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


using Google.Protobuf.WellKnownTypes;
using Newtonsoft.Json;


using ServerCore;
using ServerBase;
using ServerControlCenter;


using USER_GUID = System.String;
using MASTER_GUID = System.String;
using MASTER_NICKNAME = System.String;
using Microsoft.AspNetCore.Http;
using Amazon.S3.Model;



namespace ServerCommon;

public static class EntityHelper
{
    public class MasterProfile
    {
        public MASTER_GUID MasterGuid { get; set; } = string.Empty;
        public MASTER_NICKNAME MasterNickname { get; set; } = string.Empty;
    }

    public static (Result, MasterProfile?) getMasterProfile<TMasterEntity>(EntityBase owner)
        where TMasterEntity : EntityBase
    {
        var result = new Result();
        var err_msg = string.Empty;

        var master_entity = owner as TMasterEntity;
        if (null == master_entity)
        {
            if (true == owner.hasMasterGuid())
            {
                master_entity = owner.onGetMasterEntity() as TMasterEntity;
                if (null == master_entity)
                {
                    err_msg = $"Not related Master !!! : TMasterEntity:{nameof(TMasterEntity)} - {owner.toBasicString()}";
                    result.setFail(ServerErrorCode.MasterNotFound, err_msg);
                    Log.getLogger().error(err_msg);

                    return (result, null);
                }
            }
            else
            {
                err_msg = $"Not related Master !!! : TMasterEntity:{nameof(TMasterEntity)} - {owner.toBasicString()}";
                result.setFail(ServerErrorCode.MasterNotRelated, err_msg);
                Log.getLogger().error(err_msg);

                return (result, null);
            }
        }

        var entity_profile = new MasterProfile();
        entity_profile.MasterGuid = (master_entity as dynamic).getUserGuid(); // 나중에 가상함수로 수정 하자. - kangms
        entity_profile.MasterNickname = (master_entity as dynamic).getUserNickname(); // 나중에 가상함수로 수정 하자. - kangms

        return (result, entity_profile);
    }

    public static OwnerEntityType toOwnerEntityType(this EntityType entityType)
    {
        if (EntityType.Player == entityType)
        {
            return OwnerEntityType.User;
        }
        else if (EntityType.Character == entityType)
        {
            return OwnerEntityType.Character;
        }
        else if (EntityType.UgcNpc == entityType
                || EntityType.Beacon == entityType)
        {
            return OwnerEntityType.UgcNpc;
        }
        else if (EntityType.MyHome == entityType)
        {
            return OwnerEntityType.Myhome;
        }

        var err_msg = $"Invalid EntityType !!! : EntityType:{entityType}";
        Log.getLogger().error(err_msg);

        return OwnerEntityType.None;
    }

    public static async Task<(Result, bool)> isUserLoggedIn(DynamoDbClient dynamoDbClient, USER_GUID userGuid)
    {
        var result = new Result();

        // 1. UserBaseDoc 조회        
        (result, var user_primary_key) = await DynamoDBDocBaseHelper.makePrimaryKey<UserBaseDoc>(userGuid);
        if (result.isFail())
        {
            return (result, false);
        }
        ArgumentNullException.ThrowIfNull(user_primary_key, $"user_primary_key is null !!! - userGuid:{userGuid}");
        var query_config = dynamoDbClient.makeQueryConfigForReadByPKSK(user_primary_key.PK);

        (result, var user_base_doc) = await dynamoDbClient.simpleQueryDocTypeWithQueryOperationConfig<UserBaseDoc>(query_config);
        if (result.isFail())
        {
            return (result, false);
        }
        NullReferenceCheckHelper.throwIfNull(user_base_doc, () => $"user_base_doc is null !!! : userGuid:{userGuid}");

        // 2. LoggedIn 체크
        var user_base_attrib = user_base_doc.getAttrib<UserBaseAttrib>();
        NullReferenceCheckHelper.throwIfNull(user_base_attrib, () => $"user_base_attrib is null !!!");

        return (result, (user_base_attrib.GameLoginDateTime > user_base_attrib.GameLogoutDateTime));
    }

    public static async Task<(Result, List<ItemDoc>?)> findUserItemsWithCondition( DynamoDbClient dynamoDbClient, USER_GUID userGuid
                                                                                 , Func<ItemDoc, bool>? filterCondition )
    {
        var result = new Result();

        // 1. ItemDoc 조회
        (result, var user_primary_key) = await DynamoDBDocBaseHelper.makePrimaryKey<ItemDoc>(userGuid);
        if (result.isFail())
        {
            return (result, null);
        }
        ArgumentNullException.ThrowIfNull(user_primary_key, $"user_primary_key is null !!! - userGuid:{userGuid}");
        var query_config = dynamoDbClient.makeQueryConfigForReadByPKOnly(user_primary_key.PK);

        (result, var found_item_docs) = await dynamoDbClient.simpleQueryDocTypesWithQueryOperationConfig<ItemDoc>(query_config);
        if (result.isFail())
        {
            return (result, null);
        }
        NullReferenceCheckHelper.throwIfNull(found_item_docs, () => $"found_item_docs is null !!! : userGuid:{userGuid}");

        if (null != filterCondition)
        {
            // 2. ItemDoc 조건 체크 !!!
            var filtered_item_docs = new List<ItemDoc>();

            foreach(var item_doc in found_item_docs)
            {
                var is_success = filterCondition.Invoke(item_doc);
                if (is_success.isFalse())
                {
                    continue;
                }

                filtered_item_docs.Add(item_doc);
            }

            return (result, filtered_item_docs);
        }

        return (result, found_item_docs);
    }
}