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#ifndef QDATETIME_P_H
#define QDATETIME_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "qplatformdefs.h"
#include "QtCore/qatomic.h"
#include "QtCore/qdatetime.h"
#include "QtCore/qpair.h"

#include "qtimezone.h"

QT_BEGIN_NAMESPACE

class QDateTimePrivate
{
public:
    // Never change or delete this enum, it is required for backwards compatible
    // serialization of QDateTime before 5.2, so is essentially public API
    enum Spec {
        LocalUnknown = -1,
        LocalStandard = 0,
        LocalDST = 1,
        UTC = 2,
        OffsetFromUTC = 3,
        TimeZone = 4
    };

    // Daylight Time Status
    enum DaylightStatus {
        UnknownDaylightTime = -1,
        StandardTime = 0,
        DaylightTime = 1
    };

    // Status of date/time
    enum StatusFlag {
        ShortData           = 0x01,

        ValidDate           = 0x02,
        ValidTime           = 0x04,
        ValidDateTime       = 0x08,

        TimeSpecMask        = 0x30,

        SetToStandardTime   = 0x40,
        SetToDaylightTime   = 0x80
    };
    Q_DECLARE_FLAGS(StatusFlags, StatusFlag)

    enum {
        TimeSpecShift = 4,
        ValidityMask        = ValidDate | ValidTime | ValidDateTime,
        DaylightMask        = SetToStandardTime | SetToDaylightTime
    };

    QDateTimePrivate() : m_msecs(0),
                         m_status(StatusFlag(Qt::LocalTime << TimeSpecShift)),
                         m_offsetFromUtc(0),
                         ref(0)
    {
    }

    QDateTimePrivate(const QDate &toDate, const QTime &toTime, Qt::TimeSpec toSpec,
                     int offsetSeconds);

#ifndef QT_BOOTSTRAPPED
    QDateTimePrivate(const QDate &toDate, const QTime &toTime, const QTimeZone & timeZone);
#endif // QT_BOOTSTRAPPED

    qint64 m_msecs;
    StatusFlags m_status;
    int m_offsetFromUtc;
    mutable QAtomicInt ref;
#ifndef QT_BOOTSTRAPPED
    QTimeZone m_timeZone;
#endif // QT_BOOTSTRAPPED

    void setTimeSpec(Qt::TimeSpec spec, int offsetSeconds);
    void setDateTime(const QDate &date, const QTime &time);
    QPair<QDate, QTime> getDateTime() const;

    void setDaylightStatus(DaylightStatus status);
    DaylightStatus daylightStatus() const;

    // Returns msecs since epoch, assumes offset value is current
    inline qint64 toMSecsSinceEpoch() const;

    void checkValidDateTime();
    void refreshDateTime();

    // Get/set date and time status
    inline bool isValidDate() const { return m_status & ValidDate; }
    inline bool isValidTime() const { return m_status & ValidTime; }
    inline bool isValidDateTime() const { return m_status & ValidDateTime; }
    inline void setValidDateTime() { m_status |= ValidDateTime; }
    inline void clearValidDateTime() { m_status &= ~ValidDateTime; }
    inline void clearSetToDaylightStatus() { m_status &= ~(SetToStandardTime | SetToDaylightTime); }

    inline Qt::TimeSpec spec() const { return Qt::TimeSpec((m_status & TimeSpecMask) >> TimeSpecShift); }
    inline void setSpec(Qt::TimeSpec spec)
    { m_status  &= ~TimeSpecMask; m_status |= StatusFlag(uint(spec) << TimeSpecShift); }

#ifndef QT_BOOTSTRAPPED
    static qint64 zoneMSecsToEpochMSecs(qint64 msecs, const QTimeZone &zone,
                                        QDate *localDate = 0, QTime *localTime = 0);
#endif // QT_BOOTSTRAPPED

    static inline qint64 minJd() { return QDate::minJd(); }
    static inline qint64 maxJd() { return QDate::maxJd(); }
};

QT_END_NAMESPACE

#endif // QDATETIME_P_H