/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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#pragma once

#include "collectbuilddependencyaction.h"

#include <filepathcachingfwd.h>
#include <filepathid.h>

#include <clang/Tooling/Tooling.h>

namespace ClangBackEnd {

class CollectBuildDependencyToolAction final : public clang::tooling::FrontendActionFactory
{
public:
    CollectBuildDependencyToolAction(BuildDependency &buildDependency,
                              const FilePathCachingInterface &filePathCache,
                              const ClangBackEnd::FilePaths &excludedIncludes,
                              SourcesManager &sourcesManager)
        : m_buildDependency(buildDependency),
          m_filePathCache(filePathCache),
          m_excludedFilePaths(excludedIncludes),
          m_sourcesManager(sourcesManager)
    {}


    bool runInvocation(std::shared_ptr<clang::CompilerInvocation> invocation,
                       clang::FileManager *fileManager,
                       std::shared_ptr<clang::PCHContainerOperations> pchContainerOperations,
                       clang::DiagnosticConsumer *diagnosticConsumer) override
    {
        if (m_excludedIncludeUIDs.empty())
            m_excludedIncludeUIDs = generateExcludedIncludeFileUIDs(*fileManager);

        return clang::tooling::FrontendActionFactory::runInvocation(invocation,
                                                                    fileManager,
                                                                    pchContainerOperations,
                                                                    diagnosticConsumer);
    }

    clang::FrontendAction *create() override
    {
        return new CollectBuildDependencyAction(m_buildDependency,
                                                m_filePathCache,
                                                m_excludedIncludeUIDs,
                                                m_alreadyIncludedFileUIDs,
                                                m_sourcesManager);
    }

    std::vector<uint> generateExcludedIncludeFileUIDs(clang::FileManager &fileManager) const
    {
        std::vector<uint> fileUIDs;
        fileUIDs.reserve(m_excludedFilePaths.size());

        for (const ClangBackEnd::FilePath &filePath : m_excludedFilePaths) {
            const clang::FileEntry *file = fileManager.getFile({filePath.data(), filePath.size()},
                                                               true);

            if (file)
                fileUIDs.push_back(file->getUID());
        }

        std::sort(fileUIDs.begin(), fileUIDs.end());

        return fileUIDs;
    }

private:
    std::vector<uint> m_alreadyIncludedFileUIDs;
    std::vector<uint> m_excludedIncludeUIDs;
    BuildDependency &m_buildDependency;
    const FilePathCachingInterface &m_filePathCache;
    const ClangBackEnd::FilePaths &m_excludedFilePaths;
    SourcesManager &m_sourcesManager;
};

} // namespace ClangBackEnd
