// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using Microsoft.DotNet.Cli;
using Microsoft.DotNet.Cli.ShellShim;
using Microsoft.DotNet.Cli.Utils;
using Microsoft.DotNet.Configurer;
using Microsoft.Extensions.DependencyModel.Tests;
using Microsoft.Extensions.EnvironmentAbstractions;
using Moq;
 
namespace Microsoft.DotNet.ShellShim.Tests
{
    public class LinuxEnvironmentPathTests
    {
        [UnixOnlyFact]
        public void GivenPathNotSetItPrintsManualInstructions()
        {
            var reporter = new BufferedReporter();
            var toolsPath = new BashPathUnderHomeDirectory("/home/user", ".dotnet/tools");
            var pathValue = @"/usr/bin";
            var provider = new Mock<IEnvironmentProvider>(MockBehavior.Strict);
 
            provider
                .Setup(p => p.GetEnvironmentVariable("PATH"))
                .Returns(pathValue);
 
            var environmentPath = new LinuxEnvironmentPath(
                toolsPath,
                reporter,
                provider.Object,
                FileSystemMockBuilder.Empty.File);
 
            environmentPath.PrintAddPathInstructionIfPathDoesNotExist();
 
            reporter.Lines.Should().Equal(
                string.Format(
                    CliStrings.EnvironmentPathLinuxManualInstructions,
                    toolsPath.Path));
        }
 
        [UnixOnlyFact]
        public void GivenPathNotSetAndProfileExistsItPrintsLogoutMessage()
        {
            var reporter = new BufferedReporter();
            var toolsPath = new BashPathUnderHomeDirectory("/home/user", ".dotnet/tools");
            var pathValue = @"/usr/bin";
            var provider = new Mock<IEnvironmentProvider>(MockBehavior.Strict);
 
            provider
                .Setup(p => p.GetEnvironmentVariable("PATH"))
                .Returns(pathValue);
 
            var environmentPath = new LinuxEnvironmentPath(
                toolsPath,
                reporter,
                provider.Object,
                new FileSystemMockBuilder()
                    .AddFile(LinuxEnvironmentPath.DotnetCliToolsProfilePath, "")
                    .Build()
                    .File);
 
            environmentPath.PrintAddPathInstructionIfPathDoesNotExist();
 
            reporter.Lines.Should().Equal(CliStrings.EnvironmentPathLinuxNeedLogout);
        }
 
        [UnixOnlyTheory]
        [InlineData("/home/user/.dotnet/tools")]
        [InlineData("~/.dotnet/tools")]
        public void GivenPathSetItPrintsNothing(string toolsDirectoryOnPath)
        {
            var reporter = new BufferedReporter();
            var toolsPath = new BashPathUnderHomeDirectory("/home/user", ".dotnet/tools");
            var pathValue = @"/usr/bin";
            var provider = new Mock<IEnvironmentProvider>(MockBehavior.Strict);
 
            provider
                .Setup(p => p.GetEnvironmentVariable("PATH"))
                .Returns(pathValue + ":" + toolsDirectoryOnPath);
 
            var environmentPath = new LinuxEnvironmentPath(
                toolsPath,
                reporter,
                provider.Object,
                FileSystemMockBuilder.Empty.File);
 
            environmentPath.PrintAddPathInstructionIfPathDoesNotExist();
 
            reporter.Lines.Should().BeEmpty();
        }
 
        [UnixOnlyFact]
        public void GivenPathSetItDoesNotAddPathToEnvironment()
        {
            var reporter = new BufferedReporter();
            var toolsPath = new BashPathUnderHomeDirectory("/home/user", ".dotnet/tools");
            var pathValue = @"/usr/bin";
            var provider = new Mock<IEnvironmentProvider>(MockBehavior.Strict);
            var fileSystem = new FileSystemMockBuilder().Build().File;
 
            provider
                .Setup(p => p.GetEnvironmentVariable("PATH"))
                .Returns(pathValue + ":" + toolsPath.Path);
 
            var environmentPath = new LinuxEnvironmentPath(
                toolsPath,
                reporter,
                provider.Object,
                fileSystem);
 
            environmentPath.AddPackageExecutablePathToUserPath();
 
            reporter.Lines.Should().BeEmpty();
 
            fileSystem
                .Exists(LinuxEnvironmentPath.DotnetCliToolsProfilePath)
                .Should()
                .Be(false);
        }
 
        [UnixOnlyFact]
        public void GivenPathNotSetItAddsToEnvironment()
        {
            var reporter = new BufferedReporter();
            var toolsPath = new BashPathUnderHomeDirectory("/home/user", ".dotnet/tools");
            var pathValue = @"/usr/bin";
            var provider = new Mock<IEnvironmentProvider>(MockBehavior.Strict);
            IFileSystem fileSystem = new FileSystemMockBuilder().Build();
            fileSystem.Directory.CreateDirectory("/etc/profile.d");
 
            provider
                .Setup(p => p.GetEnvironmentVariable("PATH"))
                .Returns(pathValue);
 
            var environmentPath = new LinuxEnvironmentPath(
                toolsPath,
                reporter,
                provider.Object,
                fileSystem.File);
 
            environmentPath.AddPackageExecutablePathToUserPath();
 
            reporter.Lines.Should().BeEmpty();
 
            fileSystem
                .File
                .ReadAllText(LinuxEnvironmentPath.DotnetCliToolsProfilePath)
                .Should()
                .Be($"export PATH=\"$PATH:{toolsPath.PathWithDollar}\"");
        }
    }
}