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#include "qabstractdatetime_p.h"

#include "qcontextfns_p.h"

#include "qdate_p.h"

#include "qschemadatetime_p.h"

#include "qdaytimeduration_p.h"

#include "qpatternistlocale_p.h"

#include "qschematime_p.h"

#include "qtimezonefns_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

Item AdjustTimezone::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    enum

    {

        /**

         * The maximum zone offset, @c PT14H, in milli seconds.

         */

        MSecLimit = 14 * 60/*M*/ * 60/*S*/ * 1000/*ms*/

    };

    const Item arg(m_operands.first()->evaluateSingleton(context));

    if(!arg)

        return Item();

    QDateTime dt(arg.as<AbstractDateTime>()->toDateTime());

    // TODO DT dt.setDateOnly(false);

    Q_ASSERT(dt.isValid());

    DayTimeDuration::Ptr tz;

    if(m_operands.count() == 2)

        tz = DayTimeDuration::Ptr(m_operands.at(1)->evaluateSingleton(context).as<DayTimeDuration>());

    else

        tz = context->implicitTimezone();

    if(tz)

    {

        const MSecondCountProperty tzMSecs = tz->value();

        if(tzMSecs % (1000 * 60) != 0)

        {

            context->error(QtXmlPatterns::tr("A zone offset must be in the "

                                             "range %1..%2 inclusive. %3 is "

                                             "out of range.")

                           .arg(formatData("-PT14H"))

                           .arg(formatData("PT14H"))

                           .arg(formatData(tz->stringValue())),

                           ReportContext::FODT0003, this);

            return Item();

        }

        else if(tzMSecs > MSecLimit ||

                tzMSecs < -MSecLimit)

        {

            context->error(QtXmlPatterns::tr("%1 is not a whole number of minutes.")

                                            .arg(formatData(tz->stringValue())),

                                       ReportContext::FODT0003, this);

            return Item();

        }

        const SecondCountProperty tzSecs = tzMSecs / 1000;

        if(dt.timeSpec() == Qt::LocalTime) /* $arg has no time zone. */

        {

            /* "If $arg does not have a timezone component and $timezone is not

             * the empty sequence, then the result is $arg with $timezone as

             * the timezone component." */

            //dt.setTimeSpec(QDateTime::Spec(QDateTime::OffsetFromUTC, tzSecs));

            dt.setUtcOffset(tzSecs);

            Q_ASSERT(dt.isValid());

            return createValue(dt);

        }

        else

        {

            /* "If $arg has a timezone component and $timezone is not the empty sequence,

             * then the result is an xs:dateTime value with a timezone component of

             * $timezone that is equal to $arg." */

            dt = dt.toUTC();

            dt = dt.addSecs(tzSecs);

            //dt.setTimeSpec(QDateTime::Spec(QDateTime::OffsetFromUTC, tzSecs));

            dt.setUtcOffset(tzSecs);

            Q_ASSERT(dt.isValid());

            return createValue(dt);

        }

    }

    else

    { /* $timezone is the empty sequence. */

        if(dt.timeSpec() == Qt::LocalTime) /* $arg has no time zone. */

        {

            /* "If $arg does not have a timezone component and $timezone is

             * the empty sequence, then the result is $arg." */

            return arg;

        }

        else

        {

            /* "If $arg has a timezone component and $timezone is the empty sequence,

             * then the result is the localized value of $arg without its timezone component." */

            dt.setTimeSpec(Qt::LocalTime);

            return createValue(dt);

        }

    }

}

Item AdjustDateTimeToTimezoneFN::createValue(const QDateTime &dt) const

{

    Q_ASSERT(dt.isValid());

    return DateTime::fromDateTime(dt);

}

Item AdjustDateToTimezoneFN::createValue(const QDateTime &dt) const

{

    Q_ASSERT(dt.isValid());

    return Date::fromDateTime(dt);

}

Item AdjustTimeToTimezoneFN::createValue(const QDateTime &dt) const

{

    Q_ASSERT(dt.isValid());

    return SchemaTime::fromDateTime(dt);

}

QT_END_NAMESPACE