namespace ForumSystem.Web
{
    using Microsoft.AspNetCore.Hosting;
    using Microsoft.Azure.KeyVault;
    using Microsoft.Azure.Services.AppAuthentication;
    using Microsoft.Extensions.Configuration;
    using Microsoft.Extensions.Configuration.AzureKeyVault;
    using Microsoft.Extensions.Hosting;

    public static class Program
    {
        public static void Main(string[] args)
        {
            CreateHostBuilder(args).Build().Run();
        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureAppConfiguration(
                    (ctx, builder) =>
                    {
                        var keyVaultEndpoint = GetKeyVaultEndpoint();
                        if (!string.IsNullOrEmpty(keyVaultEndpoint))
                        {
                            var azureServiceTokenProvider = new AzureServiceTokenProvider("RunAs=App;");
                            var keyVaultClient = new KeyVaultClient(
                                new KeyVaultClient.AuthenticationCallback(
                                    azureServiceTokenProvider.KeyVaultTokenCallback));
                            builder.AddAzureKeyVault(
                                keyVaultEndpoint, keyVaultClient, new DefaultKeyVaultSecretManager());
                        }
                    })
                .ConfigureWebHostDefaults(
                    webBuilder => { webBuilder.UseStartup<Startup>(); });

        private static string GetKeyVaultEndpoint() => "https://somethingRandmom.vault.azure.net/";
    }
}