#include "RandomSpawner.h"

#include <cmath>

#include <kurator/engine/Point.h>
#include <kurator/sim/components.h>


namespace kurator
{
namespace sim
{


RandomSpawner::RandomSpawner(const int total_teams, const double distance, const double variation) :
	angle_step {2.0 * M_PI / total_teams},
	device {},
	distribution_d {distance - distance * variation, distance + distance * variation},
	distribution_a {-variation * M_PI, variation * M_PI}
{
}


Transform
RandomSpawner::get(const int team)
{
	const double distance = distribution_d(device);
	const double clean_angle = M_PI + angle_step * team;
	const double angle = clean_angle + distribution_a(device);
	double facing = clean_angle + M_PI;
	if (facing > 2 * M_PI)
		facing -= 2 * M_PI;
	const engine::Point position {
		distance * std::cos(angle),
		distance * std::sin(angle),
	};
	return {position, facing};
}


}  // namespace sim
}  // namespace kurator