using System.Linq;
using GammaJul.ForTea.Core.Psi;
using GammaJul.ForTea.Core.Psi.FileType;
using GammaJul.ForTea.Core.TemplateProcessing.Services;
using GammaJul.ForTea.Core.Tree;
using JetBrains.Annotations;
using JetBrains.Application;
using JetBrains.Application.Parts;
using JetBrains.Application.Threading;
using JetBrains.Diagnostics;
using JetBrains.ForTea.RiderPlugin.ProtocolAware.Services;
using JetBrains.ForTea.RiderPlugin.Resources;
using JetBrains.ProjectModel;
using JetBrains.RdBackend.Common.Features.ProjectModel.CustomTools;
using JetBrains.ReSharper.Features.Altering.Resources;
using JetBrains.ReSharper.Psi;
using JetBrains.ReSharper.Psi.Files;
using JetBrains.ReSharper.Psi.Tree;
using JetBrains.UI.Icons;
using JetBrains.Util;
using Strings = JetBrains.ForTea.RiderPlugin.Resources.Strings;
using UsageStatisticsNew = JetBrains.Application.ActivityTrackingNew.UsageStatistics;

namespace JetBrains.ForTea.RiderPlugin.ProtocolAware.Tool
{
  [ShellComponent(Instantiation.DemandAnyThreadSafe)] // This class cannot be made a solution component
  public sealed class T4InternalGenerator : ISingleFileCustomTool
  {
    public string Name => Strings.BundledT4TemplateExecutor_Text;
    public string ActionName => null;
    public IconId Icon => FileLayoutThemedIcons.TypeTemplate.Id;
    public string[] CustomTools => new[] { "T4 Generator Custom Tool" };
    public bool IsEnabled => true;

    public string[] Extensions => new[]
    {
      T4FileExtensions.MainExtensionNoDot,
      T4FileExtensions.SecondExtensionNoDot
      // .ttinclude files exist for being included and should not be auto-executed
    };

    [NotNull] private UsageStatisticsNew Statistics { get; }

    [NotNull] private ILogger Logger { get; }

    public T4InternalGenerator([NotNull] UsageStatisticsNew statistics, [NotNull] ILogger logger)
    {
      Statistics = statistics;
      Logger = logger;
    }

    public bool IsApplicable(IProjectFile projectFile)
    {
      using (projectFile.Locks.UsingReadLock())
      {
        if (!projectFile.LanguageType.Is<T4ProjectFileType>()) return false;
        var dataManager = projectFile.GetSolution().GetComponent<IT4TemplateKindProvider>();
        var kind = dataManager.GetTemplateKind(projectFile);
        return kind != T4TemplateKind.Unknown;
      }
    }

    public string[] Keywords => new[] { "tt", "t4", "template", "generator" };

    [NotNull]
    public ISingleFileCustomToolExecutionResult Execute(IProjectFile projectFile)
    {
      Logger.Verbose("Got request to execute a file");
      var file = projectFile.ToSourceFile()?.GetPsiFiles(T4Language.Instance).OfType<IT4File>().SingleOrDefault();
      if (file == null) return SingleFileCustomToolExecutionResult.NotExecuted;
      var solution = file.GetSolution();
      var dataManager = solution.GetComponent<IT4TemplateKindProvider>();
      var kind = dataManager.GetTemplateKind(projectFile);
      if (kind is T4TemplateKind.Executable) Execute(file, solution);
      if (kind is T4TemplateKind.Preprocessed) Preprocess(file, solution);
      return SingleFileCustomToolExecutionResult.NotExecuted;
    }

    private void Execute([NotNull] IT4File file, [NotNull] ISolution solution)
    {
      Statistics.TrackAction(T4StatisticIdBundle.RunSilently);
      var manager = solution.GetComponent<IT4TemplateExecutionManager>();
      if (manager.IsExecutionRunning(file.PhysicalPsiSourceFile.NotNull())) return;
      manager.ExecuteSilently(file);
    }

    private void Preprocess([NotNull] IT4File file, [NotNull] ISolution solution)
    {
      Statistics.TrackAction(T4StatisticIdBundle.PreprocessSilently);
      solution.GetComponent<IT4TemplatePreprocessingManager>().TryPreprocess(file);
    }
  }
}