//-----------------------------------------------------------------------
// <copyright file="WebServerClientAuthorizeTests.cs" company="Outercurve Foundation">
//     Copyright (c) Outercurve Foundation. All rights reserved.
// </copyright>
//-----------------------------------------------------------------------

namespace DotNetOpenAuth.Test.OAuth2 {
	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Net;
	using System.Net.Http;
	using System.Text;
	using System.Threading.Tasks;
	using DotNetOpenAuth.Messaging;
	using DotNetOpenAuth.OAuth2;
	using DotNetOpenAuth.OAuth2.ChannelElements;
	using DotNetOpenAuth.OAuth2.Messages;
	using Moq;
	using NUnit.Framework;

	[TestFixture]
	public class WebServerClientAuthorizeTests : OAuth2TestBase {
		[Test]
		public void AuthorizationCodeGrant() {
			var coordinator = new OAuth2Coordinator<WebServerClient>(
				AuthorizationServerDescription,
				AuthorizationServerMock,
				new WebServerClient(AuthorizationServerDescription),
				client => {
					var authState = new AuthorizationState(TestScopes) {
						Callback = ClientCallback,
					};
					client.PrepareRequestUserAuthorization(authState).Respond();
					var result = client.ProcessUserAuthorization();
					Assert.That(result.AccessToken, Is.Not.Null.And.Not.Empty);
					Assert.That(result.RefreshToken, Is.Not.Null.And.Not.Empty);
				},
				server => {
					var request = server.ReadAuthorizationRequest();
					Assert.That(request, Is.Not.Null);
					server.ApproveAuthorizationRequest(request, ResourceOwnerUsername);
					server.HandleTokenRequest().Respond();
				});
			coordinator.Run();
		}

		[Theory]
		public void ResourceOwnerPasswordCredentialGrant(bool anonymousClient) {
			var authHostMock = CreateAuthorizationServerMock();
			if (anonymousClient) {
				authHostMock.Setup(
					m =>
					m.IsAuthorizationValid(
						It.Is<IAuthorizationDescription>(
							d =>
							d.ClientIdentifier == null && d.User == ResourceOwnerUsername &&
							MessagingUtilities.AreEquivalent(d.Scope, TestScopes)))).Returns(true);
			}

			var coordinator = new OAuth2Coordinator<WebServerClient>(
				AuthorizationServerDescription,
				authHostMock.Object,
				new WebServerClient(AuthorizationServerDescription),
				client => {
					if (anonymousClient) {
						client.ClientIdentifier = null;
					}

					var authState = client.ExchangeUserCredentialForToken(ResourceOwnerUsername, ResourceOwnerPassword, TestScopes);
					Assert.That(authState.AccessToken, Is.Not.Null.And.Not.Empty);
					Assert.That(authState.RefreshToken, Is.Not.Null.And.Not.Empty);
				},
				server => {
					server.HandleTokenRequest().Respond();
				});
			coordinator.Run();
		}

		[Test]
		public void ClientCredentialGrant() {
			var authServer = CreateAuthorizationServerMock();
			authServer.Setup(
				a => a.IsAuthorizationValid(It.Is<IAuthorizationDescription>(d => d.User == null && d.ClientIdentifier == ClientId && MessagingUtilities.AreEquivalent(d.Scope, TestScopes))))
				.Returns(true);
			authServer.Setup(
				a => a.CheckAuthorizeClientCredentialsGrant(It.Is<IAccessTokenRequest>(d => d.ClientIdentifier == ClientId && MessagingUtilities.AreEquivalent(d.Scope, TestScopes))))
				.Returns<IAccessTokenRequest>(req => new AutomatedAuthorizationCheckResponse(req, true));
			var coordinator = new OAuth2Coordinator<WebServerClient>(
				AuthorizationServerDescription,
				authServer.Object,
				new WebServerClient(AuthorizationServerDescription),
				client => {
					var authState = client.GetClientAccessToken(TestScopes);
					Assert.That(authState.AccessToken, Is.Not.Null.And.Not.Empty);
					Assert.That(authState.RefreshToken, Is.Null);
				},
				server => {
					server.HandleTokenRequest().Respond();
				});
			coordinator.Run();
		}

		[Test]
		public void CreateAuthorizingHandlerBearer() {
			var client = new WebServerClient(AuthorizationServerDescription);
			string bearerToken = "mytoken";
			var tcs = new TaskCompletionSource<HttpResponseMessage>();
			var expectedResponse = new HttpResponseMessage();

			var mockHandler = new Mocks.MockHttpMessageHandler((req, ct) => {
				Assert.That(req.Headers.Authorization.Scheme, Is.EqualTo(Protocol.BearerHttpAuthorizationScheme));
				Assert.That(req.Headers.Authorization.Parameter, Is.EqualTo(bearerToken));
				tcs.SetResult(expectedResponse);
				return tcs.Task;
			});
			var applicator = client.CreateAuthorizingHandler("mytoken", mockHandler);
			var httpClient = new HttpClient(applicator);
			var actualResponse = httpClient.GetAsync("http://localhost/someMessage").Result;
			Assert.That(actualResponse, Is.SameAs(expectedResponse));
		}

		[Test]
		public void CreateAuthorizingHandlerAuthorization() {
			var client = new WebServerClient(AuthorizationServerDescription);
			string bearerToken = "mytoken";
			var authorization = new Mock<IAuthorizationState>();
			authorization.SetupGet(a => a.AccessToken).Returns(bearerToken);
			var tcs = new TaskCompletionSource<HttpResponseMessage>();
			var expectedResponse = new HttpResponseMessage();

			var mockHandler = new Mocks.MockHttpMessageHandler((req, ct) => {
				Assert.That(req.Headers.Authorization.Scheme, Is.EqualTo(Protocol.BearerHttpAuthorizationScheme));
				Assert.That(req.Headers.Authorization.Parameter, Is.EqualTo(bearerToken));
				tcs.SetResult(expectedResponse);
				return tcs.Task;
			});
			var applicator = client.CreateAuthorizingHandler(authorization.Object, mockHandler);
			var httpClient = new HttpClient(applicator);
			var actualResponse = httpClient.GetAsync("http://localhost/someMessage").Result;
			Assert.That(actualResponse, Is.SameAs(expectedResponse));
		}
	}
}