using System;

​

namespace SimulatorCore.Logging

{

    public class SimulatorLogging

    {

        private static ILoggerProvider _logger;

        private static Lazy<ILoggerProvider> _defaultLogger = new Lazy<ILoggerProvider>(() => new DefaultLoggerProvider());

        public static ILoggerProvider Logger

        {

            get

            {

                if (_logger == null)

                {

                    Logger = _defaultLogger.Value;

                }

​

                return _logger;

            }

​

            set

            {

                if (_logger != null)

                {

                    throw new InvalidOperationException("Cant init logger more than once");

                }

​

                _logger = value;

            }

        }

​

        public static IExceptionLogger GetInstance(Type type)

        {

            return _logger.GetInstance(type);

        }

​

        public static IExceptionLogger GetInstance(string name)

        {

            return _logger.GetInstance(name);

        }

    }

​

    public interface ILoggerProvider

    {

        IExceptionLogger GetInstance(Type type);

        IExceptionLogger GetInstance(string name);

    }

​

    public interface IExceptionLogger

    {

    }

​

    public class DefaultLoggerProvider : ILoggerProvider

    {

        public IExceptionLogger GetInstance(Type type) => null; //Real logger here

        public IExceptionLogger GetInstance(string name) => null;

    }

​

    public class TestLoggerProvider : ILoggerProvider

    {

        public IExceptionLogger GetInstance(Type type) => null; //Fake logger here

        public IExceptionLogger GetInstance(string name) => null;

    }

}