/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
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** General Public License version 3 as published by the Free Software
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#pragma once

#include "stringcache.h"

#include <collectincludespreprocessorcallbacks.h>

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

namespace ClangBackEnd {

class CollectIncludesAction final : public clang::PreprocessOnlyAction
{
public:
    CollectIncludesAction(FilePathIndices &includeIds,
                          FilePathCache<> &filePathCache,
                          FilePathIndices &excludedIncludeUID,
                          FilePathIndices &alreadyIncludedFileUIDs)
        : m_includeIds(includeIds),
          m_filePathCache(filePathCache),
          m_excludedIncludeUID(excludedIncludeUID),
          m_alreadyIncludedFileUIDs(alreadyIncludedFileUIDs)
    {
    }

    bool BeginSourceFileAction(clang::CompilerInstance &compilerInstance,
                               llvm::StringRef filename) override
    {
      if (clang::PreprocessOnlyAction::BeginSourceFileAction(compilerInstance, filename)) {
          auto &preprocessor = compilerInstance.getPreprocessor();
          auto &headerSearch = preprocessor.getHeaderSearchInfo();

          preprocessor.SetSuppressIncludeNotFoundError(true);

          auto macroPreprocessorCallbacks = new CollectIncludesPreprocessorCallbacks(headerSearch,
                                                                                     m_includeIds,
                                                                                     m_filePathCache,
                                                                                     m_excludedIncludeUID,
                                                                                     m_alreadyIncludedFileUIDs);

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

          return true;
      }

      return false;
    }

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

private:
    FilePathIndices &m_includeIds;
    FilePathCache<> &m_filePathCache;
    FilePathIndices &m_excludedIncludeUID;
    FilePathIndices &m_alreadyIncludedFileUIDs;
};

} // namespace ClangBackEnd
