//OUTPUT: An instance of DOG. An object with properties
// const dog = {
// name: 'Scout',
// breed: ['Husky', 'German Shepherd'],
// age: 4,
// happiness: 50,
// hunger: 10,
// energy: 100,
// };


//functional class?
var Dog = function(dogName, breed, age) {
  var dogObj = {};
  dogObj.dogName = dogName;
  dogObj.breed = breed;
  dogObj.age = age;
  dogObj.happiness = statGen();
  dogObj.hunger = statGen();
  dogObj.energy = statGen();
  extend(dogObj, Dog.methods);
  return dogObj;
}

//generates a number rating ranging from 0-100
var statGen = function() {
	return Math.floor(Math.random() * 101);
}

var extend = function (obj1, obj2) {
  for (var key in obj2) {
      obj1[key] = obj2[key];
  }
}

Dog.methods = {
//method of dog called feed
	feed: function (food) {
	if(this.hunger - food > 0) {
	  this.hunger -= food;
	} else {
	  this.hunger = 0;
	}
	},

	//method of dog called play
	play: function(time) {
	if(this.happiness + time < 100) {
	  this.happiness += time;
	} else {
	  this.happiness = 100;
	}

	if(this.energy - time > 0) {
	  this.energy -= time;
	} else {
	  this.energy = 0;
	}
	},

	//method of dog called nap
	nap :function(time) {
	if(this.energy + time < 100) {
	  this.energy += time;
	} else {
	  this.energy = 100;
	}
	}

}

Dog("Coco", ["husky", "corgi"], 2);