/****************************************************************************
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** Copyright (C) 2018 The Qt Company Ltd.
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#pragma once

#include <collectusedmacrosandsourcespreprocessorcallbacks.h>

#include <filepathcachingfwd.h>
#include <usedmacro.h>

#include <clang/Frontend/FrontendActions.h>
#include <clang/Frontend/CompilerInstance.h>
#include <clang/Lex/Preprocessor.h>

namespace ClangBackEnd {

class CollectUsedMacrosAction final : public clang::PreprocessOnlyAction
{
public:
    CollectUsedMacrosAction(UsedMacros &usedMacros,
                            FilePathCachingInterface &filePathCache,
                            SourceDependencies &sourceDependencies,
                            FilePathIds &sourceFiles,
                            FileStatuses &fileStatuses)
        : m_usedMacros(usedMacros),
          m_filePathCache(filePathCache),
          m_sourceDependencies(sourceDependencies),
          m_sourceFiles(sourceFiles),
          m_fileStatuses(fileStatuses)
    {
    }

    bool BeginSourceFileAction(clang::CompilerInstance &compilerInstance) override
    {
      if (clang::PreprocessOnlyAction::BeginSourceFileAction(compilerInstance)) {
          auto &preprocessor = compilerInstance.getPreprocessor();

          preprocessor.SetSuppressIncludeNotFoundError(true);

          auto macroPreprocessorCallbacks = new CollectUsedMacrosAndSourcesPreprocessorCallbacks(
                      m_usedMacros,
                      m_filePathCache,
                      compilerInstance.getSourceManager(),
                      compilerInstance.getPreprocessorPtr(),
                      m_sourceDependencies,
                      m_sourceFiles,
                      m_fileStatuses);

          preprocessor.addPPCallbacks(std::unique_ptr<clang::PPCallbacks>(macroPreprocessorCallbacks));

          return true;
      }

      return false;
    }

    void EndSourceFileAction() override
    {
      clang::PreprocessOnlyAction::EndSourceFileAction();
    }

private:
    UsedMacros &m_usedMacros;
    FilePathCachingInterface &m_filePathCache;
    SourceDependencies &m_sourceDependencies;
    FilePathIds &m_sourceFiles;
    FileStatuses &m_fileStatuses;
};

} // namespace ClangBackEnd