namespace Microsoft.AspNetCore.Builder
{
    public sealed class WebApplicationBuilder
    {
        public IWebHostEnvironment Environment { get; }
        public IServiceCollection Services { get; }
        public Configuration Configuration { get; }
        public ILoggingBuilder Logging { get; }

        // Ability to configure existing web host and host
        public ConfigureWebHostBuilder WebHost { get; }
        public ConfigureHostBuilder Host { get; }

        public WebApplication Build();
    }

    public sealed class Configuration : IConfigurationRoot, IConfigurationBuilder { }

    // The .Build() methods are explicitly implemented interface method that throw NotSupportedExceptions
    public sealed class ConfigureHostBuilder : IHostBuilder { }
    public sealed class ConfigureWebHostBuilder : IWebHostBuilder { }

    public sealed class WebApplication : IHost, IApplicationBuilder, IEndpointRouteBuilder, IAsyncDisposable
    {
        // Top level properties to access common services
        public ILogger Logger { get; }
        public ICollection<string> Urls { get; }
        public IHostApplicationLifetime Lifetime { get; }
        public IServiceProvider Services { get; }
        public IConfiguration Configuration { get; }
        public IWebHostEnvironment Environment { get; }

        // Factory methods
        public static WebApplication Create(string[]? args = null);
        public static WebApplicationBuilder CreateBuilder(string[]? args = null);

        // Methods used to start the host
        public void Run(string? url = nul);
        public Task RunAsync(string? url = null);
        public Task StartAsync(CancellationToken cancellationToken = default);
        public Task StopAsync(CancellationToken cancellationToken = default);

        public ValueTask DisposeAsync();
    }
}