package jcgp.backend.function;

import java.util.ArrayList;
import java.util.Arrays;

import jcgp.backend.exceptions.InvalidArgumentsException;
import jcgp.backend.population.Connection;

public class BooleanLogic extends FunctionSet {
	
	public BooleanLogic() {
		name = "1-bit Logic";
		functionList = new Function[]{
				new And(),
				new Or(),
				new Not(),
				new Xor(),
				new Nand(),
				new Nor(),
				new Xnor()};
		
		allowedFunctions = new ArrayList<Function>(Arrays.asList(functionList));
	}

	public static class And extends Function {	
		private int arity = 2;

		@Override
		public Boolean run(Connection... connections) {
			if (connections.length < arity) {
				throw new InvalidArgumentsException("Not enough connections were given.");
			} else {
				Boolean arg1 = ((Boolean) connections[0].getValue());
				Boolean arg2 = ((Boolean) connections[1].getValue());
				Boolean result = arg1 && arg2;

				return result;
			}
		}

		@Override
		public int getArity() {
			return arity;
		}

		@Override
		public String getName() {
			return "AND";
		}
	}
	
	public static class Or extends Function {	
		private int arity = 2;

		@Override
		public Boolean run(Connection... connections) {
			if (connections.length < arity) {
				throw new InvalidArgumentsException("Not enough connections were given.");
			} else {
				Boolean arg1 = ((Boolean) connections[0].getValue());
				Boolean arg2 = ((Boolean) connections[1].getValue());
				Boolean result = arg1 || arg2;

				return result;
			}
		}

		@Override
		public int getArity() {
			return arity;
		}

		@Override
		public String getName() {
			return "OR";
		}
	}

	public static class Not extends Function {	
		private int arity = 1;

		@Override
		public Boolean run(Connection... connections) {
			if (connections.length < arity) {
				throw new InvalidArgumentsException("Not enough connections were given.");
			} else {
				Boolean arg1 = ((Boolean) connections[0].getValue());
				Boolean result = !arg1;

				return result;
			}
		}

		@Override
		public int getArity() {
			return arity;
		}

		@Override
		public String getName() {
			return "NOT";
		}
	}

	public static class Xor extends Function {	
		private int arity = 2;

		@Override
		public Boolean run(Connection... connections) {
			if (connections.length < arity) {
				throw new InvalidArgumentsException("Not enough connections were given.");
			} else {
				Boolean arg1 = ((Boolean) connections[0].getValue());
				Boolean arg2 = ((Boolean) connections[1].getValue());
				Boolean result = arg1 ^ arg2;

				return result;
			}
		}

		@Override
		public int getArity() {
			return arity;
		}

		@Override
		public String getName() {
			return "XOR";
		}
	}

	public static class Nand extends Function {	
		private int arity = 2;

		@Override
		public Boolean run(Connection... connections) {
			if (connections.length < arity) {
				throw new InvalidArgumentsException("Not enough connections were given.");
			} else {
				Boolean arg1 = ((Boolean) connections[0].getValue());
				Boolean arg2 = ((Boolean) connections[1].getValue());
				Boolean result = arg1 && arg2;

				return !result;
			}
		}

		@Override
		public int getArity() {
			return arity;
		}

		@Override
		public String getName() {
			return "NAND";
		}
	}

	public static class Nor extends Function {	
		private int arity = 2;

		@Override
		public Boolean run(Connection... connections) {
			if (connections.length < arity) {
				throw new InvalidArgumentsException("Not enough connections were given.");
			} else {
				Boolean arg1 = ((Boolean) connections[0].getValue());
				Boolean arg2 = ((Boolean) connections[1].getValue());
				Boolean result = arg1 || arg2;

				return !result;
			}
		}

		@Override
		public int getArity() {
			return arity;
		}

		@Override
		public String getName() {
			return "NOR";
		}
	}

	public static class Xnor extends Function {	
		private int arity = 2;

		@Override
		public Boolean run(Connection... connections) {
			if (connections.length < arity) {
				throw new InvalidArgumentsException("Not enough connections were given.");
			} else {
				Boolean arg1 = ((Boolean) connections[0].getValue());
				Boolean arg2 = ((Boolean) connections[1].getValue());
				Boolean result = arg1 ^ arg2;

				return !result;
			}
		}

		@Override
		public int getArity() {
			return arity;
		}

		@Override
		public String getName() {
			return "XNOR";
		}
	}

	
	
}