#include "genetic/operatorbasic.h"
#include "genetic/phenotype.h"

#include <bu/random.h>
#include <bu/sio.h>
using namespace Bu;

Genetic::OperatorBasic::OperatorBasic( Phenotype *pProgenitor,
		float fMutationRate ) :
	pProgenitor( pProgenitor ),
	fMutationRate( fMutationRate )
{
}

Genetic::OperatorBasic::~OperatorBasic()
{
	delete pProgenitor;
}

Genetic::Phenotype *Genetic::OperatorBasic::random()
{
	Genetic::Phenotype *pNew = pProgenitor->makeEmptyOffspring();
	pNew->randomize();
	return pNew;
}

Genetic::Phenotype *Genetic::OperatorBasic::mate(
		const Genetic::PhenotypeList &lParents )
{
	Genetic::Phenotype *pChild = lParents.first()->makeEmptyOffspring();

	int iBits = lParents.first()->getSize();
	// Right now, we assume both parents have the same amount of "DNA"
	int iSplitPoint = ((uint32_t)Bu::Random::rand())%iBits;
	pChild->copyFrom( *lParents.first(), 0, iSplitPoint );
	pChild->copyFrom( *lParents.last(), iSplitPoint, iBits-iSplitPoint );

	int iChange = iBits * (Bu::Random::randNorm() * fMutationRate * 1.25);

	for( int j = 0; j < iChange; j++ )
	{
		pChild->mutate( Bu::Random::rand( 0, iBits ), 1.0 );
	}
	
	return pChild;
}