/*
                Copyright 2006-2015 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 "elementcollectionhandler.h"
#include "renamedialog.h"
#include "xmlelementcollection.h"
#include "qetxml.h"
#include <QFile>
#include <QDir>

ECHStrategy::ECHStrategy(ElementLocation &source, ElementLocation &destination) :
    m_source(source),
    m_destination (destination)
{}

ECHStrategy::~ECHStrategy() {}

/******************************************************/

ECHSFileToFile::ECHSFileToFile(ElementLocation &source, ElementLocation &destination) :
    ECHStrategy(source, destination)
{}

ElementLocation ECHSFileToFile::copy()
{
		//Check if the destination already have an item with the same name of the item to copy
	ElementLocation location(m_destination.fileSystemPath() + "/" + m_source.fileName());
	QString rename;
	if (location.exist())
	{
		RenameDialog rd(location.fileSystemPath());
		if (rd.exec() == QDialog::Accepted)
		{
			if (rd.selectedAction() == QET::Erase)
			{
				if (location.isDirectory())
				{
					QDir dir(location.fileSystemPath());
					dir.removeRecursively();
				}
				else
				{
					QFile file(location.fileSystemPath());
					file.remove();
				}
			}
			else if (rd.selectedAction() == QET::Rename)
			{
				rename = rd.newName();
			}
		}
		else
			return ElementLocation();
	}

	if (m_source.isElement())
		return copyElement(m_source, m_destination, rename);
    else
		return copyDirectory(m_source, m_destination, rename);
}

ElementLocation ECHSFileToFile::copyDirectory(ElementLocation &source, ElementLocation &destination, QString rename)
{
    QDir source_dir(source.fileSystemPath());
    QDir destination_dir(destination.fileSystemPath());

    if (!source_dir.exists() || !destination_dir.exists()) return ElementLocation();

    QString new_dir_name = rename.isEmpty() ? source_dir.dirName() : rename;

        //Create a new dir
    if (destination_dir.mkdir(new_dir_name))
    {
            //The new created directory
        QDir created_dir(destination_dir.canonicalPath() + "/" + new_dir_name);

            //Copy the qet_directory file
        QFile::copy(source_dir.canonicalPath() + "/qet_directory", created_dir.canonicalPath() + "/qet_directory");

            //Copy all dirs found in source_dir to destination_dir
        ElementLocation created_location(created_dir.canonicalPath());
        foreach(QString str, source_dir.entryList(QDir::Dirs | QDir::NoDotAndDotDot, QDir::Name))
        {
            ElementLocation sub_source(source.fileSystemPath() + "/" + str);
            copyDirectory(sub_source, created_location);
        }

            //Copy all elements found in source_dir to destination_dir
        source_dir.setNameFilters(QStringList() << "*.elmt");
        foreach(QString str, source_dir.entryList(QDir::Files | QDir::NoDotAndDotDot, QDir::Name))
        {
            ElementLocation sub_source(source.fileSystemPath() + "/" + str);
            copyElement(sub_source, created_location);
        }

        return created_location;
    }

    return ElementLocation();
}

ElementLocation ECHSFileToFile::copyElement(ElementLocation &source, ElementLocation &destination, QString rename)
{
    QString new_elmt_name = rename.isEmpty() ? source.fileName() : rename;
    bool rb = QFile::copy(source.fileSystemPath(), destination.fileSystemPath() + "/" + new_elmt_name);
    if (rb)
        return ElementLocation (destination.fileSystemPath() + "/" + new_elmt_name);
    else
        return ElementLocation();
}

/******************************************************/

ECHSToXml::ECHSToXml(ElementLocation &source, ElementLocation &destination) :
	ECHStrategy(source, destination)
{}

ElementLocation ECHSToXml::copy()
{
	if (!(m_source.exist() && m_destination.isDirectory() && m_destination.isProject())) return ElementLocation();

		//Check if the destination already have an item with the same name of the item to copy
	ElementLocation location(m_destination.projectCollectionPath() + "/" + m_source.fileName());

	QString rename;
	if (location.exist())
	{
		RenameDialog rd(location.collectionPath());
		if(rd.exec() == QDialog::Accepted)
		{
			if (rd.selectedAction() == QET::Rename)
				rename = rd.newName();
		}
		else
			return ElementLocation();
	}

	return m_destination.projectCollection()->copy(m_source, m_destination, rename);
}

/**
 * @brief ElementCollectionHandler::ElementCollectionHandler
 * @param widget
 */
ElementCollectionHandler::ElementCollectionHandler() {}

ElementCollectionHandler::~ElementCollectionHandler()
{
    if (m_strategy) delete m_strategy;
}

/**
 * @brief ElementCollectionHandler::copy
 * Copy the content of collection represented by source to the collection represented by destination.
 * Destination must be a directory, else the copy do nothing and return a null ElementLocation
 * if destination have an item with the same name of source, a dialog ask to user what to do.
 * @param source
 * @param destination
 * @return
 */
ElementLocation ElementCollectionHandler::copy(ElementLocation &source, ElementLocation &destination)
{
    if (!source.exist() || !destination.exist() || destination.isElement()) return ElementLocation();

    if (source.isFileSystem() && destination.isFileSystem()) m_strategy = new ECHSFileToFile(source, destination);
	else if (destination.isProject()) m_strategy = new ECHSToXml(source, destination);

	if (m_strategy)
		return m_strategy->copy();
	else
		return ElementLocation();
}