/*
  attachdialog.h

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

  Copyright (C) 2010-2015 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com
  Author: Milian Wolff <milian.wolff@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 "attachdialog.h"

#include "launchoptions.h"
#include "processfiltermodel.h"
#include "processmodel.h"
#include "probeabimodel.h"

#include <QPushButton>
#include <QStandardItemModel>
#include <QListView>
#include <QTimer>
#include <QFutureWatcher>
#include <QtConcurrentRun>
#include <QStackedWidget>
#include <QStringListModel>
#include <QSettings>

using namespace GammaRay;

AttachDialog::AttachDialog(QWidget *parent, Qt::WindowFlags f)
: QWidget(parent, f),
  m_abiModel(new ProbeABIModel(this))
{
  ui.setupUi(this);

  m_model = new ProcessModel(this);

  m_proxyModel = new ProcessFilterModel(this);
  m_proxyModel->setSourceModel(m_model);
  m_proxyModel->setDynamicSortFilter(true);

  ui.view->setModel(m_proxyModel);
  // hide state
  ui.view->hideColumn(ProcessModel::StateColumn);
  ui.view->sortByColumn(ProcessModel::NameColumn, Qt::AscendingOrder);
  ui.view->setSortingEnabled(true);

  ui.view->setEditTriggers(QAbstractItemView::NoEditTriggers);

  ui.view->setSelectionBehavior(QAbstractItemView::SelectRows);
  ui.view->setSelectionMode(QAbstractItemView::SingleSelection);
  connect(ui.view->selectionModel(), SIGNAL(currentRowChanged(QModelIndex,QModelIndex)),
          this, SIGNAL(updateButtonState()));
  connect(ui.view->selectionModel(), SIGNAL(currentChanged(QModelIndex,QModelIndex)),
          this, SLOT(selectABI(QModelIndex)));

  connect(ui.view, SIGNAL(activated(QModelIndex)), SIGNAL(activate()));

  ui.filter->setProxy(m_proxyModel);

  ui.probeBox->setModel(m_abiModel);

  QSettings settings;
  ui.accessMode->setCurrentIndex(settings.value(QLatin1String("Launcher/AttachAccessMode")).toInt());

  setWindowTitle(tr("GammaRay - Attach to Process"));
  setWindowIcon(QIcon(":gammaray/GammaRay-128x128.png"));

  ui.stackedWidget->setCurrentWidget(ui.loadingLabel);
  emit updateButtonState();
  updateProcesses();
}

bool AttachDialog::isValid() const
{
  return ui.view->currentIndex().isValid();
}

void AttachDialog::writeSettings()
{
  QSettings settings;
  settings.setValue(QLatin1String("Launcher/AttachAccessMode"), ui.accessMode->currentIndex());
}

LaunchOptions AttachDialog::launchOptions() const
{
  LaunchOptions opt;
  opt.setPid(pid());
  opt.setProbeABI(ui.probeBox->itemData(ui.probeBox->currentIndex()).value<ProbeABI>());

  switch (ui.accessMode->currentIndex()) {
    case 0: // local, out-of-process
      opt.setProbeSetting("TCPServer", "127.0.0.1");
      opt.setUiMode(LaunchOptions::OutOfProcessUi);
      break;
    case 1: // remote, out-of-process
      opt.setProbeSetting("TCPServer", "0.0.0.0");
      opt.setUiMode(LaunchOptions::OutOfProcessUi);
      break;
    case 2: // in-process
      opt.setProbeSetting("RemoteAccessEnabled", false);
      opt.setUiMode(LaunchOptions::InProcessUi);
      break;
  }

  return opt;
}

int AttachDialog::pid() const
{
  return ui.view->currentIndex().data(ProcessModel::PIDRole).toInt();
}

void AttachDialog::updateProcesses()
{
  QFutureWatcher<ProcDataList>* watcher = new QFutureWatcher<ProcDataList>(this);
  connect(watcher, SIGNAL(finished()),
          this, SLOT(updateProcessesFinished()));
  watcher->setFuture(QtConcurrent::run(processList, m_model->processes()));
}

void AttachDialog::updateProcessesFinished()
{
  QFutureWatcher<ProcDataList>* watcher = dynamic_cast<QFutureWatcher<ProcDataList>*>(sender());
  Q_ASSERT(watcher);
  ui.stackedWidget->setCurrentWidget(ui.listViewPage);
  const int oldPid = pid();
  m_model->mergeProcesses(watcher->result());
  if (oldPid != pid()) {
    ui.view->setCurrentIndex(QModelIndex());
  }
  watcher->deleteLater();

  QTimer::singleShot(1000, this, SLOT(updateProcesses()));
}

void AttachDialog::selectABI(const QModelIndex& processIndex)
{
  if (!processIndex.isValid())
    return;

  const ProbeABI abi = processIndex.data(ProcessModel::ABIRole).value<ProbeABI>();
  const int abiIndex = m_abiModel->indexOfBestMatchingABI(abi);
  if (abiIndex >= 0)
    ui.probeBox->setCurrentIndex(abiIndex);
}
