const invalidValueError = new Error('Invalid value');

export default class BMI {
  constructor(private _weight: number, private _height: number) {
  }
  
  public set height(height: number) {
    if (height <= 0)
      console.error(invalidValueError);

    this._height = height;
  }
  
  public set width(weight: number) {
    if (weight <= 0)
      console.error(invalidValueError);

    this._weight = weight;
  }
  
  public get bmi(): number {
    return +(this._weight / this._height ** 2).toFixed(2);
  }
  
  public calculateBMI(): string {
    return `there is ${this.bmi < 25 ? 'no ' : ''}excess weight`;
  }
}