/**
 * @file ScosTime/gui.h
 * @brief GUI for the ScosTime application
 * @author Enar Vaikene
 *
 * Copyright (c) 2012 Enar Vaikene
 *
 * This file is part of the eVaf C++ cross-platform application development framework.
 *
 * This file can be used under the terms of the GNU General Public License
 * version 3.0 as published by the Free Software Foundation and appearing in
 * the file LICENSE included in the packaging of this file. Please review the
 * the following information to ensure the GNU General Public License version
 * 3.0 requirements will be met: http://www.gnu.org/copyleft/gpl.html.
 *
 * Alternatively, this file may be used in accordance with the Commercial License
 * Agreement provided with the Software.
 */

#ifndef __SCOSTIME_GUI_H
#  define __SCOSTIME_GUI_H

#include <Plugins/iPlugin>

#include <QObject>
#include <QString>
#include <QDateTime>

class QLineEdit;
class QComboBox;
class QRegExp;
class QPushButton;

namespace eVaf {
namespace ScosTime {

namespace Internal {

/**
 * SCOS date/time class
 */
class DateTime
{
public:

    /**
     * Creates an invalid date/time value
     */
    DateTime() {}

    /**
     * Creates a date/time value from the string.
     * @param s Input string
     * @param epoch Epoch
     *
     * The input string can be:
     * @li Date/time in ISO format yyyy-MM-ddThh:mm[:ss[.zzz]]
     * @li Date/time in ASD format yyyy.ddd.hh.mm[.ss[.zzz]]
     * @li CUC hex string cccccccc[ffff]
     *
     * If the string is invalid, creates an invalid date/time value.
     */
    DateTime(String const & s, String const & epoch);

    /**
     * Returns true if the date/time value is valid.
     */
    bool isValid() const { return mDateTime.isValid(); }

    /**
     * Returns the date/time value a string in the ISO format yyyy-MM-ddThh:mm:ss.zzz
     */
    QString asIsoString() const;

    /**
     * Returns the date/time value as a string in the ASD format yyyy.ddd.hh.mm.ss.zzz
     */
    QString asAsdString() const;

    /**
     * Returns the date/time value as a CUC hex string in the format ccccccccffff
     */
    QString asCucHexString() const;


private:

    /// Date/time value
    QDateTime mDateTime;

    /// Epoch
    QDateTime mEpoch;

};

} // namespace eVaf::ScosTime::Internal

/**
 * Graphical User Interface for the ScosTime application.
 *
 * This module adds a GUI window to the ScosTime application using the SdiWindow module.
 */
class Module : public Plugins::iPlugin
{
    Q_OBJECT
    Q_INTERFACES(eVaf::Plugins::iPlugin)

    enum DateTimeType
    {
        InvalidDateTime,
        AsdDateTime,
        IsoDateTime
    };

    enum ValidEntry
    {
        NoValidEntry,
        DateTimeEntry,
        CUCEntry
    };

public:

    Module();

    virtual ~Module();

    virtual bool init(const QString & args);

    virtual void done();

    virtual bool isReady() const { return mReady; }


private slots:

    void epochChanged(QString const & s);

    void dateTimeClicked();

    void dateTimeEdited(QString const & s);

    void cucHexEdited(QString const & s);


private: // Methods

    DateTimeType getDateTimeType(QString const & s) const;

    QDateTime strToDateTime(QString const & s, DateTimeType type) const;

    QString dateTimeToAsdStr(QDateTime const & tm) const;

    void setDateTimeFromCucHex(QString const & s);

    void setCucHexFromDateTime(QString const & s, DateTimeType type);


private: // Members

    /// Flag indicating that the module is ready
    bool mReady;

    /// Last valid entry (field modified by the user)
    ValidEntry mLastValidEntry;

    /// Regular expressions
    QRegExp * rxIsoDateTime;
    QRegExp * rxAsdDateTime;

    /// Widgets on the screen
    QComboBox * wEpoch;
    QLineEdit * wDateTime;
    QPushButton * wConvertDateTime;
    QLineEdit * wCucHex;

};

} // namespace eVaf::ScosTime
} // namespace eVaf

#endif // gui.h