using System.Collections.Generic;
using System;

/**
 * PVE（无尽模式）怪物配置数据表处理类
 * @Author: chenxin
 * @Date: 2020-10-12 12:13:44
 */
namespace KTGMGemClient
{
    public class EndlessEnemyData
    {
        /// <summary>
        /// 无尽模式怪物配置表
        /// </summary>
        private static List<endless_enemy> endlessEnemyList;

        /// <summary>
        /// 根据怪物类型来分类一下数据
        /// </summary>
        private static Dictionary<int, List<endless_enemy>> typeDic;

        private static Random random;

        public static void Init()
        {
            endlessEnemyList = JsonDataCenter.GetList<endless_enemy>();
            typeDic = new Dictionary<int, List<endless_enemy>>();
            random = new Random();

            foreach (endless_enemy data in endlessEnemyList)
            {
                if (!typeDic.ContainsKey(data.type))
                    typeDic.Add(data.type, new List<endless_enemy>());

                typeDic[data.type].Add(data);
            }
        }

        /// <summary>
        /// 根据怪物id获取怪物数据
        /// </summary>
        /// <param name="id">id > 0：获取指定id的小怪，
        /// id = -1：从类型为1（小怪）随机，
        /// id = -2：从类型为2（精英怪）随机
        /// id = -3：从所有小怪中随机</param>
        /// <returns></returns>
        public static endless_enemy GetDataById(int id)
        {
            if (id > 0)
            {
                foreach (endless_enemy data in endlessEnemyList)
                {
                    if (data.id == id)
                        return data;
                }

                return null;
            }

            List<endless_enemy> list = endlessEnemyList;

            if (id == -1 || id == -2)
                list = typeDic[-id];

            if (list.Count == 0)
                throw new ArgumentException("id 不规范 or 没有对应的怪物数据");

            int index = random.Next(list.Count);

            return list[index];
        }
    }
}