/***************************************************************************
 *   Copyright (c) 2011 Juergen Riegel <FreeCAD@juergen-riegel.net>        *
 *                                                                         *
 *   This file is part of the FreeCAD CAx development system.              *
 *                                                                         *
 *   This library is free software; you can redistribute it and/or         *
 *   modify it under the terms of the GNU Library General Public           *
 *   License as published by the Free Software Foundation; either          *
 *   version 2 of the License, or (at your option) any later version.      *
 *                                                                         *
 *   This library  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 Library General Public License for more details.                  *
 *                                                                         *
 *   You should have received a copy of the GNU Library General Public     *
 *   License along with this library; see the file COPYING.LIB. If not,    *
 *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
 *   Suite 330, Boston, MA  02111-1307, USA                                *
 *                                                                         *
 ***************************************************************************/


#include <QAction>
#include <QListWidget>
#include <QMessageBox>


#include <Base/Interpreter.h>
#include <Base/Converter.h>
#include <App/Document.h>
#include <App/DocumentObject.h>
#include <Gui/Selection/Selection.h>
#include <Gui/ViewProvider.h>
#include <Mod/PartDesign/App/FeatureFillet.h>
#include <Mod/Part/App/Attacher.h>
#include <Mod/Part/App/Geometry.h>
#include <Mod/Part/App/Tools.h>
#include <Mod/Part/App/GizmoHelper.h>

#include "ui_TaskFilletParameters.h"
#include "TaskFilletParameters.h"


using namespace PartDesignGui;
using namespace Gui;

/* TRANSLATOR PartDesignGui::TaskFilletParameters */

TaskFilletParameters::TaskFilletParameters(ViewProviderDressUp* DressUpView, QWidget* parent)
    : TaskDressUpParameters(DressUpView, true, true, parent)
    , ui(new Ui_TaskFilletParameters)
{
    // we need a separate container widget to add all controls to
    proxy = new QWidget(this);
    ui->setupUi(proxy);
    this->groupLayout()->addWidget(proxy);

    PartDesign::Fillet* pcFillet = DressUpView->getObject<PartDesign::Fillet>();
    bool useAllEdges = pcFillet->UseAllEdges.getValue();
    ui->checkBoxUseAllEdges->setChecked(useAllEdges);
    ui->buttonRefSel->setEnabled(!useAllEdges);
    ui->listWidgetReferences->setEnabled(!useAllEdges);
    double r = pcFillet->Radius.getValue();

    ui->filletRadius->setUnit(Base::Unit::Length);
    ui->filletRadius->setValue(r);
    ui->filletRadius->setMinimum(0);
    ui->filletRadius->selectNumber();
    ui->filletRadius->bind(pcFillet->Radius);
    QMetaObject::invokeMethod(ui->filletRadius, "setFocus", Qt::QueuedConnection);
    std::vector<std::string> strings = pcFillet->Base.getSubValues();
    for (const auto& string : strings) {
        ui->listWidgetReferences->addItem(QString::fromStdString(string));
    }

    QMetaObject::connectSlotsByName(this);

    // clang-format off
    connect(ui->filletRadius, qOverload<double>(&Gui::QuantitySpinBox::valueChanged),
        this, &TaskFilletParameters::onLengthChanged);
    connect(ui->buttonRefSel, &QToolButton::toggled,
        this, &TaskFilletParameters::onButtonRefSel);
    connect(ui->checkBoxUseAllEdges, &QToolButton::toggled,
        this, &TaskFilletParameters::onCheckBoxUseAllEdgesToggled);

    // Create context menu
    createDeleteAction(ui->listWidgetReferences);
    connect(deleteAction, &QAction::triggered, this, &TaskFilletParameters::onRefDeleted);

    createAddAllEdgesAction(ui->listWidgetReferences);
    connect(addAllEdgesAction, &QAction::triggered, this, &TaskFilletParameters::onAddAllEdges);

    connect(ui->listWidgetReferences, &QListWidget::currentItemChanged,
        this, &TaskFilletParameters::setSelection);
    connect(ui->listWidgetReferences, &QListWidget::itemClicked,
        this, &TaskFilletParameters::setSelection);
    connect(ui->listWidgetReferences, &QListWidget::itemDoubleClicked,
        this, &TaskFilletParameters::doubleClicked);
    // clang-format on

    if (strings.empty()) {
        setSelectionMode(refSel);
    }
    else {
        hideOnError();
    }

    setupGizmos(DressUpView);
}

void TaskFilletParameters::onSelectionChanged(const Gui::SelectionChanges& msg)
{
    // executed when the user selected something in the CAD object
    // adds/deletes the selection accordingly

    if (msg.Type == Gui::SelectionChanges::AddSelection) {
        if (selectionMode == refSel) {
            referenceSelected(msg, ui->listWidgetReferences);
        }
    }
    else if (msg.Type == Gui::SelectionChanges::ClrSelection) {
        // TODO: the gizmo position should be only recalculated when the feature associated
        // with the gizmo is removed from the list
        setGizmoPositions();
    }
}

void TaskFilletParameters::onCheckBoxUseAllEdgesToggled(bool checked)
{
    if (auto fillet = getObject<PartDesign::Fillet>()) {
        if (checked) {
            setSelectionMode(none);
        }

        ui->buttonRefSel->setEnabled(!checked);
        ui->listWidgetReferences->setEnabled(!checked);
        fillet->UseAllEdges.setValue(checked);
        fillet->recomputeFeature();
    }
}

void TaskFilletParameters::setButtons(const selectionModes mode)
{
    ui->buttonRefSel->setChecked(mode == refSel);
    ui->buttonRefSel->setText(mode == refSel ? stopSelectionLabel() : startSelectionLabel());
}

void TaskFilletParameters::onRefDeleted()
{
    TaskDressUpParameters::deleteRef(ui->listWidgetReferences);
    setGizmoPositions();
}

void TaskFilletParameters::onAddAllEdges()
{
    TaskDressUpParameters::addAllEdges(ui->listWidgetReferences);
}

void TaskFilletParameters::onLengthChanged(double len)
{
    if (auto fillet = getObject<PartDesign::Fillet>()) {
        setSelectionMode(none);
        setupTransaction();
        fillet->Radius.setValue(len);
        fillet->recomputeFeature();
        // hide the fillet if there was a computation error
        hideOnError();
    }
}

double TaskFilletParameters::getLength() const
{
    return ui->filletRadius->value().getValue();
}

TaskFilletParameters::~TaskFilletParameters()
{
    try {
        Gui::Selection().clearSelection();
        Gui::Selection().rmvSelectionGate();
    }
    catch (const Py::Exception&) {
        Base::PyException e;  // extract the Python error text
        e.reportException();
    }
}

void TaskFilletParameters::changeEvent(QEvent* e)
{
    TaskBox::changeEvent(e);
    if (e->type() == QEvent::LanguageChange) {
        ui->retranslateUi(proxy);
    }
}

void TaskFilletParameters::apply()
{
    ui->filletRadius->apply();

    // Alert user if he created an empty feature
    if (ui->listWidgetReferences->count() == 0) {
        std::string text = tr("Empty fillet created!").toStdString();
        Base::Console().warning("%s\n", text.c_str());
    }
}

void TaskFilletParameters::setupGizmos(ViewProviderDressUp* vp)
{
    if (!GizmoContainer::isEnabled()) {
        return;
    }

    radiusGizmo = new Gui::LinearGizmo(ui->filletRadius);
    radiusGizmo2 = new Gui::LinearGizmo(ui->filletRadius);

    gizmoContainer = GizmoContainer::create({radiusGizmo, radiusGizmo2}, vp);

    setGizmoPositions();
}

void TaskFilletParameters::setGizmoPositions()
{
    if (!gizmoContainer) {
        return;
    }

    auto fillet = getObject<PartDesign::Fillet>();
    if (!fillet || fillet->isError()) {
        gizmoContainer->visible = false;
        return;
    }
    Part::TopoShape baseShape = fillet->getBaseTopoShape(true);
    std::vector<Part::TopoShape> shapes = fillet->getContinuousEdges(baseShape);

    if (shapes.size() == 0) {
        gizmoContainer->visible = false;
        return;
    }
    gizmoContainer->visible = true;

    // Attach the arrow to the first edge
    Part::TopoShape edge = shapes[0];
    auto [face1, face2] = getAdjacentFacesFromEdge(edge, baseShape);

    DraggerPlacementProps props1 = getDraggerPlacementFromEdgeAndFace(edge, face1);
    radiusGizmo->Gizmo::setDraggerPlacement(props1.position, props1.dir);

    DraggerPlacementProps props2 = getDraggerPlacementFromEdgeAndFace(edge, face2);
    radiusGizmo2->Gizmo::setDraggerPlacement(props2.position, props2.dir);

    // The dragger length won't be equal to the radius if the two faces
    // are not orthogonal so this correction is needed
    double angle = props1.dir.GetAngle(props2.dir);
    double correction = 1 / std::tan(angle / 2);

    radiusGizmo->setMultFactor(correction);
    radiusGizmo2->setMultFactor(correction);
}

//**************************************************************************
//**************************************************************************
// TaskDialog
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

TaskDlgFilletParameters::TaskDlgFilletParameters(ViewProviderFillet* DressUpView)
    : TaskDlgDressUpParameters(DressUpView)
{
    parameter = new TaskFilletParameters(DressUpView);

    Content.push_back(parameter);
    Content.push_back(preview);
}

TaskDlgFilletParameters::~TaskDlgFilletParameters() = default;

//==== calls from the TaskView ===============================================================

bool TaskDlgFilletParameters::accept()
{
    auto obj = getObject();
    if (!obj->isError()) {
        getViewObject()->showPreviousFeature(false);
    }

    parameter->apply();

    return TaskDlgDressUpParameters::accept();
}

#include "moc_TaskFilletParameters.cpp"