using Microsoft.AspNetCore.Http;
using Moq;
using Ocelot.Configuration;
using Ocelot.Configuration.Builder;
using Ocelot.DownstreamRouteFinder;
using Ocelot.DownstreamRouteFinder.UrlMatcher;
using Ocelot.Logging;
using Ocelot.Middleware;
using Ocelot.PathManipulation;
using Ocelot.PathManipulation.Middleware;
using Ocelot.Request.Middleware;
using Ocelot.Responses;
using Ocelot.Values;
using System.Collections.Generic;
using System.Net.Http;
using System.Security.Claims;
using System.Threading.Tasks;
using TestStack.BDDfy;
using Xunit;

namespace Ocelot.UnitTests.DownstreamPathManipulation
{
    public class ClaimsToDownstreamPathMiddlewareTests
    {
        private readonly Mock<IChangeDownstreamPathTemplate> _changePath;
        private Mock<IOcelotLoggerFactory> _loggerFactory;
        private Mock<IOcelotLogger> _logger;
        private ClaimsToDownstreamPathMiddleware _middleware;
        private DownstreamContext _downstreamContext;
        private OcelotRequestDelegate _next;

        public ClaimsToDownstreamPathMiddlewareTests()
        {
            _downstreamContext = new DownstreamContext(new DefaultHttpContext());
            _loggerFactory = new Mock<IOcelotLoggerFactory>();
            _logger = new Mock<IOcelotLogger>();
            _loggerFactory.Setup(x => x.CreateLogger<ClaimsToDownstreamPathMiddleware>()).Returns(_logger.Object);
            _next = context => Task.CompletedTask;
            _changePath = new Mock<IChangeDownstreamPathTemplate>();
            _downstreamContext.DownstreamRequest = new DownstreamRequest(new HttpRequestMessage(HttpMethod.Get, "http://test.com"));
            _middleware = new ClaimsToDownstreamPathMiddleware(_next, _loggerFactory.Object, _changePath.Object);
        }

        [Fact]
        public void should_call_add_queries_correctly()
        {
            var downstreamRoute = new DownstreamRoute(new List<PlaceholderNameAndValue>(),
                new ReRouteBuilder()
                    .WithDownstreamReRoute(new DownstreamReRouteBuilder()
                        .WithDownstreamPathTemplate("any old string")
                        .WithClaimsToDownstreamPath(new List<ClaimToThing>
                        {
                            new ClaimToThing("UserId", "Subject", "", 0),
                        })
                        .WithUpstreamHttpMethod(new List<string> { "Get" })
                        .Build())
                    .WithUpstreamHttpMethod(new List<string> { "Get" })
                    .Build());

            this.Given(x => x.GivenTheDownStreamRouteIs(downstreamRoute))
               .And(x => x.GivenTheChangeDownstreamPathReturnsOk())
               .When(x => x.WhenICallTheMiddleware())
               .Then(x => x.ThenChangeDownstreamPathIsCalledCorrectly())
               .BDDfy();

        }

        private void WhenICallTheMiddleware()
        {
            _middleware.Invoke(_downstreamContext).GetAwaiter().GetResult();
        }

        private void GivenTheChangeDownstreamPathReturnsOk()
        {
            _changePath
                .Setup(x => x.ChangeDownstreamPath(
                    It.IsAny<List<ClaimToThing>>(),
                    It.IsAny<IEnumerable<Claim>>(),
                    It.IsAny<DownstreamPathTemplate>(),
                    It.IsAny<List<PlaceholderNameAndValue>>()))
                .Returns(new OkResponse());
        }

        private void ThenChangeDownstreamPathIsCalledCorrectly()
        {
            _changePath
                .Verify(x => x.ChangeDownstreamPath(
                    It.IsAny<List<ClaimToThing>>(),
                    It.IsAny<IEnumerable<Claim>>(),
                    _downstreamContext.DownstreamReRoute.DownstreamPathTemplate,
                    _downstreamContext.TemplatePlaceholderNameAndValues), Times.Once);
        }

        private void GivenTheDownStreamRouteIs(DownstreamRoute downstreamRoute)
        {
            _downstreamContext.TemplatePlaceholderNameAndValues = downstreamRoute.TemplatePlaceholderNameAndValues;
            _downstreamContext.DownstreamReRoute = downstreamRoute.ReRoute.DownstreamReRoute[0];
        }

    }
}