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#pragma once

#include "clangjobrequest.h"

#include <functional>

namespace ClangBackEnd {

class ProjectParts;
class TranslationUnits;

class JobQueue
{
public:
    JobQueue(TranslationUnits &translationUnits, ProjectParts &projects);

    void add(const JobRequest &job);

    JobRequests processQueue();

    using IsJobRunningHandler = std::function<bool(const Utf8String &, const Utf8String &)>;
    void setIsJobRunningHandler(const IsJobRunningHandler &isJobRunningHandler);

public: // for tests
    JobRequests queue() const;
    int size() const;
    void prioritizeRequests();

private:
    using DocumentId = QPair<Utf8String, Utf8String>;
    bool isJobRunningForDocument(const DocumentId &documentId);
    JobRequests takeJobRequestsToRunNow();
    void removeOutDatedRequests();
    bool isJobRequestOutDated(const JobRequest &jobRequest) const;

private:
    TranslationUnits &m_translationUnits;
    ProjectParts &m_projectParts;

    IsJobRunningHandler m_isJobRunningHandler;

    JobRequests m_queue;
};

} // namespace ClangBackEnd