/*
    KSysGuard, the KDE System Guard

	Copyright (c) 1999 - 2001 Chris Schlaeger <cs@kde.org>
	Copyright (c) 2006 John Tapsell <john.tapsell@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; version 2 of
    the License, or (at your option) version 3.

    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, see <http://www.gnu.org/licenses/>.
*/
#include <QDomElement>
#include <QTimer>
#include <QLineEdit>
#include <QTreeView>
#include <QCheckBox>
#include <QHeaderView>
#include <QStackedLayout>

#include <kdebug.h>

#include "ProcessController.moc"
#include "ProcessController.h"
#include "processui/ksysguardprocesslist.h"
#include "processes.h"

//#define DO_MODELCHECK
#ifdef DO_MODELCHECK
#include "modeltest.h"
#endif
ProcessController::ProcessController(QWidget* parent)
	: KSGRD::SensorDisplay(parent, QString::null, NULL)
{
	mProcessList = NULL;
	mProcesses = NULL;
}

void
ProcessController::sensorError(int, bool err)
{
	if (err == sensors().at(0)->isOk())
	{
		if (!err)
		{
		} else {
			kDebug() << "SensorError called with an error";
		}
		/* This happens only when the sensorOk status needs to be changed. */
		sensors().at(0)->setIsOk( !err );
	}
	setSensorOk(sensors().at(0)->isOk());
}

bool
ProcessController::restoreSettings(QDomElement& element)
{
	bool result = addSensor(element.attribute("hostName"),
				element.attribute("sensorName"),
				(element.attribute("sensorType").isEmpty() ? "table" : element.attribute("sensorType")),
				QString());
	if(!result) return false;

	int version = element.attribute("version", "0").toUInt();
	if(version == PROCESSHEADERVERSION) {  //If the header has changed, the old settings are no longer valid.  Only restore if version is the same
		mProcessList->restoreHeaderState(QByteArray::fromBase64(element.attribute("treeViewHeader").toLatin1()));
	}

	bool showTotals = element.attribute("showTotals", "1").toUInt();
	mProcessList->setShowTotals(showTotals);


	int units = element.attribute("units", QString::number((int)ProcessModel::UnitsKB)).toUInt();
	mProcessList->setUnits((ProcessModel::Units)units);

	bool showCommandLineOptions = element.attribute("showCommandLineOptions", "0").toUInt();
	mProcessList->processModel()->setShowCommandLineOptions(showCommandLineOptions);

	bool showTooltips = element.attribute("showTooltips", "1").toUInt();
	mProcessList->processModel()->setShowingTooltips(showTooltips);

	bool normalizeCPUUsage = element.attribute("normalizeCPUUsage", "1").toUInt();
	mProcessList->processModel()->setNormalizedCPUUsage(normalizeCPUUsage);

	int filterState = element.attribute("filterState", QString::number((int)ProcessFilter::AllProcesses)).toUInt();
	mProcessList->setState((ProcessFilter::State)filterState);

	SensorDisplay::restoreSettings(element);
	return result;
}

bool ProcessController::saveSettings(QDomDocument& doc, QDomElement& element)
{
	if(!mProcessList)
		return false;
	element.setAttribute("hostName", sensors().at(0)->hostName());
	element.setAttribute("sensorName", sensors().at(0)->name());
	element.setAttribute("sensorType", sensors().at(0)->type());

	element.setAttribute("version", QString::number(PROCESSHEADERVERSION));
	element.setAttribute("treeViewHeader", QString::fromLatin1(mProcessList->treeView()->header()->saveState().toBase64()));
	element.setAttribute("showTotals", mProcessList->showTotals()?1:0);
	
	element.setAttribute("units", (int)(mProcessList->units()));
	element.setAttribute("showCommandLineOptions", mProcessList->processModel()->isShowCommandLineOptions());
	element.setAttribute("showTooltips", mProcessList->processModel()->isShowingTooltips());
	element.setAttribute("normalizeCPUUsage", mProcessList->processModel()->isNormalizedCPUUsage());
	element.setAttribute("filterState", (int)(mProcessList->state()));

	SensorDisplay::saveSettings(doc, element);

	return true;
}

void ProcessController::answerReceived( int id, const QList<QByteArray>& answer ) {
	if(mProcesses)
		mProcesses->answerReceived(id, answer);
}

bool ProcessController::addSensor(const QString& hostName,
                                 const QString& sensorName,
                                 const QString& sensorType,
                                 const QString& title)
{
	if (sensorType != "table")
		return false;


	QStackedLayout *layout = new QStackedLayout(this);
	mProcessList = new KSysGuardProcessList(this, hostName);
	mProcessList->setContentsMargins(0,0,0,0);
	addActions(mProcessList->actions());
	connect(mProcessList, SIGNAL(updated()), this, SIGNAL(updated()));
	kDebug() << "mProcessList is " << mProcessList;

	layout->addWidget(mProcessList);

	/** To use a remote sensor, we need to drill down through the layers, to connect to the remote processes.  Then connect to its signals and slots.
	 *  It's horrible I know :( */
	if(!hostName.isEmpty() && hostName != "localhost") {
		KSysGuard::Processes *processes = mProcessList->processModel()->processController();
		mProcesses = processes;
		if(processes) {
			connect( processes, SIGNAL(runCommand(const QString &, int)), SLOT(runCommand(const QString &, int)));
		}

	}

		
	setPlotterWidget(mProcessList);

        QTimer::singleShot(0, mProcessList->filterLineEdit(), SLOT(setFocus()));

	registerSensor(new KSGRD::SensorProperties(hostName, sensorName, sensorType, title));
	/* This just triggers the first communication. The full set of
	* requests are send whenever the sensor reconnects (detected in
	* sensorError(). */
	sensors().at(0)->setIsOk(true); //Assume it is okay from the start
	setSensorOk(sensors().at(0)->isOk());
	return true;
}

void ProcessController::runCommand(const QString &command, int id) {
	sendRequest(sensors().at(0)->hostName(), command, id);
}

