using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Ocelot.Configuration.File;
using Shouldly;
using TestStack.BDDfy;
using Xunit;

namespace Ocelot.AcceptanceTests
{
    public class SslTests : IDisposable
    {
        private IWebHost _builder;
        private readonly Steps _steps;
        private string _downstreamPath;

        public SslTests()
        {
            _steps = new Steps();
        }

        [Fact]
        public void should_dangerous_accept_any_server_certificate_validator()
        {
            int port = 51129;

            var configuration = new FileConfiguration
            {
                ReRoutes = new List<FileReRoute>
                    {
                        new FileReRoute
                        {
                            DownstreamPathTemplate = "/",
                            DownstreamScheme = "https",
                            DownstreamHostAndPorts = new List<FileHostAndPort>
                            {
                                new FileHostAndPort
                                {
                                    Host = "localhost",
                                    Port = port,
                                }
                            },
                            UpstreamPathTemplate = "/",
                            UpstreamHttpMethod = new List<string> { "Get" },
                            DangerousAcceptAnyServerCertificateValidator = true
                        }
                    }
            };

            this.Given(x => x.GivenThereIsAServiceRunningOn($"https://localhost:{port}", "/", 200, "Hello from Laura", port))
                .And(x => _steps.GivenThereIsAConfiguration(configuration))
                .And(x => _steps.GivenOcelotIsRunning())
                .When(x => _steps.WhenIGetUrlOnTheApiGateway("/"))
                .Then(x => _steps.ThenTheStatusCodeShouldBe(HttpStatusCode.OK))
                .And(x => _steps.ThenTheResponseBodyShouldBe("Hello from Laura"))
                .BDDfy();
        }

        [Fact]
        public void should_not_dangerous_accept_any_server_certificate_validator()
        {
            int port = 52129;

            var configuration = new FileConfiguration
            {
                ReRoutes = new List<FileReRoute>
                    {
                        new FileReRoute
                        {
                            DownstreamPathTemplate = "/",
                            DownstreamScheme = "https",
                            DownstreamHostAndPorts = new List<FileHostAndPort>
                            {
                                new FileHostAndPort
                                {
                                    Host = "localhost",
                                    Port = port,
                                }
                            },
                            UpstreamPathTemplate = "/",
                            UpstreamHttpMethod = new List<string> { "Get" },
                            DangerousAcceptAnyServerCertificateValidator = false
                        }
                    }
            };

            this.Given(x => x.GivenThereIsAServiceRunningOn($"https://localhost:{port}", "/", 200, "Hello from Laura", port))
                .And(x => _steps.GivenThereIsAConfiguration(configuration))
                .And(x => _steps.GivenOcelotIsRunning())
                .When(x => _steps.WhenIGetUrlOnTheApiGateway("/"))
                .Then(x => _steps.ThenTheStatusCodeShouldBe(HttpStatusCode.InternalServerError))
                .BDDfy();
        }

        private void GivenThereIsAServiceRunningOn(string baseUrl, string basePath, int statusCode, string responseBody, int port)
        {
            _builder = new WebHostBuilder()
                .UseUrls(baseUrl)
                .UseKestrel(options =>
                {
                    options.Listen(IPAddress.Loopback, port, listenOptions =>
                    {
                        listenOptions.UseHttps("idsrv3test.pfx", "idsrv3test");
                    });
                })
                .UseContentRoot(Directory.GetCurrentDirectory())
                .Configure(app =>
                {
                    app.UsePathBase(basePath);
                    app.Run(async context =>
                    {   
                        _downstreamPath = !string.IsNullOrEmpty(context.Request.PathBase.Value) ? context.Request.PathBase.Value : context.Request.Path.Value;

                        if(_downstreamPath != basePath)
                        {
                            context.Response.StatusCode = statusCode;
                            await context.Response.WriteAsync("downstream path didnt match base path");
                        }
                        else
                        {
                            context.Response.StatusCode = statusCode;
                            await context.Response.WriteAsync(responseBody);
                        }
                    });
                })
                .Build();

            _builder.Start();
        }

        internal void ThenTheDownstreamUrlPathShouldBe(string expectedDownstreamPath)
        {
            _downstreamPath.ShouldBe(expectedDownstreamPath);
        }

        public void Dispose()
        {
            _builder?.Dispose();
            _steps.Dispose();
        }
    }
}