/*
 Copyright (C) 2009 Erik Ogenvik <erik@ogenvik.org>

 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, write to the Free Software Foundation,
 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "OceanRepresentation.h"
#include "Environment.h"
#include "components/ogre/EmberEntityUserObject.h"
#include <OgreAny.h>
#include <components/ogre/Scene.h>
#include <BulletCollision/CollisionShapes/btStaticPlaneShape.h>
#include <components/ogre/EntityCollisionInfo.h>
#include <memory>

namespace Ember {
namespace OgreView {

namespace Environment {

const std::string OceanRepresentation::sTypeName("OceanRepresentation");

OceanRepresentation::OceanRepresentation(EmberEntity& entity, Environment& environment, Scene& scene) :
		mEntity(entity),
		mEnvironment(environment),
		mBulletCollisionDetector(std::make_unique<BulletCollisionDetector>(scene.getBulletWorld())) {
	mBulletCollisionDetector->collisionInfo = EntityCollisionInfo{&entity, true};
	mEnvironment.setWaterEnabled(true);
	if (mEnvironment.getWater()) {

		createCollisionGeometry();

		mEntity.Moved.connect(sigc::mem_fun(*this, &OceanRepresentation::entity_Moved));
		updateWaterPosition();

		mEnvironment.getWater()->setUserAny(Ogre::Any(std::make_shared<EmberEntityUserObject>(EmberEntityUserObject{entity})));
	}
}

OceanRepresentation::~OceanRepresentation() {
	mEnvironment.setWaterEnabled(false);
}

const std::string& OceanRepresentation::getType() const {
	return sTypeName;
}

const std::string& OceanRepresentation::getTypeNameForClass() {
	return sTypeName;
}

void OceanRepresentation::setVisualize(const std::string& visualization, bool visualize) {

}

bool OceanRepresentation::getVisualize(const std::string& visualization) const {
	return false;
}

void OceanRepresentation::entity_Moved() {
	updateWaterPosition();
}

void OceanRepresentation::updateWaterPosition() {
	if (mEnvironment.getWater()) {
		if (mEntity.getPredictedPos().isValid()) {
			//If there's a bbox, use the top of the bbox for the level.
			// Otherwise just use the position of the entity.
			auto waterYPos = mEntity.getPredictedPos().y();
			if (mEntity.getBBox().isValid()) {
				waterYPos += mEntity.getBBox().highCorner().y();
			}
			mEnvironment.getWater()->setLevel((float)waterYPos);

			mBulletCollisionDetector->updateTransforms({0, waterYPos, 0}, WFMath::Quaternion::IDENTITY());
		}
	}
}

void OceanRepresentation::createCollisionGeometry() {
	auto planeShape = std::make_shared<btStaticPlaneShape>(btVector3(0, 1, 0), (btScalar) 0);
	mBulletCollisionDetector->addCollisionShape(std::move(planeShape));
}

}
}
}

