require 'rails_helper'

describe SurveyResponsesDataLoader do
  let(:path_to_teacher_responses) { Rails.root.join('spec', 'fixtures', 'test_2020-21_teacher_survey_responses.csv') }
  let(:path_to_student_responses) { Rails.root.join('spec', 'fixtures', 'test_2020-21_student_survey_responses.csv') }

  let(:ay_2020_21) { AcademicYear.find_by_range '2020-21' }

  let(:attleboro_high_school) { School.find_by_slug 'attleboro-high-school' }
  let(:butler_middle_school) { School.find_by_slug 'butler-middle-school' }

  let(:t_pcom_q3) { SurveyItem.find_by_survey_item_id 't-pcom-q3' }
  let(:t_pcom_q2) { SurveyItem.find_by_survey_item_id 't-pcom-q2' }
  let(:s_phys_q1) { SurveyItem.find_by_survey_item_id 's-phys-q1' }
  let(:s_phys_q2) { SurveyItem.find_by_survey_item_id 's-phys-q2' }

  describe 'self.load_data' do
    context 'loading teacher survey responses' do
      before :each do
        SurveyResponsesDataLoader.load_data filepath: path_to_teacher_responses
      end

      it 'assigns the academic year to the survey item responses' do
        expect(SurveyItemResponse.find_by_response_id('teacher_survey_response_1').academic_year).to eq ay_2020_21
      end

      it 'assigns the school to the survey item responses' do
        expect(SurveyItemResponse.find_by_response_id('teacher_survey_response_1').school).to eq attleboro_high_school
      end

      it 'loads all the survey item responses for a given survey response' do
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_1').count).to eq 5
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_2').count).to eq 0
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_3').count).to eq 69
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_4').count).to eq 69
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_5').count).to eq 69
      end

      it 'loads all the survey item responses for a given survey item' do
        expect(SurveyItemResponse.where(survey_item: t_pcom_q2).count).to eq 3
        expect(SurveyItemResponse.where(survey_item: t_pcom_q3).count).to eq 4
      end

      it 'captures the likert scores for the survey item responses' do
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_1').where(survey_item: t_pcom_q2)).to be_empty
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_1').where(survey_item: t_pcom_q3).first.likert_score).to eq 3

        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_2').where(survey_item: t_pcom_q2)).to be_empty
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_2').where(survey_item: t_pcom_q3)).to be_empty

        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_3').where(survey_item: t_pcom_q2).first.likert_score).to eq 5
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_3').where(survey_item: t_pcom_q3).first.likert_score).to eq 5

        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_4').where(survey_item: t_pcom_q2).first.likert_score).to eq 4
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_4').where(survey_item: t_pcom_q3).first.likert_score).to eq 4

        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_5').where(survey_item: t_pcom_q2).first.likert_score).to eq 2
        expect(SurveyItemResponse.where(response_id: 'teacher_survey_response_5').where(survey_item: t_pcom_q3).first.likert_score).to eq 4
      end

      it 'is idempotent, i.e. loading the data a second time does not duplicate survey item responses' do
        number_of_survey_item_responses = SurveyItemResponse.count

        SurveyResponsesDataLoader.load_data filepath: path_to_teacher_responses

        expect(SurveyItemResponse.count).to eq number_of_survey_item_responses
      end
    end

    context 'student survey responses' do
      before :each do
        SurveyResponsesDataLoader.load_data filepath: path_to_student_responses
      end

      it 'assigns the academic year to the survey item responses' do
        expect(SurveyItemResponse.find_by_response_id('student_survey_response_3').academic_year).to eq ay_2020_21
      end

      it 'assigns the school to the survey item responses' do
        expect(SurveyItemResponse.find_by_response_id('student_survey_response_3').school).to eq butler_middle_school
      end

      it 'loads all the survey item responses for a given survey response' do
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_1').count).to eq 2
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_2').count).to eq 0
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_3').count).to eq 25
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_4').count).to eq 22
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_5').count).to eq 27
      end

      it 'loads all the survey item responses for a given survey item' do
        expect(SurveyItemResponse.where(survey_item: s_phys_q1).count).to eq 3
        expect(SurveyItemResponse.where(survey_item: s_phys_q2).count).to eq 3
      end

      it 'captures the likert scores for the survey item responses' do
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_1').where(survey_item: s_phys_q1)).to be_empty
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_1').where(survey_item: s_phys_q2)).to be_empty

        expect(SurveyItemResponse.where(response_id: 'student_survey_response_2').where(survey_item: s_phys_q1)).to be_empty
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_2').where(survey_item: s_phys_q2)).to be_empty

        expect(SurveyItemResponse.where(response_id: 'student_survey_response_3').where(survey_item: s_phys_q1).first.likert_score).to eq 1
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_3').where(survey_item: s_phys_q2).first.likert_score).to eq 3

        expect(SurveyItemResponse.where(response_id: 'student_survey_response_4').where(survey_item: s_phys_q1).first.likert_score).to eq 1
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_4').where(survey_item: s_phys_q2).first.likert_score).to eq 1

        expect(SurveyItemResponse.where(response_id: 'student_survey_response_5').where(survey_item: s_phys_q1).first.likert_score).to eq 1
        expect(SurveyItemResponse.where(response_id: 'student_survey_response_5').where(survey_item: s_phys_q2).first.likert_score).to eq 2
      end

      it 'is idempotent, i.e. loading the data a second time does not duplicate survey item responses' do
        number_of_survey_item_responses = SurveyItemResponse.count

        SurveyResponsesDataLoader.load_data filepath: path_to_student_responses

        expect(SurveyItemResponse.count).to eq number_of_survey_item_responses
      end
    end
  end
end
