/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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****************************************************************************/

#include "edit3dwidget.h"
#include "edit3dview.h"
#include "edit3dcanvas.h"
#include "edit3dactions.h"

#include "qmldesignerplugin.h"
#include "designersettings.h"
#include "qmldesignerconstants.h"
#include "viewmanager.h"

#include <coreplugin/actionmanager/actionmanager.h>
#include <coreplugin/actionmanager/command.h>
#include <coreplugin/icore.h>
#include <toolbox.h>
#include <utils/utilsicons.h>
#include <QVBoxLayout>

namespace QmlDesigner {

Edit3DWidget::Edit3DWidget(Edit3DView *view) :
    m_view(view)
{
    Core::Context context(Constants::C_QMLEDITOR3D);
    m_context = new Core::IContext(this);
    m_context->setContext(context);
    m_context->setWidget(this);

    setMouseTracking(true);
    setFocusPolicy(Qt::WheelFocus);

    auto fillLayout = new QVBoxLayout(this);
    fillLayout->setContentsMargins(0, 0, 0, 0);
    fillLayout->setSpacing(0);
    setLayout(fillLayout);

    // Initialize toolbar
    m_toolBox = new ToolBox(this);
    fillLayout->addWidget(m_toolBox.data());

    // Iterate through view actions. A null action indicates a separator and a second null action
    // after separator indicates an exclusive group.
    auto addActionsToToolBox = [this, &context](const QVector<Edit3DAction *> &actions, bool left) {
        bool previousWasSeparator = true;
        QActionGroup *group = nullptr;
        for (auto action : actions) {
            if (action) {
                if (group)
                    group->addAction(action->action());
                addAction(action->action());
                if (left)
                    m_toolBox->addLeftSideAction(action->action());
                else
                    m_toolBox->addRightSideAction(action->action());
                previousWasSeparator = false;

                // Register action as creator command to make it configurable
                Core::Command *command = Core::ActionManager::registerAction(
                            action->action(), action->menuId().data(), context);
                command->setDefaultKeySequence(action->action()->shortcut());
                command->augmentActionWithShortcutToolTip(action->action());
                // Clear action shortcut so it doesn't conflict with command's override action
                action->action()->setShortcut({});
            } else {
                if (previousWasSeparator) {
                    group = new QActionGroup(this);
                    previousWasSeparator = false;
                } else {
                    group = nullptr;
                    auto separator = new QAction(this);
                    separator->setSeparator(true);
                    addAction(separator);
                    m_toolBox->addLeftSideAction(separator);
                    previousWasSeparator = true;
                }
            }
        }
    };
    addActionsToToolBox(view->leftActions(), true);
    addActionsToToolBox(view->rightActions(), false);

    // Onboarding label contains instructions for new users how to get 3D content into the project
    m_onboardingLabel = new QLabel(this);
    QString labelText =
                "No 3D import here yet!<br><br>"
                "To create a 3D View you need to add the QtQuick3D import to your file.<br>"
                "You can add the import via the QML Imports tab of the Library view, or alternatively click"
                " <a href=\"#add_import\"><span style=\"text-decoration:none;color:%1\">here</span></a> "
                "to add it straight away.<br><br>"
                "If you want to import 3D assets from another tool, click on the \"Add New Assets...\" button in the Assets tab of the Library view.";
    m_onboardingLabel->setText(labelText.arg(Utils::creatorTheme()->color(Utils::Theme::TextColorLink).name()));
    m_onboardingLabel->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
    connect(m_onboardingLabel, &QLabel::linkActivated, this, &Edit3DWidget::linkActivated);
    fillLayout->addWidget(m_onboardingLabel.data());

    // Canvas is used to render the actual edit 3d view
    m_canvas = new Edit3DCanvas(this);
    fillLayout->addWidget(m_canvas.data());
    showCanvas(false);
}

void Edit3DWidget::contextHelp(const Core::IContext::HelpCallback &callback) const
{
    if (m_view)
        m_view->contextHelp(callback);

    callback({});
}

void Edit3DWidget::showCanvas(bool show)
{
    if (!show) {
        QImage emptyImage;
        m_canvas->updateRenderImage(emptyImage);
    }
    m_canvas->setVisible(show);
    m_onboardingLabel->setVisible(!show);
}

void Edit3DWidget::linkActivated(const QString &link)
{
    Q_UNUSED(link)
    if (m_view)
        m_view->addQuick3DImport();
}

Edit3DCanvas *Edit3DWidget::canvas() const
{
    return m_canvas.data();
}

Edit3DView *Edit3DWidget::view() const
{
    return m_view.data();
}

}
