/*
 * Bittorrent Client using Qt4 and libtorrent.
 * Copyright (C) 2006  Christophe Dumez
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * In addition, as a special exception, the copyright holders give permission to
 * link this program with the OpenSSL project's "OpenSSL" library (or with
 * modified versions of it that use the same license as the "OpenSSL" library),
 * and distribute the linked executables. You must obey the GNU General Public
 * License in all respects for all of the code used other than "OpenSSL".  If you
 * modify file(s), you may extend this exception to your version of the file(s),
 * but you are not obligated to do so. If you do not wish to do so, delete this
 * exception statement from your version.
 *
 * Contact : chris@qbittorrent.org
 */

#ifndef PREVIEWSELECT_H
#define PREVIEWSELECT_H

#include <QDialog>
#include <QStandardItemModel>
#include <QHeaderView>
#include <QMessageBox>
#include <QFile>
#include <libtorrent/version.hpp>
#include <libtorrent/session.hpp>
#include "ui_preview.h"
#include "previewlistdelegate.h"
#include "misc.h"
#include "qtorrenthandle.h"

#define NAME 0
#define SIZE 1
#define PROGRESS 2

using namespace libtorrent;

class previewSelect: public QDialog, private Ui::preview {
  Q_OBJECT

private:
  QStandardItemModel *previewListModel;
  PreviewListDelegate *listDelegate;
  QTorrentHandle h;
  QList<int> indexes;

signals:
  void readyToPreviewFile(QString) const;

protected slots:
  void on_previewButton_clicked(){
    QModelIndex index;
    QModelIndexList selectedIndexes = previewList->selectionModel()->selectedRows(NAME);
    if(selectedIndexes.size() == 0) return;
#if LIBTORRENT_VERSION_MINOR > 14
    // Flush data
    h.flush_cache();
#endif
    QString path;
    foreach(index, selectedIndexes){
      path = h.files_path().at(indexes.at(index.row()));
      // File
      if(QFile::exists(path)){
        emit readyToPreviewFile(path);
      } else {
        QMessageBox::critical(0, tr("Preview impossible"), tr("Sorry, we can't preview this file"));
      }
      close();
      return;
    }
    qDebug("Cannot find file: %s", path.toLocal8Bit().data());
    QMessageBox::critical(0, tr("Preview impossible"), tr("Sorry, we can't preview this file"));
    close();
  }

  void on_cancelButton_clicked(){
    close();
  }

public:
  previewSelect(QWidget* parent, QTorrentHandle h): QDialog(parent), h(h){
    setupUi(this);
    setAttribute(Qt::WA_DeleteOnClose);
    // Preview list
    previewListModel = new QStandardItemModel(0, 3);
    previewListModel->setHeaderData(NAME, Qt::Horizontal, tr("Name"));
    previewListModel->setHeaderData(SIZE, Qt::Horizontal, tr("Size"));
    previewListModel->setHeaderData(PROGRESS, Qt::Horizontal, tr("Progress"));
    previewList->setModel(previewListModel);
    listDelegate = new PreviewListDelegate(this);
    previewList->setItemDelegate(listDelegate);
    previewList->header()->resizeSection(0, 200);
    // Fill list in
    std::vector<size_type> fp;
    h.file_progress(fp);
    unsigned int nbFiles = h.num_files();
    for(unsigned int i=0; i<nbFiles; ++i){
      QString fileName = h.file_at(i);
      QString extension = fileName.split(QString::fromUtf8(".")).last().toUpper();
      if(misc::isPreviewable(extension)) {
        int row = previewListModel->rowCount();
        previewListModel->insertRow(row);
        previewListModel->setData(previewListModel->index(row, NAME), QVariant(fileName));
        previewListModel->setData(previewListModel->index(row, SIZE), QVariant((qlonglong)h.filesize_at(i)));
        previewListModel->setData(previewListModel->index(row, PROGRESS), QVariant((double)fp[i]/h.filesize_at(i)));
        indexes << i;
      }
    }
    previewList->selectionModel()->select(previewListModel->index(0, NAME), QItemSelectionModel::Select);
    previewList->selectionModel()->select(previewListModel->index(0, SIZE), QItemSelectionModel::Select);
    previewList->selectionModel()->select(previewListModel->index(0, PROGRESS), QItemSelectionModel::Select);
    if(!previewListModel->rowCount()){
      QMessageBox::critical(0, tr("Preview impossible"), tr("Sorry, we can't preview this file"));
      close();
    }
    connect(this, SIGNAL(readyToPreviewFile(QString)), parent, SLOT(previewFile(QString)));
    if(previewListModel->rowCount() == 1){
      qDebug("Torrent file only contains one file, no need to display selection dialog before preview");
      // Only one file : no choice
      on_previewButton_clicked();
    }else{
      qDebug("Displaying media file selection dialog for preview");
      show();
    }
  }

  ~previewSelect(){
    delete previewListModel;
    delete listDelegate;
  }
};

#endif
