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 WORLD_META_ID = System.UInt32;
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 ITEM_GUID = System.String;
using ServerCommon.BusinessLogDomain;


namespace GameServer
{
    public class CharacterLoader : EntityLoaderBase
    {
        private ServerCommon.BusinessLogDomain.CharacterLogInfo m_character_log = new();

        public CharacterLoader(Player owner)
            : base(owner)
        {
        }

        public override async Task<Result> onPrepareLoad()
        {
            await Task.CompletedTask;

            var result = new Result();

            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");

            setCompetedPrepareLoad(true);

            return result;
        }

        public override async Task<Result> onTriggerEffect()
        {
            await Task.CompletedTask;

            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");
            var server_logic = GameServerApp.getServerLogic();
            NullReferenceCheckHelper.throwIfNull(server_logic, () => $"server_logic is null !!! - {owner.toBasicString()}");

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

            if (false == isCompletedPrepareLoad())
            {
                err_msg = $"Not completed isCompletedPrepareLoad() !!! - {toBasicString()}, {owner.toBasicString()}";
                result.setFail(ServerErrorCode.CharacterPrepareLoadNotCompleted  , err_msg);

                return result;
            }

            var batch = new QueryBatchEx<QueryRunnerWithDocument>( owner, LogActionType.CharacterLoading
                                                                 , server_logic.getDynamoDbClient() );
            {
                var user_attribute = owner.getEntityAttribute<UserAttribute>();
                NullReferenceCheckHelper.throwIfNull(user_attribute, () => $"user_attribute is null !!! - {owner.toBasicString()}");

                batch.addQuery(new DBQCharacterReadAll(user_attribute.UserGuid));
                batch.addQuery(new QueryFinal(), tryUpdateCharacterLoadStep);
            }

            result = await QueryHelper.sendQueryAndBusinessLog(batch);
            if (result.isFail())
            {
                return result;
            }

            return result;
        }

        public async Task<QueryBatchBase.QueryResultType> tryUpdateCharacterLoadStep(QueryExecutorBase queryExecutorBase)
        {
            await Task.CompletedTask;

            var err_msg = string.Empty;
            var query_result_type = QueryBatchBase.QueryResultType.Success;

            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");

            var user_create_or_load_action = owner.getEntityAction<UserCreateOrLoadAction>();
            NullReferenceCheckHelper.throwIfNull(user_create_or_load_action, () => $"user_create_or_load_action is null !!! - {owner.toBasicString()}");

            user_create_or_load_action.clearReservedCharacterForCreation();

            var player_action = owner.getEntityAction<PlayerAction>();
            NullReferenceCheckHelper.throwIfNull(player_action, () => $"player_action is null !!! - {owner.toBasicString()}");

            var selected_character = player_action.getSelectedCharacter();
            if(null == selected_character)
            {
                err_msg = $"Character Not selected !!! - {owner.toBasicString()}";
                getLoadResult().setFail(ServerErrorCode.CharacterNotSelected, err_msg);

                return query_result_type;
            }

            var query_batch = queryExecutorBase.getQueryBatch();
            NullReferenceCheckHelper.throwIfNull(query_batch, () => $"query_batch is null !!! - {owner.toBasicString()}");
            var log_action = query_batch.getLogAction();
            NullReferenceCheckHelper.throwIfNull(log_action, () => $"log_action is null !!! - {owner.toBasicString()}");

            var character_attribute = selected_character.getEntityAttribute<CharacterAttribute>();
            NullReferenceCheckHelper.throwIfNull(character_attribute, () => $"character_attribute is null !!! - {owner.toBasicString()}");

            (var result, var character_log_info) = await character_attribute.toCharacterLogInfo();
            if (result.isFail())
            {
                err_msg = $"Failed to toCharacterLogInfo() !!! : {result.toBasicString()} - {toBasicString()}, {owner.toBasicString()}";
                Log.getLogger().error(err_msg);
            }
            else
            {
                if (character_log_info is not null)
                {
                    m_character_log.setInfo(character_log_info);
                    // 비즈니스 로그 추가
                    query_batch.appendBusinessLog(new CharacterBusinessLog(log_action, m_character_log));
                }
                
            }

            getLoadResult().setSuccess();

            setCompleted();

            return query_result_type;
        }
    }
}