import React from 'react';
import ReactDOM from 'react-dom';
import { Simulate, findRenderedDOMComponentWithClass } from 'react-dom/test-utils';

import { DateUtils } from 'mailspring-exports';
import DateInput from '../../src/components/date-input';
import { renderIntoDocument } from '../mailspring-test-utils';

const { findDOMNode } = ReactDOM;

const makeInput = (props = {}) => {
  const input = renderIntoDocument(<DateInput {...props} dateFormat="blah" />);
  if (props.initialState) {
    input.setState(props.initialState);
  }
  return input;
};

describe('DateInput', function dateInput() {
  describe('onInputKeyDown', () => {
    it('should submit the input if Enter or Escape pressed', () => {
      const onDateSubmitted = jasmine.createSpy('onDateSubmitted');
      const component = makeInput({ onDateSubmitted: onDateSubmitted });
      const inputNode = ReactDOM.findDOMNode(component).querySelector('input');
      const stopPropagation = jasmine.createSpy('stopPropagation');
      const keys = ['Enter', 'Return'];
      inputNode.value = 'tomorrow';
      spyOn(DateUtils, 'futureDateFromString').andReturn('someday');

      keys.forEach(key => {
        Simulate.keyDown(inputNode, { key, stopPropagation });
        expect(stopPropagation).toHaveBeenCalled();
        expect(onDateSubmitted).toHaveBeenCalledWith('someday', 'tomorrow');
        stopPropagation.reset();
        onDateSubmitted.reset();
      });
    });
  });

  describe('render', () => {
    beforeEach(() => {
      spyOn(DateUtils, 'format').andReturn('formatted');
    });

    it('should render a date interpretation if a date has been inputted', () => {
      const component = makeInput({ initialState: { inputDate: 'something!' } });
      spyOn(component, 'setState');
      const dateInterpretation = findDOMNode(
        findRenderedDOMComponentWithClass(component, 'date-interpretation')
      );

      expect(dateInterpretation.textContent).toEqual('formatted');
    });

    it('should not render a date interpretation if no input date available', () => {
      const component = makeInput({ initialState: { inputDate: null } });
      spyOn(component, 'setState');
      expect(() => {
        findRenderedDOMComponentWithClass(component, 'date-interpretation');
      }).toThrow();
    });
  });
});