/****************************************************************************
** Copyright (c) 2025 Evgeny Teterin (nayk) <nayk@nxt.ru>
** All right reserved.
**
** Permission is hereby granted, free of charge, to any person obtaining
** a copy of this software and associated documentation files (the
** "Software"), to deal in the Software without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Software, and to
** permit persons to whom the Software is furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be
** included in all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
** NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
** LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
** OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
** WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
**
****************************************************************************/
#pragma once
#ifndef LOG_WORKER_H
#define LOG_WORKER_H

#include <QtCore/QObject>
#include <QtCore/QString>
#include <QtCore/QMutex>
#include <QtCore/QFile>
#include <QtCore/QDateTime>
#include <QtCore/QQueue>
#include <QtCore/QTimer>
#include <atomic>

//==============================================================================
class LogWorker : public QObject
{
    Q_OBJECT
public:
    explicit LogWorker(const QString &logFilePath, QObject *parent = nullptr);
    virtual ~LogWorker();

signals:
    void started();
    void stopped();

public slots:
    Q_INVOKABLE void start();
    Q_INVOKABLE void stop();
    Q_INVOKABLE void writeLog(const QString &msg,
                              int type = 0,
                              const QString &objectName = QString());
private slots:
    void checkQueue();

private:
    const int queueIntervalMs {5000};
    struct LogRecord {
        int type {0};
        QString msg;
        QString objectName;
        QDateTime dateTime;
    };
    std::atomic<bool> running {false};
    qint64 linesCounter {0};
    qint64 linesPosition {0};
    QFile file;
    QMutex mutex;
    QDateTime startTime;
    QQueue<LogRecord> queue;
    QTimer *timer {nullptr};
    //
    void writeFirstLines();
    void writeLastLines();
    void writeLine(const QString &msg, int type = 0,
                   const QString &objectName = QString(),
                   const QDateTime &dateTime = QDateTime::currentDateTime());
    void writeAllFromQueue();
};
//==============================================================================

#endif // LOG_WORKER_H