/*
 * 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 PROPLISTDELEGATE_H
#define PROPLISTDELEGATE_H

#include <QItemDelegate>
#include <QStyleOptionProgressBarV2>
#include <QStyleOptionViewItemV2>
#include <QStyleOptionComboBox>
#include <QComboBox>
#include <QModelIndex>
#include <QPainter>
#include <QProgressBar>
#include <QApplication>
#include "misc.h"
#include "propertieswidget.h"

// Defines for properties list columns
enum PropColumn {NAME, SIZE, PROGRESS, PRIORITY};
enum PropPriority {IGNORED=0, NORMAL=1, HIGH=2, MAXIMUM=7};

class PropListDelegate: public QItemDelegate {
  Q_OBJECT

private:
  PropertiesWidget *properties;

signals:
  void filteredFilesChanged() const;

public:
  PropListDelegate(PropertiesWidget* properties=0, QObject *parent=0) : QItemDelegate(parent), properties(properties){
  }

  ~PropListDelegate(){}

  void paint(QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index) const{
    QStyleOptionViewItemV2 opt = QItemDelegate::setOptions(index, option);
    switch(index.column()){
        case SIZE:
      QItemDelegate::drawBackground(painter, opt, index);
      QItemDelegate::drawDisplay(painter, opt, option.rect, misc::friendlyUnit(index.data().toLongLong()));
      break;
        case PROGRESS:{
            QStyleOptionProgressBarV2 newopt;
            float progress = index.data().toDouble()*100.;
            newopt.rect = opt.rect;
            newopt.text = QString(QByteArray::number(progress, 'f', 1))+QString::fromUtf8("%");
            newopt.progress = (int)progress;
            newopt.maximum = 100;
            newopt.minimum = 0;
            newopt.state |= QStyle::State_Enabled;
            newopt.textVisible = true;
            QApplication::style()->drawControl(QStyle::CE_ProgressBar, &newopt, painter);
            break;
          }
        case PRIORITY:{
            QStyleOptionComboBox newopt;
            newopt.rect = opt.rect;
            switch(index.data().toInt()){
            case IGNORED:
              newopt.currentText = tr("Ignored");
              break;
            case NORMAL:
              newopt.currentText = tr("Normal", "Normal (priority)");
              break;
            case HIGH:
              newopt.currentText = tr("High", "High (priority)");
              break;
            case MAXIMUM:
              newopt.currentText = tr("Maximum", "Maximum (priority)");
              break;
            default:
              qDebug("Unhandled priority, setting NORMAL");
              newopt.currentText = tr("Normal", "Normal (priority)");
            }
            //newopt.state |= QStyle::State_Enabled;
            //newopt.subControls = QStyle::SC_All;
            //painter->translate(QPoint(opt.rect.x()*-1,opt.rect.y()*-1));
            //QApplication::style()->drawComplexControl(QStyle::CC_ComboBox, &newopt, painter);
            //painter->translate(QPoint(opt.rect.x(),opt.rect.y()));
            //QApplication::style()->drawControl(QStyle::CE_ComboBoxLabel, &newopt, painter);
            QItemDelegate::drawBackground(painter, opt, index);
            QItemDelegate::drawDisplay(painter, opt, option.rect, newopt.currentText);
            break;
          }
        default:
          QItemDelegate::paint(painter, option, index);
        }
  }

  QWidget* createEditor(QWidget *parent, const QStyleOptionViewItem &/* option */, const QModelIndex & index) const {
    qDebug("CreateEditor called");
    if(index.column() != PRIORITY) return 0;
    if(properties) {
      QTorrentHandle h = properties->getCurrentTorrent();
      if(!h.is_valid() || h.is_seed()) return 0;
    }
    QComboBox* editor = new QComboBox(parent);
    editor->setFocusPolicy(Qt::StrongFocus);
    editor->addItem(tr("Ignored"));
    editor->addItem(tr("Normal", "Normal (priority)"));
    editor->addItem(tr("High", "High (priority)"));
    editor->addItem(tr("Maximum", "Maximum (priority)"));
    return editor;
  }

  void setEditorData(QWidget *editor, const QModelIndex &index) const {
    qDebug("setEditorData called");
    unsigned short val = index.model()->data(index, Qt::DisplayRole).toInt();
    QComboBox *combobox = static_cast<QComboBox*>(editor);
    qDebug("Set Editor data: Prio is %d", val);
    switch(val){
        case IGNORED:
      combobox->setCurrentIndex(0);
      break;
        case NORMAL:
      combobox->setCurrentIndex(1);
      break;
        case HIGH:
      combobox->setCurrentIndex(2);
      break;
        case MAXIMUM:
      combobox->setCurrentIndex(3);
      break;
        default:
      qDebug("Unhandled priority, setting to NORMAL");
      combobox->setCurrentIndex(1);
    }
  }

  QSize sizeHint(const QStyleOptionViewItem & option, const QModelIndex & index) const{
    QVariant value = index.data(Qt::FontRole);
    QFont fnt = value.isValid() ? qvariant_cast<QFont>(value) : option.font;
    QFontMetrics fontMetrics(fnt);
    const QString text = index.data(Qt::DisplayRole).toString();
    QRect textRect = QRect(0, 0, 0, fontMetrics.lineSpacing() * (text.count(QLatin1Char('\n')) + 1));
    textRect.setHeight(textRect.height()+4);
    return textRect.size();
  }

    public slots:
  void setModelData(QWidget *editor, QAbstractItemModel *model, const QModelIndex &index) const {
    QComboBox *combobox = static_cast<QComboBox*>(editor);
    int value = combobox->currentIndex();
    qDebug("Setting combobox value in index: %d", value);
    unsigned short old_val = index.model()->data(index, Qt::DisplayRole).toInt();
    switch(value){
        case 0:
      if(old_val != IGNORED){
        model->setData(index, QVariant(IGNORED));
        emit filteredFilesChanged();
      } else {
        // XXX: hack to force the model to send the itemChanged() signal
        model->setData(index, QVariant(NORMAL));
        model->setData(index, QVariant(IGNORED));
      }
      break;
        case 1:
      //           if(old_val != NORMAL){
      //             model->setData(index, QVariant(NORMAL));
      //             if(filteredFilesChanged != 0)
      //               *filteredFilesChanged = true;
      //           } else {
      model->setData(index, QVariant(HIGH));
      model->setData(index, QVariant(NORMAL));
      emit filteredFilesChanged();
      //           }
      break;
        case 2:
      if(old_val != HIGH){
        model->setData(index, QVariant(HIGH));
        emit filteredFilesChanged();
      } else {
        model->setData(index, QVariant(NORMAL));
        model->setData(index, QVariant(HIGH));
      }
      break;
        case 3:
      if(old_val != MAXIMUM){
        model->setData(index, QVariant(MAXIMUM));
        emit filteredFilesChanged();
      } else {
        model->setData(index, QVariant(HIGH));
        model->setData(index, QVariant(MAXIMUM));
      }
      break;
        default:
      if(old_val != NORMAL){
        model->setData(index, QVariant(NORMAL));
        emit filteredFilesChanged();
      } else {
        model->setData(index, QVariant(HIGH));
        model->setData(index, QVariant(NORMAL));
      }
    }
  }

  void updateEditorGeometry(QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &/* index */) const {
    qDebug("UpdateEditor Geometry called");
    editor->setGeometry(option.rect);
  }

};

#endif
