/***************************************************************************
 *   Copyright (C) 2003-2005 by David Saxton                               *
 *   david@bluehaze.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.                                   *
 ***************************************************************************/

#include "canvasmanipulator.h"
#include "circuitdocument.h"
#include "circuiticndocument.h"
#include "circuitview.h"
#include "component.h"
#include "connector.h"
#include "cnitemgroup.h"
#include "documentiface.h"
#include "drawparts/drawpart.h"
#include "ecnode.h"
#include "itemdocumentdata.h"
#include "ktechlab.h"
#include "pin.h"
#include "simulator.h"
#include "subcircuits.h"
#include "switch.h"

#include <kdebug.h>
#include <kinputdialog.h> 
#include <klocalizedstring.h>
#include <kmessagebox.h>
#include <kactionmenu.h>

#include <qregexp.h>
#include <qtimer.h>

#include <ktlconfig.h>


CircuitDocument::CircuitDocument( const QString & caption, const char *name )
	: CircuitICNDocument( caption, name )
{
	m_pOrientationAction = new KActionMenu( KIcon("transform-rotate"), i18n("Orientation"), this );
	
	m_type = Document::dt_circuit;
	m_pDocumentIface = new CircuitDocumentIface(this);
	m_fileExtensionInfo = QString("*.circuit|%1(*.circuit)\n*|%2").arg( i18n("Circuit") ).arg( i18n("All Files") );
	
	m_cmManager->addManipulatorInfo( CMSelect::manipulatorInfo() );
	m_cmManager->addManipulatorInfo( CMDraw::manipulatorInfo() );
	m_cmManager->addManipulatorInfo( CMRightClick::manipulatorInfo() );
	m_cmManager->addManipulatorInfo( CMRepeatedItemAdd::manipulatorInfo() );
	m_cmManager->addManipulatorInfo( CMItemResize::manipulatorInfo() );
	m_cmManager->addManipulatorInfo( CMItemDrag::manipulatorInfo() );
	
	connect( this, SIGNAL(connectorAdded(Connector*)), this, SLOT(requestAssignCircuits()) );
	connect( this, SIGNAL(connectorAdded(Connector*)), this, SLOT(connectorAdded(Connector*)) );
	
	m_updateCircuitsTmr = new QTimer();
	connect( m_updateCircuitsTmr, SIGNAL(timeout()), this, SLOT(assignCircuits()) );
	
	requestStateSave();
}

CircuitDocument::~CircuitDocument()
{
	m_bDeleted = true;

    disconnect( m_updateCircuitsTmr, SIGNAL(timeout()), this, SLOT(assignCircuits()) );
    disconnect( this, SIGNAL(connectorAdded(Connector*)), this, SLOT(connectorAdded(Connector*)) );
    disconnect( this, SIGNAL(connectorAdded(Connector*)), this, SLOT(requestAssignCircuits()) );

    for (ConnectorList::Iterator itConn = m_connectorList.begin(); itConn != m_connectorList.end(); ++itConn) {
        Connector *connector = itConn->data();
        disconnect( connector, SIGNAL(removed(Connector*)), this, SLOT(requestAssignCircuits()) );
    }
    for (ItemMap::Iterator itItem = m_itemList.begin(); itItem != m_itemList.end(); ++itItem) {
        Item *item = itItem.data();
        disconnect( item, SIGNAL(removed(Item*)), this, SLOT(componentRemoved(Item*)) );
        disconnect( item, SIGNAL(elementDestroyed(Element*)), this, SLOT(requestAssignCircuits()) );
    }

    deleteCircuits();
	
	delete m_updateCircuitsTmr;
	delete m_pDocumentIface;
}


void CircuitDocument::slotInitItemActions( )
{
	CircuitICNDocument::slotInitItemActions();
	
	CircuitView *activeCircuitView = dynamic_cast<CircuitView*>(activeView());

	if ( !KTechlab::self() || !activeCircuitView ) return;
	
	Component *item = dynamic_cast<Component*>( m_selectList->activeItem() );
	
	if ( !item && m_selectList->count() > 0 || !m_selectList->itemsAreSameType() )
		return;
	
	QAction * orientation_actions[] = {
		activeCircuitView->actionByName("edit_orientation_0"),
		activeCircuitView->actionByName("edit_orientation_90"),
		activeCircuitView->actionByName("edit_orientation_180"),
		activeCircuitView->actionByName("edit_orientation_270") };

	if ( !item )
	{
		for ( unsigned i = 0; i < 4; ++i )
			orientation_actions[i]->setEnabled(false);
		return;
	}

	for ( unsigned i = 0; i < 4; ++ i)
	{
		orientation_actions[i]->setEnabled(true);
		m_pOrientationAction->removeAction( orientation_actions[i] );
		m_pOrientationAction->addAction( orientation_actions[i] );
	}
	
	if ( item->angleDegrees() == 0 )
		(static_cast<KToggleAction*>( orientation_actions[0] ))->setChecked(true);
	else if ( item->angleDegrees() == 90 )
		(static_cast<KToggleAction*>( orientation_actions[1] ))->setChecked(true);
	else if ( item->angleDegrees() == 180 )
		(static_cast<KToggleAction*>( orientation_actions[2] ))->setChecked(true);
	else if ( item->angleDegrees() == 270 )
		(static_cast<KToggleAction*>( orientation_actions[3] ))->setChecked(true);
}


void CircuitDocument::rotateCounterClockwise()
{
	m_selectList->slotRotateCCW();
	requestRerouteInvalidatedConnectors();
}

void CircuitDocument::rotateClockwise()
{
	m_selectList->slotRotateCW();
	requestRerouteInvalidatedConnectors();
}

void CircuitDocument::flipHorizontally()
{
	m_selectList->flipHorizontally();
	requestRerouteInvalidatedConnectors();
}

void CircuitDocument::flipVertically()
{
	m_selectList->flipVertically();
	requestRerouteInvalidatedConnectors();
}

void CircuitDocument::setOrientation0()
{
	m_selectList->slotSetOrientation0();
	requestRerouteInvalidatedConnectors();
}

void CircuitDocument::setOrientation90()
{
	m_selectList->slotSetOrientation90();
	requestRerouteInvalidatedConnectors();
}

void CircuitDocument::setOrientation180()
{
	m_selectList->slotSetOrientation180();
	requestRerouteInvalidatedConnectors();
}

void CircuitDocument::setOrientation270()
{
	m_selectList->slotSetOrientation270();
	requestRerouteInvalidatedConnectors();
}


View *CircuitDocument::createView( ViewContainer *viewContainer, uint viewAreaId, const char *name )
{
	View *view = new CircuitView( this, viewContainer, viewAreaId, name );
	handleNewView(view);
	return view;
}


void CircuitDocument::slotUpdateConfiguration()
{
	CircuitICNDocument::slotUpdateConfiguration();
	
	ECNodeMap::iterator nodeEnd = m_ecNodeList.end();
	for ( ECNodeMap::iterator it = m_ecNodeList.begin(); it != nodeEnd; ++it )
	{
		ECNode * n = *it; // static_cast<ECNode*>(*it);
		n->setShowVoltageBars( KTLConfig::showVoltageBars() );
		n->setShowVoltageColor( KTLConfig::showVoltageColor() );
	}
	
	ConnectorList::iterator connectorsEnd = m_connectorList.end();
	for ( ConnectorList::iterator it = m_connectorList.begin(); it != connectorsEnd; ++it )
		(*it)->updateConnectorLines();
	
	ComponentList::iterator componentsEnd = m_componentList.end();
	for ( ComponentList::iterator it = m_componentList.begin(); it != componentsEnd; ++it )
		(*it)->slotUpdateConfiguration();
}


void CircuitDocument::update()
{
	CircuitICNDocument::update();

	bool animWires = KTLConfig::animateWires();

	if ( KTLConfig::showVoltageColor() || animWires )
	{
		if ( animWires )
		{
			// Wire animation is for showing currents, so we need to recalculate the currents
			// in the wires.
			calculateConnectorCurrents();
		}

		ConnectorList::iterator end = m_connectorList.end();
		for ( ConnectorList::iterator it = m_connectorList.begin(); it != end; ++it )
		{
			(*it)->incrementCurrentAnimation( 1.0 / double(KTLConfig::refreshRate()) );
			(*it)->updateConnectorLines( animWires );
		}
	}

	if ( KTLConfig::showVoltageColor() || KTLConfig::showVoltageBars() )
	{	
		ECNodeMap::iterator end = m_ecNodeList.end();
		for ( ECNodeMap::iterator it = m_ecNodeList.begin(); it != end; ++it )
		{
			// static_cast<ECNode*>(*it)->setNodeChanged();
			(*it)->setNodeChanged();
		}
	}
}


void CircuitDocument::fillContextMenu( const QPoint &pos )
{
	CircuitICNDocument::fillContextMenu(pos);

	CircuitView *activeCircuitView = dynamic_cast<CircuitView*>(activeView());

	if ( !activeCircuitView ) return;

	bool canCreateSubcircuit = (m_selectList->count() > 1 && countExtCon(m_selectList->items()) > 0);
	QAction * subcircuitAction = activeCircuitView->actionByName("circuit_create_subcircuit");
	subcircuitAction->setEnabled( canCreateSubcircuit );

	if ( m_selectList->count() < 1 ) return;

	Component *item = dynamic_cast<Component*>( selectList()->activeItem() );

	// NOTE: I negated this whole condition because I couldn't make out quite what the
	//logic was --electronerd
	if (!( !item && m_selectList->count() > 0 || !m_selectList->itemsAreSameType() ))
	{	
		QAction * orientation_actions[] = {
			activeCircuitView->actionByName("edit_orientation_0"),
			activeCircuitView->actionByName("edit_orientation_90"),
			activeCircuitView->actionByName("edit_orientation_180"),
			activeCircuitView->actionByName("edit_orientation_270") };

		if ( !item ) return;

		for ( unsigned i = 0; i < 4; ++ i)
		{
			m_pOrientationAction->removeAction( orientation_actions[i] );
			m_pOrientationAction->addAction( orientation_actions[i] );
		}

		QList<QAction*> orientation_actionlist;
	// 	orientation_actionlist.prepend( new KActionSeparator() );
		orientation_actionlist.append( m_pOrientationAction );
		KTechlab::self()->plugActionList( "orientation_actionlist", orientation_actionlist );
	}
}


void CircuitDocument::deleteCircuits()
{
	const CircuitList::iterator end = m_circuitList.end();
	for ( CircuitList::iterator it = m_circuitList.begin(); it != end; ++it )
	{
        if (!Simulator::isDestroyedSim()) {
            Simulator::self()->detachCircuit(*it);
        }
		delete *it;
	}
	m_circuitList.clear();
	m_pinList.clear();
	m_wireList.clear();
}


void CircuitDocument::requestAssignCircuits()
{
// 	kDebug() << k_funcinfo << endl;
    if (m_bDeleted) {
        return;
    }
	deleteCircuits();
	m_updateCircuitsTmr->stop();
	m_updateCircuitsTmr->start( 0, true );
}


void CircuitDocument::connectorAdded( Connector * connector )
{
	if (connector) {
		connect( connector, SIGNAL(numWiresChanged(unsigned )), this, SLOT(requestAssignCircuits()) );
		connect( connector, SIGNAL(removed(Connector*)), this, SLOT(requestAssignCircuits()) );
	}
}


void CircuitDocument::itemAdded( Item * item)
{
	CircuitICNDocument::itemAdded( item );
	componentAdded( item );
}


void CircuitDocument::componentAdded( Item * item )
{
	Component *component = dynamic_cast<Component*>(item);

	if (!component) return;

	requestAssignCircuits();

	connect( component, SIGNAL(elementCreated(Element*)), this, SLOT(requestAssignCircuits()) );
	connect( component, SIGNAL(elementDestroyed(Element*)), this, SLOT(requestAssignCircuits()) );
	connect( component, SIGNAL(removed(Item*)), this, SLOT(componentRemoved(Item*)) );

	// We don't attach the component to the Simulator just yet, as the
	// Component's vtable is not yet fully constructed, and so Simulator can't
	// tell whether or not it is a logic component
	if ( !m_toSimulateList.contains(component) )
		m_toSimulateList << component;
}


void CircuitDocument::componentRemoved( Item * item )
{
	Component *component = dynamic_cast<Component*>(item);

	if (!component) return;

	m_componentList.remove( component );
	m_toSimulateList.remove( component );

	requestAssignCircuits();

    if (!Simulator::isDestroyedSim()) {
        Simulator::self()->detachComponent(component);
    }
}

// I think this is where the inf0z from cnodes/branches is moved into the midle-layer
// pins/wires. 

void CircuitDocument::calculateConnectorCurrents()
{
	const CircuitList::iterator circuitEnd = m_circuitList.end();
	for ( CircuitList::iterator it = m_circuitList.begin(); it != circuitEnd; ++it )
		(*it)->updateCurrents();

	PinList groundPins;

	// Tell the Pins to reset their calculated currents to zero
	m_pinList.remove((Pin*)0);

	const PinList::iterator pinEnd = m_pinList.end();
	for ( PinList::iterator it = m_pinList.begin(); it != pinEnd; ++it )
	{
		if ( Pin *n = dynamic_cast<Pin*>((Pin*)*it) ) {
			n->resetCurrent();
			n->setSwitchCurrentsUnknown();

			if ( !n->parentECNode()->isChildNode() ) {
				n->setCurrentKnown( true );
				// (and it has a current of 0 amps)
			} else if ( n->groundType() == Pin::gt_always ) {
				groundPins << n;
				n->setCurrentKnown( false );
			} else {
				// Child node that is non ground
				n->setCurrentKnown( n->parentECNode()->numPins() < 2 );
			}
		}
	}
	
	
	// Tell the components to update their ECNode's currents' from the elements
// currents are merged into PINS. 
	const ComponentList::iterator componentEnd = m_componentList.end();
	for ( ComponentList::iterator it = m_componentList.begin(); it != componentEnd; ++it )
		(*it)->setNodalCurrents();


	// And now for the wires and switches...
	m_wireList.remove((Wire*)0);
	const WireList::iterator clEnd = m_wireList.end();
	for ( WireList::iterator it = m_wireList.begin(); it != clEnd; ++it )
		(*it)->setCurrentKnown(false);
	
	SwitchList switches = m_switchList;
	WireList wires = m_wireList;
	bool found = true;
	while ( (!wires.isEmpty() || !switches.isEmpty() || !groundPins.isEmpty()) && found )
	{
		found = false;
		
		for ( WireList::iterator itW = wires.begin(); itW != wires.end(); )
		{
			if ( (*itW)->calculateCurrent() )
			{
				found = true;
				itW = wires.erase(itW);
                // note: assigning a temporary interator, incrementing and erasing, seems to crash
			} else {
                ++itW;
            }
		}
		
		SwitchList::iterator switchesEnd = switches.end();
		for ( SwitchList::iterator it = switches.begin(); it != switchesEnd; )
		{
			if ( (*it)->calculateCurrent() )
			{
				found = true;
                // note: assigning a temporary interator, incrementing and erasing, seems to crash
                // it = container.erase( it ) seems to crash other times
				SwitchList::iterator oldIt = it;
				++it;
				switches.remove(oldIt);
			} else ++it;
		}

/*
make the ground pins work. Current engine doesn't treat ground explicitly. 
*/

		PinList::iterator groundPinsEnd = groundPins.end();
		for ( PinList::iterator it = groundPins.begin(); it != groundPinsEnd; ) {
			if ( (*it)->calculateCurrentFromWires() ) {
				found = true;
                // note: assigning a temporary interator, incrementing and erasing, seems to crash sometimes;
                // it = container.erase( it ) seems to crash other times
				PinList::iterator oldIt = it;
				++it;
				groundPins.remove(oldIt);
			} else ++it;
		}
	}
}


void CircuitDocument::assignCircuits()
{
	// Now we can finally add the unadded components to the Simulator
	const ComponentList::iterator toSimulateEnd = m_toSimulateList.end();
	for ( ComponentList::iterator it = m_toSimulateList.begin(); it != toSimulateEnd; ++it )
		Simulator::self()->attachComponent(*it);

	m_toSimulateList.clear();

	// Stage 0: Build up pin and wire lists
	m_pinList.clear();

	const ECNodeMap::const_iterator nodeListEnd = m_ecNodeList.end();
	for ( ECNodeMap::const_iterator it = m_ecNodeList.begin(); it != nodeListEnd; ++it )
	{
		// if ( ECNode * ecnode = dynamic_cast<ECNode*>(*it) )
		ECNode* ecnode = *it;

		for ( unsigned i = 0; i < ecnode->numPins(); i++ )
			m_pinList << ecnode->pin(i);

	}
	
	m_wireList.clear();

	const ConnectorList::const_iterator connectorListEnd = m_connectorList.end();
	for ( ConnectorList::const_iterator it = m_connectorList.begin(); it != connectorListEnd; ++it )
	{
		for ( unsigned i = 0; i < (*it)->numWires(); i++ )
			m_wireList << (*it)->wire(i);
	}

	typedef QList<PinList> PinListList;
	
	// Stage 1: Partition the circuit up into dependent areas (bar splitting
	// at ground pins)
	PinList unassignedPins = m_pinList;
	PinListList pinListList;

	while( !unassignedPins.isEmpty() ) {
		PinList pinList;
		getPartition( *unassignedPins.begin(), & pinList, & unassignedPins );
		pinListList.append(pinList);
	}

// 	kDebug () << "pinListList.size()="<<pinListList.size()<<endl;
	
	// Stage 2: Split up each partition into circuits by ground pins
	const PinListList::iterator nllEnd = pinListList.end();
	for ( PinListList::iterator it = pinListList.begin(); it != nllEnd; ++it )
		splitIntoCircuits(&*it);
	
	// Stage 3: Initialize the circuits
	m_circuitList.remove(0l);
	CircuitList::iterator circuitListEnd = m_circuitList.end();
	for ( CircuitList::iterator it = m_circuitList.begin(); it != circuitListEnd; ++it )
		(*it)->init();
	
	m_switchList.clear();
	m_componentList.clear();
	const ItemMap::const_iterator cilEnd = m_itemList.end();
	for ( ItemMap::const_iterator it = m_itemList.begin(); it != cilEnd; ++it )
	{
		Component *component = dynamic_cast<Component*>(*it);

		if ( !component ) continue;

		m_componentList << component;
		component->initElements(0);
		m_switchList += component->switchList();
	}
	
	circuitListEnd = m_circuitList.end();
	for ( CircuitList::iterator it = m_circuitList.begin(); it != circuitListEnd; ++it )
		(*it)->createMatrixMap();
	
	for ( ItemMap::const_iterator it = m_itemList.begin(); it != cilEnd; ++it )
	{
		Component *component = dynamic_cast<Component*>(*it);

		if (component) component->initElements(1);
	}
	
	circuitListEnd = m_circuitList.end();
	for ( CircuitList::iterator it = m_circuitList.begin(); it != circuitListEnd; ++it )
	{
		(*it)->initCache();
		Simulator::self()->attachCircuit(*it);
	}
}


void CircuitDocument::getPartition( Pin *pin, PinList *pinList, PinList *unassignedPins, bool onlyGroundDependent )
{
	if (!pin) return;
	
	unassignedPins->remove(pin);
	
	if ( pinList->contains(pin) ) return;

	pinList->append(pin);

	const PinList localConnectedPins = pin->localConnectedPins();
	const PinList::const_iterator end = localConnectedPins.end();
	for ( PinList::const_iterator it = localConnectedPins.begin(); it != end; ++it )
		getPartition( *it, pinList, unassignedPins, onlyGroundDependent );
	
	const PinList groundDependentPins = pin->groundDependentPins();
	const PinList::const_iterator dEnd = groundDependentPins.end();
	for ( PinList::const_iterator it = groundDependentPins.begin(); it != dEnd; ++it )
		getPartition( *it, pinList, unassignedPins, onlyGroundDependent );
	
	if (!onlyGroundDependent) {
		PinList circuitDependentPins = pin->circuitDependentPins();
		const PinList::const_iterator dEnd = circuitDependentPins.end();
		for ( PinList::const_iterator it = circuitDependentPins.begin(); it != dEnd; ++it )
			getPartition( *it, pinList, unassignedPins, onlyGroundDependent );
	}
}


void CircuitDocument::splitIntoCircuits( PinList *pinList )
{
	// First: identify ground
	PinList unassignedPins = *pinList;
	typedef QList<PinList> PinListList;
	PinListList pinListList;

	while ( !unassignedPins.isEmpty() ) {
		PinList tempPinList;
		getPartition( *unassignedPins.begin(), & tempPinList, & unassignedPins, true );
		pinListList.append(tempPinList);
	}

	const PinListList::iterator nllEnd = pinListList.end();
	for ( PinListList::iterator it = pinListList.begin(); it != nllEnd; ++it )
		Circuit::identifyGround(*it);

	while ( !pinList->isEmpty() ) {
		PinList::iterator end = pinList->end();
		PinList::iterator it = pinList->begin();
		
		while ( it != end && (*it)->eqId() == -1 )
			++it;
		
		if ( it == end ) break;
		else {
			Circuitoid *circuitoid = new Circuitoid;
			recursivePinAdd( *it, circuitoid, pinList );
			
			if ( !tryAsLogicCircuit(circuitoid) )
				m_circuitList += createCircuit(circuitoid);
			
			delete circuitoid;
		}
	}
	
	
	// Remaining pins are ground; tell them about it
	// TODO This is a bit hacky....
	const PinList::iterator end = pinList->end();
	for ( PinList::iterator it = pinList->begin(); it != end; ++it ) {
		(*it)->setVoltage(0.0);
		ElementList elements = (*it)->elements();
		const ElementList::iterator eEnd = elements.end();
		for ( ElementList::iterator it = elements.begin(); it != eEnd; ++it )
		{
			if ( LogicIn * logicIn = dynamic_cast<LogicIn*>(*it) )
			{
				logicIn->setLastState(false);
				logicIn->callCallback();
			}
		}
	}
}


void CircuitDocument::recursivePinAdd( Pin *pin, Circuitoid *circuitoid, PinList *unassignedPins )
{
	if(!pin) return;
	
	if(pin->eqId() != -1 )
		unassignedPins->remove(pin);

	if(circuitoid->contains(pin) ) return;

	circuitoid->addPin(pin);

	if(pin->eqId() == -1 ) return;

	const PinList localConnectedPins = pin->localConnectedPins();
	const PinList::const_iterator end = localConnectedPins.end();
	for ( PinList::const_iterator it = localConnectedPins.begin(); it != end; ++it )
		recursivePinAdd( *it, circuitoid, unassignedPins );

	const PinList groundDependentPins = pin->groundDependentPins();
	const PinList::const_iterator gdEnd = groundDependentPins.end();
	for ( PinList::const_iterator it = groundDependentPins.begin(); it != gdEnd; ++it )
		recursivePinAdd( *it, circuitoid, unassignedPins );

	const PinList circuitDependentPins = pin->circuitDependentPins();
	const PinList::const_iterator cdEnd = circuitDependentPins.end();
	for ( PinList::const_iterator it = circuitDependentPins.begin(); it != cdEnd; ++it )
		recursivePinAdd( *it, circuitoid, unassignedPins );

	const ElementList elements = pin->elements();
	const ElementList::const_iterator eEnd = elements.end();
	for ( ElementList::const_iterator it = elements.begin(); it != eEnd; ++it )
		circuitoid->addElement(*it);
}


bool CircuitDocument::tryAsLogicCircuit( Circuitoid *circuitoid )
{
	if (!circuitoid) return false;
	
	if ( circuitoid->elementList.size() == 0 )
	{
		// This doesn't quite belong here...but whatever. Initialize all
		// pins to voltage zero as they won't get set to zero otherwise
		const PinList::const_iterator pinListEnd = circuitoid->pinList.constEnd();
		for ( PinList::const_iterator it = circuitoid->pinList.constBegin(); it != pinListEnd; ++it )
			(*it)->setVoltage(0.0);
		
		// A logic circuit only requires there to be no non-logic components,
		// and at most one LogicOut - so this qualifies
		return true;
	}
	
	LogicInList logicInList;
	LogicOut *out = 0;
	
	uint logicInCount = 0;
	uint logicOutCount = 0;
	ElementList::const_iterator end = circuitoid->elementList.end();
	for ( ElementList::const_iterator it = circuitoid->elementList.begin(); it != end; ++it )
	{
		if ( (*it)->type() == Element::Element_LogicOut )
		{
			logicOutCount++;
			out = static_cast<LogicOut*>(*it);
		} else if ( (*it)->type() == Element::Element_LogicIn )
		{
			logicInCount++;
			logicInList += static_cast<LogicIn*>(*it);
		} else return false;
	}

	if ( logicOutCount > 1 ) return false;
	else if ( logicOutCount == 1 )
		Simulator::self()->createLogicChain( out, logicInList, circuitoid->pinList );
	else {
		// We have ourselves stranded LogicIns...so lets set them all to low
		
		const PinList::const_iterator pinListEnd = circuitoid->pinList.constEnd();
		for ( PinList::const_iterator it = circuitoid->pinList.constBegin(); it != pinListEnd; ++it )
			(*it)->setVoltage(0.0);
		
		for ( ElementList::const_iterator it = circuitoid->elementList.begin(); it != end; ++it )
		{
			LogicIn * logicIn = static_cast<LogicIn*>(*it);
			logicIn->setNextLogic(0l);
			logicIn->setElementSet(0l);
			if ( logicIn->isHigh() )
			{
				logicIn->setLastState(false);
				logicIn->callCallback();
			}
		}
	}
	
	return true;
}


Circuit *CircuitDocument::createCircuit( Circuitoid *circuitoid )
{
	if (!circuitoid) return 0l;

	Circuit *circuit = new Circuit();
	
	const PinList::const_iterator nEnd = circuitoid->pinList.end();
	for ( PinList::const_iterator it = circuitoid->pinList.begin(); it != nEnd; ++it )
		circuit->addPin(*it);
	
	const ElementList::const_iterator eEnd = circuitoid->elementList.end();
	for ( ElementList::const_iterator it = circuitoid->elementList.begin(); it != eEnd; ++it )
		circuit->addElement(*it);
	
	return circuit;
}


void CircuitDocument::createSubcircuit()
{
	ItemList itemList = m_selectList->items();
	const ItemList::iterator itemListEnd = itemList.end();
	for ( ItemList::iterator it = itemList.begin(); it != itemListEnd; ++it )
	{
		if ( !dynamic_cast<Component*>((Item*)*it) )
			*it = 0;
	}

	itemList.remove((Item*)0);
	
	if ( itemList.isEmpty() ) {
		KMessageBox::sorry( activeView(), i18n("No components were found in the selection.") );
		return;
	}

	// Number of external connections
	const int extConCount = countExtCon(itemList);
	if ( extConCount == 0 ) {
		KMessageBox::sorry( activeView(), i18n("No External Connection components were found in the selection.") );
		return;
	}

	bool ok;
	const QString name = KInputDialog::getText( "Subcircuit", "Name", QString::null, &ok, activeView() );
	if (!ok) return;

	SubcircuitData subcircuit;
	subcircuit.addItems(itemList);
	subcircuit.addNodes( getCommonNodes(itemList) );
	subcircuit.addConnectors( getCommonConnectors(itemList) );

	Subcircuits::addSubcircuit( name, subcircuit.toXML() );
}


int CircuitDocument::countExtCon( const ItemList &itemList ) const
{
	int count = 0;
	const ItemList::const_iterator end = itemList.end();
	for ( ItemList::const_iterator it = itemList.begin(); it != end; ++it )
	{
		Item * item = *it;

		if ( item && item->type() == "ec/external_connection" )
			count++;
	}
	return count;
}


bool CircuitDocument::isValidItem( const QString &itemId )
{
	return itemId.startsWith("ec/") || itemId.startsWith("dp/") || itemId.startsWith("sc/");
}


bool CircuitDocument::isValidItem( Item *item )
{
	return (dynamic_cast<Component*>(item) || dynamic_cast<DrawPart*>(item));
}


void CircuitDocument::displayEquations()
{
	kDebug() << "######################################################" << endl;
	const CircuitList::iterator end = m_circuitList.end();
	int i = 1;
	for ( CircuitList::iterator it = m_circuitList.begin(); it != end; ++it )
	{
		kDebug() << "Equation set "<<i<<":\n";
		(*it)->displayEquations();
		i++;
	}
	kDebug() << "######################################################" << endl;
}


#include "circuitdocument.moc"
