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require 'twilio-ruby'
require 'sanitize'

class TwilioController < ApplicationController

  def ivr_welcome
    response = Twilio::TwiML::VoiceResponse.new do |r|
      phrase = "Welcome, Please Enter Survey Number"
      r.say(phrase, voice: 'alice', language: 'en-GB')
      gather = Twilio::TwiML::Gather.new(num_digits: '1', action: ivr_survey_path)
      r.append(gather)
    end
    render xml: response.to_s
  end

  def survey
    survey_id = params[:Digits]
    @survey = Survey.find_by(id: survey_id)
    if @survey.present?
      session[params[:Caller]] = {}
      questions = @survey.questions.unanswered
      phrase = "All the questions will be asked one bye one, Please punch in your response"
      questions.each do |question|
      	session[params[:Caller]][question.id] = question.question
      end
      response = Twilio::TwiML::VoiceResponse.new do |r|
        r.say(phrase, voice: 'alice', language: 'en-GB')
        r.redirect(ivr_questions_path)
      end
    else
      phrase = "We can't find any survey with given number, Goodbye"
      return twiml_say_and_hangup(phrase)
    end
    render xml: response.to_s
  end

  
  def questions
    questions = session[params[:Caller]]
    if questions.present? && questions.count > 0
      question = questions.first
      message = "#{question[1]}. Press 1 for yes, Press 2 for 'no'"
      response = Twilio::TwiML::VoiceResponse.new do |r|
        gather = Twilio::TwiML::Gather.new(num_digits: '1', action: ivr_answer_path(question_id: question[0]))
        gather.say(message, voice: 'alice', language: 'en-GB', loop: 10)
        r.append(gather)
      end
    else
      phrase = "Thank you, The survey has been ended, Goodbye."
      reset_session
      return twiml_say_and_hangup(phrase)
    end
    render xml: response.to_s
  end

  def answer
    question = Question.find_by(id: params[:question_id])
    case params[:Digits]
      when '1'
        question.yes!
        session[params[:Caller]].delete(question.id.to_s)
      when '2'
        question.no!
        session[params[:Caller]].delete(question.id.to_s)
      else
      message = "Please Enter Valid Input"
    end
    response = Twilio::TwiML::VoiceResponse.new do |r|
      r.redirect(ivr_questions_path)
    end
    render xml: response.to_s
  end

  end

  private

  def twiml_say_and_hangup(phrase)
    response = Twilio::TwiML::VoiceResponse.new do |r|
      r.say(phrase, voice: 'alice', language: 'en-GB')
      r.hangup
    end
    render xml: response.to_s
  end
end