package jcgp.population;

import java.util.ArrayList;

import javafx.beans.property.SimpleObjectProperty;
import jcgp.exceptions.InsufficientConnectionsException;
import jcgp.function.Function;


public class Node extends Gene implements MutableElement, Connection {

	private SimpleObjectProperty<Function> function;
	private ArrayList<SimpleObjectProperty<Connection>> connections;
	private int column, row;
	private Chromosome chromosome;

	public Node(Chromosome chromosome, int row, int column, int arity) {
		this.function = new SimpleObjectProperty<Function>();
		this.chromosome = chromosome;
		this.column = column;
		this.row = row;
		this.connections = new ArrayList<SimpleObjectProperty<Connection>>(arity);
		for (int c = 0; c < arity; c++) {
			connections.add(new SimpleObjectProperty<Connection>());
		}
	}

	@Override
	public Object getValue() {
		//System.out.print("Calculating node: (" + row + ", " + column + ") > ");
		Connection[] list = new Connection[function.get().getArity()];
		for (int i = 0; i < list.length; i++) {
			list[i] = connections.get(i).get();
		}
		
		return function.get().run(list);
	}

	public void setFunction(Function newFunction) {
		function.set(newFunction);
		chromosome.recomputeActiveNodes();
	}

	@Override
	public void setConnection(int index, Connection newConnection) {
		connections.get(index).set(newConnection);
		chromosome.recomputeActiveNodes();
	}

	public void initialise(Function newFunction, Connection ... newConnections) throws InsufficientConnectionsException {
		function.set(newFunction);
		if (newConnections.length >= connections.size()) {
			for (int i = 0; i < connections.size(); i++) {
				connections.get(i).set(newConnections[i]);
			}
		} else {
			throw new InsufficientConnectionsException();
		}
	}

	public int getColumn() {
		return column;
	}

	public int getRow() {
		return row;
	}

	public Function getFunction() {
		return function.get();
	}
	
	public SimpleObjectProperty<Function> functionProperty() {
		return function;
	}

	public ArrayList<SimpleObjectProperty<Connection>> connections() {
		return connections;
	}
	
	public Connection getConnection(int index) {
		return connections.get(index).get();
	}

	public void getActive(ArrayList<Node> activeNodes) {
		if (!activeNodes.contains(this)) {
			activeNodes.add(this);
		}
		for (int i = 0; i < function.get().getArity(); i++) {
			if (connections.get(i).get() instanceof Node) {
				((Node) connections.get(i).get()).getActive(activeNodes);
			}

		}
	}

	@Override
	public boolean copyOf(MutableElement m) {
		if (this != m) {
			if (m instanceof Node) {
				Node n = (Node) m;
				if (function.get() == n.getFunction()) {
					if (column == n.getColumn() && row == n.getRow()) {
						for (int i = 0; i < connections.size(); i++) {
							if (connections.get(i).get() != n.getConnection(i)) {
								if (connections.get(i).get() instanceof Input && n.getConnection(i) instanceof Input) {
									if (((Input) connections.get(i).get()).getIndex() != ((Input) n.getConnection(i)).getIndex()) {
										return false;
									}
								} else if (connections.get(i).get() instanceof Node && n.getConnection(i) instanceof Node) {
									if (((Node) connections.get(i).get()).getRow() != ((Node) n.getConnection(i)).getRow() &&
											((Node) connections.get(i).get()).getColumn() != ((Node) n.getConnection(i)).getColumn()) {
										return false;
									}
								} else {
									return false;
								}
							} else {
								return false;
							}
						}
						return true;
					}
				}
			}
		}
		return false;
	}

	@Override
	public String getDescription() {
		return "n: " + row + ", " + column;
	}
}