/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2017 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <functional>
using namespace std::placeholders;

#include "position_relative_tool.h"
#include "pcb_actions.h"
#include "selection_tool.h"
#include "edit_tool.h"
#include "picker_tool.h"

#include <dialogs/dialog_position_relative.h>
#include <status_popup.h>
#include <board_commit.h>
#include <hotkeys.h>
#include <bitmaps.h>
#include <confirm.h>


// Position relative tool actions

TOOL_ACTION PCB_ACTIONS::positionRelative( "pcbnew.PositionRelative.positionRelative",
        AS_GLOBAL, TOOL_ACTION::LegacyHotKey( HK_POSITION_RELATIVE ),
        _( "Position Relative To..." ),
        _( "Positions the selected item(s) by an exact amount relative to another" ),
        move_relative_xpm );


TOOL_ACTION PCB_ACTIONS::selectpositionRelativeItem(
        "pcbnew.PositionRelative.selectpositionRelativeItem",
        AS_GLOBAL, 0, "", "", nullptr );


POSITION_RELATIVE_TOOL::POSITION_RELATIVE_TOOL() :
    PCB_TOOL( "pcbnew.PositionRelative" ),
    m_dialog( NULL ),
    m_selectionTool( NULL ),
    m_anchor_item( NULL )
{
}


void POSITION_RELATIVE_TOOL::Reset( RESET_REASON aReason )
{
    if( aReason != RUN )
        m_commit.reset( new BOARD_COMMIT( this ) );
}


bool POSITION_RELATIVE_TOOL::Init()
{
    // Find the selection tool, so they can cooperate
    m_selectionTool = m_toolMgr->GetTool<SELECTION_TOOL>();

    return m_selectionTool != nullptr;
}


int POSITION_RELATIVE_TOOL::PositionRelative( const TOOL_EVENT& aEvent )
{
    PCB_BASE_FRAME*         editFrame = getEditFrame<PCB_BASE_FRAME>();

    const auto& selection = m_selectionTool->RequestSelection(
            []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector )
            { EditToolSelectionFilter( aCollector, EXCLUDE_LOCKED | EXCLUDE_TRANSIENTS ); } );

    if( selection.Empty() )
        return 0;

    m_selection = selection;

    if( !m_dialog )
        m_dialog = new DIALOG_POSITION_RELATIVE( editFrame, m_translation, m_anchor );

    m_dialog->Show( true );

    return 0;
}


int POSITION_RELATIVE_TOOL::RelativeItemSelectionMove( wxPoint aPosAnchor, wxPoint aTranslation )
{
    wxPoint aSelAnchor( INT_MAX, INT_MAX );

    // Find top-left item anchor in selection
    for( auto item : m_selection )
    {
        wxPoint itemAnchor = static_cast<BOARD_ITEM*>( item )->GetPosition();

        if( EuclideanNorm( itemAnchor ) < EuclideanNorm( aSelAnchor ) )
            aSelAnchor = itemAnchor;
    }

    wxPoint aggregateTranslation = aPosAnchor + aTranslation - aSelAnchor;

    for( auto item : m_selection )
    {
        m_commit->Modify( item );
        static_cast<BOARD_ITEM*>( item )->Move( aggregateTranslation );
    }

    m_commit->Push( _( "Position Relative" ) );

    if( m_selection.IsHover() )
        m_toolMgr->RunAction( PCB_ACTIONS::selectionClear, true );

    m_toolMgr->RunAction( PCB_ACTIONS::selectionModified, true );
    return 0;
}


int POSITION_RELATIVE_TOOL::SelectPositionRelativeItem( const TOOL_EVENT& aEvent  )
{
    Activate();

    PICKER_TOOL* picker = m_toolMgr->GetTool<PICKER_TOOL>();
    STATUS_TEXT_POPUP statusPopup( frame() );
    bool picking = true;

    statusPopup.SetText( _( "Select reference item..." ) );
    picker->SetSnapping( false );
    picker->Activate();

    picker->SetClickHandler( [&]( const VECTOR2D& aPoint ) -> bool
            {
                m_toolMgr->RunAction( PCB_ACTIONS::selectionClear, true );
                const SELECTION& sel = m_selectionTool->RequestSelection(
                        []( const VECTOR2I& aPt, GENERAL_COLLECTOR& aCollector )
                        { EditToolSelectionFilter( aCollector, EXCLUDE_TRANSIENTS ); } );

                if( sel.Empty() )
                    return true;    // still looking for an item

                m_anchor_item = sel.Front();
                statusPopup.Hide();

                if( m_dialog )
                    m_dialog->UpdateAnchor( sel.Front() );

                picking = false;
                return false;       // got our item; don't need any more
            } );

    picker->SetCancelHandler( [&]()
            {
                statusPopup.Hide();

                if( m_dialog )
                    m_dialog->UpdateAnchor( m_anchor_item );

                picking = false;
            } );

    statusPopup.Move( wxGetMousePosition() + wxPoint( 20, -50 ) );
    statusPopup.Popup();

    while( picking )
    {
        statusPopup.Move( wxGetMousePosition() + wxPoint( 20, -50 ) );
        Wait();
    }

    return 0;
}


void POSITION_RELATIVE_TOOL::setTransitions()
{
    Go( &POSITION_RELATIVE_TOOL::PositionRelative, PCB_ACTIONS::positionRelative.MakeEvent() );
    Go( &POSITION_RELATIVE_TOOL::SelectPositionRelativeItem,
            PCB_ACTIONS::selectpositionRelativeItem.MakeEvent() );
}