using MQTTnet.Protocol;
using MQTTnet.Server;

namespace IotMqttServer
{
    internal class Program
    {
        static async Task Main(string[] args)
        {
            var mqttServerFactory = new MqttServerFactory();

            var mqttServerOptions = new MqttServerOptionsBuilder().WithDefaultEndpoint().Build();

            using (var mqttServer = mqttServerFactory.CreateMqttServer(mqttServerOptions))
            {
                // Setup connection validation before starting the server so that there is
                // no change to connect without valid credentials.
                mqttServer.ValidatingConnectionAsync += e =>
                {
                    //if (e.ClientId != "ValidClientId")
                    //{
                    //    e.ReasonCode = MqttConnectReasonCode.ClientIdentifierNotValid;
                    //}

                    //if (e.UserName != "ValidUser")
                    //{
                    //    e.ReasonCode = MqttConnectReasonCode.BadUserNameOrPassword;
                    //}

                    //if (e.Password != "SecretPassword")
                    //{
                    //    e.ReasonCode = MqttConnectReasonCode.BadUserNameOrPassword;
                    //}

                    return Task.CompletedTask;
                };

                mqttServer.ClientDisconnectedAsync += MqttServer_ClientDisconnectedAsync;
                mqttServer.ClientConnectedAsync += MqttServer_ClientConnectedAsync;
                await mqttServer.StartAsync();

                Console.WriteLine("Press Enter to exit.");
                Console.ReadLine();

                await mqttServer.StopAsync();
            }
            Console.WriteLine("Hello, World!");
        }

        private static Task MqttServer_ClientDisconnectedAsync(ClientDisconnectedEventArgs arg)
        {
            throw new NotImplementedException();
        }

        private static Task MqttServer_ClientConnectedAsync(ClientConnectedEventArgs arg)
        {
            throw new NotImplementedException();
        }
    }
}