/* Copyright (c) 2012, STANISLAW ADASZEWSKI
   All rights reserved.

   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions are met:
   * Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright
   notice, this list of conditions and the following disclaimer in the
   documentation and/or other materials provided with the distribution.
   * Neither the name of STANISLAW ADASZEWSKI nor the
   names of its contributors may be used to endorse or promote products
   derived from this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   DISCLAIMED. IN NO EVENT SHALL STANISLAW ADASZEWSKI BE LIABLE FOR ANY
   DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include "QNodesEditor.h"

#include <QGraphicsScene>
#include <QEvent>
#include <QGraphicsSceneContextMenuEvent>
#include <QGraphicsSceneDragDropEvent>
#include <QGraphicsSceneHelpEvent>
#include <QGraphicsSceneHoverEvent>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsSceneMoveEvent>
#include <QGraphicsSceneResizeEvent>
#include <QGraphicsSceneWheelEvent>

#include "QNEPort.h"
#include "QNEConnection.h"
#include "QNEBlock.h"

// -------------------------------------------------------------------------
PipelineEditor::QNodesEditor::
QNodesEditor( QObject* parent )
 : Superclass( parent ),
   m_Conn( NULL ),
   m_Workspace( NULL )
{
}

// -------------------------------------------------------------------------
PipelineEditor::QNodesEditor::
~QNodesEditor( )
{
}

// -------------------------------------------------------------------------
PipelineEditor::QNodesEditor::
TWorkspace* PipelineEditor::QNodesEditor::
workspace( )
{
  return( this->m_Workspace );
}

// -------------------------------------------------------------------------
const PipelineEditor::QNodesEditor::
TWorkspace* PipelineEditor::QNodesEditor::
workspace( ) const
{
  return( this->m_Workspace );
}

// -------------------------------------------------------------------------
void PipelineEditor::QNodesEditor::
setWorkspace( TWorkspace* ws )
{
  if( this->m_Workspace == ws )
    return;
  this->m_Workspace = ws;
  this->m_Graph = TGraph::New( );

  /* TODO
     QGraphicsScene* scene = this->scene( );
     // Add vertices and keep track of ports
     std::map< std::string, std::map< std::string, QNEPort* > >
     in_ports, out_ports;
     auto vIt = this->m_Workspace->GetGraph( )->BeginVertices( );
     auto vIt_end = this->m_Workspace->GetGraph( )->EndVertices( );
     for( ; vIt != vIt_end; ++vIt )
     {
     this->_createBlock( dynamic_cast< TFilter* >( vIt->second.GetPointer( ) ) );

     } // rof
  */

  // Add edges
  /* TODO
     auto rIt = this->m_Workspace->GetGraph( )->BeginEdgesRows( );
     auto rIt_end = this->m_Workspace->GetGraph( )->EndEdgesRows( );
     for( ; rIt != rIt_end; ++rIt )
     {
     auto cIt = rIt->second.begin( );
     for( ; cIt != rIt->second.end( ); ++cIt )
     {
     auto eIt = cIt->second.begin( );
     for( ; eIt != cIt->second.end( ); ++eIt )
     {
     QNEPort* p1 = out_ports[ rIt->first ][ eIt->first ];
     QNEPort* p2 = in_ports[ cIt->first ][ eIt->second ];
     if( p1 != NULL && p2 != NULL )
     {
     QNEConnection* conn = new QNEConnection( 0, scene );
     conn->setPort1( p1 );
     conn->setPort2( p2 );
     this->m_Graph->AddConnection( rIt->first, cIt->first, conn );

     } // fi

     } // rof

     } // rof

     } // rof
  */
}

// -------------------------------------------------------------------------
std::string PipelineEditor::QNodesEditor::
createFilter( const std::string& filter, const QPointF& pnt )
{
  std::string name = filter;
  while( this->m_Workspace->HasFilter( name ) )
    name += std::string( "_" );
  if( this->m_Workspace->CreateFilter( filter, name ) )
  {
    this->_CreateBlock( this->m_Workspace->GetFilter( name ), pnt );
    return( name );
  }
  else
    return( "" );
}

// -------------------------------------------------------------------------
void PipelineEditor::QNodesEditor::
install( QGraphicsScene* s )
{
  s->installEventFilter( this );
  this->m_Scene = s;
}

// -------------------------------------------------------------------------
QGraphicsItem* PipelineEditor::QNodesEditor::
itemAt( const QPointF& pos )
{
  QList< QGraphicsItem* > items =
    this->m_Scene->items( QRectF( pos - QPointF( 1, 1 ), QSize( 3, 3 ) ) );

  foreach( QGraphicsItem* item, items )
    if( item->type( ) > QGraphicsItem::UserType )
      return( item );
  return( NULL );
}

#include <iostream>

// -------------------------------------------------------------------------
void PipelineEditor::QNodesEditor::
_CreateBlock( TFilter* f, const QPointF& pnt )
{
  if( f == NULL )
    return;

  // Add block
  QNEBlock* b = new QNEBlock( 0, this->m_Scene );
  b->setNamePort( f->GetName( ) );
  b->setTypePort( f->GetClassName( ).c_str( ) );
  // TODO: b->setScenePos( pnt );

  // Add input ports
  std::set< std::string > inputs;
  f->GetInputsNames( inputs );
  for( auto iIt = inputs.begin( ); iIt != inputs.end( ); ++iIt )
    b->addInputPort( iIt->c_str( ) );

  // Add output ports
  std::set< std::string > outputs;
  f->GetOutputsNames( outputs );
  for( auto oIt = outputs.begin( ); oIt != outputs.end( ); ++oIt )
    b->addOutputPort( oIt->c_str( ) );

  // Keep a trace of this visual graph
  this->m_Graph->InsertVertex( f->GetName( ), b );
}

// -------------------------------------------------------------------------
void PipelineEditor::QNodesEditor::
_DoubleClick( QGraphicsSceneMouseEvent* evt, QGraphicsItem* item )
{
  switch( evt->button( ) )
  {
  case Qt::LeftButton:
  {
    QNEBlock* block = dynamic_cast< QNEBlock* >( item );
    QNEPort* port = dynamic_cast< QNEPort* >( item );
    QNEConnection* conn = dynamic_cast< QNEConnection* >( item );

    if( block != NULL )
    {
      /* TODO
         auto ports = block->ports( );
         std::string name = "";
         for(
         auto pIt = ports.begin( );
         pIt != ports.end( ) && name == "";
         ++pIt
         )
         if(
         ( *pIt )->portFlags( ) && QNEPort::NamePort == QNEPort::NamePort
         )
         name = ( *pIt )->portName( ).toStdString( );
         if( name == "" )
         return;
         TFilter* filter = this->m_Workspace->GetFilter( name );
         if( filter != NULL )
         {
         } // fi
      */
    }
    else if( port != NULL )
    {
    }
    else if( conn != NULL )
    {
    } // fi
  }
  break;
  /* TODO:
     case Qt::RightButton:
     {
     }
     break;
     case Qt::MiddleButton:
     {
     }
     break;
  */
  default:
    break;
  } // hctiws
}

// -------------------------------------------------------------------------
bool PipelineEditor::QNodesEditor::
eventFilter( QObject* o, QEvent* e )
{
  // Event type
  switch( int( e->type( ) ) )
  {
  case QEvent::GraphicsSceneContextMenu:
  {
    QGraphicsSceneContextMenuEvent* evt =
      dynamic_cast< QGraphicsSceneContextMenuEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneDragEnter:
  {
    QGraphicsSceneDragDropEvent* evt =
      dynamic_cast< QGraphicsSceneDragDropEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneDragLeave:
  {
    QGraphicsSceneDragDropEvent* evt =
      dynamic_cast< QGraphicsSceneDragDropEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneDragMove:
  {
    QGraphicsSceneDragDropEvent* evt =
      dynamic_cast< QGraphicsSceneDragDropEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneDrop:
  {
    QGraphicsSceneDragDropEvent* evt =
      dynamic_cast< QGraphicsSceneDragDropEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneHelp:
  {
    QGraphicsSceneHelpEvent* evt =
      dynamic_cast< QGraphicsSceneHelpEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneHoverEnter:
  {
    QGraphicsSceneHoverEvent* evt =
      dynamic_cast< QGraphicsSceneHoverEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneHoverLeave:
  {
    QGraphicsSceneHoverEvent* evt =
      dynamic_cast< QGraphicsSceneHoverEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneHoverMove:
  {
    QGraphicsSceneHoverEvent* evt =
      dynamic_cast< QGraphicsSceneHoverEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneMouseDoubleClick:
  {
    QGraphicsSceneMouseEvent* evt =
      dynamic_cast< QGraphicsSceneMouseEvent* >( e );
    if( evt != NULL )
    {
      QGraphicsItem* item = this->itemAt( evt->scenePos( ) );
      if( item != NULL )
      {
        this->_DoubleClick( evt, item );
        return( true );

      } // fi

    } // fi
  }
  break;
  case QEvent::GraphicsSceneMouseMove:
  {
    QGraphicsSceneMouseEvent* evt =
      dynamic_cast< QGraphicsSceneMouseEvent* >( e );
    if( evt != NULL )
    {
      if( this->m_Conn )
      {
        this->m_Conn->setPos2( evt->scenePos( ) );
        this->m_Conn->updatePath( );
        return( true );

      } // fi

    } // fi
  }
  break;
  case QEvent::GraphicsSceneMousePress:
  {
    QGraphicsSceneMouseEvent* evt =
      dynamic_cast< QGraphicsSceneMouseEvent* >( e );
    if( evt != NULL )
    {
      switch( evt->button( ) )
      {
      case Qt::LeftButton:
      {
        QNEOutputPort* port =
          dynamic_cast< QNEOutputPort* >( this->itemAt( evt->scenePos( ) ) );
        if( port != NULL )
        {
          this->m_Conn = new QNEConnection( 0, this->m_Scene );
          this->m_Conn->setPort1( port );
          this->m_Conn->setPos1( port->scenePos( ) );
          this->m_Conn->setPos2( evt->scenePos( ) );
          this->m_Conn->updatePath( );
          return( true );

        } // fi
      }
      break;
      default:
        break;

      } // hctiws

    } // fi
  }
  break;
  case QEvent::GraphicsSceneMouseRelease:
  {
    QGraphicsSceneMouseEvent* evt =
      dynamic_cast< QGraphicsSceneMouseEvent* >( e );
    if( evt != NULL )
    {
      if( this->m_Conn != NULL && evt->button( ) == Qt::LeftButton )
      {
        QNEInputPort* port2 =
          dynamic_cast< QNEInputPort* >( this->itemAt( evt->scenePos( ) ) );
        if( port2 != NULL )
        {
          QNEOutputPort* port1 =
            dynamic_cast< QNEOutputPort* >( this->m_Conn->port1( ) );
          if( port1 != NULL )
          {
            if(
              port1->block( ) != port2->block( ) &&
              !port2->hasConnection( ) &&
              !port1->isConnected( port2 )
              )
            {
              this->m_Conn->setPos2( port2->scenePos( ) );
              this->m_Conn->setPort2( port2 );
              this->m_Conn->updatePath( );

              this->m_Workspace->Connect(
                port1->block( )->namePort( )->name( ).toStdString( ),
                port2->block( )->namePort( )->name( ).toStdString( ),
                port1->name( ).toStdString( ),
                port2->name( ).toStdString( )
                );
              this->m_Graph->AddConnection(
                port1->block( )->namePort( )->name( ).toStdString( ),
                port2->block( )->namePort( )->name( ).toStdString( ),
                this->m_Conn
                );

              this->m_Conn = NULL;
              return( true );

            } // fi

          } // fi

        } // fi
        delete this->m_Conn;
        this->m_Conn = NULL;
        return( true );

      } // fi

    } // fi
  }
  break;
  case QEvent::GraphicsSceneMove:
  {
    QGraphicsSceneMoveEvent* evt =
      dynamic_cast< QGraphicsSceneMoveEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneResize:
  {
    QGraphicsSceneResizeEvent* evt =
      dynamic_cast< QGraphicsSceneResizeEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  case QEvent::GraphicsSceneWheel:
  {
    QGraphicsSceneWheelEvent* evt =
      dynamic_cast< QGraphicsSceneWheelEvent* >( e );
    if( evt != NULL )
    {
    } // fi
  }
  break;
  default:
    break;
  } // hctiws

  // Mouse event
  /*
    QGraphicsSceneMouseEvent* me =
    dynamic_cast< QGraphicsSceneMouseEvent* >( e );
    if( me != NULL )
    {
    } // fi
  */

  /* TODO
     switch( ( int ) e->type( ) )
     {
     case QEvent::GraphicsSceneMouseMove:
     {
     if( this->m_Conn )
     {
     this->m_Conn->setPos2( me->scenePos( ) );
     this->m_Conn->updatePath( );
     return( true );
     }
     break;
     }
     case QEvent::GraphicsSceneMouseRelease:
     {
     if( this->m_Conn && me->button( ) == Qt::LeftButton )
     {
     QGraphicsItem* item = itemAt( me->scenePos( ) );
     if( item && item->type( ) == QNEPort::Type )
     {
     QNEPort* port1 = this->m_Conn->port1( );
     QNEPort* port2 = ( QNEPort* ) item;
     if( port1->block( ) != port2->block( ) && port1->isOutput( ) != port2->isOutput( ) && !port1->isConnected( port2 ) )
     {
     this->m_Conn->setPos2( port2->scenePos( ) );
     this->m_Conn->setPort2( port2 );
     this->m_Conn->updatePath( );
     this->m_Conn = NULL;
     return( true );
     }
     }

     delete this->m_Conn;
     this->m_Conn = NULL;
     return( true );
     }
     break;
     }
     } // hctiws
  */

  return( this->Superclass::eventFilter( o, e ) );
}

// eof - $RCSfile$