/**********************************************************************
** Copyright (C) 2000 Trolltech AS.  All rights reserved.
**
** This file is part of Qtopia Environment.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#include "timestring.h"
#include <qobject.h>
#include "qpeapplication.h" //for qApp
#include "config.h"


class TimeStringFormatKeeper : public QObject
{
    Q_OBJECT
public:
    static DateFormat currentFormat()
    {
	if ( !self )
	    self  = new TimeStringFormatKeeper;
	return self->format;
    }
private slots:
    void formatChanged( DateFormat f )
    {
	format = f;
    }
private:
    static TimeStringFormatKeeper *self;
    DateFormat format;

    TimeStringFormatKeeper()
	: QObject( qApp )
    {
	Config config("qpe");
	config.setGroup( "Date" );
	format = DateFormat(QChar(config.readEntry("Separator", "/")[0]),
		(DateFormat::Order)config .readNumEntry("ShortOrder", DateFormat::DayMonthYear), 
		(DateFormat::Order)config.readNumEntry("LongOrder", DateFormat::DayMonthYear));

	connect( qApp, SIGNAL( dateFormatChanged(DateFormat) ),
		 this, SLOT( formatChanged( DateFormat ) ) );
    }
};

TimeStringFormatKeeper *TimeStringFormatKeeper::self = 0;

QString DateFormat::toNumberString() const
{
    QString buf = "";
    // for each part of the order
    for (int i = 0; i < 3; i++) {
	// switch on the relavent 3 bits.
	switch((_shortOrder >> (i * 3)) & 0x0007) { 
	    case 0x0001:
		buf += QObject::tr( "D" );
		break;
	    case 0x0002:
		buf += QObject::tr( "M" );
		break;
	    case 0x0004:
		buf += QObject::tr( "Y" );
		break;
	}
	if (i < 2)
	    buf += _shortSeparator;
    }
    return buf;
}

QString DateFormat::toWordString() const
{
    QString buf = "";
    // for each part of the order
    for (int i = 0; i < 3; i++) {
	// switch on the relavent 3 bits.
	switch((_longOrder >> (i * 3)) & 0x0007) { 
	    case 0x0001:
		buf += QObject::tr( "day" );
		if (i < 2) { 
		    if ((_shortOrder << ((i+1) * 3)) & 0x0007)
			buf += ", ";
		    else 
			buf += " ";
		}
		break;
	    case 0x0002:
		buf += QObject::tr( "month" );
		if (i < 2) 
		    buf += " ";
		break;
	    case 0x0004:
		buf += QObject::tr( "year" );
		if (i < 2) 
		    buf += ", ";
		break;
	}
    }
    return buf;
}

QString DateFormat::numberDate(const QDate &d, int v) const
{
    QString buf = "";

    int pad = 0;
    if (v & padNumber)
	pad = 2;

    // for each part of the order
    for (int i = 0; i < 3; i++) {
	// switch on the relavent 3 bits.
	switch((_shortOrder >> (i * 3)) & 0x0007) { 
	    case 0x0001:
		buf += QString("%1").arg(d.day(), pad);
		break;
	    case 0x0002:
		buf += QString("%1").arg(d.month(), pad);
		break;
	    case 0x0004:
		{
		    int year = d.year();
		    if (!(v & longNumber))
			year = year % 100;

		    if (year < 10)
			buf += "0";

		    buf += QString::number(year);

		}
		break;
	}
	if (i < 2)
	    buf = _shortSeparator;
    }
    return buf;
}

QString DateFormat::wordDate(const QDate &d, int v) const
{
    QString buf = "";
    // for each part of the order
    if (v & showWeekDay) {
	QString weekDay = d.dayName(d.dayOfWeek());
	if (!(v & longWord)) {
	    weekDay = weekDay.left(3);
	}
	buf += weekDay;
	if (_longOrder & 0x0007 == 0x0002)
	    buf += ' ';
	else 
	    buf += ", ";
    }

    int pad = 0;
    if (v & padNumber)
	pad = 2;

    for (int i = 0; i < 3; i++) {
	// switch on the relavent 3 bits.
	switch((_longOrder >> (i * 3)) & 0x0007) { 
	    case 0x0001:
		buf += QString("%1").arg(d.day(), pad);
		if (i < 2) { 
		    if ((_shortOrder << ((i+1) * 3)) & 0x0007)
			buf += ", ";
		    else 
			buf += " ";
		}
		break;
	    case 0x0002:
		{
		    QString monthName = d.monthName(d.month());
		    if (!(v & longWord)) {
			monthName = monthName.left(3);
		    }
		    buf += monthName;
		}
		if (i < 2) 
		    buf += " ";
		break;
	    case 0x0004:
		{
		    int year = d.year();
		    if (!(v & longNumber))
			year = year % 100;

		    if (year < 10)
			buf += "0";

		    buf += QString::number(year);
		}
		if (i < 2) 
		    buf += ", ";
		break;
	}
    }
    return buf;
}

#ifndef QT_NO_DATASTREAM
void DateFormat::save(QDataStream &d) const
{
    d << _shortSeparator.unicode();
    uint v= _shortOrder;
    d << v;
    v = _longOrder;
    d << v;
}

void DateFormat::load(QDataStream &d) 
{
    ushort value;
    d >> value;
    _shortSeparator = QChar(value);
    uint v = 0;
    d >> v;
    _shortOrder = (Order)v;
    v = 0;
    d >> v;
    _longOrder = (Order)v;
}

QDataStream &operator<<(QDataStream &s, const DateFormat&df)
{
        df.save(s);
	    return s;
}
QDataStream &operator>>(QDataStream &s, DateFormat&df)
{
        df.load(s);
	    return s;
}
#endif

QString TimeString::shortDate( const QDate &d, DateFormat dtf )
{
    return dtf.wordDate(d);
}

QString TimeString::dateString( const QDate &d, DateFormat dtf )
{
    return dtf.wordDate(d, DateFormat::longNumber | DateFormat::longWord);
}


QString TimeString::longDateString( const QDate &d, DateFormat dtf )
{
    return dtf.wordDate(d, DateFormat::showWeekDay | DateFormat::longNumber 
	    | DateFormat::longWord);
}

DateFormat TimeString::currentDateFormat()
{
    return TimeStringFormatKeeper::currentFormat();
}


QString TimeString::dateString( const QDateTime &dt, bool ampm, bool seconds, DateFormat dtf )
{
    const QDate& d = dt.date();
    const QTime& t = dt.time();

    // based on QDateTime::toString()
    QString buf = timeString(t,ampm,seconds);
    buf += " ";
    buf += longDateString( d, dtf );

    return buf;
}

QString TimeString::timeString( const QTime &t, bool ampm, bool seconds )
{
    if ( !ampm ) {
	if ( seconds )
	    return t.toString();
	QString r = QString::number(t.hour());
	if ( t.hour() < 10 ) r.prepend( "0" );
	r.append( ":" );
	if ( t.minute() < 10 ) r.append( "0" );
	r.append(QString::number(t.minute()));
	return r;
    }
    // ### else the hard case that should disappear in Qt 3.0
    QString argString = seconds ? "%4:%5:%6 %7" : "%4:%5 %7";
    int hour = t.hour();
    QString strMin = QString::number( t.minute() );
    QString strSec = QString::number( t.second() );
    if ( hour > 12 )
	argString = argString.arg( hour - 12, 2 );
    else {
        if ( hour == 0 )
	    argString = argString.arg( 12 );
        else
	    argString = argString.arg( hour, 2 );
    }
    if ( t.minute() < 10 )
	strMin.prepend( "0" );
    if ( t.second() < 10 )
	strSec.prepend( "0" );
    argString = argString.arg( strMin );
    if ( seconds )
	argString = argString.arg( strSec );
    if ( hour >= 12 )
	argString = argString.arg( QObject::tr("PM") );
    else
	argString = argString.arg( QObject::tr("AM") );
    return argString;
}

QString TimeString::shortTime( bool ampm, bool seconds )
{
    static const char* const day[] = {
	    QT_TRANSLATE_NOOP( "QObject", "Mon" ),
	    QT_TRANSLATE_NOOP( "QObject", "Tue" ),
	    QT_TRANSLATE_NOOP( "QObject", "Wed" ),
	    QT_TRANSLATE_NOOP( "QObject", "Thu" ),
	    QT_TRANSLATE_NOOP( "QObject", "Fri" ),
	    QT_TRANSLATE_NOOP( "QObject", "Sat" ),
	    QT_TRANSLATE_NOOP( "QObject", "Sun" )
    };
    // just create a shorter time String
    QDateTime dtTmp = QDateTime::currentDateTime();
    QString strTime;
    strTime = QObject::tr( day[dtTmp.date().dayOfWeek()-1] ) + " " +
    timeString( dtTmp.time(), ampm, seconds );
    return strTime;
}

QString TimeString::dateString( const QDateTime &t, bool ampm )
{
    return dateString(t,ampm,FALSE);
}

QString TimeString::timeString( const QTime &t, bool ampm)
{
    return timeString(t,ampm,FALSE);
}

QString TimeString::shortTime( bool ampm )
{
    return shortTime(ampm,FALSE);
}

#include "timestring.moc"