// 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 System.Linq;
 
namespace Microsoft.CodeAnalysis.Editor;
 
internal class SolutionChangeSummary
{
    public readonly Solution OldSolution;
    public readonly Solution NewSolution;
 
    public readonly int TotalFilesAffected;
    public readonly int TotalProjectsAffected;
 
    public SolutionChangeSummary(Solution oldSolution, Solution newSolution, SolutionChanges changes)
    {
        OldSolution = oldSolution;
        NewSolution = newSolution;
 
        foreach (var p in changes.GetProjectChanges())
        {
            TotalProjectsAffected += 1;
 
            TotalFilesAffected += p.GetAddedDocuments().Count() +
                                  p.GetChangedDocuments().Count() +
                                  p.GetRemovedDocuments().Count() +
                                  p.GetAddedAdditionalDocuments().Count() +
                                  p.GetChangedAdditionalDocuments().Count() +
                                  p.GetRemovedAdditionalDocuments().Count() +
                                  p.GetAddedAnalyzerConfigDocuments().Count() +
                                  p.GetChangedAnalyzerConfigDocuments().Count() +
                                  p.GetRemovedAnalyzerConfigDocuments().Count();
 
            if (p.GetAddedDocuments().Any() || p.GetRemovedDocuments().Any() ||
                p.GetAddedAdditionalDocuments().Any() || p.GetRemovedAdditionalDocuments().Any() ||
                p.GetAddedAnalyzerConfigDocuments().Any() || p.GetRemovedAnalyzerConfigDocuments().Any() ||
                p.GetAddedMetadataReferences().Any() || p.GetRemovedMetadataReferences().Any() ||
                p.GetAddedProjectReferences().Any() || p.GetRemovedProjectReferences().Any() ||
                p.GetAddedAnalyzerReferences().Any() || p.GetRemovedAnalyzerReferences().Any())
            {
                TotalFilesAffected += 1;  // The project file itself was affected too.
            }
        }
 
        var totalProjectsAddedOrRemoved = changes.GetAddedProjects().Count() + changes.GetRemovedProjects().Count();
 
        TotalFilesAffected += totalProjectsAddedOrRemoved;
        TotalProjectsAffected += totalProjectsAddedOrRemoved;
    }
}