatHandler> statTbl = new Dictionary<int,StatHandler>();

        public SimpleFSM()
        {
        
        }

        /// <summary>
        /// 注册状态处理
        /// </summary>
        /// <param name="stat"></param>
        /// <param name="handle"></param>
        /// <returns></returns>
        public bool Regist(int stat, StatHandler handle)
        {
            if ( null == handle || statTbl.ContainsKey(stat) )
            {
                return false;
            }

            statTbl.Add(stat, handle);

            return true;
        }

        /// <summary>
        /// 注册状态处理表
        /// </summary>
        /// <param name="statTbl"></param>
        /// <returns></returns>
        public bool Regist(Dictionary<int, StatHandler> statTbl)
        {
            this.statTbl = statTbl;

            return true;
        }

        /// <summary>
        /// 设置当前状态
        /// </summary>
        /// <param name="stat"></param>
        public void SetStat(int stat)
        {
            this.curStat = stat;
        }

        /// <summary>
        /// 获取当前状态
        /// </summary>
        /// <returns></returns>
        public int GetStat()
        {
            return curStat;
        }

        /// <summary>
        /// 状态基运行
        /// </summary>
        public void Run()
        {
            for (; ; )
            {
                foreach (var item in statTbl)
                {
                    StatHandler handle = item.Value;
                    if (null == handle)
                    {
                        continue;
                    }

                    if (curStat == item.Key)
                    {
                        handle();
                        break;
                    }
                }
            }

        }
    }
}