lab-vikings-possible-solution.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); // Call the constructor of class we are extending
    this.name = name;
  }

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

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

// Saxon
class Saxon extends Soldier {
  receiveDamage(damage) {
    this.health -= damage;
    if (this.health > 0) {
      return `A Saxon has received ${damage} points of damage`;
    } else {
      return `A Saxon has died in combat`;
    }
  }
}

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

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

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

  // genericAttack(attackingArmy, defendingArmy) {
  //   const indexDefender = Math.floor(Math.random() * defendingArmy.length);

  //   const attacker = attackingArmy[Math.floor(Math.random() * attackingArmy.length)];
  //   const defender = defendingArmy[indexDefender];

  //   const message = defender.receiveDamage(attacker.strength);

  //   if (defender.health <= 0) {
  //     defendingArmy.splice(indexDefender, 1);
  //   }

  //   return message;
  // }

  vikingAttack() {
    // this.genericAttack(this.vikingArmy, this.saxonArmy);
    const indexSaxon = Math.floor(Math.random() * this.saxonArmy.length);

    const saxon = this.saxonArmy[indexSaxon];
    const viking = this.vikingArmy[
      Math.floor(Math.random() * this.vikingArmy.length)
    ];

    const message = saxon.receiveDamage(viking.strength);

    if (saxon.health <= 0) {
      this.saxonArmy.splice(indexSaxon, 1);
    }

    return message;
  }

  saxonAttack() {
    // return this.genericAttack(this.saxonArmy, this.vikingArmy);
    const saxon = this.saxonArmy[
      Math.floor(Math.random() * this.saxonArmy.length)
    ];
    const viking = this.vikingArmy[
      Math.floor(Math.random() * this.vikingArmy.length)
    ];

    const message = viking.receiveDamage(saxon.strength);

    this.vikingArmy = this.vikingArmy.filter((viking) => {
      return viking.health > 0;
    });

    return message;
  }

  showStatus() {
    if (!this.saxonArmy.length) {
      return 'Vikings have won the war of the century!';
    } else if (!this.vikingArmy.length) {
      return 'Saxons have fought for their lives and survived another day...';
    } else {
      return 'Vikings and Saxons are still in the thick of battle.';
    }
  }
}
// The following is required to make unit tests work. Please ignore it.
if (typeof module !== 'undefined') {
  module.exports = { Soldier, Viking, Saxon, War };
}