using System.Linq;
using System.Security.Claims;
using Owin;
using Sitecore.Abstractions;
using Sitecore.Diagnostics;
using Sitecore.Owin.Authentication.Configuration;
using Sitecore.Owin.Pipelines.Initialize;
using Custom.Owin.Authentication.Extensions;

namespace Custom.Owin.Authentication.Samples.Pipelines.Initialize
{
  public class ShowUserAuthType : InitializeProcessor
  {
    public ShowUserAuthType(BaseSiteContextFactory siteContextFactory,
        FederatedAuthenticationConfiguration federatedAuthenticationConfiguration)
    {
      this.FederatedAuthenticationConfiguration = federatedAuthenticationConfiguration;
      this.SiteContextFactory = siteContextFactory;
    }

    protected FederatedAuthenticationConfiguration FederatedAuthenticationConfiguration { get; }

    protected BaseSiteContextFactory SiteContextFactory { get; }

    public override void Process([Sitecore.Annotations.NotNull] InitializeArgs args)
    {
      Assert.ArgumentNotNull(args, nameof(args));

      foreach (var virtualFolder in this.SiteContextFactory.GetSites().Select(site => site.VirtualFolder).Distinct())
      {
        if (string.IsNullOrEmpty(virtualFolder))
        {
          continue;
        }

        args.App.MapEx(virtualFolder + "user", builder =>
        {
          builder.Run(async context =>
          {
            string authenticationType = null;
            string identityProviderName = null;
            string claims = null;
            if (Sitecore.Context.User.Identity is ClaimsIdentity claimsIdentity)
            {
              authenticationType = claimsIdentity.AuthenticationType;
              identityProviderName = this.FederatedAuthenticationConfiguration.GetIdentityProvider(claimsIdentity)?.Name;
              claims = "<table>" + claimsIdentity.Claims.Select(claim => $"<tr><td>{claim.Type}</td><td>{claim.Value}</td></tr>").Aggregate((s, s1) => s + s1) + "</table>";
            }

            string output =
                $"username: {Sitecore.Context.GetUserName()}<br/><br/>" +
                $"authenticationType: {authenticationType}<br/>" +
                $"idp: {identityProviderName}<br/>" +
                $"site: {Sitecore.Context.Site.Name}<br/>" +
                $"mode: {Sitecore.Context.Site.DisplayMode}<br/><br/>" +
                $"IsAdministrator: {Sitecore.Context.User.IsAdministrator}<br/>" +
                $"IsVirtual: {Sitecore.Context.User.RuntimeSettings.IsVirtual}<br/>" +
                $"claims: {claims}";

            context.Response.ContentType = "text/html";
            await context.Response.WriteAsync(output).ConfigureAwait(false);
          });
        });
      }
    }
  }
}