using System;
using System.Collections.Generic;
using System.RandomPool;
using FJson;
using Framework.Save;
// using Framework.Save;
using Game.Data;
using UnityEngine;

namespace Game
{
    /// <summary>
    /// 稀有度随机
    /// </summary>
    public class LevelRandom
    {
        private LiteDictionary<int, int> _levelDic;
        private Dictionary<int, int>     _weightDic;
        private int                      _weightSum;

        public LevelRandom (Dictionary<int, int> levelDic, IList<int> commonRandomGroups)
        {
            this._weightDic = new Dictionary<int, int>();
            this._levelDic  = new LiteDictionary<int, int>();
            
            foreach (var randomGroup in commonRandomGroups)
            {
                if (levelDic.TryGetValue (randomGroup , out var value))
                {
                    this._levelDic[randomGroup] = value;
                }
            }
            
            this.RefreshWeight();
        }

        /// <summary>
        /// 刷新总权重
        /// </summary>
        private void RefreshWeight()
        {
            this._weightDic.Clear();
            this._weightSum = 0;
            foreach (var dicKey in this._levelDic.Keys)
            {
                this._weightSum         += this._levelDic[dicKey];
                this._weightDic[dicKey] =  this._weightSum;
            }
        }
        
        
        /// <summary>
        ///  设置指定等级的中奖比重
        /// </summary>
        /// <param name="quality"></param>
        /// <param name="weight"></param>
        public void SetWeight(int quality, int weight)
        {
            this._levelDic[quality] = weight;
            this.RefreshWeight();
        }

        public int RandomItemLevel(int seedId)
        {
            var d     = RandomUtils.RandomFloat ();
            var level = 0;
            foreach (var dicKey in this._weightDic.Keys)
            {
                var value = this._weightDic[dicKey];
                if (d <= value * 1f / this._weightSum)
                {
                    level = dicKey;
                    break;
                }
            }
            return level;
        }

        public int RandomItemLevel(int seedId , List<int> maskLevel)
        {
            var level = 0;
            if (maskLevel == null || maskLevel.Count == 0)
                return this.RandomItemLevel(seedId);
            Dictionary<int, int> tempWeightList = new Dictionary<int, int>();
            int                          tempWeightSum  = 0;
            foreach (var itemLevel in this._levelDic.Keys)
            {
                if (maskLevel.Contains(itemLevel))
                    continue;
                tempWeightSum += this._levelDic[itemLevel];
                tempWeightList[itemLevel] = tempWeightSum;
            }

            if (tempWeightSum != 0)
            {
                var d = RandomUtils.RandomFloat () * tempWeightSum;
                foreach (var dicKey in tempWeightList.Keys)
                {
                    var value = tempWeightList[dicKey];
                    if (d <= value)
                    {
                        level = dicKey;
                        break;
                    }
                }
            }
            return level;
        }
        
    }
}