// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
 
using Roslyn.Test.Utilities;
using Roslyn.Utilities;
using Xunit;
 
namespace Microsoft.CodeAnalysis.UnitTests;
 
public sealed class FilePathUtilitiesTests
{
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/1579")]
    public void GetRelativePath_SameDirectory()
    {
        var baseDirectory = @"C:\Alpha\Beta\Gamma";
        var fullPath = @"C:\Alpha\Beta\Gamma\Doc.txt";
 
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected: @"Doc.txt", actual: result);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/1579")]
    public void GetRelativePath_NestedOneLevelDown()
    {
        var baseDirectory = @"C:\Alpha\Beta\Gamma";
        var fullPath = @"C:\Alpha\Beta\Gamma\Delta\Doc.txt";
 
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected: @"Delta\Doc.txt", actual: result);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/1579")]
    public void GetRelativePath_NestedTwoLevelsDown()
    {
        var baseDirectory = @"C:\Alpha\Beta\Gamma";
        var fullPath = @"C:\Alpha\Beta\Gamma\Delta\Epsilon\Doc.txt";
 
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected: @"Delta\Epsilon\Doc.txt", actual: result);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/1579")]
    public void GetRelativePath_UpOneLevel()
    {
        var baseDirectory = @"C:\Alpha\Beta\Gamma";
        var fullPath = @"C:\Alpha\Beta\Doc.txt";
 
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected: @"..\Doc.txt", actual: result);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/1579")]
    public void GetRelativePath_UpTwoLevels()
    {
        var baseDirectory = @"C:\Alpha\Beta\Gamma";
        var fullPath = @"C:\Alpha\Doc.txt";
 
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected: @"..\..\Doc.txt", actual: result);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/1579")]
    public void GetRelativePath_UpTwoLevelsAndThenDown()
    {
        var baseDirectory = @"C:\Alpha\Beta\Gamma";
        var fullPath = @"C:\Alpha\Phi\Omega\Doc.txt";
 
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected: @"..\..\Phi\Omega\Doc.txt", actual: result);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/1579")]
    public void GetRelativePath_OnADifferentDrive()
    {
        var baseDirectory = @"C:\Alpha\Beta\Gamma";
        var fullPath = @"D:\Alpha\Beta\Gamma\Doc.txt";
 
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected: @"D:\Alpha\Beta\Gamma\Doc.txt", actual: result);
    }
 
    [Fact, WorkItem("https://github.com/dotnet/roslyn/issues/4660")]
    public void GetRelativePath_WithBaseDirectoryMatchingIncompletePortionOfFullPath()
    {
        var baseDirectory = @"C:\Alpha\Beta";
        var fullPath = @"C:\Alpha\Beta2\Gamma";
 
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected: @"..\Beta2\Gamma", actual: result);
    }
 
    [ConditionalTheory(typeof(WindowsOnly)), WorkItem(72043, "https://github.com/dotnet/roslyn/issues/72043")]
    [InlineData(@"C:\Alpha", @"C:\", @"..")]
    [InlineData(@"C:\Alpha\Beta", @"C:\", @"..\..")]
    [InlineData(@"C:\Alpha\Beta", @"C:\Gamma", @"..\..\Gamma")]
    public void GetRelativePath_WithFullPathShorterThanBasePath_Windows(string baseDirectory, string fullPath, string expected)
    {
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected, result);
    }
 
    [ConditionalTheory(typeof(UnixLikeOnly)), WorkItem(72043, "https://github.com/dotnet/roslyn/issues/72043")]
    [InlineData("/Alpha", "/", "..")]
    [InlineData("/Alpha/Beta", "/", "../..")]
    [InlineData("/Alpha/Beta", "/Gamma", "../../Gamma")]
    public void GetRelativePath_WithFullPathShorterThanBasePath_Unix(string baseDirectory, string fullPath, string expected)
    {
        var result = PathUtilities.GetRelativePath(baseDirectory, fullPath);
 
        Assert.Equal(expected, result);
    }
}