/***************************************************************************
 *   Copyright (C) 2005-2008 by the FIFE team                              *
 *   http://www.fifengine.de                                               *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   FIFE is free software; you can redistribute it and/or                 *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   This library 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     *
 *   Lesser General Public License for more details.                       *
 *                                                                         *
 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

// Standard C++ library includes

// 3rd party library includes

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "video/renderbackend.h"
#include "video/imagepool.h"
#include "video/animation.h"
#include "video/animationpool.h"
#include "video/fonts/abstractfont.h"
#include "video/image.h"
#include "util/math/fife_math.h"
#include "util/log/logger.h"
#include "model/metamodel/grids/cellgrid.h"
#include "model/metamodel/timeprovider.h"
#include "model/structures/instance.h"
#include "model/structures/layer.h"
#include "model/structures/location.h"

#include "view/camera.h"
#include "genericrenderer.h"


namespace FIFE {
	static Logger _log(LM_VIEWVIEW);

	GenericRendererNode::GenericRendererNode(Instance* attached_instance, Location* relative_location, const Point &relative_point):
		m_instance(attached_instance),
		m_location(relative_location),
		m_point(relative_point) {
	}
	GenericRendererNode::GenericRendererNode(Instance* attached_instance, const Point &relative_point):
		m_instance(attached_instance),
		m_location(NULL),
		m_point(relative_point) {
	}
	GenericRendererNode::GenericRendererNode(Location* attached_location, const Point &relative_point):
		m_instance(NULL),
		m_location(attached_location),
		m_point(relative_point) {
	}
	GenericRendererNode::GenericRendererNode(const Point &attached_point):
		m_instance(NULL),
		m_location(NULL),
		m_point(attached_point) {
	}
	GenericRendererNode::~GenericRendererNode() {
	}

	void GenericRendererNode::setAttached(Instance* attached_instance, Location* relative_location, const Point &relative_point) {
		m_instance = attached_instance;
		m_location = relative_location;
		m_point = relative_point;
	}
	void GenericRendererNode::setAttached(Instance* attached_instance, Location* relative_location) {
		m_instance = attached_instance;
		m_location = relative_location;
	}
	void GenericRendererNode::setAttached(Instance* attached_instance, const Point &relative_point) {
		m_instance = attached_instance;
		m_point = relative_point;
	}
	void GenericRendererNode::setAttached(Instance* attached_instance) {
		m_instance = attached_instance;
	}
	void GenericRendererNode::setAttached(Location* attached_location, const Point &relative_point) {
		m_instance = NULL;
		m_location = attached_location;
		m_point = relative_point;
	}
	void GenericRendererNode::setAttached(Location* attached_location) {
		m_instance = NULL;
		m_location = attached_location;
	}
	void GenericRendererNode::setAttached(const Point &attached_point) {
		m_instance = NULL;
		m_location = NULL;
		m_point = attached_point;
	}

	void GenericRendererNode::setRelative(Location* relative_location) {
		if(m_instance == NULL) {
			throw NotSupported("No instance attached.");
		}
		m_location = relative_location;
	}
	void GenericRendererNode::setRelative(Location* relative_location, Point relative_point) {
		if(m_instance == NULL) {
			throw NotSupported("No instance attached.");
		}
		m_location = relative_location;
		m_point = relative_point;
	}
	void GenericRendererNode::setRelative(const Point &relative_point) {
		if(m_instance == NULL || m_location == NULL) {
			throw NotSupported("No instance or location attached.");
		}
		m_point = relative_point;
	}

	Instance* GenericRendererNode::getAttachedInstance() {
		if(m_instance == NULL) {
			throw NotSupported("No instance attached.");
		}
		return m_instance;
	}
	Location* GenericRendererNode::getAttachedLocation() {
		if(m_instance != NULL || m_location == NULL) {
			throw NotSupported("No location attached.");
		}
		return m_location;
	}
	Point GenericRendererNode::getAttachedPoint() {
		if(m_instance != NULL || m_location != NULL) {
			throw NotSupported("No point attached.");
		}
		return m_point;
	}

	Location* GenericRendererNode::getOffsetLocation() {
		if(m_instance == NULL || m_location == NULL) {
			throw NotSupported("No location as offset used.");
		}
		return m_location;
	}
	Point GenericRendererNode::getOffsetPoint() {
		if(m_instance == NULL && m_location == NULL) {
			throw NotSupported("No point as offset used.");
		}
		return m_point;
	}

	Instance* GenericRendererNode::getInstance() {
		return m_instance;
	}
	Location* GenericRendererNode::getLocation() {
		return m_location;
	}
	Point GenericRendererNode::getPoint() {
		return m_point;
	}

	Point GenericRendererNode::getCalculatedPoint(Camera* cam, Layer* layer, std::vector<Instance*>& instances) {
		ScreenPoint p;
		if(m_instance != NULL) {
			if(m_location != NULL) {
				p = cam->toScreenCoordinates(m_instance->getLocationRef().getMapCoordinates() + m_location->getMapCoordinates());
			}
			else {
				p = cam->toScreenCoordinates(m_instance->getLocation().getMapCoordinates());
			}
		}
		else if(m_location != NULL) {
			p = cam->toScreenCoordinates(m_location->getMapCoordinates());
		}
		else
			return m_point;
		return Point(m_point.x + p.x, m_point.y + p.y);
	}

	GenericRendererLineInfo::GenericRendererLineInfo(GenericRendererNode n1, GenericRendererNode n2, uint8_t r, uint8_t g, uint8_t b):
		GenericRendererElementInfo(),
		m_edge1(n1),
		m_edge2(n2),
		m_red(r),
		m_green(g),
		m_blue(b) {
	}
	void GenericRendererLineInfo::render(Camera* cam, Layer* layer, std::vector<Instance*>& instances, RenderBackend* renderbackend, ImagePool* imagepool, AnimationPool* animpool) {
		Point p1 = m_edge1.getCalculatedPoint(cam, layer, instances);
		Point p2 = m_edge2.getCalculatedPoint(cam, layer, instances);
		renderbackend->drawLine(p1, p2, m_red, m_green, m_blue);
	}
	
	GenericRendererPointInfo::GenericRendererPointInfo(GenericRendererNode anchor, uint8_t r, uint8_t g, uint8_t b):
		GenericRendererElementInfo(),
		m_anchor(anchor),
		m_red(r),
		m_green(g),
		m_blue(b) {
	}
	void GenericRendererPointInfo::render(Camera* cam, Layer* layer, std::vector<Instance*>& instances, RenderBackend* renderbackend, ImagePool* imagepool, AnimationPool* animpool) {
		Point p = m_anchor.getCalculatedPoint(cam, layer, instances);
		renderbackend->putPixel(p.x, p.y, m_red, m_green, m_blue);
	}
	
	GenericRendererQuadInfo::GenericRendererQuadInfo(GenericRendererNode n1, GenericRendererNode n2, GenericRendererNode n3, GenericRendererNode n4, uint8_t r, uint8_t g, uint8_t b):
		GenericRendererElementInfo(),
		m_edge1(n1),
		m_edge2(n2),
		m_edge3(n3),
		m_edge4(n4),
		m_red(r),
		m_green(g),
		m_blue(b) {
	}
	void GenericRendererQuadInfo::render(Camera* cam, Layer* layer, std::vector<Instance*>& instances, RenderBackend* renderbackend, ImagePool* imagepool, AnimationPool* animpool) {
		Point p1 = m_edge1.getCalculatedPoint(cam, layer, instances);
		Point p2 = m_edge2.getCalculatedPoint(cam, layer, instances);
		Point p3 = m_edge3.getCalculatedPoint(cam, layer, instances);
		Point p4 = m_edge4.getCalculatedPoint(cam, layer, instances);
		renderbackend->drawQuad(p1, p2, p3, p4, m_red, m_green, m_blue);
	}
	
	GenericRendererImageInfo::GenericRendererImageInfo(GenericRendererNode anchor, int image):
		GenericRendererElementInfo(),
		m_anchor(anchor),
		m_image(image) {
	}
	void GenericRendererImageInfo::render(Camera* cam, Layer* layer, std::vector<Instance*>& instances, RenderBackend* renderbackend, ImagePool* imagepool, AnimationPool* animpool) {
		Point p = m_anchor.getCalculatedPoint(cam, layer, instances);
		Image* img = &imagepool->getImage(m_image);
		Rect r;
		r.x = p.x-img->getWidth()/2;
		r.y = p.y-img->getHeight()/2;
		r.w = img->getWidth();
		r.h = img->getHeight();
		img->render(r);
	}
	
	GenericRendererAnimationInfo::GenericRendererAnimationInfo(GenericRendererNode anchor, int animation):
		GenericRendererElementInfo(),
		m_anchor(anchor),
		m_animation(animation),
		m_start_time(SDL_GetTicks()),
		m_time_scale(1.0) {
	}
	void GenericRendererAnimationInfo::render(Camera* cam, Layer* layer, std::vector<Instance*>& instances, RenderBackend* renderbackend, ImagePool* imagepool, AnimationPool* animpool) {
		Point p = m_anchor.getCalculatedPoint(cam, layer, instances);
		Animation& animation = animpool->getAnimation(m_animation);
		int animtime = scaleTime(m_time_scale, SDL_GetTicks() - m_start_time) % animation.getDuration();
		Image* img = animation.getFrameByTimestamp(animtime);
		Rect r;
		r.x = p.x-img->getWidth()/2;
		r.y = p.y-img->getHeight()/2;
		r.w = img->getWidth();
		r.h = img->getHeight();
		img->render(r);
	}
	
	GenericRendererTextInfo::GenericRendererTextInfo(GenericRendererNode anchor, AbstractFont* font, std::string text):
		GenericRendererElementInfo(),
		m_anchor(anchor),
		m_font(font),
		m_text(text) {
	}
	void GenericRendererTextInfo::render(Camera* cam, Layer* layer, std::vector<Instance*>& instances, RenderBackend* renderbackend, ImagePool* imagepool, AnimationPool* animpool) {
		Point p = m_anchor.getCalculatedPoint(cam, layer, instances);
		Image* img = m_font->getAsImageMultiline(m_text);
		Rect r;
		r.x = p.x-img->getWidth()/2;
		r.y = p.y-img->getHeight()/2;
		r.w = img->getWidth();
		r.h = img->getHeight();
		img->render(r);
	}
	
	GenericRenderer* GenericRenderer::getInstance(IRendererContainer* cnt) {
		return dynamic_cast<GenericRenderer*>(cnt->getRenderer("GenericRenderer"));
	}
	
	GenericRenderer::GenericRenderer(RenderBackend* renderbackend, int position, ImagePool* imagepool, AnimationPool* animpool):
		RendererBase(renderbackend, position),
		m_imagepool(imagepool),
		m_animationpool(animpool),
		m_groups() {
		setEnabled(false);
	}

	GenericRenderer::GenericRenderer(const GenericRenderer& old):
		RendererBase(old),
		m_imagepool(old.m_imagepool),
		m_animationpool(old.m_animationpool),
		m_groups() {
		setEnabled(false);
	}

	RendererBase* GenericRenderer::clone() {
		return new GenericRenderer(*this);
	}

	GenericRenderer::~GenericRenderer() {
	}
	void GenericRenderer::addLine(int group, GenericRendererNode n1, GenericRendererNode n2, uint8_t r, uint8_t g, uint8_t b) {
		GenericRendererElementInfo* info = new GenericRendererLineInfo(n1, n2, r, g, b);
		m_groups[group].push_back(info);
	}
	void GenericRenderer::addPoint(int group, GenericRendererNode n, uint8_t r, uint8_t g, uint8_t b) {
		GenericRendererElementInfo* info = new GenericRendererPointInfo(n, r, g, b);
		m_groups[group].push_back(info);
	}
	void GenericRenderer::addQuad(int group, GenericRendererNode n1, GenericRendererNode n2, GenericRendererNode n3, GenericRendererNode n4, uint8_t r, uint8_t g, uint8_t b) {
		GenericRendererElementInfo* info = new GenericRendererQuadInfo(n1, n2, n3, n4, r, g, b);
		m_groups[group].push_back(info);
	}
	void GenericRenderer::addText(int group, GenericRendererNode n, AbstractFont* font, std::string text) {
		GenericRendererElementInfo* info = new GenericRendererTextInfo(n, font, text);
		m_groups[group].push_back(info);
	}
	void GenericRenderer::addImage(int group, GenericRendererNode n, int image) {
		GenericRendererElementInfo* info = new GenericRendererImageInfo(n, image);
		m_groups[group].push_back(info);
	}
	void GenericRenderer::addAnimation(int group, GenericRendererNode n, int animation) {
		GenericRendererElementInfo* info = new GenericRendererAnimationInfo(n, animation);
		m_groups[group].push_back(info);
	}
	void GenericRenderer::removeAll(int group) {
		std::vector<GenericRendererElementInfo*>::const_iterator info_it = m_groups[group].begin();
		for (;info_it != m_groups[group].end(); ++info_it) {
			delete *info_it;
		}
		m_groups[group].clear();
		m_groups.erase(group);
	}

	void GenericRenderer::render(Camera* cam, Layer* layer, std::vector<Instance*>& instances) {
		std::map<int, std::vector<GenericRendererElementInfo*> >::iterator group_it = m_groups.begin();
		for(; group_it != m_groups.end(); ++group_it) {
			std::vector<GenericRendererElementInfo*>::const_iterator info_it = group_it->second.begin();
			for (;info_it != group_it->second.end(); ++info_it) {
				(*info_it)->render(cam, layer, instances, m_renderbackend, m_imagepool, m_animationpool);
			}
		}
	}
}