/****************************************************************************
**
** 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:
**
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** met:
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**     notice, this list of conditions and the following disclaimer.
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**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
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**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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****************************************************************************/

#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)
{
    Q_UNUSED(property);
    Q_UNUSED(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<File>(this, &m_fileList, &appendFiles, &filesSize, &fileAt, &clearFilesPtr);
}

/*
Return the 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().isEmpty()) {
        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);
        m_fileContent = inStream.readAll();
    }
    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);
    }
}
