# Define Music:
# Vocal or instrumental sounds (or both) combined in such a way as to produce beauty of form, harmony, and expression of emotion.


class Music
  has_many :sounds
  has_many :notes , through: :sounds
  sequences_of_emotions = []
  
  def good user
    sequences_of_emotions.select { |e| e == user.definition_of(Music, :good) }
  end
end

class Sound
  has_many :notes
end


class Note
  has_many :sequences
end


class Vocal < Sound
end

class User
  DEFINITIONS = {
    music: {
      good: []
    }
  }
  def definition_of klass, type
    DEFINITIONS[klass.downcase][type]
  end
end

# a user can say:
#
# Play some good music
#
# 1. play = action the computer has to execute
# 2. some = the range
# 3. good = a selection based on the user for the object(music)
# 4. music = the subject



# the only hard to explain here is the "good" because the good based on the expectation we want.
# what is good music? and what is good in general?

# good: to be desired or approved of.

# So we should define what is good for us based on the previus examples
# How can u define good? what music is do so will do "good" to me?
  
# IF: i accept these type of sequences and i will hear them it is good for me