//--------------------------------------------------------------------------------
// Code generated by jFuzzyLogic
//--------------------------------------------------------------------------------

function ruleAccumulationMethod_max(defuzzifierValue, valueToAggregate) {
	return (defuzzifierValue > valueToAggregate ? defuzzifierValue : valueToAggregate);
}

function ruleActivationMethod_min(degreeOfSupport, membership) {
	return (degreeOfSupport < membership ? degreeOfSupport : membership);
}

function ruleConnectionMethod_and(antecedent1, antecedent2) {
	return (antecedent1 < antecedent2 ? antecedent1 : antecedent2);
}

function ruleConnectionMethod_or(antecedent1, antecedent2) {
	return (antecedent1 > antecedent2 ? antecedent1 : antecedent2);
}

class FunctionBlock_tipper {

	// VAR_INPUT
	food;
	service;

	// VAR_OUTPUT
	tip;

	// FUZZIFY food
	food_delicious;
	food_rancid;

	// FUZZIFY service
	service_excellent;
	service_good;
	service_poor;

	// DEFUZZIFY tip
	defuzzify_tip;

	// Constructor
	constructor() {
		this.tip = 0.0;
		this.defuzzify_tip = new Array(1000);
	}

	// Calculate function block
	calc() {
		this.reset();
		this.fuzzify();
		this.calc_No1();
		this.defuzzify();
	}

	// RULEBLOCK No1
	calc_No1() {
		// RULE 1 : IF (service IS poor) OR (food IS rancid) THEN tip IS cheap;
		let degreeOfSupport_1 = 1.0 * (ruleConnectionMethod_or(this.service_poor, this.food_rancid));
		if (degreeOfSupport_1 > 0) {
			for (let i = 0; i < 1000; i++) {
				let x = 0.0 + i * 0.03;
				let membership = this.membership_tip_cheap(x);
				let y = ruleActivationMethod_min(degreeOfSupport_1 , membership);
				this.defuzzify_tip[i] = ruleAccumulationMethod_max(this.defuzzify_tip[i], y);
			}
		}

		// RULE 2 : IF service IS good THEN tip IS average;
		let degreeOfSupport_2 = 1.0 * (this.service_good);
		if (degreeOfSupport_2 > 0) {
			for (let i = 0; i < 1000; i++) {
				let x = 0.0 + i * 0.03;
				let membership = this.membership_tip_average(x);
				let y = ruleActivationMethod_min(degreeOfSupport_2 , membership);
				this.defuzzify_tip[i] = ruleAccumulationMethod_max(this.defuzzify_tip[i], y);
			}
		}

		// RULE 3 : IF (service IS excellent) AND (food IS delicious) THEN tip IS generous;
		let degreeOfSupport_3 = 1.0 * (ruleConnectionMethod_and(this.service_excellent, this.food_delicious));
		if (degreeOfSupport_3 > 0) {
			for (let i = 0; i < 1000; i++) {
				let x = 0.0 + i * 0.03;
				let membership = this.membership_tip_generous(x);
				let y = ruleActivationMethod_min(degreeOfSupport_3 , membership);
				this.defuzzify_tip[i] = ruleAccumulationMethod_max(this.defuzzify_tip[i], y);
			}
		}

	}

	// Defuzzify 
	defuzzify() {
		let sum_tip = 0.0;
		let wsum_tip = 0.0;
		let x;
		for (let i = 0; i < 1000; i++) {
			x = 0.0 + i * 0.03;
			sum_tip += this.defuzzify_tip[i];
			wsum_tip += x * this.defuzzify_tip[i];
		}
		this.tip = wsum_tip / sum_tip;
	}

	// Fuzzify all variables
	fuzzify() {
		this.food_delicious = this.membership_food_delicious(this.food);
		this.food_rancid = this.membership_food_rancid(this.food);
		this.service_excellent = this.membership_service_excellent(this.service);
		this.service_good = this.membership_service_good(this.service);
		this.service_poor = this.membership_service_poor(this.service);
	}

	// Membership functions 
	membership_food_delicious(x) {
		if (x <= 7.0)		return 0.0;
		if (x > 9.0)		return 1.0;
		if (x <= 9.0)		return 0.0 + (1.0 - 0.0) * ((x - 7.0) / (9.0 - 7.0));
	}

	membership_food_rancid(x) {
		if (x <= 0.0)		return 1.0;
		if (x > 3.0)		return 0.0;
		if (x <= 1.0)		return 1.0 + (1.0 - 1.0) * ((x - 0.0) / (1.0 - 0.0));
		if (x <= 3.0)		return 1.0 + (0.0 - 1.0) * ((x - 1.0) / (3.0 - 1.0));
	}

	membership_service_excellent(x) {
		if (x <= 6.0)		return 0.0;
		if (x > 9.0)		return 1.0;
		if (x <= 9.0)		return 0.0 + (1.0 - 0.0) * ((x - 6.0) / (9.0 - 6.0));
	}

	membership_service_good(x) {
		if (x <= 1.0)		return 0.0;
		if (x > 9.0)		return 0.0;
		if (x <= 4.0)		return 0.0 + (1.0 - 0.0) * ((x - 1.0) / (4.0 - 1.0));
		if (x <= 6.0)		return 1.0 + (1.0 - 1.0) * ((x - 4.0) / (6.0 - 4.0));
		if (x <= 9.0)		return 1.0 + (0.0 - 1.0) * ((x - 6.0) / (9.0 - 6.0));
	}

	membership_service_poor(x) {
		if (x <= 0.0)		return 1.0;
		if (x > 4.0)		return 0.0;
		if (x <= 4.0)		return 1.0 + (0.0 - 1.0) * ((x - 0.0) / (4.0 - 0.0));
	}

	membership_tip_average(x) {
		if (x <= 10.0)		return 0.0;
		if (x > 20.0)		return 0.0;
		if (x <= 15.0)		return 0.0 + (1.0 - 0.0) * ((x - 10.0) / (15.0 - 10.0));
		if (x <= 20.0)		return 1.0 + (0.0 - 1.0) * ((x - 15.0) / (20.0 - 15.0));
	}

	membership_tip_cheap(x) {
		if (x <= 0.0)		return 0.0;
		if (x > 10.0)		return 0.0;
		if (x <= 5.0)		return 0.0 + (1.0 - 0.0) * ((x - 0.0) / (5.0 - 0.0));
		if (x <= 10.0)		return 1.0 + (0.0 - 1.0) * ((x - 5.0) / (10.0 - 5.0));
	}

	membership_tip_generous(x) {
		if (x <= 20.0)		return 0.0;
		if (x > 30.0)		return 0.0;
		if (x <= 25.0)		return 0.0 + (1.0 - 0.0) * ((x - 20.0) / (25.0 - 20.0));
		if (x <= 30.0)		return 1.0 + (0.0 - 1.0) * ((x - 25.0) / (30.0 - 25.0));
	}


	// Print 
	print() {
		console.log("Function block tipper:\n");
		console.log("	Input  %s: %f\n", "food" , this.food);
		console.log("	       %s: %f\n", "food_delicious" , this.food_delicious);
		console.log("	       %s: %f\n", "food_rancid" , this.food_rancid);
		console.log("	Input  %s: %f\n", "service" , this.service);
		console.log("	       %s: %f\n", "service_excellent" , this.service_excellent);
		console.log("	       %s: %f\n", "service_good" , this.service_good);
		console.log("	       %s: %f\n", "service_poor" , this.service_poor);
		console.log("	Output %s: %f\n", "tip" , this.tip);
	}

	// Reset output
	reset() {
		for (let i = 0 ; i < 1000; i++) {
			this.defuzzify_tip[i] = 0.0;
		}
	}

};

function main(food, service) {
	// Create function blocks
	const tipper = new FunctionBlock_tipper();

	// Parse input
	tipper.food = food;
	tipper.service = service;

	// Calculate
	tipper.calc();

	// Show results
	tipper.print();

	return [tipper.tip];
}