using System;
using JNGame.Math;
using JNGame.Sync.System;
using Plugins.JNGame.Util;

namespace JNGame.Sync.Frame.Service
{
    /// <summary>
    /// 随机数
    /// </summary>
    public class JNRandomSystem : SLogicSystem
    {

        //随机数
        private Func<LFloat,LFloat,LFloat> nRandomFloat;
        private Func<int,int,int> nRandomInt;
        
        //Id
        private long _id = 0;
        private long _idMin = long.MinValue;
        private long _idMax = long.MaxValue;

        public JNRandomSystem(int seed)
        {
            nRandomFloat = RandomUtil.SyncRandomFloat(seed);
            nRandomInt = RandomUtil.SyncRandomInt(seed);
        }

        public LFloat Float()
        {
            return Float(0,1);
        }

        public LFloat Float(LFloat min,LFloat max)
        {
            return nRandomFloat(min,max);
        }

        public int Int(int max,int min)
        {
            return nRandomInt(max,min);
        }

        public long NextId()
        {
            return ++_id;
        }

        public void SetIdValue(long min,long max)
        {
            if (_id < min)
            {
                _id = min;
            }
            _idMin = min;
            _idMax = max;
        }

        /// <summary>
        /// 适配Id 用于 历史Id和新Id重复问题
        /// </summary>
        /// <param name="id"></param>
        /// <exception cref="NotImplementedException"></exception>
        public void AdaptId(long id)
        {
            if (_idMin <= id && id >= _idMax)
            {
                if (id > _id)
                {
                    _id = id;
                }
            }
        }
    }
}