/**
  * @RDE_HEADER@
  * Declaration/Definition
  * $Id$
  * $HeadURL$
  * $Author$
  */
// [WriteFile Name=ViewshedLocation, Category=Analysis]
// [Legal]
// Copyright 2017 Esri.

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0

// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

#include "ViewshedLocation.h"

#include "ArcGISTiledElevationSource.h"
#include "Scene.h"
#include "SceneGraphicsView.h"
#include "LocationViewshed.h"
#include "Camera.h"
#include "Point.h"
#include "AnalysisOverlay.h"

#include "QColor"


using namespace Esri::ArcGISRuntime;

ViewshedLocation::ViewshedLocation(QObject* parent /* = nullptr */):
  QObject(parent)
{
}

void ViewshedLocation::init(Esri::ArcGISRuntime::SceneGraphicsView* sceneView)
{
  m_sceneView = sceneView;

  // Register classes for QML
//  qmlRegisterType<SceneQuickView>("Esri.Samples", 1, 0, "SceneView");
//  qmlRegisterType<ViewshedLocation>("Esri.Samples", 1, 0, "ViewshedLocationSample");


  Surface* surface = new Surface(this);
  surface->elevationSources()->append(
        new ArcGISTiledElevationSource(
          QUrl(QStringLiteral("http://elevation3d.arcgis.com/arcgis/rest/services/WorldElevation3D/Terrain3D/ImageServer")),
          this));
  m_sceneView->arcGISScene()->setBaseSurface(surface);

  // set initial viewpoint
  setInitialViewpoint();

  // connect signals
  connectSignals();
}


void ViewshedLocation::setInitialViewpoint()
{
  // Set a viewpoint
  double x = 6.86088;
  double y = 45.3604;
  double z = 3582.55;
  Point point(x, y, z, SpatialReference(4326));
  double heading = 345;
  double pitch = 70;
  double roll = 0;
  Camera camera(point, heading, pitch, roll);
  m_sceneView->setViewpointCamera(camera);
}

void ViewshedLocation::connectSignals()
{
  // on mouse click perform the location viewshed
  connect(m_sceneView, &SceneGraphicsView::mouseClicked, this, [this](QMouseEvent& event)
  {
    if (!m_locationViewshed[0])
      createViewshed(event.x(), event.y());
    else
    {
      for (int i = 0; i < 3; ++i)
      {
        const Point pt = m_sceneView->screenToBaseSurface(event.x(), event.y());
        m_locationViewshed[i]->setLocation(pt);
      }
    }
  });

  connect(m_sceneView, &SceneGraphicsView::mousePressedAndHeld, this, [this](QMouseEvent& event)
  {
    if (!m_locationViewshed[0])
      createViewshed(event.x(), event.y());

    m_calculating = true;
  });

  connect(m_sceneView, &SceneGraphicsView::mouseMoved, this, [this](QMouseEvent& event)
  {
    if (m_calculating)
    {
      for (int i = 0; i < 3; ++i)
      {
        const Point pt = m_sceneView->screenToBaseSurface(event.x(), event.y());
        m_locationViewshed[i]->setLocation(pt);
      }
    }
  });

  connect(m_sceneView, &SceneGraphicsView::mouseReleased, this, [this](QMouseEvent)
  {
    m_calculating = false;
  });
}

void ViewshedLocation::createViewshed(double x, double y)
{

  m_analysisOverlay = new AnalysisOverlay(this);
  m_sceneView->analysisOverlays()->append(m_analysisOverlay);


  const Point pt = m_sceneView->screenToBaseSurface(x, y);

  qCritical() << " pt=";
  qCritical() << " pt=" << pt.x();
  qCritical() << " pt=" << pt.y();
  qCritical() << " pt=" << pt.z();

  for (int i = 0; i < 3; ++i)
  {
    double heading = i * 120.0;
    m_locationViewshed[i] = new LocationViewshed(pt
      , heading
      , 90.0   // pitch
      , 120.0  // horizontalAngle
      , 90.0   // verticalAngle
      , 10.0  // minDistance
      , 20000
      , this);


    m_locationViewshed[i]->setVisible(m_viewshedVisible);

    // Add the Viewshed to the Analysis Overlay
    m_analysisOverlay->analyses()->append(m_locationViewshed[i]);

    m_locationViewshed[i]->setFrustumOutlineVisible(true);

    // QColor frustumColor(0, 0, 0, 255);
    // m_locationViewshed->setFrustumOutlineColor(frustumColor);
  }
  return;
}

// Getters/Setters for each Q_PROPERTY
bool ViewshedLocation::isViewshedVisible() const
{
  return m_viewshedVisible;
}

void ViewshedLocation::setViewshedVisible(bool viewshedVisible)
{
  for (int i = 0; i < 3; ++i)
  {
    if (m_locationViewshed[i])
    {
      if (m_locationViewshed[i]->isVisible() == viewshedVisible)
      {
        continue;
      }
      
      m_locationViewshed[i]->setVisible(viewshedVisible);
    }
  }

  if (m_viewshedVisible != viewshedVisible)
  {
    m_viewshedVisible = viewshedVisible;

    emit viewshedVisibleChanged();
  }
}

bool ViewshedLocation::isFrustumOutlineVisible() const
{
  return m_locationViewshed[0] ? m_locationViewshed[0]->isFrustumOutlineVisible() : m_frustumVisible;
}

void ViewshedLocation::setFrustumOutlineVisible(bool frustumVisible)
{
  for (int i = 0; i < 3; ++i)
  {
    if (m_locationViewshed[i])
    {
      if (m_locationViewshed[i]->isFrustumOutlineVisible() == frustumVisible)
      {
        continue;
      }

      m_frustumVisible = frustumVisible;
      m_locationViewshed[i]->setFrustumOutlineVisible(frustumVisible);
    }
  }

  if (m_frustumVisible != frustumVisible)
  {
    m_frustumVisible = frustumVisible;
    emit frustumVisibleChanged();
  }
}

double ViewshedLocation::minDistance() const
{
  return m_locationViewshed[0] ? m_locationViewshed[0]->minDistance() : m_minDistance;
}

void ViewshedLocation::setMinDistance(double minDistance)
{
  for (int i = 0; i < 3; ++i)
  {
    if (m_locationViewshed[i])
    {
      if (m_locationViewshed[i]->minDistance() == minDistance)
      {
        continue;
      }
      m_locationViewshed[i]->setMinDistance(minDistance);
    }
  }

  if (m_minDistance != minDistance)
  {
    m_minDistance = minDistance;
    emit minDistanceChanged();
  }
}

double ViewshedLocation::maxDistance() const
{
  return m_locationViewshed[0] ? m_locationViewshed[0]->maxDistance() : m_maxDistance;
}

void ViewshedLocation::setMaxDistance(double maxDistance)
{
  for (int i = 0; i < 3; ++i)
  {
    if (m_locationViewshed[i])
    {
      if (m_locationViewshed[i]->maxDistance() == maxDistance)
      {
        continue;
      }
      m_locationViewshed[i]->setMaxDistance(maxDistance);
    }
  }

  if (m_maxDistance != maxDistance)
  {
    m_maxDistance = maxDistance;
    emit maxDistanceChanged();
  }
}