viking.js

// Soldier
class Soldier {
  constructor (health, strength){
    this.health = health;
    this.strength = strength;
  }

  attack() {
    return this.strength;
  }

  receiveDamage(damage) {
    this.health -= damage;
  }
}

// Viking
class Viking extends Soldier {
  constructor (name, health, strength) {
    super (health, strength);
    this.name = name;
  }

  receiveDamage(damage) {
    this.health -= damage;
    if (this.health > 0) {
      return `${this.name} has recieved ${damage} points of damage.`;
    }
    else {
      return `${this.name} has died in act of combat`;
    }
  }

  battleCry() {
    return 'Odin Owns You All!'
  }
}

// Saxon
class Saxon extends Soldier {
  constructor (health, strength, name) {
    super(health, strength);
    this.name = name;
  }

  receiveDamage(damage) {
    this.health -= damage;
    if (this.health > 0) {
      return `${this.name} has recieved ${damage} points of damage.`;
    }
    else {
      return `${this.name} has died in combat`;
    }
  }
}

// War
class War {
  constructor() {
    this.vikingArmy = [];
    this.saxonArmy = [];
  }

  addViking(viking) {
    this.vikingArmy.push(viking);
  }

  addSaxon(saxon) {
    this.saxonArmy.push(saxon);
  }

  vikingAttack() {
    const randomSaxon = this.saxonArmy[Math.floor(Math.random() * this.saxonArmy.length)];
    const randomViking = this.vikingArmy[Math.floor(Math.random() * this.vikingArmy.length)];

    const result = randomSaxon.receiveDamage(randomViking.attack());

    if (randomSaxon.health <= 0) {
      this.saxonArmy = this.saxonArmy.filter(saxon.health > 0);
    }
    return result;
  }

  saxonAttack() {
    const randomSaxon = this.saxonArmy[Math.floor(Math.random() * this.saxonArmy.length)];
    const randomViking = this.vikingArmy[Math.floor(Math.random() * this.vikingArmy.length)];

    const result = randomViking.receiveDamage(randomSaxon.attack());

    if (randomViking.health <= 0) {
      this.vikingArmy = this.vikingArmy.filter(viking.health > 0);
    }
    return result;
  }

  showStatus() {
    if (this.vikingArmy.length === 0 && this.saxonArmy.length >= 1) {
      return "Saxons have fought for their lives and survived another day...";
    }

    else if (this.saxonArmy.length === 0 && this.vikingArmy.length >=1) {
      return "Vikings have won the war of the Century!";
    }

    else {
      return "Vikings and Saxons are still in the thick of battle."
    }
  }
}



// The following is required to make unit tests work.
/* Environment setup. Do not modify the below code. */
if (typeof module !== 'undefined') {
  module.exports = { Soldier, Viking, Saxon, War };
}