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** Copyright (C) 2018 The Qt Company Ltd.
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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 "symbolindexertaskqueueinterface.h"

#include <filepathid.h>

#include <utils/smallstringvector.h>

#include <functional>
#include <vector>

namespace ClangBackEnd {

class SymbolsCollectorInterface;
class SymbolStorageInterface;

class SymbolIndexerTask
{
public:
    using Callable = std::function<void(SymbolsCollectorInterface &symbolsCollector,
                                        SymbolStorageInterface &symbolStorage)>;

    SymbolIndexerTask(FilePathId filePathId,
                      std::size_t projectPartId,
                      Callable &&callable)
        : callable(std::move(callable)),
          filePathId(filePathId),
          projectPartId(projectPartId)
    {
    }

    SymbolIndexerTask clone() const
    {
        return *this;
    }

    friend
    bool operator==(const SymbolIndexerTask &first, const SymbolIndexerTask &second)
    {
        return first.filePathId == second.filePathId && first.projectPartId == second.projectPartId;
    }

    friend
    bool operator<(const SymbolIndexerTask &first, const SymbolIndexerTask &second)
    {
        return std::tie(first.filePathId, first.projectPartId)
             < std::tie(second.filePathId, second.projectPartId);
    }

public:
    Callable callable;
    FilePathId filePathId;
    std::size_t projectPartId;
};

class SymbolIndexerTaskQueue
{
public:
    SymbolIndexerTaskQueue();

    void addOrUpdateTasks(std::vector<SymbolIndexerTask> &&tasks)
    /* [[expects: std::is_sorted(tasks)]] */;
    void removeTasks(const Utils::SmallStringVector &projectPartIds)
    /* [[expects: std::is_sorted(projectPartIds)]] */;

    const std::vector<SymbolIndexerTask> &tasks() const;

    std::size_t projectPartNumberId(Utils::SmallStringView projectPartId);
    std::vector<std::size_t> projectPartNumberIds(const Utils::SmallStringVector &projectPartIds)
    /* [[ensures result: std::is_sorted(result)]] */;

    void processTasks() ;

private:
    std::vector<Utils::SmallString> m_projectPartIds;
    std::vector<SymbolIndexerTask> m_tasks;
};

} // namespace ClangBackEnd