const animalType =
{
    NONE : "none",
    PONEY : "poney",
    LION : "lion",
    KOALA : "koala",
    HUMAN : "human"
}

const legsCountByAnimalType = {
    [animalType.NONE] : 0,
    [animalType.PONEY] : 4,
    [animalType.LION] : 4,
    [animalType.KOALA] : 2,
    [animalType.HUMAN] : 2
};

class Animal
{
    running = false;
    legsCount = 0;
    type = animalType.NONE;
    getLegsCount()
    {
        return (this.legsCount);
    }
    run()
    {
        this.running = true;
    }
    loseOneLeg()
    {
        this.legsCount--;
        if (this.legsCount < 0)
        {
            this.legsCount = 0;
        }
    }
    cureAllLegs()
    {
        this.legsCount = legsCountByAnimalType[this.type];
    }
    constructor(aParameterNamedTypeSomehow, running = false)
    {
        this.type = aParameterNamedTypeSomehow;
        this.legsCount = legsCountByAnimalType[this.type];
        this.running = running;
    }

}

const someLion = new Animal(animalType.LION);

const someRunningLionUsingTheOptionnalParameter = new Animal(animalType.LION, true);

console.log("how many legs have the lion??? \n" + someLion.getLegsCount());

console.log("is the first lion running? \n" + someLion.running);
console.log("is the second lion running? \n" + someRunningLionUsingTheOptionnalParameter.running);

// Ah! lets make the first lion run as well!

someLion.run();

console.log("is the first lion running now please??? i want him to run! \n"  + someLion.running);


const someKoala = new Animal(animalType.KOALA);

console.log("how many legs have my koala?\n" + someKoala.getLegsCount());

// lets remove one leg from the koala he has been bitten by a spider

someKoala.loseOneLeg();

// please cure the koala!!! he is in danger in the wild!

// add code to cure the koala after this line!