// 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.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Threading.Tasks.Dataflow;
using System.Xml;
using Microsoft.Build.Execution;
using Microsoft.Build.Framework;
using Microsoft.Build.Framework.XamlTypes;
using Microsoft.VisualStudio.Composition;
using Microsoft.VisualStudio.ProjectSystem;
using Microsoft.VisualStudio.ProjectSystem.Build;
using Microsoft.VisualStudio.ProjectSystem.Properties;
using Microsoft.VisualStudio.ProjectSystem.References;
using Microsoft.VisualStudio.Threading;
using Moq;

namespace Microsoft.CodeAnalysis.Razor.ProjectSystem
{
    internal class TestProjectSystemServices : IUnconfiguredProjectCommonServices
    {
        public TestProjectSystemServices(string fullPath, params TestPropertyData[] data)
        {
            ProjectService = new TestProjectService();
            ThreadingService = ProjectService.Services.ThreadingPolicy;

            UnconfiguredProject = new TestUnconfiguredProject(ProjectService, fullPath);
            ProjectService.LoadedUnconfiguredProjects.Add(UnconfiguredProject);

            ActiveConfiguredProject = new TestConfiguredProject(UnconfiguredProject, data);
            UnconfiguredProject.LoadedConfiguredProjects.Add(ActiveConfiguredProject);

            ActiveConfiguredProjectAssemblyReferences = new TestAssemblyReferencesService();
            ActiveConfiguredProjectRazorProperties = new Rules.RazorProjectProperties(ActiveConfiguredProject, UnconfiguredProject);
            ActiveConfiguredProjectSubscription = new TestActiveConfiguredProjectSubscriptionService();

            TasksService = new TestProjectAsynchronousTasksService(ProjectService, UnconfiguredProject, ActiveConfiguredProject);
        }

        public TestProjectServices Services { get; }

        public TestProjectService ProjectService { get; }

        public TestUnconfiguredProject UnconfiguredProject { get; }

        public TestConfiguredProject ActiveConfiguredProject { get; }

        public TestAssemblyReferencesService ActiveConfiguredProjectAssemblyReferences { get; }

        public Rules.RazorProjectProperties ActiveConfiguredProjectRazorProperties { get; }

        public TestActiveConfiguredProjectSubscriptionService ActiveConfiguredProjectSubscription { get; }

        public TestProjectAsynchronousTasksService TasksService { get; }

        public TestThreadingService ThreadingService { get; }

        ConfiguredProject IUnconfiguredProjectCommonServices.ActiveConfiguredProject => ActiveConfiguredProject;

        IAssemblyReferencesService IUnconfiguredProjectCommonServices.ActiveConfiguredProjectAssemblyReferences => ActiveConfiguredProjectAssemblyReferences;

        IPackageReferencesService IUnconfiguredProjectCommonServices.ActiveConfiguredProjectPackageReferences => throw new NotImplementedException();

        Rules.RazorProjectProperties IUnconfiguredProjectCommonServices.ActiveConfiguredProjectRazorProperties => ActiveConfiguredProjectRazorProperties;

        IActiveConfiguredProjectSubscriptionService IUnconfiguredProjectCommonServices.ActiveConfiguredProjectSubscription => ActiveConfiguredProjectSubscription;

        IProjectAsynchronousTasksService IUnconfiguredProjectCommonServices.TasksService => TasksService;

        IProjectThreadingService IUnconfiguredProjectCommonServices.ThreadingService => ThreadingService;

        UnconfiguredProject IUnconfiguredProjectCommonServices.UnconfiguredProject => UnconfiguredProject;

        public IProjectVersionedValue<IProjectSubscriptionUpdate> CreateUpdate(params TestProjectChangeDescription[] descriptions)
        {
            return new ProjectVersionedValue<IProjectSubscriptionUpdate>(
                value: new ProjectSubscriptionUpdate(
                    projectChanges: descriptions.ToImmutableDictionary(d => d.After.RuleName, d => (IProjectChangeDescription)d),
                    projectConfiguration: ActiveConfiguredProject.ProjectConfiguration),
                dataSourceVersions: ImmutableDictionary<NamedIdentity, IComparable>.Empty);
        }

        public class TestProjectServices : IProjectServices
        {
            public TestProjectServices(TestProjectService projectService)
            {
                ProjectService = projectService;
                ThreadingPolicy = new TestThreadingService();
            }

            public TestProjectService ProjectService { get; }

            public TestThreadingService ThreadingPolicy { get; }

            IProjectLockService IProjectServices.ProjectLockService => throw new NotImplementedException();

            IProjectThreadingService IProjectServices.ThreadingPolicy => ThreadingPolicy;

            IProjectFaultHandlerService IProjectServices.FaultHandler => throw new NotImplementedException();

            IProjectReloader IProjectServices.ProjectReloader => throw new NotImplementedException();

            ExportProvider IProjectCommonServices.ExportProvider => throw new NotImplementedException();

            IProjectDataSourceRegistry IProjectCommonServices.DataSourceRegistry => throw new NotImplementedException();

            IProjectService IProjectCommonServices.ProjectService => ProjectService;

            IProjectCapabilitiesScope IProjectCommonServices.Capabilities => throw new NotImplementedException();
        }

        public class TestProjectService : IProjectService
        {
            public TestProjectService()
            {
                LoadedUnconfiguredProjects = new List<TestUnconfiguredProject>();
                Services = new TestProjectServices(this);
            }

            public List<TestUnconfiguredProject> LoadedUnconfiguredProjects { get; }

            public TestProjectServices Services { get; }

            IEnumerable<UnconfiguredProject> IProjectService.LoadedUnconfiguredProjects => throw new NotImplementedException();

            IProjectServices IProjectService.Services => Services;

            IProjectCapabilitiesScope IProjectService.Capabilities => throw new NotImplementedException();

            Task<UnconfiguredProject> IProjectService.LoadProjectAsync(string projectLocation, IImmutableSet<string> projectCapabilities)
            {
                throw new NotImplementedException();
            }

            Task<UnconfiguredProject> IProjectService.LoadProjectAsync(XmlReader reader, IImmutableSet<string> projectCapabilities)
            {
                throw new NotImplementedException();
            }

            Task<UnconfiguredProject> IProjectService.LoadProjectAsync(string projectLocation, bool delayAutoLoad, IImmutableSet<string> projectCapabilities)
            {
                throw new NotImplementedException();
            }

            Task IProjectService.UnloadProjectAsync(UnconfiguredProject project)
            {
                throw new NotImplementedException();
            }
        }

        public class TestUnconfiguredProject : UnconfiguredProject
        {
            public TestUnconfiguredProject(TestProjectService projectService, string fullPath)
            {
                ProjectService = projectService;
                FullPath = fullPath;

                LoadedConfiguredProjects = new List<TestConfiguredProject>();
            }

            public TestProjectService ProjectService { get; }

            public string FullPath { get; set; }

            public List<TestConfiguredProject> LoadedConfiguredProjects { get; }

            string UnconfiguredProject.FullPath => FullPath;
            bool UnconfiguredProject.RequiresReloadForExternalFileChange => throw new NotImplementedException();

            IProjectCapabilitiesScope UnconfiguredProject.Capabilities => throw new NotImplementedException();

            IProjectService UnconfiguredProject.ProjectService => ProjectService;

            IUnconfiguredProjectServices UnconfiguredProject.Services => throw new NotImplementedException();

            IEnumerable<ConfiguredProject> UnconfiguredProject.LoadedConfiguredProjects => LoadedConfiguredProjects;

            bool UnconfiguredProject.IsLoading => throw new NotImplementedException();

            event AsyncEventHandler UnconfiguredProject.ProjectUnloading
            {
                add
                {
                    throw new NotImplementedException();
                }

                remove
                {
                    throw new NotImplementedException();
                }
            }

            event AsyncEventHandler<ProjectRenamedEventArgs> UnconfiguredProject.ProjectRenaming
            {
                add
                {
                }

                remove
                {
                }
            }

            event AsyncEventHandler<ProjectRenamedEventArgs> UnconfiguredProject.ProjectRenamedOnWriter
            {
                add
                {
                    throw new NotImplementedException();
                }

                remove
                {
                    throw new NotImplementedException();
                }
            }

            event AsyncEventHandler<ProjectRenamedEventArgs> UnconfiguredProject.ProjectRenamed
            {
                add
                {
                    throw new NotImplementedException();
                }

                remove
                {
                    throw new NotImplementedException();
                }
            }

            Task<bool> UnconfiguredProject.CanRenameAsync(string newFilePath)
            {
                throw new NotImplementedException();
            }

            Task<Encoding> UnconfiguredProject.GetFileEncodingAsync()
            {
                throw new NotImplementedException();
            }

            Task<bool> UnconfiguredProject.GetIsDirtyAsync()
            {
                throw new NotImplementedException();
            }

            Task<ConfiguredProject> UnconfiguredProject.GetSuggestedConfiguredProjectAsync()
            {
                throw new NotImplementedException();
            }

            Task<ConfiguredProject> UnconfiguredProject.LoadConfiguredProjectAsync(string name, IImmutableDictionary<string, string> configurationProperties)
            {
                throw new NotImplementedException();
            }

            Task<ConfiguredProject> UnconfiguredProject.LoadConfiguredProjectAsync(ProjectConfiguration projectConfiguration)
            {
                throw new NotImplementedException();
            }

            Task UnconfiguredProject.ReloadAsync(bool immediately)
            {
                throw new NotImplementedException();
            }

            Task UnconfiguredProject.RenameAsync(string newFilePath)
            {
                throw new NotImplementedException();
            }

            Task UnconfiguredProject.SaveAsync(string filePath)
            {
                throw new NotImplementedException();
            }

            Task UnconfiguredProject.SaveCopyAsync(string filePath, Encoding fileEncoding)
            {
                throw new NotImplementedException();
            }

            Task UnconfiguredProject.SaveUserFileAsync()
            {
                throw new NotImplementedException();
            }

            Task UnconfiguredProject.SetFileEncodingAsync(Encoding value)
            {
                throw new NotImplementedException();
            }
        }

        public class TestConfiguredProject : ConfiguredProject
        {
            public TestConfiguredProject(TestUnconfiguredProject unconfiguredProject, TestPropertyData[] data)
            {
                UnconfiguredProject = unconfiguredProject;
                Services = new TestConfiguredProjectServices(this, data);

                ProjectConfiguration = new StandardProjectConfiguration(
                    "Debug|AnyCPU",
                    ImmutableDictionary<string, string>.Empty.Add("Configuration", "Debug").Add("Platform", "AnyCPU"));
            }

            public TestUnconfiguredProject UnconfiguredProject { get; }

            public ProjectConfiguration ProjectConfiguration { get; }

            public TestConfiguredProjectServices Services { get; }

            IComparable ConfiguredProject.ProjectVersion => throw new NotImplementedException();

            IReceivableSourceBlock<IComparable> ConfiguredProject.ProjectVersionBlock => throw new NotImplementedException();

            ProjectConfiguration ConfiguredProject.ProjectConfiguration => ProjectConfiguration;

            IProjectCapabilitiesScope ConfiguredProject.Capabilities => throw new NotImplementedException();

            UnconfiguredProject ConfiguredProject.UnconfiguredProject => UnconfiguredProject;

            IConfiguredProjectServices ConfiguredProject.Services => Services;

            event AsyncEventHandler ConfiguredProject.ProjectUnloading
            {
                add
                {
                    throw new NotImplementedException();
                }

                remove
                {
                    throw new NotImplementedException();
                }
            }

            event EventHandler ConfiguredProject.ProjectChanged
            {
                add
                {
                    throw new NotImplementedException();
                }

                remove
                {
                    throw new NotImplementedException();
                }
            }

            event EventHandler ConfiguredProject.ProjectChangedSynchronous
            {
                add
                {
                    throw new NotImplementedException();
                }

                remove
                {
                    throw new NotImplementedException();
                }
            }

            void ConfiguredProject.NotifyProjectChange()
            {
                throw new NotImplementedException();
            }
        }

        public class TestConfiguredProjectServices : IConfiguredProjectServices
        {
            public TestConfiguredProjectServices(TestConfiguredProject configuredProject, TestPropertyData[] data)
            {
                ConfiguredProject = configuredProject;

                AdditionalRuleDefinitions = new TestAdditionalRuleDefinitionsService();
                PropertyPagesCatalog = new TestPropertyPagesCatalogProvider(new TestPropertyPagesCatalog(data));
            }

            public TestConfiguredProject ConfiguredProject { get; }

            public TestAdditionalRuleDefinitionsService AdditionalRuleDefinitions { get; }

            public TestPropertyPagesCatalogProvider PropertyPagesCatalog { get; }

            IOutputGroupsService IConfiguredProjectServices.OutputGroups => throw new NotImplementedException();

            IBuildProject IConfiguredProjectServices.Build => throw new NotImplementedException();

            IBuildSupport IConfiguredProjectServices.BuildSupport => throw new NotImplementedException();

            IAssemblyReferencesService IConfiguredProjectServices.AssemblyReferences => throw new NotImplementedException();

            IComReferencesService IConfiguredProjectServices.ComReferences => throw new NotImplementedException();

            ISdkReferencesService IConfiguredProjectServices.SdkReferences => throw new NotImplementedException();

            IPackageReferencesService IConfiguredProjectServices.PackageReferences => throw new NotImplementedException();

            IWinRTReferencesService IConfiguredProjectServices.WinRTReferences => throw new NotImplementedException();

            IBuildDependencyProjectReferencesService IConfiguredProjectServices.ProjectReferences => throw new NotImplementedException();

            IProjectItemProvider IConfiguredProjectServices.SourceItems => throw new NotImplementedException();

            IProjectPropertiesProvider IConfiguredProjectServices.ProjectPropertiesProvider => throw new NotImplementedException();

            IProjectPropertiesProvider IConfiguredProjectServices.UserPropertiesProvider => throw new NotImplementedException();

            IProjectAsynchronousTasksService IConfiguredProjectServices.ProjectAsynchronousTasks => throw new NotImplementedException();

            IAdditionalRuleDefinitionsService IConfiguredProjectServices.AdditionalRuleDefinitions => AdditionalRuleDefinitions;

            IPropertyPagesCatalogProvider IConfiguredProjectServices.PropertyPagesCatalog => PropertyPagesCatalog;

            IProjectSubscriptionService IConfiguredProjectServices.ProjectSubscription => throw new NotImplementedException();

            IProjectSnapshotService IConfiguredProjectServices.ProjectSnapshotService => throw new NotImplementedException();

            object IConfiguredProjectServices.HostObject => throw new NotImplementedException();

            ExportProvider IProjectCommonServices.ExportProvider => throw new NotImplementedException();

            IProjectDataSourceRegistry IProjectCommonServices.DataSourceRegistry => throw new NotImplementedException();

            IProjectService IProjectCommonServices.ProjectService => ConfiguredProject.UnconfiguredProject.ProjectService;

            IProjectCapabilitiesScope IProjectCommonServices.Capabilities => throw new NotImplementedException();
        }

        public class TestAdditionalRuleDefinitionsService : IAdditionalRuleDefinitionsService
        {
            IProjectVersionedValue<IAdditionalRuleDefinitions> IAdditionalRuleDefinitionsService.AdditionalRuleDefinitions => throw new NotImplementedException();

            IReceivableSourceBlock<IProjectVersionedValue<IAdditionalRuleDefinitions>> IProjectValueDataSource<IAdditionalRuleDefinitions>.SourceBlock => throw new NotImplementedException();

            ISourceBlock<IProjectVersionedValue<object>> IProjectValueDataSource.SourceBlock => throw new NotImplementedException();

            NamedIdentity IProjectValueDataSource.DataSourceKey => throw new NotImplementedException();

            IComparable IProjectValueDataSource.DataSourceVersion => throw new NotImplementedException();

            bool IAdditionalRuleDefinitionsService.AddRuleDefinition(string path, string context)
            {
                return false;
            }

            bool IAdditionalRuleDefinitionsService.AddRuleDefinition(Rule rule, string context)
            {
                return false;
            }

            IDisposable IJoinableProjectValueDataSource.Join()
            {
                throw new NotImplementedException();
            }

            bool IAdditionalRuleDefinitionsService.RemoveRuleDefinition(string path)
            {
                return false;
            }

            bool IAdditionalRuleDefinitionsService.RemoveRuleDefinition(Rule rule)
            {
                return false;
            }
        }

        public class TestPropertyPagesCatalogProvider : IPropertyPagesCatalogProvider
        {
            public TestPropertyPagesCatalogProvider(TestPropertyPagesCatalog catalog)
            {
                Catalog = catalog;
                CatalogsByContext = new Dictionary<string, IPropertyPagesCatalog>()
                {
                    { "Project", catalog },
                };
            }

            public TestPropertyPagesCatalog Catalog { get; }

            public Dictionary<string, IPropertyPagesCatalog> CatalogsByContext { get; }

            public IReceivableSourceBlock<IProjectVersionedValue<IProjectCatalogSnapshot>> SourceBlock => throw new NotImplementedException();

            public NamedIdentity DataSourceKey => throw new NotImplementedException();

            public IComparable DataSourceVersion => throw new NotImplementedException();

            ISourceBlock<IProjectVersionedValue<object>> IProjectValueDataSource.SourceBlock => throw new NotImplementedException();

            public Task<IPropertyPagesCatalog> GetCatalogAsync(string name, CancellationToken cancellationToken = default)
            {
                return Task.FromResult(CatalogsByContext[name]);
            }

            public Task<IImmutableDictionary<string, IPropertyPagesCatalog>> GetCatalogsAsync(CancellationToken cancellationToken = default)
            {
                return Task.FromResult<IImmutableDictionary<string, IPropertyPagesCatalog>>(CatalogsByContext.ToImmutableDictionary());
            }

            public IPropertyPagesCatalog GetMemoryOnlyCatalog(string context)
            {
                return Catalog;
            }

            public IDisposable Join()
            {
                throw new NotImplementedException();
            }
        }

        public class TestActiveConfiguredProjectSubscriptionService : IActiveConfiguredProjectSubscriptionService
        {
            public TestActiveConfiguredProjectSubscriptionService()
            {
                JointRuleBlock = new BufferBlock<IProjectVersionedValue<IProjectSubscriptionUpdate>>();
                JointRuleSource = new TestProjectValueDataSource<IProjectSubscriptionUpdate>(JointRuleBlock);
            }

            public BufferBlock<IProjectVersionedValue<IProjectSubscriptionUpdate>> JointRuleBlock { get; }

            public TestProjectValueDataSource<IProjectSubscriptionUpdate> JointRuleSource { get; }

            IReceivableSourceBlock<IProjectVersionedValue<IProjectSnapshot>> IProjectSubscriptionService.ProjectBlock => throw new NotImplementedException();

            IProjectValueDataSource<IProjectSnapshot> IProjectSubscriptionService.ProjectSource => throw new NotImplementedException();

            IProjectValueDataSource<IProjectImportTreeSnapshot> IProjectSubscriptionService.ImportTreeSource => throw new NotImplementedException();

            IProjectValueDataSource<IProjectSharedFoldersSnapshot> IProjectSubscriptionService.SharedFoldersSource => throw new NotImplementedException();

            IProjectValueDataSource<IImmutableDictionary<string, IOutputGroup>> IProjectSubscriptionService.OutputGroupsSource => throw new NotImplementedException();

            IReceivableSourceBlock<IProjectVersionedValue<IProjectCatalogSnapshot>> IProjectSubscriptionService.ProjectCatalogBlock => throw new NotImplementedException();

            IProjectValueDataSource<IProjectCatalogSnapshot> IProjectSubscriptionService.ProjectCatalogSource => throw new NotImplementedException();

            IReceivableSourceBlock<IProjectVersionedValue<IProjectSubscriptionUpdate>> IProjectSubscriptionService.ProjectRuleBlock => throw new NotImplementedException();

            IProjectValueDataSource<IProjectSubscriptionUpdate> IProjectSubscriptionService.ProjectRuleSource => throw new NotImplementedException();

            IReceivableSourceBlock<IProjectVersionedValue<IProjectSubscriptionUpdate>> IProjectSubscriptionService.ProjectBuildRuleBlock => throw new NotImplementedException();

            IProjectValueDataSource<IProjectSubscriptionUpdate> IProjectSubscriptionService.ProjectBuildRuleSource => throw new NotImplementedException();

            ISourceBlock<IProjectVersionedValue<IProjectSubscriptionUpdate>> IProjectSubscriptionService.JointRuleBlock => JointRuleBlock;

            IProjectValueDataSource<IProjectSubscriptionUpdate> IProjectSubscriptionService.JointRuleSource => JointRuleSource;

            IReceivableSourceBlock<IProjectVersionedValue<IProjectSubscriptionUpdate>> IProjectSubscriptionService.SourceItemsRuleBlock => throw new NotImplementedException();

            IProjectValueDataSource<IProjectSubscriptionUpdate> IProjectSubscriptionService.SourceItemsRuleSource => throw new NotImplementedException();

            IReceivableSourceBlock<IProjectVersionedValue<IImmutableSet<string>>> IProjectSubscriptionService.SourceItemRuleNamesBlock => throw new NotImplementedException();

            IProjectValueDataSource<IImmutableSet<string>> IProjectSubscriptionService.SourceItemRuleNamesSource => throw new NotImplementedException();
        }

        public class TestProjectValueDataSource<T> : IProjectValueDataSource<T>
        {
            public TestProjectValueDataSource(BufferBlock<IProjectVersionedValue<T>> sourceBlock)
            {
                SourceBlock = sourceBlock;
            }

            public BufferBlock<IProjectVersionedValue<T>> SourceBlock { get; }

            IReceivableSourceBlock<IProjectVersionedValue<T>> IProjectValueDataSource<T>.SourceBlock => SourceBlock;

            ISourceBlock<IProjectVersionedValue<object>> IProjectValueDataSource.SourceBlock => throw new NotImplementedException();

            NamedIdentity IProjectValueDataSource.DataSourceKey => throw new NotImplementedException();

            IComparable IProjectValueDataSource.DataSourceVersion => throw new NotImplementedException();

            IDisposable IJoinableProjectValueDataSource.Join()
            {
                throw new NotImplementedException();
            }
        }

        public class TestPropertyPagesCatalog : IPropertyPagesCatalog
        {
            private readonly Dictionary<string, IRule> _data;

            public TestPropertyPagesCatalog(TestPropertyData[] data)
            {
                _data = new Dictionary<string, IRule>();
                foreach (var category in data.GroupBy(p => p.Category))
                {
                    _data.Add(
                        category.Key,
                        CreateRule(category.Select(property => CreateProperty(property.PropertyName, property.Value, property.SetValues))));
                }
            }

            private static IRule CreateRule(IEnumerable<IProperty> properties)
            {
                var rule = new Mock<IRule>();
                rule
                    .Setup(o => o.GetProperty(It.IsAny<string>()))
                    .Returns((string propertyName) =>
                    {

                        return properties.FirstOrDefault(p => p.Name == propertyName);
                    });

                return rule.Object;
            }

            private static IProperty CreateProperty(string name, object value, List<object> setValues = null)
            {
                var property = new Mock<IProperty>();
                property.SetupGet(o => o.Name)
                        .Returns(name);

                property.Setup(o => o.GetValueAsync())
                        .ReturnsAsync(value);

                property.As<IEvaluatedProperty>().Setup(p => p.GetEvaluatedValueAtEndAsync()).ReturnsAsync(value.ToString());
                property.As<IEvaluatedProperty>().Setup(p => p.GetEvaluatedValueAsync()).ReturnsAsync(value.ToString());

                if (setValues != null)
                {
                    property
                        .Setup(p => p.SetValueAsync(It.IsAny<object>()))
                        .Callback<object>(obj => setValues.Add(obj))
                        .Returns(() => Task.CompletedTask);
                }

                return property.Object;
            }

            IRule IPropertyPagesCatalog.BindToContext(string schemaName, string file, string itemType, string itemName)
            {
                _data.TryGetValue(schemaName, out var value);
                return value;
            }

            IRule IPropertyPagesCatalog.BindToContext(string schemaName, IProjectPropertiesContext context)
            {
                throw new NotImplementedException();
            }

            IRule IPropertyPagesCatalog.BindToContext(string schemaName, ProjectInstance projectInstance, string itemType, string itemName)
            {
                throw new NotImplementedException();
            }

            IRule IPropertyPagesCatalog.BindToContext(string schemaName, ProjectInstance projectInstance, ITaskItem taskItem)
            {
                throw new NotImplementedException();
            }

            IReadOnlyCollection<string> IPropertyPagesCatalog.GetProjectLevelPropertyPagesSchemas()
            {
                throw new NotImplementedException();
            }

            IReadOnlyCollection<string> IPropertyPagesCatalog.GetPropertyPagesSchemas()
            {
                throw new NotImplementedException();
            }

            IReadOnlyCollection<string> IPropertyPagesCatalog.GetPropertyPagesSchemas(string itemType)
            {
                throw new NotImplementedException();
            }

            IReadOnlyCollection<string> IPropertyPagesCatalog.GetPropertyPagesSchemas(IEnumerable<string> paths)
            {
                throw new NotImplementedException();
            }

            Rule IPropertyPagesCatalog.GetSchema(string schemaName)
            {
                throw new NotImplementedException();
            }
        }

        public class TestAssemblyReferencesService : IAssemblyReferencesService
        {
            public TestAssemblyReferencesService()
            {
                ResolvedReferences = new List<IAssemblyReference>();
            }

            public List<IAssemblyReference> ResolvedReferences { get; }

            Task<AddReferenceResult<IUnresolvedAssemblyReference>> IAssemblyReferencesService.AddAsync(AssemblyName assemblyName, string assemblyPath)
            {
                throw new NotImplementedException();
            }

            Task<bool> IAssemblyReferencesService.CanResolveAsync(AssemblyName assemblyName, string assemblyPath)
            {
                throw new NotImplementedException();
            }

            Task<bool> IAssemblyReferencesService.ContainsAsync(AssemblyName assemblyName, string assemblyPath)
            {
                throw new NotImplementedException();
            }

            Task<IAssemblyReference> IAssemblyReferencesService.GetResolvedReferenceAsync(AssemblyName assemblyName, string assemblyPath)
            {
                throw new NotImplementedException();
            }

            Task<IAssemblyReference> IResolvableReferencesService<IUnresolvedAssemblyReference, IAssemblyReference>.GetResolvedReferenceAsync(IUnresolvedAssemblyReference unresolvedReference)
            {
                throw new NotImplementedException();
            }

            Task<IImmutableSet<IAssemblyReference>> IResolvableReferencesService<IUnresolvedAssemblyReference, IAssemblyReference>.GetResolvedReferencesAsync()
            {
                return Task.FromResult<IImmutableSet<IAssemblyReference>>(ResolvedReferences.ToImmutableHashSet());
            }

            Task<IUnresolvedAssemblyReference> IAssemblyReferencesService.GetUnresolvedReferenceAsync(AssemblyName assemblyName, string assemblyPath)
            {
                throw new NotImplementedException();
            }

            Task<IUnresolvedAssemblyReference> IResolvableReferencesService<IUnresolvedAssemblyReference, IAssemblyReference>.GetUnresolvedReferenceAsync(IAssemblyReference resolvedReference)
            {
                throw new NotImplementedException();
            }

            Task<IImmutableSet<IUnresolvedAssemblyReference>> IResolvableReferencesService<IUnresolvedAssemblyReference, IAssemblyReference>.GetUnresolvedReferencesAsync()
            {
                throw new NotImplementedException();
            }

            Task IAssemblyReferencesService.RemoveAsync(AssemblyName assemblyName, string assemblyPath)
            {
                throw new NotImplementedException();
            }

            Task IResolvableReferencesService<IUnresolvedAssemblyReference, IAssemblyReference>.RemoveAsync(IUnresolvedAssemblyReference reference)
            {
                throw new NotImplementedException();
            }

            Task IResolvableReferencesService<IUnresolvedAssemblyReference, IAssemblyReference>.RemoveAsync(IEnumerable<IUnresolvedAssemblyReference> references)
            {
                throw new NotImplementedException();
            }
        }

        public class TestProjectAsynchronousTasksService : IProjectAsynchronousTasksService, IProjectContext
        {
            public CancellationToken UnloadCancellationToken => CancellationToken.None;

            public TestProjectAsynchronousTasksService(
                IProjectService projectService,
                UnconfiguredProject unconfiguredProject,
                ConfiguredProject configuredProject)
            {
                ProjectService = projectService;
                UnconfiguredProject = unconfiguredProject;
                ConfiguredProject = configuredProject;
            }

            public IProjectService ProjectService { get; }

            public UnconfiguredProject UnconfiguredProject { get; }

            public ConfiguredProject ConfiguredProject { get; }

            public Task DrainCriticalTaskQueueAsync(bool drainCurrentQueueOnly = false, bool throwExceptions = false, CancellationToken cancellationToken = default)
            {
                throw new NotImplementedException();
            }

            public Task DrainTaskQueueAsync(bool drainCurrentQueueOnly = false, bool throwExceptions = false, CancellationToken cancellationToken = default)
            {
                throw new NotImplementedException();
            }

            public Task DrainTaskQueueAsync(ProjectCriticalOperation operation, bool drainCurrentQueueOnly = false, bool throwExceptions = false, CancellationToken cancellationToken = default)
            {
                throw new NotImplementedException();
            }

            public bool IsTaskQueueEmpty(ProjectCriticalOperation projectCriticalOperation)
            {
                throw new NotImplementedException();
            }

            public void RegisterAsyncTask(JoinableTask joinableTask, bool registerFaultHandler = false)
            {
            }

            public void RegisterAsyncTask(Task task, bool registerFaultHandler = false)
            {
            }

            public void RegisterAsyncTask(JoinableTask joinableTask, ProjectCriticalOperation operationFlags, bool registerFaultHandler = false)
            {
            }

            public void RegisterCriticalAsyncTask(JoinableTask joinableTask, bool registerFaultHandler = false)
            {
            }
        }

        public class TestThreadingService : IProjectThreadingService
        {
            public TestThreadingService()
            {
                JoinableTaskContext = new JoinableTaskContextNode(new JoinableTaskContext());
                JoinableTaskFactory = new JoinableTaskFactory(JoinableTaskContext.Context);
            }

            public JoinableTaskContextNode JoinableTaskContext { get; }

            public JoinableTaskFactory JoinableTaskFactory { get; }

            public bool IsOnMainThread => throw new NotImplementedException();

            public void ExecuteSynchronously(Func<Task> asyncAction)
            {
                asyncAction().GetAwaiter().GetResult();
            }

            public T ExecuteSynchronously<T>(Func<Task<T>> asyncAction)
            {
                return asyncAction().GetAwaiter().GetResult();
            }

            public void Fork(
                Func<Task> asyncAction,
                JoinableTaskFactory factory = null,
                UnconfiguredProject unconfiguredProject = null,
                ConfiguredProject configuredProject = null,
                ErrorReportSettings watsonReportSettings = null,
                ProjectFaultSeverity faultSeverity = ProjectFaultSeverity.Recoverable,
                ForkOptions options = ForkOptions.Default)
            {
                throw new NotImplementedException();
            }

            public IDisposable SuppressProjectExecutionContext()
            {
                throw new NotImplementedException();
            }

            public void VerifyOnUIThread()
            {
                if (!JoinableTaskContext.IsOnMainThread)
                {
                    throw new InvalidOperationException("This isn't the main thread.");
                }
            }
        }
    }
}