/*
 * Copyright (c) 2018 Samsung Electronics Co., Ltd.
 *
 * 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.
 *
 */

#include <string>
#include "linear-example.h"
#include <dali-toolkit/devel-api/visuals/image-visual-properties-devel.h>
#include <dali-toolkit/devel-api/visual-factory/visual-factory.h>
#include <dali-toolkit/devel-api/controls/control-devel.h>
#include <dali-toolkit/devel-api/layouting/linear-layout.h>

using namespace Dali;
using namespace Dali::Toolkit;

namespace
{
const char* const TITLE = "Linear Example";

// Button file names
const char* LTR_IMAGE( DEMO_IMAGE_DIR "icon-play.png" );
const char* LTR_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-play-selected.png" );

const char* RTL_IMAGE( DEMO_IMAGE_DIR "icon-reverse.png" );
const char* RTL_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-reverse-selected.png" );

const char* ROTATE_CLOCKWISE_IMAGE( DEMO_IMAGE_DIR "icon-reset.png" );
const char* ROTATE_CLOCKWISE_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-reset-selected.png" );

const char* ALIGN_IMAGE( DEMO_IMAGE_DIR "icon-replace.png" );
const char* ALIGN_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-replace-selected.png" );

const char* WEIGHT_IMAGE( DEMO_IMAGE_DIR "icon-item-view-layout-grid.png" );
const char* WEIGHT_SELECTED_IMAGE( DEMO_IMAGE_DIR "icon-item-view-layout-grid-selected.png" );

// Child image filenames
const char* IMAGE_PATH[] = {
  DEMO_IMAGE_DIR "application-icon-101.png",
  DEMO_IMAGE_DIR "application-icon-102.png",
  DEMO_IMAGE_DIR "application-icon-103.png",
  DEMO_IMAGE_DIR "application-icon-104.png"
};

const unsigned int NUMBER_OF_RESOURCES = sizeof(IMAGE_PATH) / sizeof(char*);

// Helper function to create ImageViews with given filename and size.
void CreateChildImageView( ImageView& imageView, const char* filename, Size size )
{
  imageView = ImageView::New();
  Property::Map imagePropertyMap;
  imagePropertyMap[ Toolkit::Visual::Property::TYPE ] = Toolkit::Visual::IMAGE;
  imagePropertyMap[ Toolkit::ImageVisual::Property::URL ] = filename;
  imagePropertyMap[ ImageVisual::Property::DESIRED_WIDTH ] = size.width;
  imagePropertyMap[ ImageVisual::Property::DESIRED_HEIGHT ] = size.height;
  imageView.SetProperty( Toolkit::ImageView::Property::IMAGE, imagePropertyMap );
  imageView.SetName( "ImageView" );
  imageView.SetAnchorPoint( AnchorPoint::TOP_LEFT );
  imageView.SetResizePolicy( ResizePolicy::FIXED, Dimension::ALL_DIMENSIONS );
}

}  // namespace

namespace Demo
{

LinearExample::LinearExample()
: Example( TITLE ),
  mLTRDirection(true),
  mImagesWeighted (false )
{
}

void LinearExample::Create()
{
  auto stage = Stage::GetCurrent();

  mDirectionButton = PushButton::New();
  mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, RTL_IMAGE );
  mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, RTL_SELECTED_IMAGE );
  mDirectionButton.ClickedSignal().Connect( this, &LinearExample::OnDirectionClicked );
  mDirectionButton.SetParentOrigin( Vector3( 0.2f, 1.0f, 0.5f ) );
  mDirectionButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
  mDirectionButton.SetSize( 75, 75 );
  stage.Add( mDirectionButton );

  mAlignmentButton = PushButton::New();
  mAlignmentButton.SetProperty( PushButton::Property::UNSELECTED_ICON, ALIGN_IMAGE );
  mAlignmentButton.SetProperty( PushButton::Property::SELECTED_ICON, ALIGN_SELECTED_IMAGE );
  mAlignmentButton.ClickedSignal().Connect( this, &LinearExample::OnAlignmentClicked );
  mAlignmentButton.SetParentOrigin( Vector3( 0.4f, 1.0f, 0.5f ) );
  mAlignmentButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
  mAlignmentButton.SetSize( 75, 75 );
  stage.Add( mAlignmentButton );

  mWeightButton = Toolkit::PushButton::New();
  mWeightButton.SetProperty( PushButton::Property::UNSELECTED_ICON, WEIGHT_IMAGE );
  mWeightButton.SetProperty( PushButton::Property::SELECTED_ICON, WEIGHT_SELECTED_IMAGE );
  mWeightButton.ClickedSignal().Connect( this, &LinearExample::OnWeightClicked );
  mWeightButton.SetParentOrigin( Vector3( 0.6f, 1.0f, 0.5f ) );
  mWeightButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
  mWeightButton.SetSize( 75, 75 );
  stage.Add( mWeightButton );

  mRotateButton = PushButton::New();
  mRotateButton.SetProperty( PushButton::Property::UNSELECTED_ICON, ROTATE_CLOCKWISE_IMAGE );
  mRotateButton.SetProperty( PushButton::Property::SELECTED_ICON, ROTATE_CLOCKWISE_SELECTED_IMAGE );
  mRotateButton.ClickedSignal().Connect( this, &LinearExample::OnRotateClicked );
  mRotateButton.SetParentOrigin( Vector3( 0.8f, 1.0f, 0.5f ) );
  mRotateButton.SetAnchorPoint( AnchorPoint::BOTTOM_CENTER );
  mRotateButton.SetSize( 75, 75 );
  stage.Add( mRotateButton );

  // Create a linear layout
  mLinearContainer = Control::New();
  auto layout = LinearLayout::New();
  layout.SetAnimateLayout(true);
  layout.SetOrientation( LinearLayout::Orientation::HORIZONTAL );
  layout.SetAlignment( LinearLayout::Alignment::CENTER_VERTICAL );
  DevelControl::SetLayout( mLinearContainer, layout );

  mLinearContainer.SetParentOrigin( ParentOrigin::CENTER );
  mLinearContainer.SetAnchorPoint( AnchorPoint::CENTER );
  mLinearContainer.SetName( "LinearExample" );
  stage.Add( mLinearContainer );
  mLinearContainer.SetProperty( Toolkit::LayoutItem::ChildProperty::WIDTH_SPECIFICATION, ChildLayoutData::MATCH_PARENT );
  mLinearContainer.SetProperty( Toolkit::LayoutItem::ChildProperty::HEIGHT_SPECIFICATION, ChildLayoutData::MATCH_PARENT );
  mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::LEFT_TO_RIGHT );

  for( unsigned int x = 0; x < NUMBER_OF_RESOURCES; ++x )
  {
    Toolkit::ImageView imageView;
    CreateChildImageView( imageView, IMAGE_PATH[ x ], Size( 100.0f, 100.0f ) );
    mLinearContainer.Add( imageView );
    mImages.push_back( imageView );
  }
}

// Remove controls added by this example from stage
void LinearExample::Remove()
{
  if ( mLinearContainer )
  {
    UnparentAndReset( mDirectionButton );
    UnparentAndReset( mAlignmentButton );
    UnparentAndReset( mWeightButton );
    UnparentAndReset( mRotateButton );
    UnparentAndReset( mLinearContainer);
  }
}

// Mirror items in layout
bool LinearExample::OnDirectionClicked( Button button )
{
  auto layout = LinearLayout::DownCast( DevelControl::GetLayout( mLinearContainer ) );
  layout.SetOrientation( LinearLayout::Orientation::HORIZONTAL );
  if( !mLTRDirection )
  {
    mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, LTR_IMAGE );
    mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, LTR_SELECTED_IMAGE );
    mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::LEFT_TO_RIGHT );
  }
  else
  {
    mDirectionButton.SetProperty( PushButton::Property::UNSELECTED_ICON, RTL_IMAGE );
    mDirectionButton.SetProperty( PushButton::Property::SELECTED_ICON, RTL_SELECTED_IMAGE );
    mLinearContainer.SetProperty( Actor::Property::LAYOUT_DIRECTION, LayoutDirection::RIGHT_TO_LEFT );
  }
  mLTRDirection = !mLTRDirection;
  return true;
}

// Rotate layout by changing layout
bool LinearExample::OnRotateClicked( Button button )
{
  auto layout = LinearLayout::DownCast( DevelControl::GetLayout( mLinearContainer ) );
  if( layout.GetOrientation() == LinearLayout::Orientation::VERTICAL )
  {
    layout.SetOrientation( LinearLayout::Orientation::HORIZONTAL );
    layout.SetAlignment(LinearLayout::Alignment::CENTER_VERTICAL );
  }
  else
  {
    layout.SetOrientation( LinearLayout::Orientation::VERTICAL );
    layout.SetAlignment( LinearLayout::Alignment::CENTER_HORIZONTAL );
  }
  return true;
}

bool LinearExample::OnAlignmentClicked( Button button )
{
  auto layout = LinearLayout::DownCast( DevelControl::GetLayout( mLinearContainer ) );
  if ( layout.GetAlignment() == LinearLayout::Alignment::CENTER_VERTICAL ) {
    layout.SetAlignment( LinearLayout::Alignment::BEGIN );
  }
  else if ( layout.GetAlignment() == LinearLayout::Alignment::BEGIN )
  {
    layout.SetAlignment( LinearLayout::Alignment::END );
  }
  else if ( layout.GetAlignment() == LinearLayout::Alignment::END )
  {
    layout.SetAlignment( LinearLayout::Alignment::CENTER_HORIZONTAL);
  }
  else if ( layout.GetAlignment() == LinearLayout::Alignment::CENTER_HORIZONTAL )
  {
    layout.SetAlignment( LinearLayout::Alignment::TOP );
  }
  else if ( layout.GetAlignment() == LinearLayout::Alignment::TOP )
  {
    layout.SetAlignment( LinearLayout::Alignment::BOTTOM );
  }
  else if ( layout.GetAlignment() == LinearLayout::Alignment::BOTTOM )
  {
    layout.SetAlignment( LinearLayout::Alignment::CENTER_VERTICAL );
  }
  return true;
}

bool LinearExample::OnWeightClicked( Button button )
{
  if( !mImagesWeighted )
  {
    for( auto&& iter : mImages )
    {
      iter.SetProperty( Toolkit::LinearLayout::ChildProperty::WEIGHT, 0.25f );
    }
  }
  else
  {
    for( auto&& iter : mImages )
    {
      iter.SetProperty( Toolkit::LinearLayout::ChildProperty::WEIGHT, 0.0f );
    }
  }

  mImagesWeighted = !mImagesWeighted;
  return true;
}

} // namespace Demo