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#include "timequery.h"

#include <QtCore/QStringList>

#include <QtXmlPatterns/QXmlQuery>

TimeInformation::TimeInformation(const QString &time, const QString &direction)

    : m_time(time), m_direction(direction)

{

}

QString TimeInformation::time() const

{

    return m_time;

}

QString TimeInformation::direction() const

{

    return m_direction;

}

TimeInformation::List TimeQuery::query(const QString &stationId, const QStringList &lineNumbers, const QDateTime &dateTime)

{

    const TimeInformation::List information = queryInternal(stationId, dateTime);

    TimeInformation::List filteredInformation;

    if (!lineNumbers.isEmpty()) {

        for (int i = 0; i < information.count(); ++i) {

            const TimeInformation info = information.at(i);

            for (int j = 0; j < lineNumbers.count(); ++j) {

                if (info.direction().startsWith(QString("%1 ").arg(lineNumbers.at(j))))

                    filteredInformation.append(info);

            }

        }

    } else {

        filteredInformation = information;

    }

    return filteredInformation;

}

//! [1]

TimeInformation::List TimeQuery::queryInternal(const QString &stationId, const QDateTime &dateTime)

{

    const QString timesQueryUrl = QString("doc('http://wap.trafikanten.no/F.asp?f=%1&t=%2&m=%3&d=%4&start=1')/wml/card/p/small/a[fn:starts-with(@href, 'Rute')]/string()")

                                         .arg(stationId)

                                         .arg(dateTime.time().hour())

                                         .arg(dateTime.time().minute())

                                         .arg(dateTime.toString("dd.MM.yyyy"));

    const QString directionsQueryUrl = QString("doc('http://wap.trafikanten.no/F.asp?f=%1&t=%2&m=%3&d=%4&start=1')/wml/card/p/small/text()[matches(., '[0-9].*')]/string()")

                                              .arg(stationId)

                                              .arg(dateTime.time().hour())

                                              .arg(dateTime.time().minute())

                                              .arg(dateTime.toString("dd.MM.yyyy"));

    QStringList times;

    QStringList directions;

    QXmlQuery query;

    query.setQuery(timesQueryUrl);

    query.evaluateTo(&times);

    query.setQuery(directionsQueryUrl);

    query.evaluateTo(&directions);

    if (times.count() != directions.count()) // something went wrong...

        return TimeInformation::List();

    TimeInformation::List information;

    for (int i = 0; i < times.count(); ++i)

        information.append(TimeInformation(times.at(i).simplified(), directions.at(i).simplified()));

    return information;

}

//! [1]