/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "directory.h"
#include <QDebug>

/*
Directory constructor

Initialize the saves directory and creates the file list
*/
Directory::Directory(QObject *parent) : QObject(parent)
{
    

    m_dir.cd( QDir::currentPath());
    
    //go to the saved directory. if not found, create save directory
    m_saveDir = "saves";
    if (m_dir.cd(m_saveDir) == 0){
        m_dir.mkdir(m_saveDir);
        m_dir.cd(m_saveDir);
    }
     m_filterList << "*.txt";

    refresh();
}

/*
Directory::filesNumber
Return the number of Files
*/
int Directory::    filesCount() const{
    return m_fileList.size();
}

/*
Function called to append data onto list property
*/
void appendFiles(QQmlListProperty<File> * property, File * file){
    //Do nothing. can't add to a directory using this method
}

/*
Function called to retrieve file in the list using an index
*/
File* fileAt(QQmlListProperty<File> * property, int index){
    return static_cast< QList<File *> *>(property->data)->at(index);
}

/*
Returns the number of files in the list
*/
int filesSize(QQmlListProperty<File> * property){
    return static_cast< QList<File *> *>(property->data)->size();
}

/*
Function called to empty the list property contents
*/
void clearFilesPtr(QQmlListProperty<File> *property){
    return static_cast< QList<File *> *>(property->data)->clear();
}

/*
Returns the list of files as a QQmlListProperty.
*/
QQmlListProperty<File> Directory::files(){

    refresh();
//     return QQmlListProperty<QString>(this,m_filePtrList);        //not recommended in the docs
    return QQmlListProperty<File>( this, &m_fileList, &appendFiles, &filesSize, &fileAt,  &clearFilesPtr );
}

/*
Return te name of the currently selected file
*/
QString Directory::filename() const{
    return currentFile.name();
}

/*
Return the file's content as a string.
*/
QString Directory::fileContent() const{
    return m_fileContent;
}

/*
Set the file name of the current file
*/
void Directory::setFilename(const QString &str){
    if(str != currentFile.name()){
        currentFile.setName(str);
        emit filenameChanged();
    }
}

/*
Set the content of the file as a string
*/
void Directory::setFileContent(const QString &str){
    if(str != m_fileContent){
        m_fileContent = str;
        emit fileContentChanged();
    }    
}

/*
Called from QML to save the file using the filename and file content.
Saving makes sure that the file has a .txt extension.
*/
void Directory::saveFile(){
    
    if(currentFile.name().size() == 0){
        qWarning()<< "Empty filename. no save";
        return;
    }
        
    QString extendedName = currentFile.name();
    if(!currentFile.name().endsWith(".txt")){
        extendedName.append(".txt");
    }
    
    QFile file( m_dir.filePath(extendedName) );
    if (file.open(QFile::WriteOnly | QFile::Truncate)){
        QTextStream outStream(&file);
        outStream << m_fileContent;
    }
    file.close();
    refresh();
    emit directoryChanged();
}

/*
Load the contents of a file.
Only loads files with a .txt extension
*/
void Directory::loadFile(){

    m_fileContent.clear();
    QString extendedName = currentFile.name();
    if(!currentFile.name().endsWith(".txt")){
        extendedName.append(".txt");
    }
    
    QFile file( m_dir.filePath(extendedName) );
    if (file.open(QFile::ReadOnly )){
        QTextStream inStream(&file);
        
        QString line;
        do{
            line = inStream.read(75);
            m_fileContent.append(line);
        }while (!line .isNull());
    }
    file.close();
}

/*
Reloads the content of the files list. This is to ensure that the newly
created files are added onto the list.
*/
void Directory::refresh(){
    m_dirFiles = m_dir.entryList(m_filterList,QDir::Files,QDir::Name);
    m_fileList.clear();
    
    File * file;
    for(int i = 0; i < m_dirFiles.size() ; i ++){
        
        file = new File();
        
        if(m_dirFiles.at(i).endsWith(".txt")){
            QString name = m_dirFiles.at(i);
            file->setName( name.remove(".txt",Qt::CaseSensitive));
        }
        else{
            file->setName(m_dirFiles.at(i));
        }
        m_fileList.append(file);
    }
}
