class MenuState extends FlxState
{

	private var inputParams:Array<Array<Int>> = [[0, 0], [0, 1], [1, 0], [1, 1]];
	private var rightAnswers:Array<Int> = [0, 1, 1, 0];

	private var echo:Int = 60000;
	private var weightSave:Array<Float>;
	private var errorMSE:Float = 1;

	override public function create():Void
	{
		super.create();

		//start
		var weight:Array<Float> = new Array<Float>();

		//epoha
		for (i in 0...echo){
			//iteration
			//weight generation
			var weight:Array<Float> = new Array<Float>();
			for (j in 0...6){
				weight[j] = Math.random();
			}

			var errorFinal:Float = 0;

			for (h in 0...inputParams.length - 1){
				var h1Input:Float = inputParams[h][0] * weight[0] + inputParams[h][1] * weight[2];
				var h1Output:Float = sigma(h1Input);

				var h2Input:Float = inputParams[h][0] * weight[1] + inputParams[h][1] * weight[3];
				var h2Output:Float = sigma(h2Input);

				var oInput:Float = h1Output * weight[4] + h1Output * weight[5];
				var oOutput:Float = sigma(oInput);

				errorFinal += Math.pow(rightAnswers[h] - oOutput, 2);
			}

			errorFinal = errorFinal / 4;

			if (errorFinal < errorMSE){
				errorMSE = errorFinal;
				weightSave = weight;
			}
		}

		//test neuro system
		trace("Error min: " + errorMSE);
		trace("Weight :" + weightSave);
		trace(goTest(0, 0));
		trace(goTest(0, 1));
		trace(goTest(1, 0));
		trace(goTest(1, 1));
	}

	private function goTest(num1:Int, num2:Int):Float {
		var h1Input:Float = num1 * weightSave[0] +  num2 * weightSave[2];
		var h1Ouput:Float = sigma(h1Input);

		var h2Input:Float = num1 * weightSave[1] +  num2 * weightSave[3];
		var h2Ouput:Float = sigma(h2Input);

		var oInput:Float = h1Ouput * weightSave[4] + h2Ouput * weightSave[5];
		var oOutput:Float = sigma(oInput);

		return oOutput;
	}

	private function sigma(innerNum:Float):Float	{
		return 1 / (1 + Math.exp(-innerNum));
	}