// Squawk messenger. 
// Copyright (C) 2019  Yury Gubich <blue@macaw.me>
// 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#ifndef CORE_DELAYMANAGER_H
#define CORE_DELAYMANAGER_H

#include <list>
#include <set>

#include <QObject>
#include <QString>

#include <shared/vcard.h>
#include <shared/info.h>

namespace Core {

class DelayManager : public QObject
{
    Q_OBJECT

    enum class TaskType {
        cardInternal,
        infoForUser
    }
public:
    DelayManager(uint16_t maxParallelJobs = 5, QObject* parent = nullptr);
    ~DelayManager();

    void requestVCard(const QString& jid);
    void requestInfo(const QString& jid);

signals:
    void requestVCard(const QString& jid);

public slots:
    void receivedVCard(const QString& jid, const Shared::VCard& card);

private:
    typedef std::pair<TaskType, void*> Job;

    void scheduleJob(TaskType type, void* data);
    void executeJob(Job job);
    void jobIsDone(uint16_t jobId);

private:
    uint16_t maxParallelJobs;
    uint16_t nextJobId;
    std::list<Job> scheduledJobs;
    std::map<uint16_t, Job> runningJobs;

    std::set<QString> pendingVCards;
    std::map<QString, uint16_t> requestedVCards;
};

}

#endif // CORE_DELAYMANAGER_H