/*
 *  eventlistmodel.h  -  model class for lists of alarms or templates
 *  Program:  kalarm
 *  Copyright © 2007-2009 by David Jarvie <djarvie@kde.org>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef EVENTLISTMODEL_H
#define EVENTLISTMODEL_H

#include "kalarm.h"

#include <QAbstractTableModel>
#include <QSortFilterProxyModel>
#include <QList>
#include <QSize>

#include "kcalendar.h"
#include "alarmresources.h"
#include "kaevent.h"

class QPixmap;
namespace KCal { class Event; }
class DateTime;
class KAEvent;


class EventListModel : public QAbstractTableModel
{
		Q_OBJECT
	public:
		enum Type
		{
			DISPLAY = 0x01,
			COMMAND = 0x02,
			EMAIL   = 0x04,
			AUDIO   = 0x08,
			ALL     = DISPLAY | COMMAND | EMAIL | AUDIO
		};
		enum {   // data columns
			TimeColumn, TimeToColumn, RepeatColumn, ColourColumn, TypeColumn, TextColumn,
			TemplateNameColumn,
			ColumnCount
		};
		enum {   // additional roles
			StatusRole = Qt::UserRole,  // return ACTIVE/ARCHIVED
			ValueRole,                  // return numeric value
			SortRole,                   // return the value to use for sorting
			EnabledRole                 // return true for enabled alarm, false for disabled
		};

		static EventListModel* alarms();
		static EventListModel* templates();
		~EventListModel();
		virtual int           rowCount(const QModelIndex& parent = QModelIndex()) const;
		virtual int           columnCount(const QModelIndex& parent = QModelIndex()) const;
		virtual QModelIndex   index(int row, int column = 0, const QModelIndex& parent = QModelIndex()) const;
		virtual QVariant      data(const QModelIndex&, int role = Qt::DisplayRole) const;
		virtual bool          setData(const QModelIndex&, const QVariant& value, int role = Qt::EditRole);
		virtual QVariant      headerData(int section, Qt::Orientation, int role = Qt::DisplayRole) const;
		virtual Qt::ItemFlags flags(const QModelIndex&) const;
		static int            iconWidth()       { return mIconSize.width(); }
		QModelIndex           eventIndex(const KAEvent*) const;
		QModelIndex           eventIndex(const QString& eventId) const;
		void                  addEvent(KAEvent*);
		void                  addEvents(const KAEvent::List&);
		bool                  updateEvent(KAEvent* event)           { return updateEvent(mEvents.indexOf(event)); }
		bool                  updateEvent(const QString& eventId)   { return updateEvent(findEvent(eventId)); }
		bool                  updateEvent(const QString& oldId, KAEvent* newEvent);
		void                  removeEvent(const KAEvent* event)     { removeEvent(mEvents.indexOf(const_cast<KAEvent*>(event))); }
		void                  removeEvent(const QString& eventId)   { removeEvent(findEvent(eventId)); }
		void                  removeResource(AlarmResource*);
		KAEvent*              event(int row) const;
		static KAEvent*       event(const QModelIndex&);
		void                  updateCommandError(const QString& eventId);
		bool                  haveEvents() const                   { return mHaveEvents; }
		static void           resourceStatusChanged(AlarmResource*, AlarmResources::Change);

	public slots:
		void                  reload();

	signals:
		void                  haveEventsStatus(bool have);

	private slots:
		void     slotUpdateTimeTo();
		void     slotUpdateArchivedColour(const QColor&);
		void     slotUpdateDisabledColour(const QColor&);
		void     slotUpdateHolidays();
		void     slotUpdateWorkingHours();
		void     slotResourceLoaded(AlarmResource*, bool active);
		void     slotResourceStatusChanged(AlarmResource*, AlarmResources::Change);

	private:
		explicit EventListModel(KCalEvent::Status, QObject* parent = 0);
		bool     updateEvent(int row);
		void     removeEvent(int row);
		int      findEvent(const QString& eventId) const;
		void     updateHaveEvents(bool have)        { mHaveEvents = have;  emit haveEventsStatus(have); }
		QString  alarmTimeText(const DateTime&) const;
		QString  timeToAlarmText(const DateTime&) const;
		QString  repeatText(const KAEvent*) const;
		QString  repeatOrder(const KAEvent*) const;
		QPixmap* eventIcon(const KAEvent*) const;
		QString  whatsThisText(int column) const;

		static EventListModel* mAlarmInstance;     // the instance containing all alarms
		static EventListModel* mTemplateInstance;  // the instance containing all templates
		static QPixmap* mTextIcon;
		static QPixmap* mFileIcon;
		static QPixmap* mCommandIcon;
		static QPixmap* mEmailIcon;
		static QPixmap* mAudioIcon;
		static QSize    mIconSize;      // maximum size of any icon
		static int      mTimeHourPos;   // position of hour within time string, or -1 if leading zeroes included

		KAEvent::List       mEvents;
		KCalEvent::Status   mStatus;    // types of events contained in this model
		bool                mHaveEvents;// there are events in this model

		using QObject::event;   // prevent "hidden" warning
};


class EventListFilterModel : public QSortFilterProxyModel
{
		Q_OBJECT
	public:
		explicit EventListFilterModel(EventListModel* baseModel, QObject* parent = 0);
		KAEvent* event(int row) const;
		KAEvent* event(const QModelIndex&) const;
	
	private slots:
		void     slotDataChanged(const QModelIndex&, const QModelIndex&);

	private:
		using QObject::event;   // prevent "hidden" warning
};

#endif // EVENTLISTMODEL_H

