/*=========================================================================

   Program: ParaView
   Module:    pqFileDialogRecentDirsModel.cxx

   Copyright (c) 2005,2006 Sandia Corporation, Kitware Inc.
   All rights reserved.

   ParaView is a free software; you can redistribute it and/or modify it
   under the terms of the ParaView license version 1.2. 

   See License_v1.2.txt for the full ParaView license.
   A copy of this license can be obtained by contacting
   Kitware Inc.
   28 Corporate Drive
   Clifton Park, NY 12065
   USA

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 AUTHORS 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.

========================================================================*/
#include "pqFileDialogRecentDirsModel.h"
// Server Manager Includes.

// Qt Includes.

// ParaView Includes.
#include "pqFileDialogModel.h"
#include "pqServer.h"
#include "pqServerResource.h"
#include "pqApplicationCore.h"
#include "pqSettings.h"

#include <string>
#include <vtksys/SystemTools.hxx>

/////////////////////////////////////////////////////////////////////
// Icons
Q_GLOBAL_STATIC(pqFileDialogModelIconProvider, Icons);

//-----------------------------------------------------------------------------
pqFileDialogRecentDirsModel::pqFileDialogRecentDirsModel(
  pqFileDialogModel* fileDialogModel,
  pqServer* server, QObject* _parent):Superclass(_parent)
{
  this->FileDialogModel = fileDialogModel;

  // We need to determine the URI for this server to get the list of recent dirs
  // from the pqSettings. If server==NULL, we use the "builtin:" resource.
  pqServerResource resource = server? server->getResource():
    pqServerResource("builtin:");

  QString uri = resource.toURI();
  pqApplicationCore* core = pqApplicationCore::instance();
  pqSettings* settings = core->settings();

  QString key = QString("RecentDirs/%1").arg(uri);
  if (settings->contains(key))
    {
    QStringList dirs = settings->value(key).toStringList();
    // ensure that the directories exist.
    foreach (QString dir, dirs)
      {
      QString temp;
      if (!this->FileDialogModel || this->FileDialogModel->dirExists(dir, temp))
        {
        this->Directories.push_back(dir);
        }
      }
    }
  this->SettingsKey = key;
}

//-----------------------------------------------------------------------------
pqFileDialogRecentDirsModel::~pqFileDialogRecentDirsModel()
{
  pqApplicationCore* core = pqApplicationCore::instance();
  pqSettings* settings = core->settings();
  if (settings)
    {
    settings->setValue(this->SettingsKey, QVariant(this->Directories));
    }
}

//-----------------------------------------------------------------------------
/// returns the path.
QString pqFileDialogRecentDirsModel::filePath(const QModelIndex& idx) const
{
  if (idx.row() < this->Directories.size())
    {
    return this->Directories[idx.row()];
    }
  return QString();
}

//-----------------------------------------------------------------------------
/// returns the data for an item
QVariant pqFileDialogRecentDirsModel::data(const QModelIndex& idx, int role) const

{
  if (idx.isValid() && idx.row() < this->Directories.size())
    {
    switch (role)
      {
    case Qt::DisplayRole:
        {
        // We only return the directory name, not the full path.
        QString path = this->Directories[idx.row()];
        // We don't use QFileInfo here since it messes the paths up if the client and
        // the server are heterogeneous systems.
        std::string unix_path = path.toLatin1().data();
        vtksys::SystemTools::ConvertToUnixSlashes(unix_path);
        std::string filename;
        std::string::size_type slashPos = unix_path.rfind("/");
        if (slashPos != std::string::npos)
          {
          filename = unix_path.substr(slashPos+1);
          }
        else
          {
          filename = unix_path;
          }
        return filename.c_str();
        }

    case Qt::ToolTipRole:
    case Qt::StatusTipRole:
      return this->Directories[idx.row()];

    case Qt::DecorationRole:
      return Icons()->icon(pqFileDialogModelIconProvider::Folder);
      }
    }

  return QVariant();
}
 
//-----------------------------------------------------------------------------
/// return the number of rows in the model 
int pqFileDialogRecentDirsModel::rowCount(const QModelIndex&) const
{
  return this->Directories.size();
}

//-----------------------------------------------------------------------------
/// return header data
QVariant pqFileDialogRecentDirsModel::headerData(
  int section, Qt::Orientation, int role) const
{
  if (role == Qt::DisplayRole && section == 0)
    {
    return tr("Recent Directories");
    }

  return QVariant();
}

//-----------------------------------------------------------------------------
void pqFileDialogRecentDirsModel::setChosenDir(const QString& dir)
{
  QString temp;
  if (!dir.isEmpty() && 
    (!this->FileDialogModel || this->FileDialogModel->dirExists(dir, temp)))
    {
    this->Directories.removeAll(dir);
    this->Directories.push_front(dir);
    // For now only 5 paths are saved in the most recent list.
    this->Directories = this->Directories.mid(0, 5);
    }
}

//-----------------------------------------------------------------------------
void pqFileDialogRecentDirsModel::setChosenFiles(const QList<QStringList> &files)
{
  if (files.size() <= 0)
    {
    return;
    }
  QString filename = files[0][0];

  // We don't use QFileInfo here since it messes the paths up if the client and
  // the server are heterogeneous systems.
  std::string unix_path = filename.toLatin1().data();
  vtksys::SystemTools::ConvertToUnixSlashes(unix_path);

  std::string dirname;
  std::string::size_type slashPos = unix_path.rfind("/");
  if (slashPos == std::string::npos)
    {
    return;
    }
  dirname = unix_path.substr(0, slashPos);
  this->setChosenDir(dirname.c_str());
}
