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

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

        ILogger<DatabaseService> _logger;

        public State? State { get; set; }

        public class ServiceContainer
        {
            public ActionService actionService;
            public EmailService emailService;

            public ServiceContainer(State state)
            {
                actionService = new(state);
                emailService = new(state);
            }
        }

        public class ModelContainer
        {
            public EnvelopeModel envelopeModel;
            public DocumentModel documentModel;
            public ReceiverModel receiverModel;
            public ElementModel elementModel;
            public HistoryModel historyModel;
            public DocumentStatusModel documentStatusModel;
            public EmailModel emailModel;
            public ConfigModel configModel;

            public ModelContainer(State state)
            {
                envelopeModel = new(state);
                documentModel = new(state);
                receiverModel = new(state);
                elementModel = new(state);
                historyModel = new(state);
                documentStatusModel = new(state);
                emailModel = new(state);
                configModel = new(state);
            }
        }
        public readonly ModelContainer? Models;
        public readonly ServiceContainer? Services;

        public DatabaseService(ILogger<DatabaseService> logger, IConfiguration config)
        {
            LogConfig logConfig = new LogConfig(LogConfig.PathType.CustomPath, config["NLog:variables:logDirectory"], null, "Digital Data", "ECM.EnvelopeGenerator.Web");
            _logger = logger;

            _logger.LogInformation("Establishing MSSQL Database connection..");
            MSSQL = new MSSQLServer(logConfig, config.GetConnectionString(Key.Default));

            if (MSSQL.DBInitialized == true)
            {
                _logger.LogInformation("MSSQL Connection established: [{0}]", MSSQL.MaskedConnectionString);

                /// <summary>
                /// There is a circular dependency between state and models
                /// All models need a state object, including the config Model
                /// The state object needs to be filled with the DbConfig property,
                /// which is obtained by the config Model.
                /// So first, the config model is initialized with an incomplete state object,
                /// then all the other models with the DbConfig property filled.
                /// </summary>
                State = new State
                {
                    Database = MSSQL,
                    LogConfig = logConfig,
                    UserId = 0,
                    DbConfig = null
                };
                var configModel = new ConfigModel(State);
                State.DbConfig = configModel.LoadConfiguration();

                Models = new(State);
                Services = new(State);
            }
            else
            {
                _logger.LogInformation("Connection could not be established!");
            }
        }
    }
}