/*      _______   __   __   __   ______   __   __   _______   __   __
 *     / _____/\ / /\ / /\ / /\ / ____/\ / /\ / /\ / ___  /\ /  |\/ /\
 *    / /\____\// / // / // / // /\___\// /_// / // /\_/ / // , |/ / /
 *   / / /__   / / // / // / // / /    / ___  / // ___  / // /| ' / /
 *  / /_// /\ / /_// / // / // /_/_   / / // / // /\_/ / // / |  / /
 * /______/ //______/ //_/ //_____/\ /_/ //_/ //_/ //_/ //_/ /|_/ /
 * \______\/ \______\/ \_\/ \_____\/ \_\/ \_\/ \_\/ \_\/ \_\/ \_\/
 *
 * Copyright (c) 2004, 2005 darkbits                        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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 * 3. Neither the name of Guichan nor the      :$we` _! + _/ .        j?
 *    names of its contributors may be used     =3)= _f  (_yQmWW$#(    "
 *    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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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES               _Pa,)!f/<[]/  ?"
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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 "stratagus.h"

#include "guichan/exception.h"
#include "guichan/widgets/container.h"

//Wyrmgus start
#include "font.h"
#include "ui/interface.h"
#include "unit/unit.h"
#include "video/video.h"
//Wyrmgus end

namespace gcn
{

	Container::Container()
	{
		mWidgetWithMouse = nullptr;
		mOpaque = true;
	}

	Container::~Container()
	{
		clear();
	}

	void Container::logic()
	{
		logicChildren();
	}

	void Container::draw(Graphics* graphics, std::vector<std::function<void(renderer *)>> &render_commands)
	{
		if (isOpaque())
		{
			graphics->setColor(getBaseColor());
			graphics->fillRectangle(Rectangle(0, 0, getWidth(), getHeight()), render_commands);
		}

		drawChildren(graphics, render_commands);
	}

	void Container::drawBorder(Graphics* graphics, std::vector<std::function<void(renderer *)>> &render_commands)
	{
		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, render_commands);
			graphics->drawLine(i,i + 1, i, height - i - 1, render_commands);
			graphics->setColor(highlightColor);
			graphics->drawLine(width - i,i + 1, width - i, height - i, render_commands);
			graphics->drawLine(i,height - i, width - i - 1, height - i, render_commands);
		}
	}

	void Container::logicChildren()
	{
		WidgetIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			(*iter)->logic();
		}
	}

	void Container::drawChildren(Graphics* graphics, std::vector<std::function<void(renderer *)>> &render_commands)
	{
		WidgetIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if ((*iter)->isVisible())
			{
				// If the widget has a border,
				// draw it before drawing the widget
				if ((*iter)->getBorderSize() > 0)
				{
					Rectangle rec = (*iter)->getDimension();
					rec.x -= (*iter)->getBorderSize();
					rec.y -= (*iter)->getBorderSize();
					rec.width += 2 * (*iter)->getBorderSize();
					rec.height += 2 * (*iter)->getBorderSize();
					graphics->pushClipArea(rec);
					(*iter)->drawBorder(graphics, render_commands);
					graphics->popClipArea();
				}

				graphics->pushClipArea((*iter)->getDimension());
				(*iter)->draw(graphics, render_commands);
				graphics->popClipArea();
			}
		}
		
		//Wyrmgus start
		//if mouse is hovering the widget, show tooltip
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if ((*iter)->hasMouse() && (*iter)->getTooltip() != "")
			{
				int popup_x;
				int popup_y;
				(*iter)->getAbsolutePosition(popup_x, popup_y);
				DrawGenericPopup((*iter)->getTooltip(), popup_x, popup_y, render_commands);
			}
		}
		//Wyrmgus end
	}

	void Container::setOpaque(bool opaque)
	{
		mOpaque = opaque;
	}

	bool Container::isOpaque() const
	{
		return mOpaque;
	}

	void Container::moveToTop(Widget* widget)
	{
		WidgetIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if (*iter == widget)
			{
				mWidgets.erase(iter);
				mWidgets.push_back(widget);
				return;
			}
		}

		throw std::runtime_error("There is no such widget in this container.");
	}

	void Container::moveToBottom(Widget* widget)
	{
		WidgetIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if (*iter == widget)
			{
				mWidgets.erase(iter);
				mWidgets.push_front(widget);
				return;
			}
		}

		throw std::runtime_error("There is no such widget in this container.");
	}

	void Container::_announceDeath(Widget *widget)
	{
		if (mWidgetWithMouse == widget)
		{
			mWidgetWithMouse = nullptr;
		}

		WidgetIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if (*iter == widget)
			{
				mWidgets.erase(iter);
				return;
			}
		}

		throw std::runtime_error("There is no such widget in this container.");
	}

	void Container::getDrawSize(int& width, int& height, Widget* widget)
	{
		WidgetIterator iter;
		bool contains = false;

		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if (widget == *iter)
			{
				contains = true;
				break;
			}
		}

		if (contains)
		{
			Rectangle widgetDim = widget->getDimension();
			Rectangle dim = getDimension();

			width = widgetDim.width;
			height = widgetDim.height;

			if (widgetDim.x < 0)
			{
				width += widgetDim.x;
			}

			if (widgetDim.y < 0)
			{
				height += widgetDim.y;
			}

			if (widgetDim.x + widgetDim.width > dim.width)
			{
				width -= (widgetDim.x + widgetDim.width) - dim.width;
			}

			if (widgetDim.y + widgetDim.height > dim.height)
			{
				height -= (widgetDim.y + widgetDim.height) - dim.height;
			}

			if (width < 0)
			{
				width = 0;
			}

			if (height < 0)
			{
				height = 0;
			}
		}
		else
		{
			throw std::runtime_error("Widget not in container.");
		}
	}

	void Container::add(Widget* widget)
	{
		mWidgets.push_back(widget);
		widget->_setFocusHandler(_getFocusHandler());
		widget->_setParent(this);
	}

	void Container::add(Widget* widget, int x, int y)
	{
		widget->setPosition(x, y);
		add(widget);
	}

	void Container::remove(Widget* widget)
	{
		if (mWidgetWithMouse == widget)
		{
			mWidgetWithMouse = nullptr;
		}

		WidgetIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if (*iter == widget)
			{
				mWidgets.erase(iter);
				widget->_setFocusHandler(nullptr);
				widget->_setParent(nullptr);
				return;
			}
		}
		throw std::runtime_error("There is no such widget in this container.");
	}

	void Container::clear()
	{
		mWidgetWithMouse = nullptr;

		WidgetIterator iter;

		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			(*iter)->_setFocusHandler(nullptr);
			(*iter)->_setParent(nullptr);
		}

		mWidgets.clear();
	}

	void Container::_setFocusHandler(FocusHandler* focusHandler)
	{
		Widget::_setFocusHandler(focusHandler);

		WidgetIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			(*iter)->_setFocusHandler(focusHandler);
		}
	}

	void Container::_mouseInputMessage(const MouseInput &mouseInput)
	{
		Widget* tempWidgetWithMouse = nullptr;

		WidgetIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if ((*iter)->getDimension().isPointInRect(mouseInput.x, mouseInput.y)
				&& (*iter)->isVisible())
			{
				tempWidgetWithMouse = (*iter);
			}
		}

		if (tempWidgetWithMouse != mWidgetWithMouse)
		{
			if (mWidgetWithMouse)
			{
				mWidgetWithMouse->_mouseOutMessage();
			}

			if (tempWidgetWithMouse)
			{
				tempWidgetWithMouse->_mouseInMessage();
			}

			mWidgetWithMouse = tempWidgetWithMouse;
		}

		if (mWidgetWithMouse != nullptr)
		{
			MouseInput mi = mouseInput;
			mi.x -= mWidgetWithMouse->getX();
			mi.y -= mWidgetWithMouse->getY();
			mWidgetWithMouse->_mouseInputMessage(mi);
		}

		if (mWidgetWithMouse == nullptr)
		{
			BasicContainer::_mouseInputMessage(mouseInput);
		}
	}

	void Container::_mouseOutMessage()
	{
		if (mWidgetWithMouse)
		{
			mWidgetWithMouse->_mouseOutMessage();
			mWidgetWithMouse = nullptr;
		}

		Widget::_mouseOutMessage();
	}

	void Container::setDirty(bool dirty)
	{
		WidgetConstIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			(*iter)->setDirty(dirty);
		}
		mDirty = dirty;
	}

	bool Container::getDirty() const
	{
		if (mDirty == true)
		{
			return true;
		}

		WidgetConstIterator iter;
		for (iter = mWidgets.begin(); iter != mWidgets.end(); iter++)
		{
			if ((*iter)->getDirty())
			{
				return true;
			}
		}

		return false;
	}
}
