import { PropertyQuestionsService, PropertyQuestion, isEligibilityStatus, isQuestion } from './PropertyQuestionsService';
import { UserDataState } from '../state/UserDataState';
import { expect } from 'chai';

describe('Property questions service', () => {
  let userDataState: UserDataState;
  let service: PropertyQuestionsService;

  beforeEach(() => {
    userDataState = {} as UserDataState;
    service = new PropertyQuestionsService(userDataState);
  });

  it('should return the meters question for dual fuel', () => {
    userDataState.fuel = 'Dual';
    expect(service.getFirstUnansweredQuestion()).to.have.property('id', 'MetersDiffFloor');
  });

  it('should return the storage heaters question for electricity', () => {
    userDataState.fuel = 'Electricity';
    expect(service.getFirstUnansweredQuestion()).to.have.property('id', 'StorageHeaters');
  });

  it('should return the first unanswered question', () => {
    userDataState.fuel = 'Dual';
    userDataState.metersDiffFloor = 'No';
    expect(service.getFirstUnansweredQuestion()).to.have.property('id', 'GasBrownBox');
  });

  it('should set the answer and get the next question', () => {
    userDataState.fuel = 'Dual';
    const firstQuestion = service.getFirstUnansweredQuestion() as PropertyQuestion;
    const nextQuestion = service.setAnswer(firstQuestion, "Yes");
    expect(nextQuestion).to.have.property('id', 'InFlat');
  });

  it('should set the answer and get the eligibility status', () => {
    userDataState.fuel = 'Electricity';
    const firstQuestion = service.getFirstUnansweredQuestion() as PropertyQuestion;
    expect(service.setAnswer(firstQuestion, 'Yes')).to.equal('PropertyNotEligible');
  });

  it('should return status if all the questions have been answered', () => {
    userDataState.fuel = 'Electricity';
    userDataState.storageHeaters = 'Yes';
    expect(service.getEligibilityStatus()).to.equal('PropertyNotEligible');
  });

  it('should return status undefined if the questions have not all been answered', () => {
    userDataState.fuel = 'Dual';
    expect(service.getEligibilityStatus()).to.be.undefined;
  });

  it('should check if a tree node is a question', () => {
    userDataState.fuel = 'Dual';
    expect(isQuestion(service.getFirstUnansweredQuestion())).to.be.true;
  });

  it('should check if a tree node is an eligibility status', () => {
    userDataState.fuel = 'Electricity';
    userDataState.storageHeaters = 'Yes';
    expect(isQuestion(service.getFirstUnansweredQuestion())).to.be.false;
  });
});