//##################################################################################################
//
//   Custom Visualization Core library
//   Copyright (C) 2011-2013 Ceetron AS
//
//   This library may be used under the terms of either the GNU General Public License or
//   the GNU Lesser General Public License as follows:
//
//   GNU General Public License Usage
//   This library 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 3 of the License, or
//   (at your option) any later version.
//
//   This library 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 at <<http://www.gnu.org/licenses/gpl.html>>
//   for more details.
//
//   GNU Lesser General Public License Usage
//   This library is free software; you can redistribute it and/or modify
//   it under the terms of the GNU Lesser General Public License as published by
//   the Free Software Foundation; either version 2.1 of the License, or
//   (at your option) any later version.
//
//   This library 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 Lesser General Public License at <<http://www.gnu.org/licenses/lgpl-2.1.html>>
//   for more details.
//
//##################################################################################################


#include "cafUtils.h"

#include <QtCore/QFileInfo>
#include <QtCore/QDir>

#include <QtGui/QLineEdit>

#include <QtOpenGL/QGLContext>

#include <QFileDialog>
#include <QMessageBox>

namespace caf {


    //--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
double Utils::editToDouble(QLineEdit* lineEdit, double defaultVal)
{
    if (!lineEdit) return false;
//    CVF_ASSERT(lineEdit);

    bool ok = false;
    double val = lineEdit->text().toDouble(&ok);
    if (ok)
    {
        return val;
    }
    else
    {
        return defaultVal;
    }
}


//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
QString Utils::absoluteFileName(const QString& fileName)
{
    QFileInfo fi(fileName);
    return QDir::toNativeSeparators(fi.absoluteFilePath());
}


//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
QStringList Utils::getFilesInDirectory(const QString& dirPath, const QString& filter, bool getAbsoluteFileNames)
{
    QDir::SortFlags sortFlags = QDir::SortFlags(QDir::Name | QDir::IgnoreCase);

    // Only get files
    QDir::Filters filters = QDir::Files;

    QDir dir(dirPath, filter, sortFlags, filters);

    QFileInfoList fileInfoList = dir.entryInfoList();
    
    QStringList retFileNames;

    QListIterator<QFileInfo> it(fileInfoList);
    while (it.hasNext())
    {
        QFileInfo fi = it.next();
        QString entry = getAbsoluteFileNames ? fi.absoluteFilePath() : fi.fileName();

        entry = QDir::toNativeSeparators(entry);
        retFileNames.push_back(entry);
    }

    return retFileNames;
}


//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
QString Utils::constructFullFileName(const QString& folder, const QString& baseFileName, const QString& extension)
{
    QFileInfo fi(folder, baseFileName + extension);
    QString fullFileName = fi.filePath();
    fullFileName = QDir::toNativeSeparators(fullFileName);

    return fullFileName;
}


//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
QString Utils::makeValidFileBasename(const QString& fileBasenameCandidate)
{
    QString cleanBasename = fileBasenameCandidate.trimmed();
    cleanBasename.replace(".", "_");
    cleanBasename.replace(",", "_");
    cleanBasename.replace(":", "_");
    cleanBasename.replace(";", "_");
    cleanBasename.replace(" ", "_");
    cleanBasename.replace("/", "_");
    cleanBasename.replace("\\", "_");
    cleanBasename.replace("<", "_");
    cleanBasename.replace(">", "_");
    cleanBasename.replace("\"", "_");
    cleanBasename.replace("|", "_");
    cleanBasename.replace("?", "_");
    cleanBasename.replace("*", "_");


    cleanBasename.replace(QRegExp("_+"), "_");

    return cleanBasename;  
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
QString Utils::indentString(int numSpacesToIndent, const QString& str)
{
    QString indentString;
    indentString.fill(' ', numSpacesToIndent);

    QStringList strList = str.split("\n");

    QString retStr = indentString + strList.join("\n" + indentString);
    return retStr;
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
bool Utils::getSaveDirectoryAndCheckOverwriteFiles(const QString& defaultDir, std::vector<QString> fileNames, QString* saveDir)
{
    bool overWriteFiles = false;
    (*saveDir) = QFileDialog::getExistingDirectory(NULL, "Select save directory", defaultDir);

    std::vector<QString> filesToOverwrite;
    for (QString fileName : fileNames)
    {
        QFileInfo fileInfo((*saveDir) + "/" +fileName);
        if (fileInfo.exists())
        {
            filesToOverwrite.push_back(fileName);
        }
    }

    if (filesToOverwrite.size() == 0)
    {
        overWriteFiles = true;
        return overWriteFiles;
    }
    else if (filesToOverwrite.size() > 0)
    {
        QMessageBox msgBox;

        QString message = "The following files will be overwritten in the export:";
        for (QString fileName : filesToOverwrite)
        {
            message += "\n" + (*saveDir) + "/" + fileName;
        }
        msgBox.setText(message);


        msgBox.setInformativeText("Do you want to continue?");
        msgBox.setStandardButtons(QMessageBox::Ok | QMessageBox::Cancel);
        msgBox.setDefaultButton(QMessageBox::Ok);
        int ret = msgBox.exec();

        switch (ret)
        {
        case QMessageBox::Ok:
            overWriteFiles = true;
            break;
        case QMessageBox::Cancel:
            overWriteFiles = false;
            break;
        default:
            // should never be reached
            break;
        }

    }

    return overWriteFiles;
}


//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
bool Utils::fileExists(const QString& fileName)
{
    QFileInfo fi(fileName);

    // QFileInfo::exists returns true for both files and folders
    // Also check if the path points to a file

    if (fi.exists() && fi.isFile())
    {
        return true;
    }

    return false;
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
QString Utils::fileExtension(const QString & fileName)
{
    QFileInfo fi(fileName);

    return fi.suffix();
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
bool Utils::isFolderWritable(const QString& folderName)
{
    // See platform issues here
    // http://doc.qt.io/qt-4.8/qfile.html#platform-specific-issues

    QFileInfo dir(folderName);
    
    return dir.isWritable();
}

//--------------------------------------------------------------------------------------------------
/// 
//--------------------------------------------------------------------------------------------------
bool Utils::isStringMatch(const QString& filterString, const QString& value)
{
    if (filterString.isEmpty()) return true;
    if (filterString.trimmed() == "*")
    {
        if (!value.isEmpty()) return true;
        else return false;
    }

    QRegExp searcher(filterString, Qt::CaseInsensitive, QRegExp::WildcardUnix);
    return searcher.exactMatch(value);
}

} // namespace caf