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#pragma once

#include "clangsupport_global.h"

#include "filepathcachinginterface.h"

#include <QDir>
#include <QTimer>

#include <utils/algorithm.h>

#include <functional>

namespace ClangBackEnd {

template<typename Timer>
class DirectoryPathCompressor
{
public:
    DirectoryPathCompressor() { m_timer.setSingleShot(true); }

    virtual ~DirectoryPathCompressor() = default;

    void addDirectoryPathId(DirectoryPathId directoryPathIdId)
    {
        auto found = std::lower_bound(m_directoryPathIds.begin(),
                                      m_directoryPathIds.end(),
                                      directoryPathIdId);

        if (found == m_directoryPathIds.end() || *found != directoryPathIdId)
            m_directoryPathIds.insert(found, directoryPathIdId);

        restartTimer();
    }

    DirectoryPathIds takeDirectoryPathIds() { return std::move(m_directoryPathIds); }

    virtual void setCallback(std::function<void(ClangBackEnd::DirectoryPathIds &&)> &&callback)
    {
        QObject::connect(&m_timer, &Timer::timeout, [this, callback = std::move(callback)] {
            callback(takeDirectoryPathIds());
        });
    }

unittest_public:
    virtual void restartTimer()
    {
        m_timer.start(20);
    }

    Timer &timer()
    {
        return m_timer;
    }

private:
    DirectoryPathIds m_directoryPathIds;
    Timer m_timer;
};

} // namespace ClangBackEnd
