using ServerCore;
using ServerBase;
using ServerCommon;


namespace GameServer;

public class DBQRoomReadAll : QueryExecutorBase
{
    private string m_pk { get; set; } = string.Empty;
    private readonly string m_combination_key_for_pk;
    private readonly List<RoomDoc> m_to_read_room_docs = new();
    
    public DBQRoomReadAll(string combinationKeyForPk) : base(nameof(DBQRoomReadAll))
    {
        m_combination_key_for_pk = combinationKeyForPk;
    }

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

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

        var doc = new RoomDoc();
        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 result;
        }

        m_pk = doc.getPK();

        return await 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.makeQueryConfigForReadByPKSK(m_pk);

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

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

        foreach (var read_doc in read_docs)
        {
            result = await room_action.setRoomFromDoc(read_doc);
            if (result.isFail()) return result;

            m_to_read_room_docs.Add(read_doc);
        }
        
        return await Task.FromResult(result);
    }

    //=====================================================================================
    // DB 쿼리를 성공하고, doFnCommit()가 QueryResultType.NotCalledQueryFunc를 반환할 경우 호출된다.
    //=====================================================================================
    public override async Task onQueryResponseCommit() => await Task.CompletedTask;
    
    //=====================================================================================
    // DB 쿼리를 실패하고, doFnRollback()가 QueryResultType.NotCalledQueryFunc를 반환할 경우 호출된다.
    //=====================================================================================
    public override async Task onQueryResponseRollback(Result errorResult) => await Task.CompletedTask;
    
    private new Player? getOwner() => getQueryBatch()?.getLogActor() as Player;
}