#pragma once

#include <QSql>
#include <QSqlDatabase>
#include <QSqlQuery>
#include <QSqlError>

#include <QVariant>
#include <QDebug>
#include "subject.h"
#include "token.h"
#include <QDateTime>


class DatabaseManager : public QObject
{
    Q_OBJECT
public:
    DatabaseManager(const QString& host, const QString& dbName, const QString& user, const QString& password, const bool& dryMode = false);

    int saveSubject(const std::shared_ptr<Subject>& subject, const QString& table);
    int saveToken(const std::shared_ptr<Token>& token, const QString& table);
    void saveSubjectAttributes(const std::shared_ptr<Subject>& subject, const QString& table);
    void setDeleted(const QString& id, const QString& table, quint64 time);

    void dropTables();
    void createTables();

    quint64 getLastSync();
    void updateLastSync(quint64 lastSync);
    quint64 getNow();

    QSqlQuery getUpdatedTokens();
    QSqlQuery getToken(const QString& id);

    void setLastUpdate(const QString& id, quint64 lastUpdate);

    void log(const QString &msg);
    QString getSubjectNameByTokenId(const QString &tokenId);
    QString getSubjectNameById(const QString &id);
    bool checkDeletedToken(const QString &id);

    bool isOpen();


private:
    bool checkIfExists(const QString& id, const QString& table);
    bool executeQuery(QSqlQuery &query, const QString &statement = QString());
    QString getLastQuery(const QSqlQuery &query) const;

signals:
    void error();

private:
    QSqlDatabase db;
    bool dryMode = false;
    bool opened = false;
};