using Amazon.Runtime.Internal.Transform;
using ServerCommon;
using ServerCore; using ServerBase;
using System;

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

        private List<TaskReservationDoc> m_to_read_task_reservation_docs = new();

        public DBQTaskReservationReadAll(string combinationKeyForPK)
            : base(typeof(DBQTaskReservationReadAll).Name)
        {
            m_combination_key_for_pk = combinationKeyForPK;        
        }

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

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

            var doc = new TaskReservationDoc();
            doc.setCombinationKeyForPK(m_combination_key_for_pk);

            var error_code = doc.onApplyPKSK();
            if (error_code.isFail())
            {
                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 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.makeQueryConfigForReadByPKOnly(m_pk);

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

            var task_reservation_action = owner.getEntityAction<TaskReservationAction>();
            NullReferenceCheckHelper.throwIfNull(task_reservation_action, () => $"task_reservation_action is null !!!");

            result = await task_reservation_action.AddTaskReservationFromDoc(read_docs);
            if (result.isFail())
            {
                return result;
            }

            m_to_read_task_reservation_docs.AddRange(read_docs);

            return await Task.FromResult(result);
        }

        public List<TaskReservationDoc> getToReadItemDocs() => m_to_read_task_reservation_docs;

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

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

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