using ServerCommon;
using ServerCore; using ServerBase;

namespace GameServer
{
    public class DBQEndQuestsReadAll : QueryExecutorBase
    {
        private string m_combination_key_for_pk = string.Empty;
        private string m_pk = string.Empty;

        //private readonly List<EndQuestDoc> m_to_read_end_quest_docs = new();

        public DBQEndQuestsReadAll(string combinationKeyForPK /*onwer_guid*/)
            : base(typeof(DBQEndQuestsReadAll).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 EndQuestDoc();
            doc.setCombinationKeyForPK(m_combination_key_for_pk);

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

            m_pk = doc.getPK();

            return Task.FromResult(result);
        }


        //===================================================================================================
        // onPrepareQuery()를 성공할 경우 호출된다.
        //===================================================================================================
        public override async Task<Result> onQuery()
        {
            var result = new Result();
            var err_msg = string.Empty;

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

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

            (result, var read_docs) = await db_connector.simpleQueryDocTypesWithQueryOperationConfig<EndQuestDoc>(query_config, eventTid: query_batch.getTransId());
            if (result.isFail())
            {
                return await Task.FromResult(result);
            }

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

            var end_quest_action = owner.getEntityAction<EndQuestAction>();
            NullReferenceCheckHelper.throwIfNull(end_quest_action, () => "end_quest_action is null !!!");

            foreach (var read_doc in read_docs)
            {
                var set_result = end_quest_action.setEndQuestsFromDoc(read_doc);
                if (set_result.isFail())
                {
                    Log.getLogger().error(result.toBasicString());
                    continue;
                }
            }

            return result;
        }

        //===================================================================================================
        // DB 쿼리를 성공하고, doFnCommit()가 QueryResultType.NotCalledQueryFunc를 반환할 경우 호출된다.
        //===================================================================================================
        public override Task onQueryResponseCommit()
        {
            return Task.CompletedTask;
        }

        //===================================================================================================
        // DB 쿼리를 실패하고, doFnRollback()가 QueryResultType.NotCalledQueryFunc를 반환할 경우 호출된다.
        //===================================================================================================
        public override Task onQueryResponseRollback(Result errorResult)
        {
            return Task.CompletedTask;
        }

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