/*
	Copyright 2006-2021 The QElectroTech Team
	This file is part of QElectroTech.

	QElectroTech 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.

	QElectroTech 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 QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "elementpropertieswidget.h"

#include "../diagram.h"
#include "../diagramposition.h"
#include "../qetapp.h"
#include "../qetgraphicsitem/dynamicelementtextitem.h"
#include "../qetgraphicsitem/element.h"
#include "../qetgraphicsitem/elementtextitemgroup.h"
#include "../qeticons.h"
#include "dynamicelementtextitemeditor.h"
#include "elementinfowidget.h"
#include "linksingleelementwidget.h"
#include "masterpropertieswidget.h"

#include <QLabel>
#include <QUndoStack>
#include <QVBoxLayout>

/**
	@brief ElementPropertiesWidget::ElementPropertiesWidget
	Default constructor
	@param elmt
	@param parent
*/
ElementPropertiesWidget::ElementPropertiesWidget(Element *elmt,
						 QWidget *parent) :
	AbstractElementPropertiesEditorWidget (parent),
	m_diagram (elmt->diagram()),
	m_tab (nullptr),
	m_general_widget(nullptr)
{
	buildGui();
	setElement(elmt);
}

/**
	@brief ElementPropertiesWidget::ElementPropertiesWidget
	Same as default constructor, the edited element,
	is the parent element of text.
	The only difference with default constructor,
	is that the current tab is the tab for dynamic texts,
	and the item in the tree that represent text is expanded and selected.
	@param text
	@param parent
*/
ElementPropertiesWidget::ElementPropertiesWidget(DynamicElementTextItem *text,
						 QWidget *parent) :
	AbstractElementPropertiesEditorWidget (parent),
	m_tab (nullptr),
	m_general_widget(nullptr)
{
	if(text->parentElement())
	{
		m_diagram = text->parentElement()->diagram();
		buildGui();
		setDynamicText(text);
	}
}

/**
	@brief ElementPropertiesWidget::ElementPropertiesWidget
	Same as default constructor, the edited element,
	is the parent element of group.
	The only difference with default constructor,
	is that the current tab is the tab for dynamic texts,
	and the item in the tree that represent group is expanded and selected.
	@param group
	@param parent
*/
ElementPropertiesWidget::ElementPropertiesWidget(ElementTextItemGroup *group,
						 QWidget *parent) :
	AbstractElementPropertiesEditorWidget (parent),
	m_tab (nullptr),
	m_general_widget(nullptr)
{
	if(group->parentItem() && group->parentItem()->type() == Element::Type)
	{
		Element *elmt = static_cast<Element *>(group->parentItem());
		m_diagram = elmt->diagram();
		buildGui();
		setTextsGroup(group);
	}
}

/**
	@brief ElementPropertiesWidget::setElement
	Set element to be the edited element
	@param element
*/
void ElementPropertiesWidget::setElement(Element *element)
{
	if (m_element == element) return;
	Element *previous_element = m_element;
	m_element = element;

	if (previous_element)
	{
			//If previous element is same type as new element we just call setElement for each editor
		if(previous_element->linkType() == m_element->linkType())
		{
			foreach (AbstractElementPropertiesEditorWidget *aepew, m_list_editor)
			{
				aepew->setElement(m_element);
				addGeneralWidget();
			}
			return;
		}
	}
	updateUi();
}

/**
	@brief ElementPropertiesWidget::setDynamicText
	convenience function:
	same as call : ElementPropertiesWidget::setElement,
	with parameter the parent element of text.
	Set the dynamics text tab as current tab,
	expand and select the item that represent text
	@param text
*/
void ElementPropertiesWidget::setDynamicText(DynamicElementTextItem *text)
{
	if(text->parentElement())
	{
		setElement(text->parentElement());
		for(AbstractElementPropertiesEditorWidget *aepew : m_list_editor)
		{
			if (QString(aepew->metaObject()->className()) == "DynamicElementTextItemEditor")
			{
				DynamicElementTextItemEditor *detie = static_cast<DynamicElementTextItemEditor *>(aepew);
				m_tab->setCurrentWidget(detie);
				detie->setCurrentText(text);
			}
		}
	}
}

/**
	@brief ElementPropertiesWidget::setTextsGroup
	Conveniance function :
	same as call : ElementPropertiesWidget::setElement,
	with parameter the parent element of group.
	Set the dynamics text tab as current tab,
	expand and select the item that represent group
	@param group
*/
void ElementPropertiesWidget::setTextsGroup(ElementTextItemGroup *group)
{
	if(group->parentItem() && group->parentItem()->type() == Element::Type)
	{
		setElement(static_cast<Element *>(group->parentItem()));
		for(AbstractElementPropertiesEditorWidget *aepew : m_list_editor)
		{
			if (QString(aepew->metaObject()->className()) == "DynamicElementTextItemEditor")
			{
				DynamicElementTextItemEditor *detie = static_cast<DynamicElementTextItemEditor *>(aepew);
				m_tab->setCurrentWidget(detie);
				detie->setCurrentGroup(group);
			}
		}
	}
}

/**
	@brief ElementPropertiesWidget::apply
	Apply the new properties by pushing an undo command
	to the parent project's undo stack of element
*/
void ElementPropertiesWidget::apply()
{
	QList <QUndoCommand *> undo_list;

	foreach (PropertiesEditorWidget *pew, m_list_editor)
		if (QUndoCommand *undo = pew->associatedUndo())
			undo_list << undo;

	if (undo_list.isEmpty()) return;

	QString str;
	foreach(QUndoCommand *uc, undo_list) str += uc->text() += " ";

	QUndoStack &stack = m_element -> diagram() -> undoStack();
	stack.beginMacro(str);
	foreach(QUndoCommand *uc, undo_list) stack.push(uc);
	stack.endMacro();

	foreach(PropertiesEditorWidget *pew, m_list_editor)
		pew->updateUi();
}

/**
	@brief ElementPropertiesWidget::reset
	Reset the edited properties
*/
void ElementPropertiesWidget::reset()
{
	foreach (PropertiesEditorWidget *pew, m_list_editor) pew->reset();
}

bool ElementPropertiesWidget::setLiveEdit(bool live_edit)
{
	if (m_live_edit == live_edit) return true;
	m_live_edit = live_edit;

	foreach (AbstractElementPropertiesEditorWidget *aepew, m_list_editor)
		aepew->setLiveEdit(m_live_edit);

	return true;
}

/**
	@brief ElementPropertiesWidget::findInPanel
	If m_element is a custom element, emit findElementRequired
*/
void ElementPropertiesWidget::findInPanel()
{
	if (m_element && m_diagram)
	{
		m_diagram->findElementRequired(m_element.data()->location());
		emit findEditClicked();
	}
}

/**
	@brief ElementPropertiesWidget::editElement
	If m_element is a custom element, emit findElementRequired and editElementRequired
*/
void ElementPropertiesWidget::editElement()
{
	if (m_element && m_diagram)
	{
		m_diagram->findElementRequired(m_element.data()->location());
		QETApp::instance()->openElementLocations(QList<ElementsLocation>() << m_element.data()->location());
		emit findEditClicked();
	}
}

/**
	@brief ElementPropertiesWidget::build
	Build the content of this widget
*/
void ElementPropertiesWidget::buildGui()
{
	m_tab = new QTabWidget(this);
	QVBoxLayout *main_layout = new QVBoxLayout(this);
	main_layout -> addWidget(m_tab);
	setLayout(main_layout);
}

/**
	@brief ElementPropertiesWidget::updateUi
	Update the content of this widget
*/
void ElementPropertiesWidget::updateUi()
{
		//We keep the current title of the tab, to return to the same tab
		//if possible, at the end of this method
	QString tab_text;
	tab_text = m_tab->tabText(m_tab->currentIndex());

		//Purge the tab widget and delete all widget
	m_tab->clear();
	qDeleteAll(m_list_editor);
	m_list_editor.clear();
	if(m_general_widget) {
		delete m_general_widget;
		m_general_widget = nullptr;
	}

		//Create editor according to the type of element
	switch (m_element -> linkType())	{
		case Element::Simple:
			m_list_editor << new ElementInfoWidget(m_element, this);
			break;
		case Element::Thumbnail:
			m_list_editor << new ElementInfoWidget(m_element, this);
			break;
		case Element::NextReport:
			m_list_editor << new LinkSingleElementWidget(m_element, this);
			break;
		case Element::PreviousReport:
			m_list_editor << new LinkSingleElementWidget(m_element, this);
			break;
		case Element::Master:
			m_list_editor << new MasterPropertiesWidget(m_element, this);
			m_list_editor << new ElementInfoWidget(m_element, this);
			break;
		case Element::Slave:
			m_list_editor << new LinkSingleElementWidget(m_element, this);
			break;
		case Element::Terminale:
			m_list_editor << new ElementInfoWidget(m_element, this);
			break;
		default:
			break;
	}
	m_list_editor << new DynamicElementTextItemEditor(m_element, this);

		//Add each editors in tab widget
	for (AbstractElementPropertiesEditorWidget *aepew : m_list_editor)
	{
		aepew->setLiveEdit(m_live_edit);
		m_tab->addTab(aepew, aepew->title());
	}
	addGeneralWidget();

		//Go to the tab, edited at the beginning of this method
	if (!tab_text.isEmpty())
	{
		for(int i=0 ; i<m_tab->count() ; ++i)
		{
			if (tab_text == m_tab->tabBar()->tabText(i))
			{
				m_tab->setCurrentIndex(i);
				break;
			}
		}
	}
}

/**
	@brief ElementPropertiesWidget::addGeneralWidget
	Add or update the general widget on this tab widget
*/
void ElementPropertiesWidget::addGeneralWidget()
{
	int index = m_tab->currentIndex();
	if (m_general_widget)
	{
		m_tab->removeTab(m_tab->indexOf(m_general_widget));
		delete m_general_widget;
	}
	m_general_widget = generalWidget();
	m_tab -> addTab(m_general_widget, tr("Général"));
	m_tab->setCurrentIndex(index);
}

/**
	@brief ElementPropertiesWidget::generalWidget
	@return build and return the "general" widget
*/
QWidget *ElementPropertiesWidget::generalWidget()
{
	QString description_string(tr("Élement\n"));

		// some element characteristic
	description_string += QString(tr("Nom : %1\n")).arg(m_element -> name());
	int folio_index = m_diagram -> folioIndex();
	if (folio_index != -1) {
		description_string += QString(tr("Folio : %1\n")).arg(folio_index + 1);
	}
	description_string += QString(tr("Type : %1\n")).arg(m_element->elementData().typeToString());
	description_string += QString(tr("Sous-type : %1\n")).arg(m_element ->kindInformations()["type"].toString());
	description_string += QString(tr("Position : %1\n")).arg(m_diagram -> convertPosition(m_element -> scenePos()).toString());
	description_string += QString(tr("Rotation : %1°\n")).arg(m_element.data()->rotation());
	description_string += QString(tr("Dimensions : %1*%2\n")).arg(m_element -> size().width()).arg(m_element -> size().height());
	description_string += QString(tr("Bornes : %1\n")).arg(m_element -> terminals().count());
	description_string += QString(tr("Emplacement : %1\n")).arg(m_element.data()->location().toString());

		// widget himself
	QWidget *general_widget = new QWidget (m_tab);
	QVBoxLayout *vlayout_ = new QVBoxLayout (general_widget);
	general_widget -> setLayout(vlayout_);

		//widget for the text
	QLabel *label = new QLabel (description_string, general_widget);
	label->setWordWrap(true);
	label->setTextInteractionFlags(Qt::TextEditorInteraction);
	vlayout_->addWidget(label);

		//widget for the pixmap
	QLabel *pix = new QLabel(general_widget);
	vlayout_->addWidget(pix, 0, Qt::AlignHCenter);
	vlayout_ -> addStretch();

		//button widget
	QPushButton *find_in_panel = new QPushButton(QET::Icons::ZoomDraw, tr("Retrouver dans le panel"), general_widget);
	connect(find_in_panel, SIGNAL(clicked()), this, SLOT(findInPanel()));
	QPushButton *edit_element = new QPushButton(QET::Icons::ElementEdit, tr("Éditer l'élément"), general_widget);
	connect(edit_element, SIGNAL(clicked()), this, SLOT(editElement()));
	QHBoxLayout *hlayout_ = new QHBoxLayout;
	hlayout_->addWidget(find_in_panel);
	hlayout_->addWidget(edit_element);
	vlayout_->addLayout(hlayout_);

		//Set the maximum size of the pixmap to the minimum size of the layout
	QPixmap pixmap = m_element->pixmap();
	int margin = vlayout_->contentsMargins().left() + vlayout_->contentsMargins().right();
	int widht_ = vlayout_->minimumSize().width()-margin;

	if (pixmap.size().width() > widht_ || pixmap.size().height() > widht_) {
		pix->setPixmap(m_element->pixmap().scaled (widht_, widht_, Qt::KeepAspectRatio, Qt::SmoothTransformation));
	}
	else {
		pix->setPixmap(pixmap);
	}

	return general_widget;
}