#pragma once

#include <QSql>

#include "data.h"

#include "serversdk/databasemanager.h"
#include "serversdk/databasetable.h"
#include "serversdk/databaseutils.h"
#include "serversdk/logger.h"
#include <QCoreApplication>

Q_DECLARE_LOGGING_CATEGORY(database)

class DatabaseAPI : public QObject
{
    Q_OBJECT
public:
    explicit DatabaseAPI(serversdk::DatabaseManager *dbMan, bool dryMode);

    bool open();

    bool executeQuery(QSqlQuery &query, const QString &statement = QString());

    bool downloadData();
    bool processData(const std::shared_ptr<Data> &data);
    qint64 getLastSync();
    void setLastSync(qint64 timestamp);
    void setLastUpdate(const QHash<QString, std::shared_ptr<Token> > &tokens);
    void setLastUpdate(const QList<QString> ids);
    qint64 getNow();

    void initNewTokens();

    // process data
    bool uploadTokens(const QHash<QString, std::shared_ptr<Token> > &tokens);
    bool uploadSubjects(const QHash<QString, std::shared_ptr<Subject> > &subjects);
    bool deleteItems(const QList<QString> &ids, const QString &tableName);

    std::shared_ptr<Token> getToken(QString &id);

    bool isAlreadyDeleted(QString &id);

    bool isValid();

private:
    int exists(const QString &id, const QString &tableName);

    QSqlQuery getUpdatedTokens();
    std::shared_ptr<Data> composeData(const QSqlQuery &updatedQuery, QSqlQuery &deletedQuery);
    qint16 getNumOfTokensOfSubject(const QString &id);
    QString getSubjectNameByTokenId(const QString &tokenId);

signals:
    void downloadDataFinished(std::shared_ptr<Data> = std::shared_ptr<Data>());
    void error();

private:
    bool mDryMode;
    bool mValid = true;
    serversdk::DatabaseManager *mDbMan = nullptr;
    std::unique_ptr<serversdk::DatabaseUtils> utils;
};