raen79/tutor_chatbot

class QuestionMailer < ApplicationMailer
  def ask_lecturer(student_question)
    @student_question = student_question
    lecturer = User.find_by(:lecturer_id => student_question.lecturer_id)

    mail(
      :from => ENV['GM_USER'],
      :to => lecturer.email,
      :subject => "SQ##{student_question.id} | Tutor Chatbot Has a New Question for You"
    )
  end

  def receive_answer(subject, from, lecturer_reply)
    student_question = find_student_question_by_subject(subject)
    student = User.find_by(:student_id => student_question.student_id)

    @faq = student_question.answer(lecturer_reply)

    mail(
      :from => ENV['GM_USER'],
      :to => student.email,
      :reply_to => from,
      :subject => "SQ##{student_question.id} | Your tutor has replied to your question"
    )
  end

  def self.receive_answers
    Mail.all.map do |mail|
      if mail.multipart?
        @lecturer_reply = mail.parts.find{ |part| part.content_type == 'text/plain; charset=UTF-8' }.body.decoded.lines.first
      else
        @lecturer_reply = mail.decoded
      end

      QuestionMailer.receive_answer(mail.subject, mail.from, @lecturer_reply)
    end
  end

  private
    def find_student_question_by_subject(subject)
      student_question_id = subject[/SQ#(.*?) \| /, 1].to_i
      StudentQuestion.find(student_question_id)
    end
end