/***************************************************************************
 *   Copyright (C) 2004-2005 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 "documentiface.h"
#include "drawpart.h"
#include "itemlibrary.h"
#include "mechanicsdocument.h"
#include "mechanicsitem.h"
#include "mechanicsgroup.h"
#include "mechanicssimulation.h"
#include "mechanicsview.h"

#include <KLocalizedString>

MechanicsDocument::MechanicsDocument( const QString &caption, const char *name )
	: ItemDocument( caption, name )
{
	m_type = Document::dt_mechanics;
	m_pDocumentIface = new MechanicsDocumentIface(this);
	m_fileExtensionInfo = QString("*.mechanics|%1 (*.mechanics)\n*|%2").arg( i18n("Mechanics") ).arg( i18n("All Files") );
	m_canvas->retune(128);
	
	m_selectList = new MechanicsGroup(this);
	
	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( CMMechItemMove::manipulatorInfo() );
	m_mechanicsSimulation = new MechanicsSimulation(this);
	requestStateSave();
}


MechanicsDocument::~MechanicsDocument()
{
	m_bDeleted = true;
	
	// Remove all items from the canvas
	selectAll();
	deleteSelection();
	delete m_mechanicsSimulation;
}

View *MechanicsDocument::createView( ViewContainer *viewContainer, uint viewAreaId, const char *name )
{
	ItemView *itemView = new MechanicsView( this, viewContainer, viewAreaId, name );
	handleNewView(itemView);
	return itemView;
}


ItemGroup *MechanicsDocument::selectList() const
{
	return m_selectList;
}




bool MechanicsDocument::isValidItem( const QString &itemId )
{
	return itemId.startsWith("mech/") || itemId.startsWith("dp/");
}


bool MechanicsDocument::isValidItem( Item *item )
{
	return item && ((dynamic_cast<MechanicsItem*>(item)) || (dynamic_cast<DrawPart*>(item)));
}


Item* MechanicsDocument::addItem( const QString &id, const QPoint &p, bool newItem )
{
	if ( !isValidItem(id) )
		return nullptr;
	
	Item *item = itemLibrary()->createItem( id, this, newItem );
	if (!item)
		return nullptr;
	
	QRect rect = item->boundingRect();
	
	int dx = (int)(p.x())-rect.width()/2;
	int dy = (int)(p.y())-rect.height()/2;
	
	if ( dx < 16 || dx > (m_canvas->width()) ) dx = 16;
	if ( dy < 16 || dy > (m_canvas->height()) ) dy = 16;
	
	item->move( dx, dy );
	item->show();
	
	registerItem(item);
// 	setModified(true);
	requestStateSave();
	return item;
}


void MechanicsDocument::deleteSelection()
{
	// End whatever editing mode we are in, as we don't want to start editing
	// something that is about to no longer exist...
	m_cmManager->cancelCurrentManipulation();
	
	if ( m_selectList->isEmpty() )
		return;
	
	// We nee to tell the selete items to remove themselves, and then
	// pass the items that have add themselves to the delete list to the
	// CommandAddItems command
	
	m_selectList->deleteAllItems();
	flushDeleteList();
	setModified(true);
	
	// We need to emit this so that property widgets etc...
	// can clear themselves.
	emit selectionChanged();
	requestStateSave();
}


bool MechanicsDocument::registerItem( KtlQCanvasItem *qcanvasItem )
{
	return ItemDocument::registerItem(qcanvasItem);
}


void MechanicsDocument::appendDeleteList( KtlQCanvasItem *qcanvasItem )
{
	MechanicsItem *mechItem = dynamic_cast<MechanicsItem*>(qcanvasItem);
	if ( !mechItem || m_itemDeleteList.contains(mechItem) ) {
		return;
	}
	
	m_itemDeleteList.append(mechItem);
	m_itemList.remove( mechItem->id() );
	
	disconnect( mechItem, SIGNAL(selectionChanged()), this, SIGNAL(selectionChanged()) );
	
	mechItem->removeItem();
}


void MechanicsDocument::flushDeleteList()
{
	// Remove duplicate items in the delete list
	ItemList::iterator end = m_itemDeleteList.end();
	for ( ItemList::iterator it = m_itemDeleteList.begin(); it != end; ++it )
	{
		if ( *it && m_itemDeleteList.count(*it) > 1 )
			*it = nullptr;
	}
	m_itemDeleteList.removeAll(QPointer<Item>(nullptr));
	
	end = m_itemDeleteList.end();
	for ( ItemList::iterator it = m_itemDeleteList.begin(); it != end; ++it )
	{
		m_itemList.remove( (*it)->id() );
		(*it)->setCanvas(nullptr);
		delete *it;
	}
}


MechanicsItem* MechanicsDocument::mechanicsItemWithID( const QString &id )
{
	return dynamic_cast<MechanicsItem*>(itemWithID(id));
}


void MechanicsDocument::selectAll()
{
	const ItemMap::iterator end = m_itemList.end();
	for ( ItemMap::iterator it = m_itemList.begin(); it != end; ++it )
	{
		select(*it);
	}
}


void MechanicsDocument::copy()
{
}
