using System;
using MQTTnet.Core.Adapter;
using MQTTnet.Core.Client;
using MQTTnet.Core.Serializer;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using MQTTnet.Implementations;
using MQTTnet.Core.ManagedClient;
using MQTTnet.Core.Server;
using MQTTnet.Core.Channel;

namespace MQTTnet
{
    public class MqttFactory : IMqttCommunicationAdapterFactory, IMqttClientSesssionFactory, IMqttClientFactory, IMqttServerFactory
    {
        private readonly IServiceProvider _serviceProvider;

        public MqttFactory()
            : this(BuildServiceProvider())
        {
        }

        public MqttFactory(IServiceProvider serviceProvider)
        {
            _serviceProvider = serviceProvider;
        }

        public ILoggerFactory GetLoggerFactory()
        {
            return _serviceProvider.GetRequiredService<ILoggerFactory>();
        }

        public IMqttCommunicationAdapter CreateClientCommunicationAdapter(IMqttClientOptions options)
        {
            var logger = _serviceProvider.GetRequiredService<ILogger<MqttChannelCommunicationAdapter>>();
            return new MqttChannelCommunicationAdapter(CreateCommunicationChannel(options.ChannelOptions), CreateSerializer(options.ProtocolVersion), logger);
        }

        public IMqttCommunicationAdapter CreateServerCommunicationAdapter(IMqttCommunicationChannel channel)
        {
            var serializer = _serviceProvider.GetRequiredService<IMqttPacketSerializer>();
            var logger = _serviceProvider.GetRequiredService<ILogger<MqttChannelCommunicationAdapter>>();
            return new MqttChannelCommunicationAdapter(channel, serializer, logger);
        }

        public IMqttCommunicationChannel CreateCommunicationChannel(IMqttClientChannelOptions options)
        {
            if (options == null) throw new ArgumentNullException(nameof(options));

            switch (options)
            {
                case MqttClientTcpOptions tcpOptions:
                    return CreateTcpChannel(tcpOptions);
                case MqttClientWebSocketOptions webSocketOptions:
                    return CreateWebSocketChannel(webSocketOptions);
                default:
                    throw new NotSupportedException();
            }
        }

        public MqttTcpChannel CreateTcpChannel(MqttClientTcpOptions tcpOptions)
        {
            return new MqttTcpChannel(tcpOptions);
        }

        public MqttWebSocketChannel CreateWebSocketChannel(MqttClientWebSocketOptions webSocketOptions)
        {
            return new MqttWebSocketChannel(webSocketOptions);
        }

        public MqttPacketSerializer CreateSerializer(MqttProtocolVersion protocolVersion)
        {
            return new MqttPacketSerializer
            {
                ProtocolVersion = protocolVersion
            };
        }

        public MqttClientSession CreateClientSession(string clientId, MqttClientSessionsManager clientSessionsManager)
        {
            return new MqttClientSession(
                clientId,
                _serviceProvider.GetRequiredService<IOptions<MqttServerOptions>>(),
                clientSessionsManager,
                _serviceProvider.GetRequiredService<MqttClientSubscriptionsManager>(),
                _serviceProvider.GetRequiredService<ILogger<MqttClientSession>>(),
                _serviceProvider.GetRequiredService<ILogger<MqttClientPendingMessagesQueue>>(),
                _serviceProvider.GetRequiredService<IMqttClientRetainedMessageManager>()
                );
        }

        public IMqttClient CreateMqttClient()
        {
            return _serviceProvider.GetRequiredService<IMqttClient>();
        }

        public IManagedMqttClient CreateManagedMqttClient()
        {
            return _serviceProvider.GetRequiredService<IManagedMqttClient>();
        }

        public IMqttServer CreateMqttServer()
        {
            return _serviceProvider.GetRequiredService<IMqttServer>();
        }

        public IMqttServer CreateMqttServer(Action<MqttServerOptions> configure)
        {
            if (configure == null) throw new ArgumentNullException(nameof(configure));

            var options = _serviceProvider.GetRequiredService<IOptions<MqttServerOptions>>();
            configure(options.Value);

            return _serviceProvider.GetRequiredService<IMqttServer>();
        }

        private static IServiceProvider BuildServiceProvider()
        {
            var serviceProvider = new ServiceCollection()
                .AddMqttClient()
                .AddMqttServer()
                .AddLogging()
                .BuildServiceProvider();

            serviceProvider.GetRequiredService<ILoggerFactory>()
                .AddMqttTrace();

            return serviceProvider;
        }
    }
}