/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004, 2005, 2006, 2007 Olof Naessén and Per Larsson
 *
 *                                                         Js_./
 * Per Larsson a.k.a finalman                          _RqZ{a<^_aa
 * Olof Naessén a.k.a jansem/yakslem                _asww7!uY`>  )\a//
 *                                                 _Qhm`] _f "'c  1!5m
 * Visit: http://guichan.darkbits.org             )Qk<P ` _: :+' .'  "{[
 *                                               .)j(] .d_/ '-(  P .   S
 * License: (BSD)                                <Td/Z <fP"5(\"??"\a.  .L
 * Redistribution and use in source and          _dV>ws?a-?'      ._/L  #'
 * binary forms, with or without                 )4d[#7r, .   '     )d`)[
 * modification, are permitted provided         _Q-5'5W..j/?'   -?!\)cam'
 * that the following conditions are met:       j<<WP+k/);.        _W=j f
 * 1. Redistributions of source code must       .$%w\/]Q  . ."'  .  mj$
 *    retain the above copyright notice,        ]E.pYY(Q]>.   a     J@\
 *    this list of conditions and the           j(]1u<sE"L,. .   ./^ ]{a
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 * 2. Redistributions in binary form must        )_]X{Z('a_"a7'<a"a,  ]"[
 *    reproduce the above copyright notice,       #}<]m7`Za??4,P-"'7. ).m
 *    this list of conditions and the            ]d2e)Q(<Q(  ?94   b-  LQ/
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 *    documentation and/or other materials      .Z!=J ]e []('-4f _ ) -.)m]'
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 *    names of its contributors may be used     =3)= _f  (_yQmWW$#(    "
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 *    from this software without specific        (js, \[QQW$QWW#?!V"".
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT       )/ )/           !
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY         <  (; sac    ,    '
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 * 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.
 */

/*
 * For comments regarding functions please see the header file.
 */

#include "guisan/widgets/radiobutton.hpp"

#include "guisan/font.hpp"
#include "guisan/graphics.hpp"
#include "guisan/key.hpp"
#include "guisan/mouseinput.hpp"

namespace gcn
{
    RadioButton::GroupMap RadioButton::mGroupMap;

    RadioButton::RadioButton() : RadioButton("", "", false)
    {}

    RadioButton::RadioButton(const std::string& caption, const std::string& group, bool selected) :
        mCaption(caption)
    {
        setGroup(group);
        setSelected(selected);

        setFocusable(true);
        addMouseListener(this);
        addKeyListener(this);

        adjustSize();
    }

    RadioButton::~RadioButton()
    {
        // Remove us from the group list
        setGroup("");
    }

    void RadioButton::draw(Graphics* graphics)
    {
        graphics->pushClipArea(Rectangle(1,
            1,
            getWidth() - 1,
            getHeight() - 1));
        drawBox(graphics);
        graphics->popClipArea();


        graphics->setFont(getFont());
        if (isEnabled())
            graphics->setColor(getForegroundColor());
        else
            graphics->setColor(Color(128, 128, 128));

        if (isFocused())
        {
            graphics->drawRectangle(Rectangle(0, 0, getWidth(), getHeight()));
        }

        const int h = getHeight() + getHeight() / 2;

        graphics->drawText(getCaption(), h - 2, 0, Graphics::Left, isEnabled());
    }

    void RadioButton::drawBox(Graphics* graphics)
    {
        int h;

        if (getHeight() % 2 == 0)
        {
            h = getHeight() - 4;
        }
        else
        {
            h = getHeight() - 3;
        }

        const int alpha = getBaseColor().a;
        Color faceColor = getBaseColor();
        faceColor.a = alpha;
        Color highlightColor = faceColor + 0x303030;
        highlightColor.a = alpha;
        Color shadowColor = faceColor - 0x303030;
        shadowColor.a = alpha;

        Color backCol = getBackgroundColor();
        if (!isEnabled())
            backCol = backCol - 0x303030;
        graphics->setColor(backCol);

        int i;
        const int hh = (h + 1) / 2;

        for (i = 1; i <= hh; ++i)
        {
            graphics->drawLine(hh - i + 1,
                i,
                hh + i - 1,
                i);
        }

        for (i = 1; i < hh; ++i)
        {
            graphics->drawLine(hh - i + 1,
                h - i,
                hh + i - 1,
                h - i);
        }

        graphics->setColor(shadowColor);
        graphics->drawLine(hh, 0, 0, hh);
        graphics->drawLine(hh + 1, 1, h - 1, hh - 1);

        graphics->setColor(highlightColor);
        graphics->drawLine(1, hh + 1, hh, h);
        graphics->drawLine(hh + 1, h - 1, h, hh);

        graphics->setColor(getForegroundColor());

        const int hhh = hh - 3;
        if (mSelected)
        {
            for (i = 0; i < hhh; ++i)
            {
                graphics->drawLine(hh - i, 4 + i, hh + i, 4 + i);
            }
            for (i = 0; i < hhh; ++i)
            {
                graphics->drawLine(hh - i, h - 4 - i, hh + i, h - 4 - i);
            }
        }
    }

    bool RadioButton::isSelected() const
    {
        return mSelected;
    }

    void RadioButton::setSelected(bool selected)
    {
        if (selected && !mGroup.empty())
        {
            auto range = mGroupMap.equal_range(mGroup);

            for (auto iter = range.first; iter != range.second; iter++)
            {
                if (iter->second->isSelected())
                {
                    iter->second->setSelected(false);
                }
            }
        }

        mSelected = selected;
    }

    const std::string& RadioButton::getCaption() const
    {
        return mCaption;
    }

    void RadioButton::setCaption(const std::string caption)
    {
        mCaption = caption;
    }

    void RadioButton::keyPressed(KeyEvent& keyEvent)
    {
        const Key key = keyEvent.getKey();

        if (key.getValue() == Key::Enter ||
            key.getValue() == Key::Space)
        {
            setSelected(true);
            distributeActionEvent();
            keyEvent.consume();
        }
    }

    void RadioButton::mouseClicked(MouseEvent& mouseEvent)
    {
        if (mouseEvent.getButton() == MouseEvent::Left)
        {
            setSelected(true);
            distributeActionEvent();
        }
    }

    void RadioButton::mouseDragged(MouseEvent& mouseEvent)
    {
        mouseEvent.consume();
    }

    void RadioButton::setGroup(const std::string& group)
    {
        if (!mGroup.empty())
        {
            auto range = mGroupMap.equal_range(mGroup);

            for (auto iter = range.first; iter != range.second; iter++)
            {
                if (iter->second == this)
                {
                    mGroupMap.erase(iter);
                    break;
                }
            }
        }

        if (!group.empty())
        {
            mGroupMap.insert(
                std::pair<std::string, RadioButton*>(group, this));
        }

        mGroup = group;
    }

    const std::string& RadioButton::getGroup() const
    {
        return mGroup;
    }

    void RadioButton::adjustSize()
    {
        const int height = getFont()->getHeight();

        setHeight(height);
        setWidth(getFont()->getWidth(getCaption()) + height + height / 2);
    }
}
