using ServerCommon;
using ServerCore; using ServerBase;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace GameServer
{
    public class DBQFriendFoldersReadAll : QueryExecutorBase
    {
        //prefix 문자열 뒤에 붙는 문자열을 의미
        private string m_combination_key_for_pk = string.Empty;
        private string m_pk = string.Empty;

        private readonly List<DynamoDbDocBase> m_to_read_friend_folder_list_base_docs = new();

        public DBQFriendFoldersReadAll(string combinationKeyForPK /*onwer_guid*/)
            : base(typeof(DBQFriendFoldersReadAll).Name)
        {
            m_combination_key_for_pk = combinationKeyForPK;
        }

        //===================================================================================================
        // DB 쿼리 직전에 준비해야 할 로직들을 작성한다.
        //===================================================================================================
        public override Task<Result> onPrepareQuery()
        {
            var result = new Result();

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

            var doc = new FriendFolderDoc(m_combination_key_for_pk);
            var error_code = doc.onApplyPKSK();
            if (error_code.isFail())
            {
                var err_msg = $"Failed to onApplyPKSK() !!! : {error_code.toBasicString()} - {owner.toBasicString()}";
                result.setFail(error_code, err_msg);
                Log.getLogger().error(err_msg);
                return Task.FromResult(result);
            }
            
            m_pk = doc.getPK();


            return Task.FromResult(result);
        }

        //===================================================================================================
        // onPrepareQuery()를 성공할 경우 호출된다.
        //===================================================================================================
        public override async Task<Result> onQuery()
        {
            var owner = getOwner();
            NullReferenceCheckHelper.throwIfNull(owner, () => $"owner is null !!!");

            var query_batch = getQueryBatch();
            NullReferenceCheckHelper.throwIfNull(query_batch, () => $"query_batch is null !!!");

            var db_connector = query_batch.getDynamoDbConnector();
            var query_config = db_connector.makeQueryConfigForReadByPKSK(m_pk);

            (var result, var read_docs) = await db_connector.simpleQueryDocTypesWithQueryOperationConfig<FriendFolderDoc>(query_config, eventTid: query_batch.getTransId());
            if (result.isFail())
            {
                var err_msg = $"FriendFolderDoc Reas Error !!! : - {toBasicString()}, {owner.toBasicString()}";
                Log.getLogger().error(result.toBasicString());
                return result;
            }

            m_to_read_friend_folder_list_base_docs.AddRange(read_docs);

            //이건 select만 해오는 거니 그냥 여기서 셋팅 처리
            var friend_folder_attribute = owner.getEntityAttribute<FriendFolderAttribute>();
            NullReferenceCheckHelper.throwIfNull(friend_folder_attribute, () => $"friend_folder_attribute is null !!!");

            result = await ServerBase.DataCopyHelper.copyEntityAttributeFromDocs(friend_folder_attribute, m_to_read_friend_folder_list_base_docs);
            if (result.isFail())
            {
                return result;
            }

            return result;
        }


        //===================================================================================================
        // DB 쿼리를 성공하고, doFnCommit()가 QueryResultType.NotCalledQueryFunc를 반환할 경우 호출된다.
        //===================================================================================================
        public override Task onQueryResponseCommit()
        {
            Log.getLogger().debug("DBQFriendFoldersReadAll.onQueryResponseCommit() : " + toBasicString());
            return Task.CompletedTask;
        }


        //===================================================================================================
        // DB 쿼리를 실패하고, doFnRollback()가 QueryResultType.NotCalledQueryFunc를 반환할 경우 호출된다.
        //===================================================================================================
        public override Task onQueryResponseRollback(Result errorResult)
        {
            Log.getLogger().debug("DBQFriendFoldersReadAll.onQueryResponseRollback() : " + toBasicString());
            return Task.CompletedTask;
        }

        public new Player? getOwner() => getQueryBatch()?.getLogActor() as Player;
    }
}