/*
 Copyright (C) 2009 Erik Ogenvik

 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 "AuthoringVisualization.h"
#include "domain/EmberEntity.h"
#include "components/ogre/Convert.h"
#include "components/ogre/OgreInfo.h"
#include "components/ogre/EmberOgre.h"
#include "components/ogre/World.h"
#include "components/ogre/Scene.h"
#include "domain/IEntityControlDelegate.h"

#include <OgreSceneNode.h>
#include <OgreEntity.h>
#include <OgreSceneManager.h>
#include <components/ogre/EntityCollisionInfo.h>

#include <memory>

namespace Ember::OgreView::Authoring {
AuthoringVisualization::AuthoringVisualization(EmberEntity& entity, Ogre::SceneNode* sceneNode) :
		mEntity(entity),
		mSceneNode(sceneNode),
		mGraphicalRepresentation(nullptr),
		mControlDelegate(nullptr) {
	createGraphicalRepresentation();
	mEntity.Moved.connect(sigc::mem_fun(*this, &AuthoringVisualization::entity_Moved));
	updatePositionAndOrientation();
}

AuthoringVisualization::~AuthoringVisualization() {
	removeGraphicalRepresentation();
}

Ogre::SceneNode* AuthoringVisualization::getSceneNode() const {
	return mSceneNode;
}

EmberEntity& AuthoringVisualization::getEntity() {
	return mEntity;
}

void AuthoringVisualization::setControlDelegate(const IEntityControlDelegate* controlDelegate) {
	mControlDelegate = controlDelegate;
}

void AuthoringVisualization::entity_Moved() {
	updatePositionAndOrientation();
}

void AuthoringVisualization::updatePositionAndOrientation() {
	if (mControlDelegate) {
		mSceneNode->setPosition(Convert::toOgre(mControlDelegate->getPosition()));
		mSceneNode->setOrientation(Convert::toOgre(mControlDelegate->getOrientation()));
		if (mCollisionDetector) {
			mCollisionDetector->updateTransforms(mControlDelegate->getPosition(), mControlDelegate->getOrientation());
		}
	} else {
		if (mEntity.getPosition().isValid()) {
			mSceneNode->setPosition(Convert::toOgre(mEntity.getPosition()));
		}
		if (mEntity.getOrientation().isValid()) {
			mSceneNode->setOrientation(Convert::toOgre(mEntity.getOrientation()));
		}
		if (mCollisionDetector && mEntity.getOrientation().isValid() && mEntity.getPosition().isValid()) {
			mCollisionDetector->updateTransforms(mEntity.getPosition(), mEntity.getOrientation());
		}
	}
}

void AuthoringVisualization::createGraphicalRepresentation() {
	try {
		mGraphicalRepresentation = mSceneNode->getCreator()->createEntity(OgreInfo::createUniqueResourceName("authoring_visualization_" + mEntity.getId()), "common/primitives/model/axes.mesh");
		if (mGraphicalRepresentation) {
			try {
				mSceneNode->attachObject(mGraphicalRepresentation);
				mGraphicalRepresentation->setRenderingDistance(100);

				auto& bulletWorld = EmberOgre::getSingleton().getWorld()->getScene().getBulletWorld();
				mCollisionDetector = std::make_unique<BulletCollisionDetector>(bulletWorld);
				//These should only be pickable, not occluding.
				mCollisionDetector->setMask(COLLISION_MASK_PICKABLE);
				auto shape = bulletWorld.createMeshShape(mGraphicalRepresentation->getMesh());
				if (shape) {
					mCollisionDetector->addCollisionShape(shape);
				}
				mCollisionDetector->collisionInfo = EntityCollisionInfo{&mEntity, true};
			} catch (const std::exception& ex) {
				logger->warn("Error when attaching axes mesh: {}", ex.what());
				mSceneNode->getCreator()->destroyMovableObject(mGraphicalRepresentation);
			}
		}
	} catch (const std::exception& ex) {
		logger->warn("Error when loading axes mesh: {}", ex.what());
	}
}

void AuthoringVisualization::removeGraphicalRepresentation() {
	mSceneNode->detachAllObjects();
	if (mGraphicalRepresentation) {
		mSceneNode->getCreator()->destroyEntity(mGraphicalRepresentation);
		mGraphicalRepresentation = nullptr;
	}
	mSceneNode->getCreator()->destroySceneNode(mSceneNode);
	mSceneNode = nullptr;
	mCollisionDetector.reset();
}

}


