using System.Net;

using NLog;

using SimpleRpc.Transports;
using SimpleRpc.Transports.Http.Server;
using SimpleRpc.Serialization.Hyperion;
using ChatRoomContract;

namespace ChatRoom;

public class Server
{
    /// <summary>
    /// Logger for this class.
    /// </summary>
    Logger log = LogManager.GetCurrentClassLogger();

    /// <summary>
    /// Configure loggin subsystem.
    /// </summary>
    private void ConfigureLogging()
    {
        var config = new NLog.Config.LoggingConfiguration();

        var console =
            new NLog.Targets.ConsoleTarget("console")
            {
                Layout = @"${date:format=HH\:mm\:ss}|${level}| ${message} ${exception}"
            };
        config.AddTarget(console);
        config.AddRuleForAllLevels(console);

        LogManager.Configuration = config;
    }

    /// <summary>
    /// Program entry point.
    /// </summary>
    /// <param name="args">Command line arguments.</param>
    public static void Main(string[] args)
    {
        var self = new Server();
        self.Run(args);
    }

    /// <summary>
    /// Program body.
    /// </summary>
    /// <param name="args">Command line arguments.</param>
    private void Run(string[] args)
    {
        //configure logging
        ConfigureLogging();

        //indicate server is about to start
        log.Info("Server is about to start");

        //start the server
        StartServer(args);
    }

    /// <summary>
    /// Starts integrated server.
    /// </summary>
    /// <param name="args">Command line arguments.</param>
    private void StartServer(string[] args)
    {
        ///create web app builder
        var builder = WebApplication.CreateBuilder(args);

        //configure integrated server
        builder.WebHost.ConfigureKestrel(opts => {
            opts.Listen(IPAddress.Loopback, 5000);
        });

        //add SimpleRPC services
        builder.Services
            .AddSimpleRpcServer(new HttpServerTransportOptions { Path = "/simplerpc" })
            .AddSimpleRpcHyperionSerializer();

        //add our custom services
        builder.Services
            // .AddScoped<IChatRoomService, ChatRoomService>();  //instance-per-request, AddTransient would result in the same
            .AddSingleton<IChatRoomService>(new ChatRoomService());   //singleton

        //build the server
        var app = builder.Build();

        //add SimpleRPC middleware
        app.UseSimpleRpcServer();

        //run the server
        app.Run();
        // app.RunAsync(); //use this if you need to implement background processing in the main thread
    }
}