/*
  objectdynamicpropertymodel.cpp

  This file is part of GammaRay, the Qt application inspection and
  manipulation tool.

  Copyright (C) 2010-2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
  Author: Volker Krause <volker.krause@kdab.com>

  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, see <http://www.gnu.org/licenses/>.
*/

#include "objectdynamicpropertymodel.h"
#include "varianthandler.h"
#include "toolmodel.h"
#include "probe.h"
#include "toolfactory.h"
#include "metaobjectrepository.h"

#include <common/propertymodel.h>

#include <QEvent>

using namespace GammaRay;

ObjectDynamicPropertyModel::ObjectDynamicPropertyModel(QObject *parent)
  : ObjectPropertyModel(parent), m_propertyCount(0)
{
  connect(this, SIGNAL(modelReset()), SLOT(updatePropertyCount()));
}

QVariant ObjectDynamicPropertyModel::data(const QModelIndex &index, int role) const
{
  if (!m_obj) {
    return QVariant();
  }

  const QList<QByteArray> propNames = m_obj.data()->dynamicPropertyNames();
  if (index.row() < 0 || index.row() >= propNames.size()) {
    return QVariant();
  }

  const QByteArray propName = propNames.at(index.row());
  const QVariant propValue = m_obj.data()->property(propName);

  if (role == Qt::DisplayRole || role == Qt::EditRole) {
    if (index.column() == 0) {
      return QString::fromUtf8(propName);
    } else if (index.column() == 1) {
      return role == Qt::EditRole ? propValue : VariantHandler::displayString(propValue);
    } else if (index.column() == 2) {
      return propValue.typeName();
    } else if (index.column() == 3) {
      return tr("<dynamic>");
    }
  } else if (role == PropertyModel::ActionRole) {
    return PropertyModel::Delete
         | ((MetaObjectRepository::instance()->metaObject(propValue.typeName()) && *reinterpret_cast<void* const*>(propValue.data())) || propValue.value<QObject*>()
            ? PropertyModel::NavigateTo
            : PropertyModel::NoAction);
  } else if (role == PropertyModel::ValueRole) {
    return propValue;
  } else if (role == PropertyModel::AppropriateToolRole) {
    ToolModel *toolModel = Probe::instance()->toolModel();
    ToolFactory *factory;
    if (propValue.canConvert<QObject*>())
      factory = toolModel->data(toolModel->toolForObject(propValue.value<QObject*>()), ToolModelRole::ToolFactory).value<ToolFactory*>();
    else
      factory = toolModel->data(toolModel->toolForObject(*reinterpret_cast<void* const*>(propValue.data()), propValue.typeName()), ToolModelRole::ToolFactory).value<ToolFactory*>();
    if (factory) {
      return factory->name();
    }
    return QVariant();
  }

  return QVariant();
}

bool ObjectDynamicPropertyModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
  if (!m_obj) {
    return false;
  }

  const QList<QByteArray> propNames = m_obj.data()->dynamicPropertyNames();
  if (index.row() < 0 || index.row() >= propNames.size()) {
    return false;
  }

  if (role == Qt::EditRole) {
    const QByteArray propName = propNames.at(index.row());
    m_obj.data()->setProperty(propName, value);
    emit dataChanged(index, index);
    return true;
  }

  return QAbstractItemModel::setData(index, value, role);
}

Qt::ItemFlags ObjectDynamicPropertyModel::flags(const QModelIndex &index) const
{
  const Qt::ItemFlags flags = ObjectPropertyModel::flags(index);

  if (!index.isValid() || !m_obj || index.column() != 1) {
    return flags;
  }

  return flags | Qt::ItemIsEditable;
}

int ObjectDynamicPropertyModel::rowCount(const QModelIndex &parent) const
{
  if (!m_obj || parent.isValid()) {
    return 0;
  }
  return m_obj.data()->dynamicPropertyNames().size();
}

void ObjectDynamicPropertyModel::monitorObject(QObject* obj)
{
  obj->installEventFilter(this);
}

void ObjectDynamicPropertyModel::unmonitorObject(QObject* obj)
{
  obj->removeEventFilter(this);
}

bool ObjectDynamicPropertyModel::eventFilter(QObject* receiver, QEvent* event)
{
  if (receiver == m_obj && event->type() == QEvent::DynamicPropertyChange) {
    const int newPropertyCount = m_obj->dynamicPropertyNames().size();
    if (newPropertyCount != m_propertyCount) {
      // FIXME: this can be done more efficiently...
      reset();
    } else {
      // FIXME: send dataChanged for the affected cell only
      updateAll();
    }
  }
  return ObjectPropertyModel::eventFilter(receiver, event);
}

void ObjectDynamicPropertyModel::updatePropertyCount()
{
  m_propertyCount = rowCount();
}
