using System.Diagnostics;
using System.Threading;
using System.Threading.Tasks;
using Masking.Serilog;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Serilog;

Host.CreateDefaultBuilder(args)
    .ConfigureLogging((context, logBuilder) =>
    {
        var logConfig = new LoggerConfiguration()
            .Enrich.FromLogContext()
            .ReadFrom.Configuration(context.Configuration)
            .WriteTo.Console()
            .Destructure.ByMaskingProperties(opt =>
            {
                opt.PropertyNames.Add(nameof(MailConfig.Password));
                opt.Mask = "***";
                opt.ExcludeStaticProperties = true;
            });
        var logger = logConfig.CreateLogger();
        logBuilder.ClearProviders().AddSerilog(logger);
    })
    .ConfigureServices(services => services.AddHostedService<Dummy>())
    .Build().Run();

class Dummy : IHostedService
{
    private readonly ILogger<Dummy> _log;
    public Dummy(ILogger<Dummy> log) => _log = log;

    public Task StartAsync(CancellationToken cancellationToken)
    {
        // enable for error tracing
        Serilog.Debugging.SelfLog.Enable(msg => Debug.WriteLine(msg));
        var config = new MailConfig
        {
            Username = "user",
            Password = "secret",
            ServerAddress = "localhost",
            Port = 25,
            UseSecureMode = false
        };
        _log.LogInformation("Dumping my {@Config}", config);
        return Task.CompletedTask;
    }

    public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask;
}

record ConnectionConfig
{
    public int Port { get; set; }
    public bool UseSecureMode { get; set; }
}

record MailConfig : ConnectionConfig
{
    public string Username { get; set; } = string.Empty;
    public string Password { get; set; } = string.Empty;
    public string ServerAddress { get; set; } = string.Empty;
}