/*
 * Copyright (c) 2016 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 "shared/view.h"
#include <dali-toolkit/dali-toolkit.h>
#include <dali-toolkit/devel-api/controls/progress-bar/progress-bar.h>

using namespace Dali;
using namespace Dali::Toolkit;
using Dali::Toolkit::ProgressBar;

namespace
{

const char* const BACKGROUND_IMAGE = DEMO_IMAGE_DIR "background-gradient.jpg";
const char* const TOOLBAR_IMAGE = DEMO_IMAGE_DIR "top-bar.png";
const char* const TOOLBAR_TITLE = "Progress Bar";

const Vector4 BACKGROUND_COLOUR( 1.0f, 1.0f, 1.0f, 0.15f );

// Layout sizes
const int MARGIN_SIZE = 10;
const int TOP_MARGIN = 85;

}  // namespace

/** This example shows how to create and use PROGRESS BAR.
 */

class ProgressBarExample: public ConnectionTracker
{
public:

  ProgressBarExample( Application& application )
    : mApplication( application )
  {
    // Connect to the Application's Init signal
    mProgressValue = 0.0f;
    mApplication.InitSignal().Connect( this, &ProgressBarExample::Create );
  }

  ~ProgressBarExample()
  {
    // Nothing to do here
  }

  void Create( Application& application )
  {
    // The Init signal is received once (only) during the Application lifetime

    // Respond to key events
    Stage::GetCurrent().KeyEventSignal().Connect( this, &ProgressBarExample::OnKeyEvent );

    // Creates a default view with a default tool bar.
    // The view is added to the stage.

    mContentLayer = DemoHelper::CreateView( application,
                                            mView,
                                            mToolBar,
                                            BACKGROUND_IMAGE,
                                            TOOLBAR_IMAGE,
                                            TOOLBAR_TITLE );

    mProgressBar = ProgressBar::New();
    mProgressBar.SetParentOrigin(ParentOrigin::TOP_CENTER);
    mProgressBar.SetAnchorPoint(AnchorPoint::TOP_CENTER);
    mProgressBar.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH);
    mProgressBar.SetResizePolicy(ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT);

    Toolkit::TableView contentTable = Toolkit::TableView::New(2, 1);
    contentTable.SetResizePolicy(ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH);
    contentTable.SetResizePolicy(ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT);
    contentTable.SetAnchorPoint(AnchorPoint::TOP_LEFT);
    contentTable.SetParentOrigin(ParentOrigin::TOP_LEFT);
    contentTable.SetCellPadding(Size(MARGIN_SIZE, MARGIN_SIZE * 0.5f));

    for( unsigned int i = 0; i < contentTable.GetRows(); ++i )
    {
      contentTable.SetFitHeight( i );
    }

    contentTable.SetPosition( 0.0f, TOP_MARGIN );
    mContentLayer.Add( contentTable );

    // Image selector for progress bar
    Toolkit::TableView progressBackground = Toolkit::TableView::New( 1, 1 );
    progressBackground.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
    progressBackground.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
    progressBackground.SetBackgroundColor( BACKGROUND_COLOUR );
    progressBackground.SetCellPadding( Size( MARGIN_SIZE, MARGIN_SIZE ) );
    progressBackground.SetRelativeWidth( 0, 1.0f );
    progressBackground.SetFitHeight( 0 );
    contentTable.Add( progressBackground );
    progressBackground.Add( mProgressBar );

    // Create buttons
    Toolkit::TableView buttonBackground = Toolkit::TableView::New( 2, 1 );
    buttonBackground.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
    buttonBackground.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
    buttonBackground.SetBackgroundColor( BACKGROUND_COLOUR );
    buttonBackground.SetCellPadding( Size( MARGIN_SIZE, MARGIN_SIZE ) );

    for( unsigned int i = 0; i < buttonBackground.GetRows(); ++i )
    {
      buttonBackground.SetFitHeight( i );
    }

    contentTable.Add( buttonBackground );

    mSetProgressButton = Toolkit::PushButton::New();
    mSetProgressButton.SetLabelText( "Set Progress" );
    mSetProgressButton.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
    mSetProgressButton.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
    mSetProgressButton.ClickedSignal().Connect( this, &ProgressBarExample::OnSetProgressButtonSelected );

    buttonBackground.Add( mSetProgressButton );

    mResetProgressButton = Toolkit::PushButton::New();
    mResetProgressButton.SetLabelText( "Reset Progress" );
    mResetProgressButton.SetResizePolicy( ResizePolicy::FILL_TO_PARENT, Dimension::WIDTH );
    mResetProgressButton.SetResizePolicy( ResizePolicy::USE_NATURAL_SIZE, Dimension::HEIGHT );
    mResetProgressButton.ClickedSignal().Connect( this, &ProgressBarExample::OnResetProgressButtonSelected );

    buttonBackground.Add( mResetProgressButton );
 }

 bool OnResetProgressButtonSelected( Toolkit::Button button )
 {
   mProgressValue = 0.0f;
   mProgressBar.SetProperty(ProgressBar::Property::PROGRESS_VALUE, 0.0f);
   return true;
 }

 bool OnSetProgressButtonSelected( Toolkit::Button button )
 {
   mProgressValue += 0.1f;
   mProgressBar.SetProperty(ProgressBar::Property::PROGRESS_VALUE, mProgressValue);
   return true;
 }

 void OnKeyEvent( const KeyEvent& event )
 {
   if( event.state == KeyEvent::Down )
   {
     if( IsKey( event, Dali::DALI_KEY_ESCAPE ) || IsKey( event, Dali::DALI_KEY_BACK ) )
     {
       // Exit application when click back or escape.
       mApplication.Quit();
     }
   }
 }

private:

  Application&      mApplication;
  Toolkit::Control  mView;                              ///< The View instance.
  Toolkit::ToolBar  mToolBar;                           ///< The View's Toolbar.
  Layer             mContentLayer;                      ///< Content layer.
  ProgressBar       mProgressBar;
  Toolkit::PushButton mSetProgressButton;
  Toolkit::PushButton mResetProgressButton;
  float mProgressValue;
};

void RunTest( Application& application )
{
  ProgressBarExample test( application );
  application.MainLoop();
}

// Entry point for Linux & Tizen applications
int DALI_EXPORT_API main( int argc, char **argv )
{
  Application application = Application::New( &argc, &argv, DEMO_THEME_PATH );

  RunTest( application );

  return 0;
}