class Decidim::Meetings::Admin::UpdateQuestionnaire

def call
  return broadcast(:invalid) if @form.invalid?
  Decidim.traceability.perform_action!("update", Decidim::Meetings::Questionnaire, @form.current_user, { meeting: @questionnaire.questionnaire_for.try(:meeting) }) do
    Decidim::Meetings::Questionnaire.transaction do
      create_questionnaire_for
      create_questionaire
      if @questionnaire.questions_editable?
        update_questionnaire_questions
        delete_answers
      end
      @questionnaire
    end
  end
  broadcast(:ok)
end

def create_questionaire
  @questionnaire.save! if @questionnaire.new_record?
end

def create_questionnaire_for
  @questionnaire.questionnaire_for.save! if @questionnaire.questionnaire_for.new_record?
end

def delete_answers
  @questionnaire.answers.destroy_all
end

def initialize(form, questionnaire)
  @form = form
  @questionnaire = questionnaire
end

def update_nested_model(form, attributes, parent_association)
  record = parent_association.find_by(id: form.id) || parent_association.build(attributes)
  yield record if block_given?
  if record.persisted?
    if form.deleted?
      record.destroy!
    else
      record.update!(attributes)
    end
  else
    record.save!
  end
end

def update_questionnaire_question(form_question)
  question_attributes = {
    body: form_question.body,
    position: form_question.position,
    question_type: form_question.question_type,
    max_choices: form_question.max_choices
  }
  update_nested_model(form_question, question_attributes, @questionnaire.questions) do |question|
    form_question.answer_options.each do |form_answer_option|
      answer_option_attributes = {
        body: form_answer_option.body
      }
      update_nested_model(form_answer_option, answer_option_attributes, question.answer_options)
    end
  end
end

def update_questionnaire_questions
  @form.questions.each do |form_question|
    update_questionnaire_question(form_question)
  end
end