/***************************************************************************
 *   Copyright (C) 2005 by Fredy Yanardi                                   *
 *                                                                         *
 *   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 "libraryitem.h"
#include "logic.h"
#include "magnitudecomparator.h"
#include "variant.h"

#include <cmath>
#include <klocale.h>

Item* MagnitudeComparator::construct( ItemDocument *itemDocument, bool newItem, const char *id )
{
	return new MagnitudeComparator( (ICNDocument*)itemDocument, newItem, id );
}

LibraryItem* MagnitudeComparator::libraryItem()
{
	return new LibraryItem(
			QString("ec/magnitudecomparator"),
	i18n("Magnitude Comparator"),
	i18n("Integrated Circuits"),
	"ic1.png",
	LibraryItem::lit_component,
	MagnitudeComparator::construct
						  );
}

MagnitudeComparator::MagnitudeComparator( ICNDocument *icnDocument, bool newItem, const char *id )
	: Component( icnDocument, newItem, id ? id : "magnitudecomparator" )
{
	m_name = i18n("Magnitude Comparator");
// 	m_desc = i18n("Compares to two binary number and generates input to indicate which binary number has greater magnitude. It has 3 cascading inputs: I0 for I<SUB>A &gt; B</SUB>, I1 for I<SUB>A &lt; B</SUB>, and I2 for I<SUB>A = B</SUB> and 3 outputs: O0 for O<SUB>A &gt; B</SUB>, O1 for O<SUB>A &lt; B</SUB>, and O2 for O<SUB>A = B</SUB>");
	m_desc = i18n("Compares two binary numbers and generates output to indicate which binary number has the greater magnitude. It has 3 cascading inputs:"
			"<ul><li>I: A &gt; B</li>"
			"<li>I: A &lt; B</li>"
			"<li>I: A = B</li></ul>"
			"and 3 outputs:"
			"<ul><li>O: A &gt; B</li>"
			"<li>O: A &lt; B</li>"
			"<li>O: A = B</li></ul>");
	
	createProperty( "numInput", Variant::Type::Int );
	property("numInput")->setCaption( i18n("Number Inputs") );
	property("numInput")->setMinValue(1);
	property("numInput")->setMaxValue(8);
	property("numInput")->setValue(4);
	
	m_oldABLogicCount = 0;
	cascadingInputs = 3;
	outputs = 3;
	
	firstTime = true;
}

MagnitudeComparator::~MagnitudeComparator()
{
}


void MagnitudeComparator::dataChanged()
{
	initPins();
}


void MagnitudeComparator::inStateChanged()
{
	int i;
	
	for ( i = 0; i < 3; i++ )
		m_output[i]->setHigh(false);
	
// 	for ( i = dataInt("numInput")-1; i >= 0; i-- ) {
	for ( i = m_oldABLogicCount-1; i >= 0; i-- ) {
		if (m_aLogic[i]->isHigh() && !m_bLogic[i]->isHigh())
		{
			m_output[0]->setHigh(true);
			return;
		}
		else if ( !m_aLogic[i]->isHigh() && m_bLogic[i]->isHigh() ) {
			m_output[1]->setHigh(true);
			return;
		}
	}
	
	if ( m_cLogic[2]->isHigh() )
		m_output[2]->setHigh(true);
	else if ( m_cLogic[0]->isHigh() )
		if ( !m_cLogic[1]->isHigh() )
			m_output[0]->setHigh(true);
	else
		;
	else if ( m_cLogic[1]->isHigh() )
		m_output[1]->setHigh(true);
	else {
		m_output[0]->setHigh(true);
		m_output[1]->setHigh(true);
	}
}


void MagnitudeComparator::initPins()
{
	const double numInputs = dataInt("numInput");
	int newABLogicCount = (int)numInputs;
	
	if ( newABLogicCount == m_oldABLogicCount )
		return;
	
	QStringList leftPins;
	int space = 3 - newABLogicCount;
	for ( int i = 0; i < space; i++ )
		leftPins << "";
	for ( int i = 0; i < newABLogicCount; i++ )
		leftPins << QString("A%1").arg( QString::number(i) );
	for ( int i = 0; i < newABLogicCount; i++ )
		leftPins << QString("B%1").arg( QString::number(i) );
	for ( int i = 0; i < space; i++ )
		leftPins << "";
	
	QStringList rightPins;
	space = -space;
	for ( int i = 0; i < space; i++ )
		rightPins << "";
	QString inNames[] = { "I: A>B", "I: A<B", "I: A=B" };
	rightPins << inNames[2] << inNames[1] << inNames[0];
	QString outNames[] = { "O: A>B", "O: A<B", "O: A=B" };
	rightPins << outNames[2] << outNames[1] << outNames[0];
	for ( int i = 0; i < space; i++ )
		rightPins << "";
			
	QStringList pins = leftPins + rightPins;
	
	initDIPSymbol( pins, 88 );
	initDIP(pins);
	
	ECNode *node;
	
	if (firstTime) {
		m_cLogic.resize(3);
		for ( int i = 0; i < cascadingInputs; i++ )
		{
			node = ecNodeWithID( inNames[i] );
			m_cLogic.insert( i, createLogicIn(node) );
			m_cLogic[i]->setCallback( this, (CallbackPtr)(&MagnitudeComparator::inStateChanged));
		}
		
		m_output.resize(3);
		for ( int i = 0; i < outputs; i++ )
		{
			node = ecNodeWithID( outNames[i] );
			m_output.insert( i, createLogicOut(node,false) );
		}
		firstTime = false;
	}
		
	if ( newABLogicCount > m_oldABLogicCount )
	{
		m_aLogic.resize(newABLogicCount);
		for ( int i=m_oldABLogicCount; i<newABLogicCount; ++i )
		{
			node = ecNodeWithID("A"+QString::number(i));
			m_aLogic.insert( i, createLogicIn(node) );
			m_aLogic[i]->setCallback( this, (CallbackPtr)(&MagnitudeComparator::inStateChanged) );
		}
		
		m_bLogic.resize(newABLogicCount);
		for ( int i=m_oldABLogicCount; i<newABLogicCount; ++i )
		{
			node = ecNodeWithID("B"+QString::number(i));
			m_bLogic.insert( i, createLogicIn(node) );
			m_bLogic[i]->setCallback( this, (CallbackPtr)(&MagnitudeComparator::inStateChanged) );
		}
	}
	else
	{
		for ( int i=newABLogicCount; i<m_oldABLogicCount; ++i )
		{
			QString id = "A"+QString::number(i);
			removeDisplayText(id);
			removeElement( m_aLogic[i], false );
			removeNode(id);
		}
		m_aLogic.resize(newABLogicCount);
		for ( int i=newABLogicCount; i<m_oldABLogicCount; ++i )
		{
			QString id = "B"+QString::number(i);
			removeDisplayText(id);
			removeElement( m_bLogic[i], false );
			removeNode(id);
		}
		m_bLogic.resize(newABLogicCount);
	}

	m_oldABLogicCount = newABLogicCount;
	inStateChanged();
}