using System;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using Moq;
using NUnit.Framework;
using Umbraco.Cms.Core;
using Umbraco.Cms.Core.Cache;
using Umbraco.Cms.Core.Composing;
using Umbraco.Cms.Core.Configuration.Models;
using Umbraco.Cms.Core.DependencyInjection;
using Umbraco.Cms.Core.IO;
using Umbraco.Cms.Core.Scoping;
using Umbraco.Cms.Core.Services;
using Umbraco.Cms.Core.Strings;
using Umbraco.Cms.Core.Web;
using Umbraco.Cms.Infrastructure.DependencyInjection;
using Umbraco.Cms.Infrastructure.Persistence.Mappers;
using Umbraco.Cms.Infrastructure.Scoping;
using Umbraco.Cms.Tests.Common.Builders;
using Umbraco.Cms.Tests.Integration.DependencyInjection;
using Umbraco.Cms.Tests.Integration.Extensions;
using Umbraco.Extensions;

namespace Umbraco.Cms.Tests.Integration.Testing
{
    /// <summary>
    /// Abstract class for integration tests
    /// </summary>
    /// <remarks>
    /// This will use a Host Builder to boot and install Umbraco ready for use
    /// </remarks>
    public abstract class UmbracoIntegrationTest : UmbracoIntegrationTestBase
    {
        private IHost _host;

        protected IServiceProvider Services => _host.Services;

        [SetUp]
        public void Setup()
        {
            InMemoryConfiguration[Constants.Configuration.ConfigUnattended + ":" + nameof(UnattendedSettings.InstallUnattended)] = "true";
            IHostBuilder hostBuilder = CreateHostBuilder();

            _host = hostBuilder.Build();
            UseTestDatabase(_host.Services);
            _host.Start();

            if (TestOptions.Boot)
            {
                Services.GetRequiredService<IUmbracoContextFactory>().EnsureUmbracoContext();
            }
        }

        [TearDown]
        public void TearDownAsync() => _host.StopAsync();

        /// <summary>
        /// Create the Generic Host and execute startup ConfigureServices/Configure calls
        /// </summary>
        private IHostBuilder CreateHostBuilder()
        {
            IHostBuilder hostBuilder = Host.CreateDefaultBuilder()

                // IMPORTANT: We Cannot use UseStartup, there's all sorts of threads about this with testing. Although this can work
                // if you want to setup your tests this way, it is a bit annoying to do that as the WebApplicationFactory will
                // create separate Host instances. So instead of UseStartup, we just call ConfigureServices/Configure ourselves,
                // and in the case of the UmbracoTestServerTestBase it will use the ConfigureWebHost to Configure the IApplicationBuilder directly.
                .ConfigureAppConfiguration((context, configBuilder) =>
                {
                    context.HostingEnvironment = TestHelper.GetWebHostEnvironment();
                    configBuilder.Sources.Clear();
                    configBuilder.AddInMemoryCollection(InMemoryConfiguration);

                    Configuration = configBuilder.Build();
                })
                .ConfigureServices((_, services) =>
                {
                    ConfigureServices(services);
                    ConfigureTestServices(services);

                    if (!TestOptions.Boot)
                    {
                        // If boot is false, we don't want the CoreRuntime hosted service to start
                        // So we replace it with a Mock
                        services.AddUnique(Mock.Of<IRuntime>());
                    }
                });

            return hostBuilder;
        }

        protected void ConfigureServices(IServiceCollection services)
        {
            services.AddUnique(CreateLoggerFactory());
            services.AddSingleton(TestHelper.DbProviderFactoryCreator);
            services.AddTransient<TestUmbracoDatabaseFactoryProvider>();
            IWebHostEnvironment webHostEnvironment = TestHelper.GetWebHostEnvironment();
            services.AddRequiredNetCoreServices(TestHelper, webHostEnvironment);

            // We register this service because we need it for IRuntimeState, if we don't this breaks 900 tests
            services.AddSingleton<IConflictingRouteService, TestConflictingRouteService>();

            // Add it!
            Core.Hosting.IHostingEnvironment hostingEnvironment = TestHelper.GetHostingEnvironment();
            TypeLoader typeLoader = services.AddTypeLoader(
                GetType().Assembly,
                hostingEnvironment,
                TestHelper.ConsoleLoggerFactory,
                AppCaches.NoCache,
                Configuration,
                TestHelper.Profiler);
            var builder = new UmbracoBuilder(services, Configuration, typeLoader, TestHelper.ConsoleLoggerFactory, TestHelper.Profiler, AppCaches.NoCache, hostingEnvironment);

            builder.Services.AddLogger(hostingEnvironment, TestHelper.GetLoggingConfiguration(), Configuration);

            builder.AddConfiguration()
                .AddUmbracoCore()
                .AddWebComponents()
                .AddRuntimeMinifier()
                .AddBackOfficeAuthentication()
                .AddBackOfficeIdentity()
                .AddMembersIdentity()
                .AddExamine()
                .AddTestServices(TestHelper);

            if (TestOptions.Mapper)
            {
                // TODO: Should these just be called from within AddUmbracoCore/AddWebComponents?
                builder
                    .AddCoreMappingProfiles()
                    .AddWebMappingProfiles();
            }

            services.AddSignalR();
            services.AddMvc();

            CustomTestSetup(builder);

            builder.Build();
        }

        /// <summary>
        ///  Hook for altering UmbracoBuilder setup
        /// </summary>
        /// <remarks>
        /// Can also be used for registering test doubles.
        /// </remarks>
        protected virtual void CustomTestSetup(IUmbracoBuilder builder)
        {
        }

        /// <summary>
        ///  Hook for registering test doubles.
        /// </summary>
        protected virtual void ConfigureTestServices(IServiceCollection services)
        {
        }

        protected virtual T GetRequiredService<T>() => Services.GetRequiredService<T>();

        /// <summary>
        /// Gets the <see cref="IScopeProvider"/>
        /// </summary>
        protected IScopeProvider ScopeProvider => Services.GetRequiredService<IScopeProvider>();

        /// <summary>
        /// Gets the <see cref="IScopeAccessor"/>
        /// </summary>
        protected IScopeAccessor ScopeAccessor => Services.GetRequiredService<IScopeAccessor>();

        /// <summary>
        /// Gets the <see cref="ILoggerFactory"/>
        /// </summary>
        protected ILoggerFactory LoggerFactory => Services.GetRequiredService<ILoggerFactory>();

        protected AppCaches AppCaches => Services.GetRequiredService<AppCaches>();

        protected IIOHelper IOHelper => Services.GetRequiredService<IIOHelper>();

        protected IShortStringHelper ShortStringHelper => Services.GetRequiredService<IShortStringHelper>();

        protected GlobalSettings GlobalSettings => Services.GetRequiredService<IOptions<GlobalSettings>>().Value;

        protected IMapperCollection Mappers => Services.GetRequiredService<IMapperCollection>();

        protected UserBuilder UserBuilderInstance { get; } = new ();

        protected UserGroupBuilder UserGroupBuilderInstance { get; } = new ();
    }
}