import nconf from 'nconf';
import requireAgain from 'require-again';
import {
  generateRes,
  generateReq,
  generateNext,
} from '../../../helpers/api-unit.helper';

describe('maintenance mode middleware', () => {
  let res; let req; let
    next;
  const pathToMaintenanceModeMiddleware = '../../../../website/server/middlewares/maintenanceMode';

  beforeEach(() => {
    res = generateRes();
    next = generateNext();
  });

  it('does not return 503 error when maintenance mode is off', () => {
    req = generateReq();
    sandbox.stub(nconf, 'get').withArgs('MAINTENANCE_MODE').returns('false');
    const attachMaintenanceMode = requireAgain(pathToMaintenanceModeMiddleware).default;

    attachMaintenanceMode(req, res, next);

    expect(next).to.have.been.calledOnce;
    expect(res.status).to.not.have.been.called;
  });

  it('returns 503 error when maintenance mode is on', () => {
    req = generateReq();
    sandbox.stub(nconf, 'get').withArgs('MAINTENANCE_MODE').returns('true');
    const attachMaintenanceMode = requireAgain(pathToMaintenanceModeMiddleware).default;

    attachMaintenanceMode(req, res, next);

    expect(next).to.not.have.been.called;
    expect(res.status).to.have.been.calledOnce;
    expect(res.status).to.have.been.calledWith(503);
  });

  it('renders maintenance page when request type is HTML', () => {
    req = generateReq({ headers: { accept: 'text/html' } });
    sandbox.stub(nconf, 'get').withArgs('MAINTENANCE_MODE').returns('true');
    const attachMaintenanceMode = requireAgain(pathToMaintenanceModeMiddleware).default;

    attachMaintenanceMode(req, res, next);
    expect(res.render).to.have.been.calledOnce;
  });

  it('sends error message when request type is JSON', () => {
    req = generateReq({ headers: { accept: 'application/json' } });
    sandbox.stub(nconf, 'get').withArgs('MAINTENANCE_MODE').returns('true');
    const attachMaintenanceMode = requireAgain(pathToMaintenanceModeMiddleware).default;

    attachMaintenanceMode(req, res, next);
    expect(res.send).to.have.been.calledOnce;
  });
});