package jcgp.population;

import java.util.ArrayList;

import jcgp.Parameters;
import jcgp.Utilities;
import jcgp.function.Function;


public class Node implements MutableElement, Connection {
	
	private Function function;
	private Connection[] connections;
	private int column, row;
	private Chromosome chromosome;

	public Node(Chromosome chromosome, int row, int column) {
		this.chromosome = chromosome;
		this.column = column;
		this.row = row;
	}
	
	@Override
	public int getValue() {
		return function.run(connections);
	}
	
	public void setFunction(Function newFunction) {
		function = newFunction;
		chromosome.recomputeActiveNodes();
	}
	
	@Override
	public void setConnection(Connection newConnection) {
		connections[Utilities.getRandomInt(connections.length)] = newConnection;
		chromosome.recomputeActiveNodes();
	}
	
	public void initialise(Function newFunction, Connection ... newConnections) throws InsufficientConnectionsException {
		
		function = newFunction;
		
		if (newConnections.length >= Parameters.getMaxArity()) {
			connections = newConnections;
		} else {
			throw new InsufficientConnectionsException();
		}
	}

	public int getColumn() {
		
		return column;
	}

	public int getRow() {
		return row;
	}

	public Function getFunction() {
		return function;
	}

	public Connection getConnection(int index) {
		return connections[index];
	}

	@Override
	public void getActive(ArrayList<Connection> activeNodes) {
		if (!activeNodes.contains(this)) {
			activeNodes.add(this);
		}
		for (int i = 0; i < function.getArity(); i++) {
			connections[i].getActive(activeNodes);
		}
	}
}