orange_tree.rb

require 'byebug'

class Orange

  attr_reader :diameter
  # Initializes a new Orange with diameter +diameter+
  def initialize
    @diameter = rand(10)+1
  end
end

# This is how you define your own custom exception classes
class NoOrangesError < StandardError
end

class OrangeTree
attr_reader :height, :age
  def initialize
    @age = 1
    @height = 0
    @oranges = [] 
  end
  
  # Ages the tree one year
  def age!
    @age += 1
    @height += 1
    #add random amount(1-50) of orange to oranges array start from age 4
    if @age > 4
      (rand(50)+1).times do
        @oranges << Orange.new
      end
    end
  end

  # Returns +true+ if there are any oranges on the tree, +false+ otherwise
  def any_oranges?
    if @oranges.length > 0
      return true
    else
      return false
    end
  end

  # Returns an Orange if there are any
  # Raises a NoOrangesError otherwise
  def pick_an_orange!
    raise NoOrangesError, "This tree has no oranges" unless self.any_oranges?

    # orange-picking logic goes here
    return @oranges.shift
  end

  def dead?
  
    @age >= 15
  end

end

tree = OrangeTree.new

tree.age! until tree.any_oranges?

puts "Tree is #{tree.age} years old and #{tree.height} feet tall"
until tree.dead?
  basket = []

  # It places the oranges in the basket
  while tree.any_oranges?
    basket << tree.pick_an_orange!
  end
 
 # It's up to you to calculate the average diameter for this harvest.
  avg_diameter = 0 
  basket.each do |orange|
    avg_diameter += orange.diameter
  end
  avg_diameter /= basket.length

  puts "Year #{tree.age} Report"
  puts "Tree height: #{tree.height} feet"
  puts "Harvest: #{basket.size} oranges with an average diameter of #{avg_diameter} inches"

  # Age the tree another year
  tree.age!

end

puts "Alas, the tree, she is dead!"