///
/// Copyright (c) 2017 Sensus Metering Systems
///
using System;
using System.Collections.Generic;
using FluentNHibernate.Cfg;
using FluentNHibernate.Cfg.Db;
using log4net;
using NHibernate;
using NHibernate.Cfg;
using NHibernate.Tool.hbm2ddl;
using Results.Entities;

namespace Results
{
    public class DBase
    {
		static readonly ILog log = LogManager.GetLogger(typeof(DBase));

		/// <summary> Session factory for all regular sessions, not for CreateEmptyResultsDB(). </summary>
		public static IList<DBase> Databases;
        public static int Count { get { return Databases.Count; } }

        static DBase()
        {
            Databases = new List<DBase>();
        }


        public readonly string Name;
        public readonly string ConnectionString;

        ISessionFactory sessionFactory;

        public DBase(string connectionString, string name)
        {
            this.ConnectionString = connectionString;
            this.Name = name;
            sessionFactory = Fluently.Configure()
                                     .Database(MySQLConfiguration.Standard.ConnectionString(connectionString))
                                     .Mappings(m => m.FluentMappings.AddFromAssemblyOf<Entities.WaterMeterData>())
                                     .ExposeConfiguration(BuildSchema)
                                     .BuildConfiguration()
                                     .SetProperty("hibernate.connection.connect_timeout", Common.Const.MySqlConnectTimeoutSec)
                                     .BuildSessionFactory();
        }

        public DBase(string connectionString)
            : this(connectionString, string.Empty)
        {
        }


        private void BuildSchema(Configuration config)
        {
            /// This NHibernate tool takes a configuration with mapping info and exports a database schema
            new SchemaExport(config).SetOutputFile("db_schema");
        }

        public ISession OpenSession()
        {
            return sessionFactory.OpenSession();
        }
	}
}