using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


using ServerCore; using ServerBase;
using ServerCommon;


using SESSION_ID = System.Int32;
using META_ID = System.UInt32;
using ENTITY_GUID = System.String;
using ACCOUNT_ID = System.String;
using OWNER_GUID = System.String;
using USER_GUID = System.String;
using CHARACTER_GUID = System.String;
using NPC_UNIQUE_ID = System.String;
using UGC_NPC_META_GUID = System.String;
using ITEM_GUID = System.String;
using ENTITY_INSTANCE_GUID = System.String;


namespace GameServer
{
    public static class NpcHelper
    {
        public static async Task<(Result, EntityBase?, EntityBase?)> findNpc(EntityType targetNpcType, NPC_UNIQUE_ID npcUniqueId, USER_GUID ownerGuid)
        {
            var result = new Result();
            var err_msg = string.Empty;

            switch(targetNpcType)
            {
                case EntityType.UgcNpc:
                case EntityType.Beacon:
                    (result, var found_ugc_npc, var found_master) = await findUgcNpc(npcUniqueId, ownerGuid);
                    if(result.isSuccess())
                    {
                        return (result, found_ugc_npc, found_master);
                    }
                    break;
  
                default:
                    err_msg = $"Invalid EntityType of Npc !!! : targetNpcType:{targetNpcType}, npcUniqueId:{npcUniqueId}, ownerGuid:{ownerGuid}";
                    result.setFail(ServerErrorCode.EntityTypeInvalid, err_msg);
                    Log.getLogger().error(result.toBasicString());
                    break;
            }

            return (result, null, null);
        }

        public static async Task<(Result, UgcNpc?, Player?)> findUgcNpc(NPC_UNIQUE_ID npcUniqueId, USER_GUID ownerGuid)
        {
            var result = new Result();
            var err_msg = string.Empty;

            var server_logic = GameServerApp.getServerLogic();
            NullReferenceCheckHelper.throwIfNull(server_logic, () => $"server_logic is null !!! : npcUniqueId:{npcUniqueId}, ownerGuid:{ownerGuid}");
            var player_manager = server_logic.getPlayerManager();
            NullReferenceCheckHelper.throwIfNull(player_manager, () => $"player_manager is null !!! : npcUniqueId:{npcUniqueId}, ownerGuid:{ownerGuid}");

            UgcNpc? found_ugc_npc = null;

            // 플레이어가 접속 상태인지 조회 한다. !!!
            if(true == player_manager.tryGetUserByPrimaryKey(ownerGuid, out var found_player))
            {
                var player_action = found_player.getEntityAction<PlayerAction>();
                NullReferenceCheckHelper.throwIfNull(player_action, () => $"player_action is null !!! : npcUniqueId:{npcUniqueId}, ownerGuid:{ownerGuid}");

                found_ugc_npc = player_action.findUgcNpc(npcUniqueId);
                
                return (result, found_ugc_npc, found_player);
            }

            if(null == found_ugc_npc)
            {
                // 채널 및 던전에 있는지 조회 한다. !!!
                found_ugc_npc = server_logic.findUgcNpcInGameZone(npcUniqueId);
                if(null != found_ugc_npc)
                {
                    return (result, found_ugc_npc, found_player);
                }
            }

            err_msg = $"Not found UgcNpc !!! : npcUniqueId:{npcUniqueId}, ownerGuid:{ownerGuid}";
            result.setFail(ServerErrorCode.UgcNpcNotFound, err_msg);
            Log.getLogger().error(result.toBasicString());

            return await Task.FromResult<(Result, UgcNpc?, Player?)>((result, null, null));
        }

        public static UgcNpc? findUgcNpcInGameZone(this GameServerLogic gameServerLogic, UGC_NPC_META_GUID ugcNpcMetaGuid)
        {
            if(gameServerLogic.getServerType().toServerType() == ServerType.Channel)
            {
                return gameServerLogic.getMap().findUgcNpc(ugcNpcMetaGuid);
            }
            else
            {
                foreach(var each in InstanceRoomManager.Instance.getInstanceRooms())
                {
                    var room_key = each.Key;
                    var instance_room = each.Value;

                    var found_ugc_npc = instance_room.getMap().findUgcNpc(ugcNpcMetaGuid);
                    if(null != found_ugc_npc)
                    {
                        return found_ugc_npc;
                    }
                }
            }

            return null;
        }

        public static async Task<(Result, EntityBase?)> findInstanceNpc(EntityType targetNpcType, ENTITY_INSTANCE_GUID entityInstanceGuid)
        {
            var result = new Result();
            var err_msg = string.Empty;

            switch (targetNpcType)
            {
                case EntityType.UgcNpc:
                case EntityType.Beacon:
                    (result, var found_ugc_npc) = await findInstanceUgcNpc(entityInstanceGuid);
                    if (result.isSuccess())
                    {
                        return (result, found_ugc_npc);
                    }
                    break;

                default:
                    err_msg = $"Invalid EntityType of Npc !!! : targetNpcType:{targetNpcType}, entityInstanceGuid:{entityInstanceGuid}";
                    result.setFail(ServerErrorCode.EntityTypeInvalid, err_msg);
                    Log.getLogger().error(result.toBasicString());
                    break;
            }

            return (result, null);
        }

        public static async Task<(Result, UgcNpc?)> findInstanceUgcNpc(ENTITY_INSTANCE_GUID entityInstanceGuid)
        {
            var result = new Result();
            var err_msg = string.Empty;

            var server_logic = GameServerApp.getServerLogic();
            NullReferenceCheckHelper.throwIfNull(server_logic, () => $"server_logic is null !!! : entityInstanceGuid:{entityInstanceGuid}");
            var player_manager = server_logic.getPlayerManager();
            NullReferenceCheckHelper.throwIfNull(player_manager, () => $"player_manager is null !!! : entityInstanceGuid:{entityInstanceGuid}");

            UgcNpc? found_ugc_npc = null;

            // 채널 및 던전에 있는지 조회 한다. !!!
            found_ugc_npc = server_logic.findUgcNpcInGameZone(entityInstanceGuid);
            if (null != found_ugc_npc)
            {
                return (result, found_ugc_npc);
            }

            err_msg = $"Not found UgcNpc !!! : entityInstanceGuid:{entityInstanceGuid}";
            result.setFail(ServerErrorCode.UgcNpcNotFound, err_msg);
            Log.getLogger().error(result.toBasicString());

            return await Task.FromResult<(Result, UgcNpc?)>((result, null));
        }
        public static async Task notifyNpcInfo(Player player, EntityType targetNpcType, EntityBase entityNpc)
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!! : targetNpcType:{targetNpcType}");
            ArgumentNullReferenceCheckHelper.throwIfNull(entityNpc, () => $"entityNpc is null !!! : targetNpcType:{targetNpcType} - {player.toBasicString()}");

            var result = new Result();
            var err_msg = string.Empty;

            switch (targetNpcType)
            {
                case EntityType.UgcNpc:
                case EntityType.Beacon:
                    var ugc_npc = entityNpc as UgcNpc;
                    ArgumentNullReferenceCheckHelper.throwIfNull(ugc_npc, () => $"ugc_npc is null !!! : targetNpcType:{targetNpcType} - {player.toBasicString()}");

                    var ugc_npc_meta_guid = ugc_npc.getUgcNpcMetaGuid();
                    (result, var like_count) = await UgcNpcHelper.getLikeCountOfUgcNpc(ugc_npc_meta_guid, player);
                    if(result.isFail())
                    {
                        err_msg = $"Failed to UgcNpcHelper.getLikeCountOfUgcNpc() !!! : {result.toBasicString()}, targetNpcType:{targetNpcType}, ugcNpc:{ugc_npc.toBasicString()}";
                        Log.getLogger().error(err_msg);
                    }

                    (result, var dialog_count) = await UgcNpcHelper.getDialogCountOfUgcNpc(ugc_npc_meta_guid, player);
                    if (result.isFail())
                    {
                        err_msg = $"Failed to UgcNpcHelper.getDialogCountOfUgcNpc() !!! : {result.toBasicString()}, targetNpcType:{targetNpcType}, ugcNpc:{ugc_npc.toBasicString()}";
                        Log.getLogger().error(err_msg);
                    }

                    var ugc_npc_action = ugc_npc.getEntityAction<UgcNpcAction>();
                    NullReferenceCheckHelper.throwIfNull(ugc_npc_action, () => $"ugc_npc_action is null !!! : targetNpcType:{targetNpcType} - {player.toBasicString()}");

                    UgcNpcNotifyHelper.send_GS2C_NTF_BEACON_DETAIL_INFO(player, ugc_npc_action.toUgcNpcSummary(), like_count, dialog_count);              
                    break;

                default:
                    err_msg = $"Invalid EntityType of Npc !!! : targetNpcType:{targetNpcType}, entityNpc:{entityNpc.toBasicString()}";
                    result.setFail(ServerErrorCode.EntityTypeInvalid, err_msg);
                    Log.getLogger().error(result.toBasicString());
                    break;
            }
        }

        public static async Task notifyNpcInteractionInfo(Player player, EntityType targetNpcType, EntityBase entityNpc)
        {
            ArgumentNullReferenceCheckHelper.throwIfNull(player, () => $"player is null !!! : targetNpcType:{targetNpcType}");
            ArgumentNullReferenceCheckHelper.throwIfNull(entityNpc, () => $"entityNpc is null !!! : targetNpcType:{targetNpcType} - {player.toBasicString()}");

            var result = new Result();
            var err_msg = string.Empty;

            switch (targetNpcType)
            {
                case EntityType.UgcNpc:
                case EntityType.Beacon:
                    var ugc_npc = entityNpc as UgcNpc;
                    ArgumentNullReferenceCheckHelper.throwIfNull(ugc_npc, () => $"ugc_npc is null !!! : targetNpcType:{targetNpcType} - {player.toBasicString()}");

                    var ugc_npc_meta_guid = ugc_npc.getUgcNpcMetaGuid();
                    (result, var is_check_like) = await UgcNpcHelper.getLikeCheckFlagOfUgcNpc(ugc_npc_meta_guid, player);
                    if (result.isFail())
                    {
                        err_msg = $"Failed to UgcNpcHelper.getLikeCheckFlagOfUgcNpc() !!! : {result.toBasicString()}, targetNpcType:{targetNpcType}, ugcNpc:{ugc_npc.toBasicString()}";
                        Log.getLogger().error(err_msg);
                    }

                    var ugc_npc_action = ugc_npc.getEntityAction<UgcNpcAction>();
                    NullReferenceCheckHelper.throwIfNull(ugc_npc_action, () => $"ugc_npc_action is null !!! : targetNpcType:{targetNpcType} - {player.toBasicString()}");

                    UgcNpcNotifyHelper.send_GS2C_NTF_BEACON_INTERACTION_INFO(player, ugc_npc, ugc_npc_action.toUgcNpcInteraction(is_check_like));
                    break;

                default:
                    err_msg = $"Invalid EntityType of Npc !!! : targetNpcType:{targetNpcType}, entityNpc:{entityNpc.toBasicString()}";
                    result.setFail(ServerErrorCode.EntityTypeInvalid, err_msg);
                    Log.getLogger().error(result.toBasicString());
                    break;
            }
        }
    }
}