using System;
using Serilog;
using Topshelf;

namespace ZB.MOM.WW.OtOpcUa.Host
{
    internal static class Program
    {
        private static int Main(string[] args)
        {
            // Set working directory to exe location so relative log paths resolve correctly
            // (Windows services default to System32)
            Environment.CurrentDirectory = AppDomain.CurrentDomain.BaseDirectory;

            Log.Logger = new LoggerConfiguration()
                .MinimumLevel.Information()
                .WriteTo.Console()
                .WriteTo.File(
                    "logs/lmxopcua-.log",
                    rollingInterval: RollingInterval.Day,
                    retainedFileCountLimit: 31)
                .CreateLogger();

            try
            {
                var exitCode = HostFactory.Run(host =>
                {
                    host.UseSerilog();

                    host.Service<OpcUaService>(svc =>
                    {
                        svc.ConstructUsing(() => new OpcUaService());
                        svc.WhenStarted(s => s.Start());
                        svc.WhenStopped(s => s.Stop());
                    });

                    host.SetServiceName("OtOpcUa");
                    host.SetDisplayName("LMX OPC UA Server");
                    host.SetDescription("OPC UA server exposing System Platform Galaxy tags via MXAccess.");
                    host.RunAsLocalSystem();
                    host.StartAutomatically();
                });

                return (int)exitCode;
            }
            catch (Exception ex)
            {
                Log.Fatal(ex, "Host terminated unexpectedly");
                return 1;
            }
            finally
            {
                Log.CloseAndFlush();
            }
        }
    }
}