// 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.IO;
using System.Threading.Tasks;
using Microsoft.DotNet.OpenApi.Tests;
using Microsoft.Extensions.Tools.Internal;
using Xunit;
using Xunit.Abstractions;

namespace Microsoft.DotNet.OpenApi.Remove.Tests
{
    public class OpenApiRemoveTests : OpenApiTestBase
    {
        public OpenApiRemoveTests(ITestOutputHelper output) : base(output) { }

        [Fact]
        public async Task OpenApi_Remove_File()
        {
            var nswagJsonFile = "openapi.json";
            _tempDir
                .WithCSharpProject("testproj")
                .WithTargetFrameworks("netcoreapp3.0")
                .Dir()
                .WithContentFile(nswagJsonFile)
                .WithContentFile("Startup.cs")
                .Create();

            var add = GetApplication();
            var run = add.Execute(new[] { "add", "file", nswagJsonFile });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, run);

            // csproj contents
            var csproj = new FileInfo(Path.Join(_tempDir.Root, "testproj.csproj"));
            using (var csprojStream = csproj.OpenRead())
            using (var reader = new StreamReader(csprojStream))
            {
                var content = await reader.ReadToEndAsync();
                Assert.Contains("<PackageReference Include=\"NSwag.ApiDescription.Client\" Version=\"", content);
                Assert.Contains($"<OpenApiReference Include=\"{nswagJsonFile}\"", content);
            }

            var remove = GetApplication();
            var removeRun = remove.Execute(new[] { "remove", nswagJsonFile });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, removeRun);

            // csproj contents
            csproj = new FileInfo(Path.Join(_tempDir.Root, "testproj.csproj"));
            using (var csprojStream = csproj.OpenRead())
            using (var reader = new StreamReader(csprojStream))
            {
                var content = await reader.ReadToEndAsync();
                // Don't remove the package reference, they might have taken other dependencies on it
                Assert.Contains("<PackageReference Include=\"NSwag.ApiDescription.Client\" Version=\"", content);
                Assert.DoesNotContain($"<OpenApiReference Include=\"{nswagJsonFile}\"", content);
            }
            Assert.False(File.Exists(Path.Combine(_tempDir.Root, nswagJsonFile)));
        }

        [Fact]
        public async Task OpenApi_Remove_ViaUrl()
        {
            _tempDir
                .WithCSharpProject("testproj")
                .WithTargetFrameworks("netcoreapp3.0")
                .Dir()
                .WithContentFile("Startup.cs")
                .Create();

            var add = GetApplication();
            var run = add.Execute(new[] { "add", "url", FakeOpenApiUrl });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, run);

            // csproj contents
            var csproj = new FileInfo(Path.Join(_tempDir.Root, "testproj.csproj"));
            using (var csprojStream = csproj.OpenRead())
            using (var reader = new StreamReader(csprojStream))
            {
                var content = await reader.ReadToEndAsync();
                // Don't remove the package reference, they might have taken other dependencies on it
                Assert.Contains("<PackageReference Include=\"NSwag.ApiDescription.Client\" Version=\"", content);
            }

            var remove = GetApplication();
            var removeRun = remove.Execute(new[] { "remove", FakeOpenApiUrl });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, removeRun);

            // csproj contents
            csproj = new FileInfo(Path.Join(_tempDir.Root, "testproj.csproj"));
            using var removedCsprojStream = csproj.OpenRead();
            using var removedReader = new StreamReader(removedCsprojStream);
            var removedContent = await removedReader.ReadToEndAsync();
            // Don't remove the package reference, they might have taken other dependencies on it
            Assert.Contains("<PackageReference Include=\"NSwag.ApiDescription.Client\" Version=\"", removedContent);
            Assert.DoesNotContain($"<OpenApiReference", removedContent);
        }

        [Fact(Skip = "https://github.com/aspnet/AspNetCore/issues/12738")]
        public async Task OpenApi_Remove_Project()
        {
            _tempDir
               .WithCSharpProject("testproj")
               .WithTargetFrameworks("netcoreapp3.0")
               .Dir()
               .WithContentFile("Startup.cs")
               .Create();

            using var refProj = new TemporaryDirectory();
            var refProjName = "refProj";
            refProj
                .WithCSharpProject(refProjName)
                .WithTargetFrameworks("netcoreapp3.0")
                .Dir()
                .Create();

            var app = GetApplication();
            var refProjFile = Path.Join(refProj.Root, $"{refProjName}.csproj");
            var run = app.Execute(new[] { "add", "project", refProjFile });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, run);

            // csproj contents
            using (var csprojStream = new FileInfo(Path.Join(_tempDir.Root, "testproj.csproj")).OpenRead())
            using (var reader = new StreamReader(csprojStream))
            {
                var content = await reader.ReadToEndAsync();
                Assert.Contains("<PackageReference Include=\"NSwag.ApiDescription.Client\" Version=\"", content);
                Assert.Contains($"<OpenApiProjectReference Include=\"{refProjFile}\"", content);
            }

            var remove = GetApplication();
            run = app.Execute(new[] { "remove", refProjFile });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, run);

            // csproj contents
            using (var csprojStream = new FileInfo(Path.Join(_tempDir.Root, "testproj.csproj")).OpenRead())
            using (var reader = new StreamReader(csprojStream))
            {
                var content = await reader.ReadToEndAsync();
                Assert.Contains("<PackageReference Include=\"NSwag.ApiDescription.Client\" Version=\"", content);
                Assert.DoesNotContain($"<OpenApiProjectReference Include=\"{refProjFile}\"", content);
            }
        }

        [Fact]
        public async Task OpenApi_Remove_Multiple()
        {
            var nswagJsonFile = "openapi.json";
            var swagFile2 = "swag2.json";
            _tempDir
                .WithCSharpProject("testproj")
                .WithTargetFrameworks("netcoreapp3.0")
                .Dir()
                .WithContentFile(nswagJsonFile)
                .WithFile(swagFile2)
                .WithContentFile("Startup.cs")
                .Create();

            var add = GetApplication();
            var run = add.Execute(new[] { "add", "file", nswagJsonFile });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, run);

            add = GetApplication();
            run = add.Execute(new[] { "add", "file", swagFile2 });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, run);

            var remove = GetApplication();
            var removeRun = remove.Execute(new[] { "remove", nswagJsonFile, swagFile2 });

            Assert.True(string.IsNullOrEmpty(_error.ToString()), $"Threw error: {_error.ToString()}");
            Assert.Equal(0, removeRun);

            // csproj contents
            var csproj = new FileInfo(Path.Join(_tempDir.Root, "testproj.csproj"));
            using (var csprojStream = csproj.OpenRead())
            using (var reader = new StreamReader(csprojStream))
            {
                var content = await reader.ReadToEndAsync();
                // Don't remove the package reference, they might have taken other dependencies on it
                Assert.Contains("<PackageReference Include=\"NSwag.ApiDescription.Client\" Version=\"", content);
                Assert.DoesNotContain($"<OpenApiReference Include=\"{nswagJsonFile}\"", content);
            }
            Assert.False(File.Exists(Path.Combine(_tempDir.Root, nswagJsonFile)));
        }
    }
}