/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "devicesettingswidget.h"
#include "ui_devicesettingswidget.h"

#include "devicefactoryselectiondialog.h"
#include "devicemanager.h"
#include "devicemanagermodel.h"
#include "deviceprocessesdialog.h"
#include "devicetestdialog.h"
#include "idevice.h"
#include "idevicefactory.h"
#include "idevicewidget.h"
#include <projectexplorer/projectexplorerconstants.h>

#include <coreplugin/icore.h>
#include <extensionsystem/pluginmanager.h>
#include <utils/qtcassert.h>
#include <utils/algorithm.h>

#include <QPixmap>
#include <QPushButton>
#include <QSignalMapper>
#include <QTextStream>

#include <algorithm>

using namespace Core;
using namespace Utils;

namespace ProjectExplorer {
namespace Internal {
const char LastDeviceIndexKey[] = "LastDisplayedMaemoDeviceConfig";

class NameValidator : public QValidator
{
public:
    NameValidator(const DeviceManager *deviceManager, QWidget *parent = 0)
        : QValidator(parent), m_deviceManager(deviceManager)
    {
    }

    void setDisplayName(const QString &name) { m_oldName = name; }

    virtual State validate(QString &input, int & /* pos */) const
    {
        if (input.trimmed().isEmpty()
                || (input != m_oldName && m_deviceManager->hasDevice(input)))
            return Intermediate;
        return Acceptable;
    }

    virtual void fixup(QString &input) const
    {
        int dummy = 0;
        if (validate(input, dummy) != Acceptable)
            input = m_oldName;
    }

private:
    QString m_oldName;
    const DeviceManager * const m_deviceManager;
};

DeviceSettingsWidget::DeviceSettingsWidget(QWidget *parent)
    : QWidget(parent),
      m_ui(new Ui::DeviceSettingsWidget),
      m_deviceManager(DeviceManager::cloneInstance()),
      m_deviceManagerModel(new DeviceManagerModel(m_deviceManager, this)),
      m_nameValidator(new NameValidator(m_deviceManager, this)),
      m_additionalActionsMapper(new QSignalMapper(this)),
      m_configWidget(0)
{
    initGui();
    connect(m_additionalActionsMapper, SIGNAL(mapped(int)),
            SLOT(handleAdditionalActionRequest(int)));
    connect(m_deviceManager, SIGNAL(deviceUpdated(Core::Id)), SLOT(handleDeviceUpdated(Core::Id)));
}

DeviceSettingsWidget::~DeviceSettingsWidget()
{
    DeviceManager::removeClonedInstance();
    delete m_configWidget;
    delete m_ui;
}

void DeviceSettingsWidget::initGui()
{
    m_ui->setupUi(this);
    m_ui->configurationComboBox->setModel(m_deviceManagerModel);
    m_ui->nameLineEdit->setValidator(m_nameValidator);

    const QList<IDeviceFactory *> &factories
        = ExtensionSystem::PluginManager::getObjects<IDeviceFactory>();

    bool hasDeviceFactories = Utils::anyOf(factories, [](IDeviceFactory *factory) {
                                               return factory->canCreate();
                                           });

    m_ui->addConfigButton->setEnabled(hasDeviceFactories);

    int lastIndex = Core::ICore::settings()
        ->value(QLatin1String(LastDeviceIndexKey), 0).toInt();
    if (lastIndex == -1)
        lastIndex = 0;
    if (lastIndex < m_ui->configurationComboBox->count())
        m_ui->configurationComboBox->setCurrentIndex(lastIndex);
    connect(m_ui->configurationComboBox, SIGNAL(currentIndexChanged(int)),
        SLOT(currentDeviceChanged(int)));
    currentDeviceChanged(currentIndex());
    connect(m_ui->defaultDeviceButton, SIGNAL(clicked()),
        SLOT(setDefaultDevice()));
}

void DeviceSettingsWidget::addDevice()
{
    DeviceFactorySelectionDialog d;
    if (d.exec() != QDialog::Accepted)
        return;

    Core::Id toCreate = d.selectedId();
    if (!toCreate.isValid())
        return;
    IDeviceFactory *factory = IDeviceFactory::find(toCreate);
    if (!factory)
        return;
    IDevice::Ptr device = factory->create(toCreate);
    if (device.isNull())
        return;

    m_deviceManager->addDevice(device);
    m_ui->removeConfigButton->setEnabled(true);
    m_ui->configurationComboBox->setCurrentIndex(m_deviceManagerModel->indexOf(device));
    if (device->hasDeviceTester())
        testDevice();
}

void DeviceSettingsWidget::removeDevice()
{
    m_deviceManager->removeDevice(currentDevice()->id());
    if (m_deviceManager->deviceCount() == 0)
        currentDeviceChanged(-1);
}

void DeviceSettingsWidget::displayCurrent()
{
    const IDevice::ConstPtr &current = currentDevice();
    m_ui->defaultDeviceButton->setEnabled(
        m_deviceManager->defaultDevice(current->type()) != current);
    m_ui->osTypeValueLabel->setText(current->displayType());
    m_ui->autoDetectionValueLabel->setText(current->isAutoDetected()
            ? tr("Yes (id is \"%1\")").arg(current->id().toString()) : tr("No"));
    m_nameValidator->setDisplayName(current->displayName());
    m_ui->deviceStateValueIconLabel->show();
    switch (current->deviceState()) {
    case IDevice::DeviceReadyToUse:
        m_ui->deviceStateValueIconLabel->setPixmap(QPixmap(QLatin1String(":/projectexplorer/images/DeviceReadyToUse.png")));
        break;
    case IDevice::DeviceConnected:
        m_ui->deviceStateValueIconLabel->setPixmap(QPixmap(QLatin1String(":/projectexplorer/images/DeviceConnected.png")));
        break;
    case IDevice::DeviceDisconnected:
        m_ui->deviceStateValueIconLabel->setPixmap(QPixmap(QLatin1String(":/projectexplorer/images/DeviceDisconnected.png")));
        break;
    case IDevice::DeviceStateUnknown:
        m_ui->deviceStateValueIconLabel->hide();
        break;
    }
    m_ui->deviceStateValueTextLabel->setText(current->deviceStateToString());

    m_ui->removeConfigButton->setEnabled(!current->isAutoDetected()
            || current->deviceState() == IDevice::DeviceDisconnected);
    fillInValues();
}

void DeviceSettingsWidget::setDeviceInfoWidgetsEnabled(bool enable)
{
    m_ui->configurationLabel->setEnabled(enable);
    m_ui->configurationComboBox->setEnabled(enable);
    m_ui->generalGroupBox->setEnabled(enable);
    m_ui->osSpecificGroupBox->setEnabled(enable);
}

void DeviceSettingsWidget::fillInValues()
{
    const IDevice::ConstPtr &current = currentDevice();
    m_ui->nameLineEdit->setText(current->displayName());
}

void DeviceSettingsWidget::updateDeviceFromUi()
{
    deviceNameEditingFinished();
    if (m_configWidget)
        m_configWidget->updateDeviceFromUi();
}

void DeviceSettingsWidget::saveSettings()
{
    Core::ICore::settings()->setValue(QLatin1String(LastDeviceIndexKey), currentIndex());
    DeviceManager::replaceInstance();
}

int DeviceSettingsWidget::currentIndex() const
{
    return m_ui->configurationComboBox->currentIndex();
}

IDevice::ConstPtr DeviceSettingsWidget::currentDevice() const
{
    Q_ASSERT(currentIndex() != -1);
    return m_deviceManagerModel->device(currentIndex());
}

void DeviceSettingsWidget::deviceNameEditingFinished()
{
    if (m_ui->configurationComboBox->count() == 0)
        return;

    const QString &newName = m_ui->nameLineEdit->text();
    m_deviceManager->mutableDevice(currentDevice()->id())->setDisplayName(newName);
    m_nameValidator->setDisplayName(newName);
    m_deviceManagerModel->updateDevice(currentDevice()->id());
}

void DeviceSettingsWidget::setDefaultDevice()
{
    m_deviceManager->setDefaultDevice(currentDevice()->id());
    m_ui->defaultDeviceButton->setEnabled(false);
}

void DeviceSettingsWidget::testDevice()
{
    const IDevice::ConstPtr &device = currentDevice();
    QTC_ASSERT(device && device->hasDeviceTester(), return);
    DeviceTestDialog dlg(device, this);
    dlg.exec();
}

void DeviceSettingsWidget::handleDeviceUpdated(Id id)
{
    const int index = m_deviceManagerModel->indexForId(id);
    if (index == currentIndex())
        currentDeviceChanged(index);
}

void DeviceSettingsWidget::currentDeviceChanged(int index)
{
    qDeleteAll(m_additionalActionButtons);
    delete m_configWidget;
    m_configWidget = 0;
    m_additionalActionButtons.clear();
    const IDevice::ConstPtr device = m_deviceManagerModel->device(index);
    if (device.isNull()) {
        setDeviceInfoWidgetsEnabled(false);
        m_ui->removeConfigButton->setEnabled(false);
        clearDetails();
        m_ui->defaultDeviceButton->setEnabled(false);
        return;
    }
    setDeviceInfoWidgetsEnabled(true);
    m_ui->removeConfigButton->setEnabled(true);

    if (device->hasDeviceTester()) {
        QPushButton * const button = new QPushButton(tr("Test"));
        m_additionalActionButtons << button;
        connect(button, SIGNAL(clicked()), SLOT(testDevice()));
        m_ui->buttonsLayout->insertWidget(m_ui->buttonsLayout->count() - 1, button);
    }

    if (device->canCreateProcessModel()) {
        QPushButton * const button = new QPushButton(tr("Show Running Processes..."));
        m_additionalActionButtons << button;
        connect(button, SIGNAL(clicked()), SLOT(handleProcessListRequested()));
        m_ui->buttonsLayout->insertWidget(m_ui->buttonsLayout->count() - 1, button);
    }

    foreach (Core::Id actionId, device->actionIds()) {
        QPushButton * const button = new QPushButton(device->displayNameForActionId(actionId));
        m_additionalActionButtons << button;
        connect(button, SIGNAL(clicked()), m_additionalActionsMapper, SLOT(map()));
        m_additionalActionsMapper->setMapping(button, actionId.uniqueIdentifier());
        m_ui->buttonsLayout->insertWidget(m_ui->buttonsLayout->count() - 1, button);
    }

    if (!m_ui->osSpecificGroupBox->layout())
        new QVBoxLayout(m_ui->osSpecificGroupBox);
    m_configWidget = m_deviceManager->mutableDevice(device->id())->createWidget();
    if (m_configWidget)
        m_ui->osSpecificGroupBox->layout()->addWidget(m_configWidget);
    displayCurrent();
}

void DeviceSettingsWidget::clearDetails()
{
    m_ui->nameLineEdit->clear();
    m_ui->osTypeValueLabel->clear();
    m_ui->autoDetectionValueLabel->clear();
}

void DeviceSettingsWidget::handleAdditionalActionRequest(int actionId)
{
    const IDevice::Ptr device = m_deviceManager->mutableDevice(currentDevice()->id());
    QTC_ASSERT(device, return);
    updateDeviceFromUi();
    device->executeAction(Core::Id::fromUniqueIdentifier(actionId), this);

    // Widget must be set up from scratch, because the action could have changed random attributes.
    currentDeviceChanged(currentIndex());
}

void DeviceSettingsWidget::handleProcessListRequested()
{
    QTC_ASSERT(currentDevice()->canCreateProcessModel(), return);
    updateDeviceFromUi();
    DeviceProcessesDialog dlg;
    dlg.addCloseButton();
    dlg.setDevice(currentDevice());
    dlg.exec();
}

} // namespace Internal
} // namespace ProjectExplorer