// Copyright (c) .NET Foundation. All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Server.IntegrationTesting;
using Microsoft.AspNetCore.Testing.xunit;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Testing;
using Xunit;
using Xunit.Abstractions;
using Xunit.Sdk;

namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
{
    public class NtlmAuthenticationTests : LoggedTest
    {
        public NtlmAuthenticationTests(ITestOutputHelper output) : base(output)
        {
        }

        public static TestMatrix TestVariants
            => TestMatrix.ForServers(ServerType.IISExpress)
                .WithTfms(Tfm.NetCoreApp22, Tfm.Net461)
                .WithAllAncmVersions();

        [ConditionalTheory]
        [MemberData(nameof(TestVariants))]
        public async Task NtlmAuthentication(TestVariant variant)
        {
            var testName = $"NtlmAuthentication_{variant.Tfm}_{variant.AncmVersion}";
            using (StartLog(out var loggerFactory, testName))
            {
                var logger = loggerFactory.CreateLogger("NtlmAuthenticationTest");

                var deploymentParameters = new DeploymentParameters(variant)
                {
                    ApplicationPath = Helpers.GetOutOfProcessTestSitesPath(),
                    ApplicationBaseUriHint = $"http://localhost:5052",
                    EnvironmentName = "NtlmAuthentication", // Will pick the Start class named 'StartupNtlmAuthentication'
                    ServerConfigTemplateContent = File.ReadAllText("AppHostConfig/NtlmAuthentation.config"),
                    SiteName = "NtlmAuthenticationTestSite", // This is configured in the NtlmAuthentication.config
                };

                using (var deployer = ApplicationDeployerFactory.Create(deploymentParameters, loggerFactory))
                {
                    var deploymentResult = await deployer.DeployAsync();
                    var httpClient = deploymentResult.HttpClient;
                    httpClient.Timeout = TimeSpan.FromSeconds(5);

                    // Request to base address and check if various parts of the body are rendered & measure the cold startup time.
                    var response = await RetryHelper.RetryRequest(() =>
                    {
                        return httpClient.GetAsync(string.Empty);
                    }, logger, deploymentResult.HostShutdownToken, retryCount: 30);

                    var responseText = await response.Content.ReadAsStringAsync();
                    try
                    {
                        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                        Assert.Equal("Hello World", responseText);

                        response = await httpClient.GetAsync("/Anonymous");
                        responseText = await response.Content.ReadAsStringAsync();
                        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                        Assert.Equal("Anonymous?True", responseText);

                        response = await httpClient.GetAsync("/Restricted");
                        responseText = await response.Content.ReadAsStringAsync();
                        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
                        Assert.Contains("NTLM", response.Headers.WwwAuthenticate.ToString());
                        Assert.Contains("Negotiate", response.Headers.WwwAuthenticate.ToString());

                        response = await httpClient.GetAsync("/RestrictedNTLM");
                        responseText = await response.Content.ReadAsStringAsync();
                        Assert.Equal(HttpStatusCode.Unauthorized, response.StatusCode);
                        Assert.Contains("NTLM", response.Headers.WwwAuthenticate.ToString());
                        // Note we can't restrict a challenge to a specific auth type, the native auth modules always add themselves.
                        Assert.Contains("Negotiate", response.Headers.WwwAuthenticate.ToString());

                        response = await httpClient.GetAsync("/Forbidden");
                        responseText = await response.Content.ReadAsStringAsync();
                        Assert.Equal(HttpStatusCode.Forbidden, response.StatusCode);

                        var httpClientHandler = new HttpClientHandler() { UseDefaultCredentials = true };
                        httpClient = deploymentResult.CreateHttpClient(httpClientHandler);

                        response = await httpClient.GetAsync("/Anonymous");
                        responseText = await response.Content.ReadAsStringAsync();
                        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                        Assert.Equal("Anonymous?True", responseText);

                        response = await httpClient.GetAsync("/Restricted");
                        responseText = await response.Content.ReadAsStringAsync();
                        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
                        Assert.NotEmpty(responseText);
                    }
                    catch (XunitException)
                    {
                        logger.LogWarning(response.ToString());
                        logger.LogWarning(responseText);
                        throw;
                    }
                }
            }
        }
    }
}