/*
   base/spacemine.cc
   This file is part of the Osirion project and is distributed under
   the terms and conditions of the GNU General Public License version 2
*/

#include "base/spacemine.h"
#include "base/game.h"
#include "math/functions.h"

namespace game
{


SpaceMine::SpaceMine() : EntityDynamic()
{
	entity_moduletypeid = spacemine_enttype;
	set_name("Space mine");
	set_label("spacemine");
		
	set_flag(core::Entity::KeepAlive);
/*	
	// setting 
	set_radius(0);
	
	// use template settings if available
	if (cargopod_template) {
		cargopod_template->apply(this);
	}
	
	// radius fallback
	if (!radius()) {
		if (model()->radius()) {
			set_radius(model()->radius());
		} else {
			set_radius(0.1f);
		}
	}
*/
	// FIXME should be loaded from the Weapon Info
	set_shape(core::Entity::Sphere);
	set_modelname("maps/static/cargopod001");
	set_radius(0.10f);
	spacemine_detonated_timestamp = 0;
	
	// activate physics
	set_mass(radius());
	reset();
	
	const float damp = Game::g_damping->value();
	body()->setDamping(damp, damp);
}

SpaceMine::~SpaceMine()
{

}

void SpaceMine::upkeep(const unsigned long timestamp)
{
	// space mines dissapear on upkeep
	die();
}

void SpaceMine::collision(core::Entity *other)
{
	if (state() == core::Entity::Destroyed) {
		return;
	}
	
	// mines explode on impact
	if ((other->type() == core::Entity::Dynamic) || (other->type() == core::Entity::Controlable)) {
		
		core::EntityDynamic *entity = static_cast<core::EntityDynamic *>(other);
				
		math::Vector3f explosion_direction(entity->location() - location());
		explosion_direction.normalize();
		
		math::Vector3f explosion_torque(math::randomf(2.0f) - 1.0f, math::randomf(2.0f) - 1.0f, math::randomf(2.0f) - 1.0f);
		explosion_torque.normalize();
		
		const float force = math::max(entity->mass(), entity->radius() * 100.0f);
	
		entity->body()->applyCentralImpulse(math::to_btVector3(explosion_direction * force ));
		entity->body()->applyTorqueImpulse(math::to_btVector3(explosion_torque * force * 0.1f));
		
		spacemine_detonated_timestamp = core::game()->time();
	}
	
	set_state(core::Entity::Destroyed);
	// this method is a bullet callback, we can not reset() here
}
	
void SpaceMine::frame(const unsigned long elapsed)
{
	EntityDynamic::frame(elapsed);
	
	if (state() == core::Entity::Destroyed) {
		
		if (body()) {
			reset();
		}
			
		if (core::game()->time() - spacemine_detonated_timestamp > 5) {
			die();
		}
	}
}
	
// main 'eject mine' function
void SpaceMine::eject(core::EntityControlable *ejector)
{
	if (!ejector->inventory()) {
		return;
	}
	
	if ((ejector->state() == core::Entity::Jump) || (ejector->state() == core::Entity::JumpInitiate)) {
		if (ejector->owner()) {
			ejector->owner()->send("^WCan not eject while hyperspace jump drive is active!");
		}
		return;
	} else if ((ejector->state() == core::Entity::Impulse) || (ejector->state() == core::Entity::ImpulseInitiate)) {
		if (ejector->owner()) {
			ejector->owner()->send("^WCan not eject at impulse speed!");
		}
		return;
	} else if (ejector->state() != core::Entity::Normal) {
		return;
	}
		
	// create space mine
	SpaceMine *spacemine = new SpaceMine();
	
	spacemine->set_color(ejector->color());
	spacemine->set_color_second(ejector->color_second());
	spacemine->set_location(ejector->location() - ejector->axis().forward() * (ejector->radius() + spacemine->radius()));
	spacemine->set_axis(ejector->axis());
	spacemine->set_zone(ejector->zone());
	
	if (ejector->owner()) {
		ejector->owner()->send("Spacemine ejected");
		ejector->owner()->sound("fx/eject");
	}
	
	spacemine->reset();
}

} // namespace game