using System;
using System.Collections.Generic;
using System.Linq;

namespace ET.Server
{
    [FriendOf(typeof (MapRankComponent))]
    [FriendOfAttribute(typeof (Map))]
    public static class MapRankComponentSystem
    {
        public class MapRankComponentAwakeSystem: AwakeSystem<MapRankComponent>
        {
            protected override void Awake(MapRankComponent self)
            {
                Log.Info($"创建场景贡献榜组件");
            }
        }

        public class MapRankComponentDestroySystem: DestroySystem<MapRankComponent>
        {
            protected override void Destroy(MapRankComponent self)
            {
                Log.Info($"销毁场景贡献榜组件");
            }
        }

        public class MapRankComponentUpdateSystem: UpdateSystem<MapRankComponent>
        {
            protected override void Update(MapRankComponent self)
            {
                // 未死亡的单位玩家,每秒增加贡献值
                self.AddContributeValue();

                // 每隔3秒推送排名
                long now = TimeHelper.ClientNow();
                if (now >= self.NextPushTime)
                {
                    // 排序并推送客户端
                    self.Sort();
                    // 设置下一次推送时间戳
                    self.NextPushTime = now + 3000;
                }
            }
        }

        /// <summary>
        /// 增加贡献值数据
        /// </summary>
        /// <param name="self"></param>
        private static void AddContributeValue(this MapRankComponent self)
        {
            Map map = self.GetParent<Map>();

            foreach (Struct.UnitPlayerData unitPlayer in map.UnitPlayers.Values)
            {
                if (unitPlayer.DeadState == 1)
                {
                    continue;
                }

                int value = unitPlayer.Level switch
                {
                    1 => 1,
                    2 => 2,
                    3 => 3,
                    _ => 0
                };

                map.AddContributeValue(unitPlayer.OpenId, value);
            }
        }

        /// <summary>
        /// 排序
        /// </summary>
        /// <param name="self"></param>
        private static void Sort(this MapRankComponent self)
        {
            Map map = self.GetParent<Map>();

            List<Struct.UnitPlayerData> list = map.UnitPlayers.Values.Where(unitPlayer => unitPlayer != null).ToList();

            if (list is { Count: > 0 })
            {
                list.Sort((r1, r2) => r2.ContributeValue.CompareTo(r1.ContributeValue));
            }

            int ranking = 1;

            List<RankInfo> infoListProto = new List<RankInfo>();

            foreach (Struct.UnitPlayerData unitPlayerData in list.TakeWhile(unitPlayerData => ranking <= 3))
            {
                RankInfo info = new RankInfo();
                info.Name = unitPlayerData.Name;
                // info.Url = unitPlayerData.Url;
                info.Value = unitPlayerData.ContributeValue;
                info.Ranking = ranking;
                infoListProto.Add(info);

                ranking += 1;
            }

            bool isEqual = self.IsEqual(infoListProto);
            if (isEqual)
            {
                return;
            }

            // 推送客户端
            if (map.Player != null)
            {
                MessageHelper.SendToClient(map.Player, new G2C_RankNotify() { InfoList = infoListProto });
                // 记录一下推送列表
                self.LastInfoListProto = infoListProto;
            }
        }

        private static bool IsEqual(this MapRankComponent self, List<RankInfo> infoList)
        {
            if (self.LastInfoListProto.Count != infoList.Count)
            {
                return false;
            }

            for (int i = 0; i < infoList.Count; i++)
            {
                RankInfo info1 = infoList[i];
                RankInfo info2 = self.LastInfoListProto[i];
                if (info1 != null && info2 != null && (!info1.Name.Trim().Equals(info2.Name.Trim()) || info1.Ranking != info2.Ranking))
                {
                    return false;
                }
            }

            return true;
        }

        /// <summary>
        /// 游戏结束
        /// </summary>
        /// <param name="self"></param>
        public static void OnGameOver(this MapRankComponent self)
        {
            Map map = self.GetParent<Map>();

            List<Struct.UnitPlayerData> list = map.UnitPlayers.Values.Where(unitPlayer => unitPlayer != null).ToList();

            if (list is { Count: > 0 })
            {
                list.Sort((r1, r2) => r2.ContributeValue.CompareTo(r1.ContributeValue));
            }

            int ranking = 1;

            List<RankInfo> infoListProto = new List<RankInfo>();

            foreach (Struct.UnitPlayerData unitPlayerData in list.TakeWhile(unitPlayerData => ranking <= 50))
            {
                RankInfo info = new RankInfo();
                info.Name = unitPlayerData.Name;
                // info.Url = unitPlayerData.Url;
                info.Value = unitPlayerData.ContributeValue;
                info.Ranking = ranking;
                infoListProto.Add(info);

                ranking += 1;
            }

            // 推送客户端
            if (map.Player != null)
            {
                MessageHelper.SendToClient(map.Player, new G2C_RankNotify() { InfoList = infoListProto });
            }
        }
    }
}