solution.rb

# Please copy/paste all three classes into this file to submit your solution!
class Movie
  attr_accessor :title

  @@all = []

  def initialize(title)
    self.title = title
    @@all << self
  end

  def self.all
    @@all
  end

  def self.find_by_title(title)
    all.find do |movie|
      movie.title.downcase == title.downcase
    end
  end

  def ratings
    Rating.all.select do |rating|
      rating.movie == self
    end
  end

  def viewers
    self.ratings.map do |rating|
      rating.viewer
    end
  end

  def average_rating
    # i = 0
    # self.ratings.each do |rating|
    #   i += rating.score
    # end
    # i / self.ratings.length.to_f

    self.ratings.reduce(0.0) do |sum, rating|
      sum + rating.score
    end / self.ratings.length

  end
end

class Rating
  attr_accessor :score, :viewer, :movie

  @@all = []

  def initialize(score, movie, viewer)
    @score = score
    @viewer = viewer
    @movie = movie
    @@all << self
  end

  def self.all
    @@all
  end

end

class Viewer
  attr_accessor :first_name, :last_name, :full_name

  @@all = []

  def initialize(name)
    @full_name = name
    @first_name, @last_name = name.split(" ")
    @@all << self
  end

  def self.all
    @@all
  end

  def self.find_by_name(name)
    all.find do |viewer|
      viewer.full_name.downcase == name.downcase
    end
  end

  # def create_rating(score, movie)
  #   Rating.new(score, movie, self)
  # end

  def create_rating(score, movie)
    if movie.class == Fixnum
      i = movie
      movie = score
      score = i
    end
    if movie.class == String
      movie = Movie.new(movie)
    end
    if !!Movie.find_by_title(movie.title)
      Movie.new("#{movie.title}")
    end

    Rating.new(score, movie, self)
  end


end

# sammy = Viewer.new("Sammy Steiner")
# scott = Viewer.new("Scott Harrison")
# film1 = Movie.new("Star Wars")
# film2 = Movie.new("Star Trek")
# sammy.create_rating(4, film1)
# sammy.create_rating(1, film2)
# scott.create_rating(5, film1)
# scott.create_rating(film2, 3)
# sammy.create_rating(3, "all I got is a name")
# sammy.create_rating(4, Movie.new("foreign film"))