// Cyphesis Online RPG Server and AI Engine
// Copyright (C) 2016 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 "DensityProperty.h"

#include "rules/simulation/LocatedEntity.h"

#include "common/debug.h"

#include <rules/BBoxProperty.h>

using Atlas::Objects::Entity::Anonymous;
using Atlas::Objects::Operation::Set;

static constexpr auto debug_flag = false;


void DensityProperty::apply(LocatedEntity& entity) {
	updateMass(entity);
}

void DensityProperty::updateMass(LocatedEntity& entity) const {
	auto bboxProp = entity.getPropertyClassFixed<BBoxProperty<LocatedEntity>>();
	if (bboxProp && bboxProp->data().isValid()) {
		auto& bbox = bboxProp->data();
		WFMath::Vector<3> volumeVector = bbox.highCorner() - bbox.lowCorner();
		auto volume = volumeVector.x() * volumeVector.y() * volumeVector.z();

		if (!std::isnormal(volume) && volume != 0) {
			spdlog::warn("Volume of {} is not a normal number.", volume);
		} else {
			auto mass = volume * m_data;

			auto& massProp = entity.requirePropertyClass<Property<double, LocatedEntity>>("mass", mass);

			if (massProp.data() != mass) {
				massProp.set(mass);
				massProp.apply(entity);
				massProp.removeFlags(prop_flag_persistence_clean);
				massProp.addFlags(prop_flag_unsent);
				entity.propertyApplied("mass", massProp);
			}
		}
	}
}

DensityProperty* DensityProperty::copy() const {
	return new DensityProperty(*this);
}

