using System.Collections.Generic;
using System.Linq;
using JetBrains.Annotations;
using JetBrains.Application.Parts;
using JetBrains.ProjectModel;
using JetBrains.ProjectModel.MSBuild;
using JetBrains.ProjectModel.Properties;
using JetBrains.Util;
using Microsoft.CodeAnalysis;

namespace JetBrains.ForTea.RiderPlugin.Psi.Resolve.Macros.Impl
{
  [SolutionComponent(Instantiation.DemandAnyThreadSafe)]
  public class T4LightMacroResolver : IT4LightMacroResolver
  {
    [NotNull] private ISolution Solution { get; }

    public T4LightMacroResolver([NotNull] ISolution solution) => Solution = solution;

    public virtual Dictionary<string, string> ResolveAllLightMacros(IProjectFile file)
    {
      var result = new Dictionary<string, string>(CaseInsensitiveComparison.Comparer);
      AddBasicMacros(result);
      AddProjectMacros(file, result);
      AddSolutionMacros(result);
      return result;
    }

    private void AddProjectMacros([NotNull] IProjectFile file, Dictionary<string, string> result)
    {
      var project = file.GetProject();
      if (project == null) return;
      var configuration = project.ProjectProperties.ActiveConfigurations.Configurations.SingleItem();
      if (configuration != null) result.Add("Configuration", configuration.Name);
      result.Add("TargetDir",
        project.GetOutputFilePath(project.GetCurrentTargetFrameworkId()).Parent
          .FullPathWithTrailingPathSeparator());
      result.Add("ProjectDir", project.Location.FullPathWithTrailingPathSeparator());
      result.Add("ProjectFileName", project.ProjectFileLocation.Name);
      result.Add("ProjectName", project.Name);
      result.Add("ProjectPath", project.Location.FullPathWithTrailingPathSeparator());
      var intermediate = project.GetIntermediateDirectories().FirstOrDefault();
      if (intermediate != null) result.Add("IntDir", intermediate.FullPathWithTrailingPathSeparator());
      AddMsBuildProjectProperties(result, project);
    }

    private static void AddMsBuildProjectProperties(
      [NotNull] Dictionary<string, string> result,
      [NotNull] IProject project
    )
    {
      result.Add("TargetExt", T4MSBuildProjectUtil.GetTargetExtension(project));
      string rootNamespace = project
        .GetRequestedProjectProperties(MSBuildProjectUtil.RootNamespaceProperty)
        .FirstOrDefault();
      if (rootNamespace != null) result.Add("RootNameSpace", rootNamespace);
      string outDir = project.GetRequestedProjectProperties(MSBuildProjectUtil.OutDirProperty).FirstOrDefault();
      if (outDir != null) result.Add("OutDir", outDir);
    }

    private void AddSolutionMacros(Dictionary<string, string> result)
    {
      var solutionFile = Solution.SolutionFile;
      if (solutionFile == null) return;
      result.Add("SolutionFileName", solutionFile.Name);
    }

    private void AddBasicMacros([NotNull] Dictionary<string, string> result)
    {
      result.Add("SolutionDir", Solution.SolutionDirectory.FullPathWithTrailingPathSeparator());
      result.Add("SolutionName", Solution.Name);
      result.Add("SolutionPath", Solution.SolutionFilePath.FullPathWithTrailingPathSeparator());
    }
  }
}