#!/usr/bin/env python
# -*- coding: utf-8 -*-
# java2python -> top-level package marker.
public class RegularPolygon {
 
    // Declare and initialize default values.
    private int n       = 3;
    private double side = 1.0;
    private double x    = 0.0;
    private double y    = 0.0;
 
        // Create constructor with default values.
        public RegularPolygon(){
 
        }
 
        // Create constructor with new n and side values.
        public RegularPolygon(int n, double side){          
            this.n      = n;
            this.side   = side;
            this.x      = 0;
            this.y      = 0;
        }
 
        // Create constructor with new n, side, x, and y values.
        public RegularPolygon(int n, double side, double x, double y){  
            this.n      = n;
            this.side   = side;
            this.x      = x;
            this.y      = y;    
        }
 
        // get n method
        public int getN(){
            return this.n;
        }
 
        // set n method.
        public void setN(int n){
            this.n  = n;
        }
 
        // get side method.
        public double getSide(){
            return this.side;
        }
 
        // set side method.
        public void setSide(double side){
            this.side = side;
        }
 
        // get x-coordinate method.
        public double getX(){
            return this.x;
        }
 
        // set x-coordinate method.
        public void setX(double x){
            this.x  = x;    
        }
 
        // get y-coordinate method.
        public double getY(){
            return this.y;
        }
 
        // set y-coordinate method.
        public void setY(double y){
            this.y  = y;
        }
 
        // Calculate Perimeter.
        public double getPerimeter(){
            return this.n * this.side;
        }
 
        // Calculate Area.
        public double getArea(){
            return (this.n * Math.pow(this.side,2)) / (4 * Math.tan(Math.PI/this.n));
        }
 
        // Pepresentation method of RegularPolygon object.
        public String toString(){
            String result;
            if(this.n >= 3 && this.side > 0){
                result = "The Regular Polygon n: " + this.n + ", side: "+ this.side + ", Area: " + this.getArea() + ", Perimeter: " + this.getPerimeter();
            }else if(this.n >= 3 && this.side <= 0){
                result = "The side length must be greater than zero.";
            }else if(this.n < 3 && this.side > 0){
                result = "The number of edges must be greater than three.";
            }else{
                result = "The side length must be greater than zero and the number of edges must be greater than three.";
            }
            return result;
        }
 
} // End of RegularPolygon class.