export class Train extends Vehicle implements ITrain {
  private readonly _carts: number;

  protected static _minCarts = 1;

  protected static _maxCarts = 15;

  protected static _minCapacity: number = 30;

  protected static _maxCapacity: number = 150;


  constructor(passengerCapacity: number, pricePerKilometer: number, carts: number){
    super(passengerCapacity, pricePerKilometer, VehicleType.Land);
    if (passengerCapacity < Train._minCapacity || passengerCapacity > Train._maxCapacity) {
      throw new Error (`A train cannot have less than ${Train._minCapacity} passengers or more than ${Train._maxCapacity} passengers.`)
    }
    if(carts < Train._minCarts || carts > Train._maxCarts ){
      throw new Error (`A train cannot have less than ${Train._minCarts} cart or more than ${Train._maxCarts} carts.`)
    }

    this._carts = carts;
  }

  public get carts () : number {
    return this._carts;
  }

  public print(): string {
    return 'Train ---- \n' + super.print() + `\n Carts amount: ${this.carts}`;
  }
}