function isHexaDecimal(hexaNumber){
    if (hexaNumber.length===7&&hexaNumber.match(/#[a-f0-9A-F]{6}/)){
        return true
    }else{
        return false
    }
}
function isPositiveNumber(number,_weakmapValue){
    if (typeof number==='number'&&number>=0){
        _weakmapValue.set(this,number)
    }else{
        throw Error(`${number} must be positive Number`)
    }
}
const _color=new WeakMap()
const _x1=new WeakMap()
const _y1=new WeakMap()
const _x2=new WeakMap()
const _y2=new WeakMap()
const _x3=new WeakMap()
const _y3=new WeakMap()
const _radius=new WeakMap()
const _width=new WeakMap()
const _heigth=new WeakMap()


class Shape{
    constructor(x1,y1,color){
        isPositiveNumber.call(this,x1,_x1);
        isPositiveNumber.call(this,y1,_y1);

        if (isHexaDecimal(color)){
             _color.set(this,color)
        }else{
            throw Error('Color must be in Hexadecimal format')
        }

    }

    set color(value) {
        if (isHexaDecimal(value)){
            _color.set(this,value);
        }else{
            throw Error('Color must be in Hexadecimal format')
        }
    }
    get color(){
        return _color.get(this)
    }
    draw(){
        console.log('Waiting to draw')
    }
    set x1(value){
        isPositiveNumber(value,_x1);
    }
    get x1(){
        return _x1.get(this)
    }
    set y1(value){
        isPositiveNumber(value,_y1);
    }
    get y1(){
        return _y1.get(this)
    }


}
class Circle extends Shape{

    constructor(x1,y1,color,radius){
        super(x1,y1,color)
        isPositiveNumber.call(this,radius,_radius);
    }
    set radius(value){
        isPositiveNumber.call(this,value,_radius);
    }
    get radius(){
        return _radius.get(this)
    }
}
Circle.prototype.draw=function(ctx){
    ctx.beginPath();
    ctx.arc(this.x1, this.y1, this.radius, 0, 2 * Math.PI);
    ctx.fillStyle = this.color;
    ctx.fill();
}