/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004, 2005, 2006, 2007 Olof Naessén and Per Larsson
 * Copyright (c) 2017 Gwilherm Baudic
 *                                                         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
 *    following disclaimer.                     4'_uomm\.  )L);-4     (3=
 * 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$#(    "
 *    to endorse or promote products derived     -   W,  sQQQQmZQ#Wwa]..
 *    from this software without specific        (js, \[QQW$QWW#?!V"".
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 *                                                 -]n w/ '         [.
 * 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,
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 * (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/progressbar.hpp"

#include "guisan/exception.hpp"
#include "guisan/font.hpp"
#include "guisan/graphics.hpp"

namespace gcn
{
	ProgressBar::ProgressBar() : Label()
	{
		mAlignment = Graphics::CENTER;
		mStart = 0;
		mValue = 0;
		mEnd = 100;

		setHeight(getFont()->getHeight());
		setBorderSize(1);
	}

	ProgressBar::ProgressBar(const unsigned int start,
							 const unsigned int end, const unsigned int value) : Label()
	{
		mAlignment = Graphics::CENTER;

		if (start > end)
		{
			mStart = end;
			mEnd = start;
		}
		else
		{
			mStart = start;
			mEnd = end;
		}

		if ((value >= start && value <= end) || (start == 0 && end == 0))
		{
			mValue = value;
		}
		else
		{
			mValue = start;
		}

		setHeight(getFont()->getHeight());
		setBorderSize(1);
	}

	ProgressBar::ProgressBar(const std::string& caption) : Label(caption)
	{
		mCaption = caption;
		mAlignment = Graphics::CENTER;

		setHeight(getFont()->getHeight());
		setBorderSize(1);
	}

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

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

	void ProgressBar::setAlignment(unsigned int alignment)
	{
		mAlignment = alignment;
	}

	unsigned int ProgressBar::getAlignment() const
	{
		return mAlignment;
	}

	void ProgressBar::draw(Graphics* graphics)
	{
		graphics->setColor(getBackgroundColor());
		graphics->fillRectangle(Rectangle(0, 0, getWidth(), getHeight()));

		int textX;
		int textY = getHeight() / 2 - getFont()->getHeight() / 2;

		graphics->setColor(getSelectionColor());
		int progressWidth;
		if (mStart == 0 && mEnd == 0)
		{
			// Infinite scrollbar
			progressWidth = getWidth() / 5;
			int barX = getWidth() * static_cast<int>(mValue) / 100;

			if (barX + progressWidth > getWidth())
			{
				graphics->fillRectangle(Rectangle(barX, 0, getWidth() - barX, getHeight()));
				graphics->fillRectangle(Rectangle(0, 0, progressWidth - (getWidth() - barX), getHeight()));
			}
			else
			{
				graphics->fillRectangle(Rectangle(barX, 0, progressWidth, getHeight()));
			}
		}
		else
		{
			// Standard scrollbar
			progressWidth = getWidth() * static_cast<int>(mValue) / static_cast<int>(mEnd - mStart);
			graphics->fillRectangle(Rectangle(0, 0, progressWidth, getHeight()));
		}

		switch (getAlignment())
		{
		case Graphics::LEFT:
			textX = 0;
			break;
		case Graphics::CENTER:
			textX = getWidth() / 2;
			break;
		case Graphics::RIGHT:
			textX = getWidth();
			break;
		default:
			throw GCN_EXCEPTION("Unknown alignment.");
		}

		graphics->setFont(getFont());
		Color color = getForegroundColor();
		if (!isEnabled())
			color = color - 0x303030;
		graphics->setColor(color);
		graphics->drawText(getCaption(), textX, textY, getAlignment(), isEnabled());
	}

	void ProgressBar::drawBorder(Graphics* graphics)
	{
		Color faceColor = getBaseColor();
		Color highlightColor, shadowColor;
		int alpha = getBaseColor().a;
		int width = getWidth() + getBorderSize() * 2 - 1;
		int height = getHeight() + getBorderSize() * 2 - 1;
		highlightColor = faceColor + 0x303030;
		highlightColor.a = alpha;
		shadowColor = faceColor - 0x303030;
		shadowColor.a = alpha;

		unsigned int i;
		for (i = 0; i < getBorderSize(); ++i)
		{
			graphics->setColor(shadowColor);
			graphics->drawLine(i, i, width - i, i);
			graphics->drawLine(i, i + 1, i, height - i - 1);
			graphics->setColor(highlightColor);
			graphics->drawLine(width - i, i + 1, width - i, height - i);
			graphics->drawLine(i, height - i, width - i - 1, height - i);
		}
	}

	void ProgressBar::adjustSize()
	{
		setHeight(getFont()->getHeight());
	}

	void ProgressBar::setStart(const unsigned int start)
	{
		if (start <= mEnd)
		{
			mStart = start;
		}
	}

	unsigned int ProgressBar::getStart() const
	{
		return mStart;
	}

	void ProgressBar::setEnd(const unsigned int end)
	{
		if (end >= mStart)
		{
			mEnd = end;
		}
	}

	unsigned int ProgressBar::getEnd() const
	{
		return mEnd;
	}

	void ProgressBar::setValue(const unsigned int value)
	{
		if (value >= mStart && value <= mEnd)
		{
			mValue = value;
		}
		else
		{
			if (mStart == 0 && mEnd == 0)
			{
				mValue = value % 100;
			}
		}
	}

	unsigned int ProgressBar::getValue() const
	{
		return mValue;
	}
}
