// 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.Linq;
using System.Text;
using Microsoft.AspNetCore.Razor.Language;
using Microsoft.CodeAnalysis.Host;
using Moq;
using Xunit;

namespace Microsoft.CodeAnalysis.Razor.ProjectSystem
{
    public class DocumentStateTest
    {
        public DocumentStateTest()
        {
            TagHelperResolver = new TestTagHelperResolver();

            HostServices = TestServices.Create(
                new IWorkspaceService[]
                {
                    new TestProjectSnapshotProjectEngineFactory(),
                },
                new ILanguageService[]
                {
                    TagHelperResolver,
                });

            HostProject = new HostProject("c:\\MyProject\\Test.csproj", FallbackRazorConfiguration.MVC_2_0);
            HostProjectWithConfigurationChange = new HostProject("c:\\MyProject\\Test.csproj", FallbackRazorConfiguration.MVC_1_0);

            Workspace = TestWorkspace.Create(HostServices);

            var projectId = ProjectId.CreateNewId("Test");
            var solution = Workspace.CurrentSolution.AddProject(ProjectInfo.Create(
                projectId,
                VersionStamp.Default,
                "Test",
                "Test",
                LanguageNames.CSharp,
                "c:\\MyProject\\Test.csproj"));
            WorkspaceProject = solution.GetProject(projectId);

            SomeTagHelpers = new List<TagHelperDescriptor>();
            SomeTagHelpers.Add(TagHelperDescriptorBuilder.Create("Test1", "TestAssembly").Build());

            Document = new HostDocument("c:\\MyProject\\File.cshtml", "File.cshtml");
        }

        private HostDocument Document { get; }

        private HostProject HostProject { get; }

        private HostProject HostProjectWithConfigurationChange { get; }

        private Project WorkspaceProject { get; }

        private TestTagHelperResolver TagHelperResolver { get; }

        private HostServices HostServices { get; }

        private Workspace Workspace { get; }

        private List<TagHelperDescriptor> SomeTagHelpers { get; }

        [Fact]
        public void DocumentState_ConstructedNew()
        {
            // Arrange

            // Act
            var state = new DocumentState(Workspace.Services, Document);

            // Assert
            Assert.NotEqual(VersionStamp.Default, state.Version);
        }

        [Fact] // There's no magic in the constructor.
        public void ProjectState_ConstructedFromCopy()
        {
            // Arrange
            var original = new DocumentState(Workspace.Services, Document);

            // Act
            var state = new DocumentState(original, ProjectDifference.ConfigurationChanged);

            // Assert
            Assert.NotEqual(original.Version, state.Version);
        }
    }
}