using ET.EventType;
using System;
using System.Collections.Generic;

namespace ET
{
    public class MapSceneAwakeSystem: AwakeSystem<MapScene>
    {
        public override void Awake(MapScene self)
        {
            self.Init();
            self.UnitDic.Clear();
        }
    }

    public static class MapSceneSystem
    {
        private const int Max_Tier_Count_Per_Map = 20;

        public static void Init(this MapScene self)
        {
            self.tierDic.Clear();
            for (int i = 1; i <= Max_Tier_Count_Per_Map; i++)
            {
                //!Tier 没有其他逻辑
                self.tierDic.Add(i, new Tier());
            }
        }

        public static Tier GetTier(this MapScene self, int tierId)
        {
            self.tierDic.TryGetValue(tierId, out Tier tier);
            return tier;
        }

        public static void AddUnit(this MapScene self, Unit unit)
        {
            try
            {
                MapUnitComponent.Instance.Add(unit);
                self.UnitDic[unit.Id] = unit;
                unit.Parent = self;
            }
            catch (Exception e)
            {
                Log.Error(e);
            }
        }

        public static bool RemoveUnit(this MapScene self, Unit unit)
        {
            MapUnitComponent.Instance.Remove(unit.Id);
            return self.UnitDic.Remove(unit.Id);
        }

        public static async ETTask Enter(this MapScene self, Unit unit, bool isReEnter = false)
        {
            if (unit.UnitType != UnitType.Player)
            {
                self.AddUnit(unit);
                return;
            }

            Game.EventSystem.Publish(new ET.EventType.OnEnterMap { unit = unit }).Coroutine();
            UnitScene unitScene = unit.GetComponent<UnitScene>();
            int tierId = 0;

            Tier tier = null;
            if (!isReEnter)
            {
                bool isEnter = false;
                do
                {
                    tierId++;
                    tier = self.GetTier(tierId);
                    if (tier == null)
                    {
                        break;
                    }

                    if (tier.CanAdd()) isEnter = true;
                }
                while (!isEnter);

                unitScene.TierId = tierId;
            }

            using (var listComponent = ListComponent<Unit>.Create())
            {
                IEnumerable<Unit> unitList = self.GetTierAll(tierId);
                if (unitList != null)
                    listComponent.List.AddRange(unitList);

                //广播
                foreach (Unit u in listComponent.List)
                {
                    try
                    {
                        if (!u)
                            continue;
                        BrocastMessage(unit, u).Coroutine();
                    }
                    catch (Exception e)
                    {
                        Log.Error(e);
                    }
                }

                static async ETVoid BrocastMessage(Unit enterUnit, Unit targetUnit)
                {
                    M2C_EnterMap m2C_EnterMap = new M2C_EnterMap { UnitInfo = new UnitPosInfo(), };
                    //!加入到其他玩家的aoi列表
                    targetUnit.GetComponent<BrocastComponent>()?.Add(enterUnit);
                    //!其他玩家加入到刚进入的aoi列表
                    enterUnit.GetComponent<BrocastComponent>()?.Add(targetUnit);

                    UnitHelper.SetUnitInfo(enterUnit, m2C_EnterMap.UnitInfo);
                    m2C_EnterMap.PvpUnitCharacter = await CharacterHelper.GetUnitCharacter(enterUnit);
                    MessageHelper.SendActor(targetUnit, m2C_EnterMap);
                }

                //发送场景中已有的玩家
                M2C_UnitsInMap unitsInMap = new M2C_UnitsInMap();
                using (var taskList = ListComponent<ETTask>.Create())
                {
                    foreach (Unit u in listComponent.List)
                    {
                        try
                        {
                            if (!u)
                                continue;

                            taskList.List.Add(GetUnitInfo(u, unitsInMap));
                        }
                        catch (Exception e)
                        {
                            Log.Error(e);
                        }
                    }

                    static async ETTask GetUnitInfo(Unit u, M2C_UnitsInMap unitsInMap)
                    {
                        UnitPosInfo unitInfo = new UnitPosInfo();
                        UnitHelper.SetUnitInfo(u, unitInfo);
                        unitsInMap.Units.Add(unitInfo);
                        unitsInMap.PvpUnits.Add(await CharacterHelper.GetUnitCharacter(u));
                    }

                    await ETTaskHelper.WaitAll(taskList.List);
                    MessageHelper.SendActor(unit, unitsInMap);
                }

                if (!isReEnter)
                    BattleHelper.UpdateChangeMapTaskStateEvent(unitScene, listComponent.List);
            }

            if (!isReEnter)
            {
                if (tier != null)
                    tier.Add(unit);
                self.AddUnit(unit);
            }
            // if (AppConfig.inst.isTest)
            //     Log.Debug($"【进入】{unit.ToCustomString()}进入地图[{self.mapId / 100}][{self.mapId % 100}]的{tierId}线,当前线玩家：{unitList.ToCustomString()}");

            //!触发通关任务事件
            Game.EventSystem.Publish(new ET.EventType.AfterChangeMap { unit = unit, mapId = self.mapId }).Coroutine();
        }

        public static IEnumerable<Unit> GetAll(this MapScene self)
        {
            return self.UnitDic.Values;
        }

        public static IEnumerable<Unit> GetTierAll(this MapScene self, int tierId)
        {
            if (self.GetTier(tierId) is { } tier)
            {
                return tier.GetAll();
            }

            return null;
        }

        public static bool ChangeTier(this MapScene self, Unit unit, int tierId)
        {
            UnitScene unitScene = unit.GetComponent<UnitScene>();
            if (self.GetTier(tierId) is { } tier)
            {
                if (tier.CanAdd())
                {
                    tier.Add(unit);
                    self.GetTier(unitScene.TierId).Remove(unit.Id);
                    return true;
                }
            }

            return false;
        }

        public static void Leave(this MapScene self, Unit unit, bool isOffLine = false)
        {
            if (unit.UnitType != UnitType.Player)
            {
                self.RemoveUnit(unit);
                return;
            }

            if (!self.RemoveUnit(unit))
            {
                return;
            }

            try
            {
                UnitScene unitScene = unit.GetComponent<UnitScene>();
                int tierId = unitScene.TierId;
                self.GetTier(tierId).Remove(unit.Id);
                IEnumerable<Unit> unitList = self.GetTierAll(tierId);
                // if (AppConfig.inst.isTest)
                //     Log.Debug($"【离开】{unit.ToCustomString()}离开地图[{self.mapId / 100}][{self.mapId % 100}]的{tierId}线,剩余线玩家：{unitList.ToCustomString()}");
                //广播
                using var listComponent = ListComponent<Unit>.Create();
                listComponent.List.AddRange(unitList);
                foreach (Unit u in listComponent.List)
                {
                    try
                    {
                        if (!u)
                            continue;
                        //!离开其他玩家的aoi列表
                        u.GetComponent<BrocastComponent>()?.Remove(unit.Id);
                        //!其他玩家离开的aoi列表
                        unit.GetComponent<BrocastComponent>()?.Remove(u.Id);
                        MessageHelper.SendActor(u, new M2C_LeaveMap() { UnitId = unit.Id });
                    }
                    catch (Exception e)
                    {
                        Log.Error(e);
                    }
                }
            }
            catch (Exception e)
            {
                Log.Error(e);
            }
        }
    }
}