/***************************************************************************
                          addconstraintactivitiessamestartingtimeform.cpp  -  description
                             -------------------
    begin                : Wed June 23 2004
    copyright            : (C) 2004 by Lalescu Liviu
    email                : Please see http://lalescu.ro/liviu/ for details about contacting Liviu Lalescu (in particular, you can find here the e-mail address)
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 <QMessageBox>

#include "longtextmessagebox.h"

#include "addconstraintactivitiessamestartingtimeform.h"

#include "matrix.h"

#include <QListWidget>
#include <QAbstractItemView>
#include <QScrollBar>

AddConstraintActivitiesSameStartingTimeForm::AddConstraintActivitiesSameStartingTimeForm(QWidget* parent): QDialog(parent)
{
	setupUi(this);

	addConstraintPushButton->setDefault(true);
	
	activitiesListWidget->setSelectionMode(QAbstractItemView::SingleSelection);
	simultaneousActivitiesListWidget->setSelectionMode(QAbstractItemView::SingleSelection);

	connect(closePushButton, SIGNAL(clicked()), this, SLOT(close()));
	connect(addConstraintPushButton, SIGNAL(clicked()), this, SLOT(addConstraint()));
	connect(helpPushButton, SIGNAL(clicked()), this, SLOT(help()));
	connect(blockCheckBox, SIGNAL(toggled(bool)), this, SLOT(blockChanged()));
	connect(teachersComboBox, SIGNAL(activated(QString)), this, SLOT(filterChanged()));
	connect(studentsComboBox, SIGNAL(activated(QString)), this, SLOT(filterChanged()));
	connect(subjectsComboBox, SIGNAL(activated(QString)), this, SLOT(filterChanged()));
	connect(activityTagsComboBox, SIGNAL(activated(QString)), this, SLOT(filterChanged()));
	connect(clearPushButton, SIGNAL(clicked()), this, SLOT(clear()));
	connect(activitiesListWidget, SIGNAL(itemDoubleClicked(QListWidgetItem*)), this, SLOT(addActivity()));
	connect(addAllActivitiesPushButton, SIGNAL(clicked()), this, SLOT(addAllActivities()));
	connect(simultaneousActivitiesListWidget, SIGNAL(itemDoubleClicked(QListWidgetItem*)), this, SLOT(removeActivity()));

	centerWidgetOnScreen(this);
	restoreFETDialogGeometry(this);
	
	QSize tmp1=teachersComboBox->minimumSizeHint();
	Q_UNUSED(tmp1);
	QSize tmp2=studentsComboBox->minimumSizeHint();
	Q_UNUSED(tmp2);
	QSize tmp3=subjectsComboBox->minimumSizeHint();
	Q_UNUSED(tmp3);
	QSize tmp4=activityTagsComboBox->minimumSizeHint();
	Q_UNUSED(tmp4);
	
	teachersComboBox->addItem("");
	for(int i=0; i<gt.rules.teachersList.size(); i++){
		Teacher* tch=gt.rules.teachersList[i];
		teachersComboBox->addItem(tch->name);
	}
	teachersComboBox->setCurrentIndex(0);

	subjectsComboBox->addItem("");
	for(int i=0; i<gt.rules.subjectsList.size(); i++){
		Subject* sb=gt.rules.subjectsList[i];
		subjectsComboBox->addItem(sb->name);
	}
	subjectsComboBox->setCurrentIndex(0);

	activityTagsComboBox->addItem("");
	for(int i=0; i<gt.rules.activityTagsList.size(); i++){
		ActivityTag* st=gt.rules.activityTagsList[i];
		activityTagsComboBox->addItem(st->name);
	}
	activityTagsComboBox->setCurrentIndex(0);

	studentsComboBox->addItem("");
	for(int i=0; i<gt.rules.yearsList.size(); i++){
		StudentsYear* sty=gt.rules.yearsList[i];
		studentsComboBox->addItem(sty->name);
		for(int j=0; j<sty->groupsList.size(); j++){
			StudentsGroup* stg=sty->groupsList[j];
			studentsComboBox->addItem(stg->name);
			for(int k=0; k<stg->subgroupsList.size(); k++){
				StudentsSubgroup* sts=stg->subgroupsList[k];
				studentsComboBox->addItem(sts->name);
			}
		}
	}
	studentsComboBox->setCurrentIndex(0);
	
	simultaneousActivitiesListWidget->clear();
	this->simultaneousActivitiesList.clear();

	updateActivitiesListWidget();
}

AddConstraintActivitiesSameStartingTimeForm::~AddConstraintActivitiesSameStartingTimeForm()
{
	saveFETDialogGeometry(this);
}

bool AddConstraintActivitiesSameStartingTimeForm::filterOk(Activity* act)
{
	QString tn=teachersComboBox->currentText();
	QString stn=studentsComboBox->currentText();
	QString sbn=subjectsComboBox->currentText();
	QString sbtn=activityTagsComboBox->currentText();
	int ok=true;

	//teacher
	if(tn!=""){
		bool ok2=false;
		for(QStringList::Iterator it=act->teachersNames.begin(); it!=act->teachersNames.end(); it++)
			if(*it == tn){
				ok2=true;
				break;
			}
		if(!ok2)
			ok=false;
	}

	//subject
	if(sbn!="" && sbn!=act->subjectName)
		ok=false;
		
	//activity tag
	if(sbtn!="" && !act->activityTagsNames.contains(sbtn))
		ok=false;
		
	//students
	if(stn!=""){
		bool ok2=false;
		for(QStringList::Iterator it=act->studentsNames.begin(); it!=act->studentsNames.end(); it++)
			if(*it == stn){
				ok2=true;
				break;
			}
		if(!ok2)
			ok=false;
	}
	
	return ok;
}

void AddConstraintActivitiesSameStartingTimeForm::filterChanged()
{
	this->updateActivitiesListWidget();
}

void AddConstraintActivitiesSameStartingTimeForm::updateActivitiesListWidget()
{
	activitiesListWidget->clear();
	this->activitiesList.clear();

	if(blockCheckBox->isChecked())
		//show only non-split activities and split activities which are the representatives
		for(int i=0; i<gt.rules.activitiesList.size(); i++){
			Activity* ac=gt.rules.activitiesList[i];
			if(filterOk(ac)){
				if(ac->activityGroupId==0){
					activitiesListWidget->addItem(ac->getDescription(gt.rules));
					this->activitiesList.append(ac->id);
				}
				else if(ac->id==ac->activityGroupId){
					activitiesListWidget->addItem(ac->getDescription(gt.rules));
					this->activitiesList.append(ac->id);
				}
			}
		}
	else
		for(int i=0; i<gt.rules.activitiesList.size(); i++){
			Activity* ac=gt.rules.activitiesList[i];
			if(filterOk(ac)){
				activitiesListWidget->addItem(ac->getDescription(gt.rules));
				this->activitiesList.append(ac->id);
			}
		}
	
	int q=activitiesListWidget->verticalScrollBar()->minimum();
	activitiesListWidget->verticalScrollBar()->setValue(q);
}

void AddConstraintActivitiesSameStartingTimeForm::blockChanged()
{
	simultaneousActivitiesListWidget->clear();
	this->simultaneousActivitiesList.clear();

	updateActivitiesListWidget();
}

void AddConstraintActivitiesSameStartingTimeForm::addConstraint()
{
	TimeConstraint *ctr=NULL;

	double weight;
	QString tmp=weightLineEdit->text();
	weight_sscanf(tmp, "%lf", &weight);
	if(weight<0.0 || weight>100.0){
		QMessageBox::warning(this, tr("FET information"),
			tr("Invalid weight (percentage)"));
		return;
	}

	if(this->simultaneousActivitiesList.count()==0){
		QMessageBox::warning(this, tr("FET information"),
			tr("Empty list of simultaneous activities"));
		return;
	}
	if(this->simultaneousActivitiesList.count()==1){
		QMessageBox::warning(this, tr("FET information"),
			tr("Only one selected activity - impossible"));
		return;
	}
	
	if(blockCheckBox->isChecked()){ //block constraints
		///////////phase 1 - how many constraints will be added?
		int nConstraints=0;
		QList<int>::iterator it;
		for(it=this->simultaneousActivitiesList.begin(); it!=this->simultaneousActivitiesList.end(); it++){
			int _id=(*it);
			int tmp=0; //tmp represents the number of sub-activities represented by the current (sub)activity

			for(int i=0; i<gt.rules.activitiesList.size(); i++){
				Activity* act=gt.rules.activitiesList[i];
				if(act->activityGroupId==0){
					if(act->id==_id){
						assert(tmp==0);
						tmp=1;
					}
				}
				else{
					if(act->id==_id){
						assert(act->activityGroupId==act->id);
						assert(tmp==0);
						tmp=1;
					}
					else if(act->activityGroupId==_id)
						tmp++;
				}
			}

			if(nConstraints==0){
				nConstraints=tmp;
			}
			else{
				if(tmp!=nConstraints){
					QString s=tr("Sub-activities do not correspond. Mistake:");
					s+="\n";
					s+=tr("1. First (sub)activity has id=%1 and represents %2 sub-activities")
						.arg(this->simultaneousActivitiesList.at(0))
						.arg(nConstraints);
					s+="\n";
					s+=tr("2. Current (sub)activity has id=%1 and represents %2 sub-activities")
						.arg(_id)
						.arg(tmp);
					QMessageBox::warning(this, tr("FET information"), s);
					return;				
				}
			}
		}
	
		/////////////phase 2 - compute the indices of all the (sub)activities
		Matrix1D<QList<int> > ids;
		ids.resize(nConstraints);

		for(int i=0; i<nConstraints; i++)
			ids[i].clear();
		int k;
		for(k=0, it=this->simultaneousActivitiesList.begin(); it!=this->simultaneousActivitiesList.end(); k++, it++){
			int _id=(*it);
			int tmp=0; //tmp represents the number of sub-activities represented by the current (sub)activity

			for(int i=0; i<gt.rules.activitiesList.size(); i++){
				Activity* act=gt.rules.activitiesList[i];
				if(act->activityGroupId==0){
					if(act->id==_id){
						assert(tmp==0);
						assert(ids[tmp].count()==k);
						ids[tmp].append(_id);
						tmp=1;
					}
				}
				else{
					if(act->id==_id){
						assert(act->activityGroupId==act->id);
						assert(tmp==0);
						assert(ids[tmp].count()==k);
						ids[tmp].append(_id);
						tmp=1;
					}
					else if(act->activityGroupId==_id){
						assert(ids[tmp].count()==k);
						ids[tmp].append(act->id);
						tmp++;
					}
				}
			}
		}
	
		////////////////phase 3 - add the constraints
		for(k=0; k<nConstraints; k++){
			ctr=new ConstraintActivitiesSameStartingTime(weight, this->simultaneousActivitiesList.count(), ids[k]);
			bool tmp2=gt.rules.addTimeConstraint(ctr);
			
			if(tmp2){
				QString s;

				s+=tr("Constraint added:");
				s+="\n\n";
				s+=ctr->getDetailedDescription(gt.rules);
				LongTextMessageBox::information(this, tr("FET information"), s);
			}
			else{
				QMessageBox::warning(this, tr("FET information"),
					tr("Constraint NOT added - please report error"));
				delete ctr;
			}
		}
	}
	else{
		QList<int> ids;
		QList<int>::iterator it;
		int i;
		ids.clear();
		for(i=0, it=this->simultaneousActivitiesList.begin(); it!=this->simultaneousActivitiesList.end(); i++,it++){
			ids.append(*it);
		}
		ctr=new ConstraintActivitiesSameStartingTime(weight, this->simultaneousActivitiesList.count(), ids);

		bool tmp2=gt.rules.addTimeConstraint(ctr);
		
		if(tmp2){
			QString s;

			s+=tr("Constraint added:");
			s+="\n\n";
			s+=ctr->getDetailedDescription(gt.rules);
			LongTextMessageBox::information(this, tr("FET information"), s);
		}
		else{
			QMessageBox::warning(this, tr("FET information"),
				tr("Constraint NOT added - please report error"));
			delete ctr;
		}
	}
}

void AddConstraintActivitiesSameStartingTimeForm::addActivity()
{
	if(activitiesListWidget->currentRow()<0)
		return;
	int tmp=activitiesListWidget->currentRow();
	int _id=this->activitiesList.at(tmp);
	
	QString actName=activitiesListWidget->currentItem()->text();
	assert(actName!="");
	int i;
	//duplicate?
	for(i=0; i<simultaneousActivitiesListWidget->count(); i++)
		if(actName==simultaneousActivitiesListWidget->item(i)->text())
			break;
	if(i<simultaneousActivitiesListWidget->count())
		return;
	
	simultaneousActivitiesListWidget->addItem(actName);
	simultaneousActivitiesListWidget->setCurrentRow(simultaneousActivitiesListWidget->count()-1);
	
	this->simultaneousActivitiesList.append(_id);
}

void AddConstraintActivitiesSameStartingTimeForm::addAllActivities()
{
	for(int tmp=0; tmp<activitiesListWidget->count(); tmp++){
		int _id=this->activitiesList.at(tmp);
	
		QString actName=activitiesListWidget->item(tmp)->text();
		assert(actName!="");
		int i;
		//duplicate?
		for(i=0; i<simultaneousActivitiesList.count(); i++)
			if(simultaneousActivitiesList.at(i)==_id)
				break;
		if(i<simultaneousActivitiesList.count())
			continue;
			
		simultaneousActivitiesListWidget->addItem(actName);
		this->simultaneousActivitiesList.append(_id);
	}
	
	simultaneousActivitiesListWidget->setCurrentRow(simultaneousActivitiesListWidget->count()-1);
}

void AddConstraintActivitiesSameStartingTimeForm::removeActivity()
{
	if(simultaneousActivitiesListWidget->currentRow()<0 || simultaneousActivitiesListWidget->count()<=0)
		return;
	int tmp=simultaneousActivitiesListWidget->currentRow();
	
	this->simultaneousActivitiesList.removeAt(tmp);
	
	simultaneousActivitiesListWidget->setCurrentRow(-1);
	QListWidgetItem* item=simultaneousActivitiesListWidget->takeItem(tmp);
	delete item;
	if(tmp<simultaneousActivitiesListWidget->count())
		simultaneousActivitiesListWidget->setCurrentRow(tmp);
	else
		simultaneousActivitiesListWidget->setCurrentRow(simultaneousActivitiesListWidget->count()-1);
}

void AddConstraintActivitiesSameStartingTimeForm::clear()
{
	simultaneousActivitiesListWidget->clear();
	simultaneousActivitiesList.clear();
}

void AddConstraintActivitiesSameStartingTimeForm::help()
{
	QString s;
	
	s=tr("Add multiple constraints: this is a check box. Select this if you want to input only the representatives of sub-activities and FET to add multiple constraints,"
	" for all sub-activities from the same components, in turn, respectively."
	" There will be added more constraints activities same starting time, one for each corresponding tuple. The number of"
	" sub-activities must match for the representants and be careful to the order, to be what you need");

	LongTextMessageBox::largeInformation(this, tr("FET help"), s);
}
