using BTCPayServer.Configuration;
using BTCPayServer.Logging;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Logging;
using System;
using BTCPayServer.Hosting;
using NBitcoin;
using Microsoft.Extensions.DependencyInjection;
using System.Runtime.InteropServices;
using System.Linq;
using System.Diagnostics;
using System.IO;
using System.Net;
using System.Collections.Generic;
using System.Collections;
using Microsoft.AspNetCore.Hosting.Server.Features;
using System.Threading;
using Serilog;

namespace BTCPayServer
{
    class Program
    {
        private const long MAX_DEBUG_LOG_FILE_SIZE = 2000000; // If debug log is in use roll it every N MB.

        static void Main(string[] args)
        {
            ServicePointManager.DefaultConnectionLimit = 100;
            IWebHost host = null;
            var processor = new ConsoleLoggerProcessor();
            CustomConsoleLogProvider loggerProvider = new CustomConsoleLogProvider(processor);
            var loggerFactory = new LoggerFactory();
            loggerFactory.AddProvider(loggerProvider);
            var logger = loggerFactory.CreateLogger("Configuration");
            try
            {
                // This is the only way that LoadArgs can print to console. Because LoadArgs is called by the HostBuilder before Logs.Configure is called
                var conf = new DefaultConfiguration() { Logger = logger }.CreateConfiguration(args);
                if (conf == null)
                    return;
                Logs.Configure(loggerFactory);
                new BTCPayServerOptions().LoadArgs(conf);
                Logs.Configure(null);
                /////

                host = new WebHostBuilder()
                    .UseKestrel()
                    .UseIISIntegration()
                    .UseContentRoot(Directory.GetCurrentDirectory())
                    .UseConfiguration(conf)
                    .ConfigureLogging(l =>
                    {
                        l.AddFilter("Microsoft", LogLevel.Error);
                        l.AddFilter("System.Net.Http.HttpClient", LogLevel.Critical);
                        l.AddFilter("Microsoft.AspNetCore.Antiforgery.Internal", LogLevel.Critical);
                        l.AddProvider(new CustomConsoleLogProvider(processor));

                        // Use Serilog for debug log file.
                        var debugLogFile = BTCPayServerOptions.GetDebugLog(conf);
                        if (string.IsNullOrEmpty(debugLogFile) != false) return;
                        Serilog.Log.Logger = new LoggerConfiguration()
                            .Enrich.FromLogContext()
                            .MinimumLevel.Is(BTCPayServerOptions.GetDebugLogLevel(conf))
                            .WriteTo.File(debugLogFile, rollingInterval: RollingInterval.Day, fileSizeLimitBytes: MAX_DEBUG_LOG_FILE_SIZE, rollOnFileSizeLimit: true, retainedFileCountLimit: 1)
                            .CreateLogger();

                        l.AddSerilog(Serilog.Log.Logger);
                    })
                    .UseStartup<Startup>()
                    .Build();
                host.StartAsync().GetAwaiter().GetResult();
                var urls = host.ServerFeatures.Get<IServerAddressesFeature>().Addresses;
                foreach (var url in urls)
                {
                    logger.LogInformation("Listening on " + url);
                }
                host.WaitForShutdown();
            }
            catch (ConfigException ex)
            {
                if (!string.IsNullOrEmpty(ex.Message))
                    Logs.Configuration.LogError(ex.Message);
            }
            finally
            {
                processor.Dispose();
                if(host == null)
                    Logs.Configuration.LogError("Configuration error");
                if (host != null)
                    host.Dispose();
                Serilog.Log.CloseAndFlush();
                loggerProvider.Dispose();
            }
        }
    }
}
