using DigitalData.Modules.Database;
using DigitalData.Modules.Logging;
using EnvelopeGenerator.Common;

namespace EnvelopeGenerator.Web.Services
{
    public class DatabaseService
    {
        public MSSQLServer MSSQL { get; set; }

        private EnvelopeModel envelopeModel;
        private DocumentModel documentModel;
        private ReceiverModel receiverModel;
        private ElementModel elementModel;
        private HistoryModel historyModel;

        private readonly LogConfig _logConfig;
        private readonly Logger _logger;


        public DatabaseService(LoggingService Logging, IConfiguration Config)
        {
            _logConfig = Logging.LogConfig;
            _logger = Logging.LogConfig.GetLogger();

            _logger.Debug("Establishing MSSQL Database connection..");
            MSSQL = new MSSQLServer(_logConfig, Config["Config:ConnectionString"]);

            if (MSSQL.DBInitialized == true)
            {
                _logger.Debug("MSSQL Connection: [{0}]", MSSQL.CurrentConnectionString);

                var state = GetState();
                InitializeModels(state);
            }
            else
            {
                _logger.Warn("Connection could not be established!");
            }
        }

        public State GetState()
        {
            return new State
            {
                Database = MSSQL,
                LogConfig = _logConfig,
                UserId = 2 // TODO
            };
        }

        public void InitializeModels(State state)
        {
            envelopeModel = new(state);
            documentModel = new(state);
            receiverModel = new(state);
            elementModel = new(state);
            historyModel = new(state);
        }

        public EnvelopeResponse LoadEnvelope(string pEnvelopeKey)
        {
            Tuple<string, string> result = Helpers.DecodeEnvelopeReceiverId(pEnvelopeKey);
            var envelopeUuid = result.Item1;
            var receiverSignature = result.Item2;
            var receiverId = receiverModel.GetReceiverIdBySignature(receiverSignature);

            Envelope envelope = envelopeModel.GetByUuid(envelopeUuid);

            return new()
            {
                ReceiverId = receiverId,
                Envelope = envelope
            };
        }

        public List<Envelope> LoadEnvelopes(int pReceiverId)
        {
            return (List<Envelope>)envelopeModel.List(pReceiverId);
        }

        public EnvelopeDocument LoadDocument(int pDocumentId)
        {
            return documentModel.GetById(pDocumentId);
        }

        public bool InsertHistoryEntry(EnvelopeHistoryEntry historyEntry)
        {
            return historyModel.Insert(historyEntry);
        }

    }
}