#include "databasemanager.h"

DatabaseManager::DatabaseManager(QString host, QString dbName, QString user, QString password)
{

    db = QSqlDatabase::addDatabase("QPSQL");

    db.setDatabaseName(dbName);
    db.setHostName(host);
    db.setUserName(user);
    db.setPassword(password);
    opened = db.open();
    if (!opened)
    {
        qDebug() << "Opening error" + db.lastError().text();
    }
    query = QSqlQuery("query", db);
}

bool DatabaseManager::saveSubject(Subject* subject, QString table)
{
    QString id = subject->idToStringWithoutBraces();
    if (checkIfExists(id, table))
        return false;
    query.prepare(QString("INSERT INTO %1 (id, name, last_update) "
                          "VALUES (:id, :name, :last_update)").arg(table));
    query.bindValue(":id", id);
    query.bindValue(":name", subject->getName());
    query.bindValue(":last_update", QDateTime::fromMSecsSinceEpoch(subject->getLastUpdate()).toString("yyyy-MM-dd hh:mm:ss.zzz"));
    query.exec();
    return true;
}

bool DatabaseManager::saveToken(Token* token, QString table)
{
    QString id = token->idToStringWithoutBraces();
    if (checkIfExists(id, table))
        return false;
    query.prepare(QString("INSERT INTO %1 (id, last_update, token_data, subject_id) "
                  "VALUES (:id, :last_update, :data, :subject_id)").arg(table));
    query.bindValue(":id", id);
    query.bindValue(":last_update", QDateTime::fromMSecsSinceEpoch(token->getLastUpdate()).toString("yyyy-MM-dd hh:mm:ss.zzz"));
    query.bindValue(":data", token->getTokenData());
    query.bindValue(":subject_id", token->subjectIdToStringWithoutBraces());
    query.exec();
    return true;
}

void DatabaseManager::saveSubjectAttribute(Subject *subject, QString table)
{
    auto attributes = subject->getAtr();
    for (auto attribute : attributes){
        query.prepare(QString("INSERT INTO %1 (id, attribute_key, attribute_value, subject_id)"
                              "VALUES (:id, :key, :value, :subject_id)").arg(table));
        query.bindValue(":id", subject->idToStringWithoutBraces() + " " + attribute.first);
        query.bindValue(":key", attribute.first);
        query.bindValue(":value", attribute.second);
        query.bindValue(":subject_id", subject->idToStringWithoutBraces());
        query.exec();
    }


}

QString DatabaseManager::getTestMessage(int id)
{
    query.prepare("SELECT message FROM test WHERE id = :id");
    query.bindValue(":id", id);
    query.exec();
    query.next();
    return query.value(0).toString();
}

void DatabaseManager::createTestRecord(QString msg)
{
    query.exec("SELECT MAX(id) FROM test");
    query.next();
    int id = query.value(0).toInt() + 1;
    query.prepare("INSERT INTO test (id, message) VALUES (:id, :msg)");
    query.bindValue(":id", id);
    query.bindValue(":msg", msg);
    query.exec();
    query.next();
    qDebug() << "U inserted new row, id: " << id << "msg: " << getTestMessage(id);

}


bool DatabaseManager::checkIfExists(QString id, QString table)
{
    query.prepare(QString("SELECT exists(SELECT 1 FROM %1 WHERE id = :id)").arg(table));
    query.bindValue(":id", id);
    query.exec();
    query.next();
    return query.value(0).toBool();
}