using ServerCommon;
using ServerCore; using ServerBase;

namespace GameServer.Contents.Room.DbQuery;

public class DBQRoomReadTarget : QueryExecutorBase
{

    private string m_pk { get; set; } = string.Empty;
    private string m_sk { get; set; }
    private readonly string m_combination_key_for_pk;
    private RoomDoc m_to_read_room_doc = new();

    public DBQRoomReadTarget(string combinationKeyForPk, int room_id) : base(nameof(DBQRoomReadTarget))
    {
        m_combination_key_for_pk = combinationKeyForPk;
        m_sk = room_id.ToString();
    }
    
    //=====================================================================================
    // DB 쿼리 직전에 준비해야 할 로직들을 작성한다.
    //=====================================================================================
    public override async Task<Result> onPrepareQuery()
    {
        var result = new Result();

        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()}";
            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 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, m_sk);

        (result, var read_doc) = await db_connector.simpleQueryDocTypeWithQueryOperationConfig<RoomDoc>(query_config, eventTid: query_batch.getTransId());
        if (result.isFail()) return result;
        
        // todo (sangyeob.kim): DBQReadTarget에서 획득한 doc을 필요로 하는 action 으로 보내야 한다. 
        // ....
        
        m_to_read_room_doc = read_doc!;
        return await Task.FromResult(new 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;
}