/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2012 Jean-Pierre Charras, jp.charras at wanadoo.fr
 * Copyright (C) 2004-2012 KiCad Developers, see change_log.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
 */

/**
 * @file lib_circle.cpp
 * @brief LIB_CIRCLE class implementation.
 */

#include <fctsys.h>
#include <gr_basic.h>
#include <macros.h>
#include <class_drawpanel.h>
#include <plot_common.h>
#include <trigo.h>
#include <wxstruct.h>
#include <richio.h>
#include <base_units.h>

#include <general.h>
#include <protos.h>
#include <lib_circle.h>
#include <transform.h>


LIB_CIRCLE::LIB_CIRCLE( LIB_COMPONENT* aParent ) :
    LIB_ITEM( LIB_CIRCLE_T, aParent )
{
    m_Radius     = 0;
    m_Width      = 0;
    m_Fill       = NO_FILL;
    m_isFillable = true;
    m_typeName   = _( "Circle" );
}


bool LIB_CIRCLE::Save( OUTPUTFORMATTER& aFormatter )
{
    aFormatter.Print( 0, "C %d %d %d %d %d %d %c\n", m_Pos.x, m_Pos.y,
                      m_Radius, m_Unit, m_Convert, m_Width, fill_tab[m_Fill] );

    return true;
}


bool LIB_CIRCLE::Load( LINE_READER& aLineReader, wxString& aErrorMsg )
{
    char tmp[256];
    char* line = (char*) aLineReader;

    int  cnt = sscanf( line + 2, "%d %d %d %d %d %d %s", &m_Pos.x, &m_Pos.y,
                       &m_Radius, &m_Unit, &m_Convert, &m_Width, tmp );

    if( cnt < 6 )
    {
        aErrorMsg.Printf( _( "circle only had %d parameters of the required 6" ), cnt );
        return false;
    }

    if( tmp[0] == 'F' )
        m_Fill = FILLED_SHAPE;

    if( tmp[0] == 'f' )
        m_Fill = FILLED_WITH_BG_BODYCOLOR;

    return true;
}


bool LIB_CIRCLE::HitTest( const wxPoint& aPosRef )
{
    int mindist = GetPenSize() / 2;

    // Have a minimal tolerance for hit test
    if( mindist < MINIMUM_SELECTION_DISTANCE )
        mindist = MINIMUM_SELECTION_DISTANCE;

    return HitTest( aPosRef, mindist, DefaultTransform );
}


bool LIB_CIRCLE::HitTest( wxPoint aPosRef, int aThreshold, const TRANSFORM& aTransform )
{
    if( aThreshold < 0 )
        aThreshold = GetPenSize() / 2;

    wxPoint relpos = aPosRef - aTransform.TransformCoordinate( m_Pos );

    int dist = KiROUND( sqrt( ( (double) relpos.x * relpos.x ) +
                              ( (double) relpos.y * relpos.y ) ) );

    if( abs( dist - m_Radius ) <= aThreshold )
        return true;
    return false;
}


EDA_ITEM* LIB_CIRCLE::Clone() const
{
    return new LIB_CIRCLE( *this );
}


int LIB_CIRCLE::compare( const LIB_ITEM& aOther ) const
{
    wxASSERT( aOther.Type() == LIB_CIRCLE_T );

    const LIB_CIRCLE* tmp = ( LIB_CIRCLE* ) &aOther;

    if( m_Pos.x != tmp->m_Pos.x )
        return m_Pos.x - tmp->m_Pos.x;

    if( m_Pos.y != tmp->m_Pos.y )
        return m_Pos.y - tmp->m_Pos.y;

    if( m_Radius != tmp->m_Radius )
        return m_Radius - tmp->m_Radius;

    return 0;
}


void LIB_CIRCLE::SetOffset( const wxPoint& aOffset )
{
    m_Pos += aOffset;
}


bool LIB_CIRCLE::Inside( EDA_RECT& aRect ) const
{
    /*
     * FIXME: This fails to take into account the radius around the center
     *        point.
     */
    return aRect.Contains( m_Pos.x, -m_Pos.y );
}


void LIB_CIRCLE::Move( const wxPoint& aPosition )
{
    m_Pos = aPosition;
}


void LIB_CIRCLE::MirrorHorizontal( const wxPoint& aCenter )
{
    m_Pos.x -= aCenter.x;
    m_Pos.x *= -1;
    m_Pos.x += aCenter.x;
}


void LIB_CIRCLE::MirrorVertical( const wxPoint& aCenter )
{
    m_Pos.y -= aCenter.y;
    m_Pos.y *= -1;
    m_Pos.y += aCenter.y;
}


void LIB_CIRCLE::Rotate( const wxPoint& aCenter, bool aRotateCCW )
{
    int rot_angle = aRotateCCW ? -900 : 900;

    RotatePoint( &m_Pos, aCenter, rot_angle );
}


void LIB_CIRCLE::Plot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
                       const TRANSFORM& aTransform )
{
    wxPoint pos = aTransform.TransformCoordinate( m_Pos ) + aOffset;

    if( aFill && m_Fill == FILLED_WITH_BG_BODYCOLOR )
    {
        aPlotter->SetColor( ReturnLayerColor( LAYER_DEVICE_BACKGROUND ) );
        aPlotter->Circle( pos, m_Radius * 2, FILLED_SHAPE, 0 );
    }

    bool already_filled = m_Fill == FILLED_WITH_BG_BODYCOLOR;
    aPlotter->SetColor( ReturnLayerColor( LAYER_DEVICE ) );
    aPlotter->Circle( pos, m_Radius * 2, already_filled ? NO_FILL : m_Fill, GetPenSize() );
}


int LIB_CIRCLE::GetPenSize() const
{
    return ( m_Width == 0 ) ? GetDefaultLineThickness() : m_Width;
}


void LIB_CIRCLE::drawGraphic( EDA_DRAW_PANEL* aPanel, wxDC* aDC, const wxPoint& aOffset,
                              EDA_COLOR_T aColor, GR_DRAWMODE aDrawMode, void* aData,
                              const TRANSFORM& aTransform )
{
    wxPoint pos1;

    EDA_COLOR_T color = ReturnLayerColor( LAYER_DEVICE );

    if( aColor < 0 )       // Used normal color or selected color
    {
        if( IsSelected() )
            color = GetItemSelectedColor();
    }
    else
    {
        color = aColor;
    }

    pos1 = aTransform.TransformCoordinate( m_Pos ) + aOffset;
    GRSetDrawMode( aDC, aDrawMode );

    FILL_T fill = aData ? NO_FILL : m_Fill;
    if( aColor >= 0 )
        fill = NO_FILL;

    if( fill == FILLED_WITH_BG_BODYCOLOR )
        GRFilledCircle( aPanel->GetClipBox(), aDC, pos1.x, pos1.y, m_Radius, GetPenSize(),
                        (m_Flags & IS_MOVED) ? color : ReturnLayerColor( LAYER_DEVICE_BACKGROUND ),
                        ReturnLayerColor( LAYER_DEVICE_BACKGROUND ) );
    else if( fill == FILLED_SHAPE )
        GRFilledCircle( aPanel->GetClipBox(), aDC, pos1.x, pos1.y, m_Radius, 0, color, color );
    else
        GRCircle( aPanel->GetClipBox(), aDC, pos1.x, pos1.y, m_Radius, GetPenSize(), color );

    /* Set to one (1) to draw bounding box around circle to validate bounding
     * box calculation. */
#if 0
    EDA_RECT bBox = GetBoundingBox();
    GRRect( aPanel->GetClipBox(), aDC, bBox.GetOrigin().x, bBox.GetOrigin().y,
            bBox.GetEnd().x, bBox.GetEnd().y, 0, LIGHTMAGENTA );
#endif
}


EDA_RECT LIB_CIRCLE::GetBoundingBox() const
{
    EDA_RECT rect;

    rect.SetOrigin( m_Pos.x - m_Radius, ( m_Pos.y - m_Radius ) * -1 );
    rect.SetEnd( m_Pos.x + m_Radius, ( m_Pos.y + m_Radius ) * -1 );
    rect.Inflate( m_Width / 2, m_Width / 2 );

    return rect;
}


void LIB_CIRCLE::DisplayInfo( EDA_DRAW_FRAME* aFrame )
{
    wxString msg;
    EDA_RECT bBox = GetBoundingBox();

    LIB_ITEM::DisplayInfo( aFrame );

    msg = ReturnStringFromValue( g_UserUnit, m_Width, true );

    aFrame->AppendMsgPanel( _( "Line width" ), msg, BLUE );

    msg = ReturnStringFromValue( g_UserUnit, m_Radius, true );
    aFrame->AppendMsgPanel( _( "Radius" ), msg, RED );

    msg.Printf( wxT( "(%d, %d, %d, %d)" ), bBox.GetOrigin().x,
                bBox.GetOrigin().y, bBox.GetEnd().x, bBox.GetEnd().y );

    aFrame->AppendMsgPanel( _( "Bounding box" ), msg, BROWN );
}


wxString LIB_CIRCLE::GetSelectMenuText() const
{
    return wxString::Format( _( "Circle center (%s, %s), radius %s" ),
                             GetChars( CoordinateToString( m_Pos.x ) ),
                             GetChars( CoordinateToString( m_Pos.y ) ),
                             GetChars( CoordinateToString( m_Radius ) ) );
}


void LIB_CIRCLE::BeginEdit( int aEditMode, const wxPoint aPosition )
{
    wxCHECK_RET( ( aEditMode & ( IS_NEW | IS_MOVED | IS_RESIZED ) ) != 0,
                 wxT( "Invalid edit mode for LIB_CIRCLE object." ) );

    if( aEditMode == IS_NEW )
    {
        m_Pos = m_initialPos = aPosition;
    }
    else if( aEditMode == IS_MOVED )
    {
        m_initialPos = m_Pos;
        m_initialCursorPos = aPosition;
        SetEraseLastDrawItem();
    }
    else if( aEditMode == IS_RESIZED )
    {
        SetEraseLastDrawItem();
    }

    m_Flags = aEditMode;
}


bool LIB_CIRCLE::ContinueEdit( const wxPoint aPosition )
{
    wxCHECK_MSG( ( m_Flags & ( IS_NEW | IS_MOVED | IS_RESIZED ) ) != 0, false,
                   wxT( "Bad call to ContinueEdit().  LIB_CIRCLE is not being edited." ) );

    return false;
}


void LIB_CIRCLE::EndEdit( const wxPoint& aPosition, bool aAbort )
{
    wxCHECK_RET( ( m_Flags & ( IS_NEW | IS_MOVED | IS_RESIZED ) ) != 0,
                   wxT( "Bad call to EndEdit().  LIB_CIRCLE is not being edited." ) );

    SetEraseLastDrawItem( false );
    m_Flags = 0;
}


void LIB_CIRCLE::calcEdit( const wxPoint& aPosition )
{
    if( m_Flags == IS_NEW || m_Flags == IS_RESIZED )
    {
        if( m_Flags == IS_NEW )
            SetEraseLastDrawItem();

        int dx = m_Pos.x - aPosition.x;
        int dy = m_Pos.y - aPosition.y;
        m_Radius = KiROUND( sqrt( ( (double) dx * dx ) + ( (double) dy * dy ) ) );
    }
    else
    {
        Move( m_initialPos + aPosition - m_initialCursorPos );
    }
}