class AnswerQuestion
  include Interactor

  def call
    if not game
      context.fail!(message: 'Game is not started', code: 403)
    elsif question_in_round_session?
      context.fail!(message: 'Question answered', code: 403)
    else
      questions << question
      if update_game_attributes
        context.right = answer_right?
        context.comment = question.comment
        context.answers = question.answers
      else
        context.fail!(message: game.errors, code: 422)
      end
    end
  end

  private

  def question_in_round_session?
    questions.include?(question)
  end

  def answer_right?
    answers.sort == question.answers.sort
  end

  def update_game_attributes
    if answer_right?
      game.increment!(:right_answers)
    else
      game.increment!(:wrong_answers)
    end

    game.increment!(:questions_number)
    game.score += question.category.cost

    game.save
  end

  def game
    @game ||= context.user.games.where(ended_at: nil).first
  end

  def answers
    _answers = context.answers
    @answers ||= if _answers.is_a?(String) then JSON.parse _answers else _answers end
  end

  def questions
    @questions ||= game.round_sessions.last.questions
  end

  def question
    @question ||= Question.find(context.question_id)
  end
end