import React from 'react';
import { shallow } from 'enzyme';
import { keys, range, values } from 'ramda';
import SortableBarGraph from '../../src/visits/SortableBarGraph';
import GraphCard from '../../src/visits/GraphCard';
import SortingDropdown from '../../src/utils/SortingDropdown';
import PaginationDropdown from '../../src/utils/PaginationDropdown';
import { rangeOf } from '../../src/utils/utils';

describe('<SortableBarGraph />', () => {
  let wrapper;
  const sortingItems = {
    name: 'Name',
    amount: 'Amount',
  };
  const stats = {
    Foo: 100,
    Bar: 50,
  };
  const createWrapper = (withPagination = false, extraStats = {}) => {
    wrapper = shallow(
      <SortableBarGraph
        title="Foo"
        stats={{ ...stats, ...extraStats }}
        sortingItems={sortingItems}
        withPagination={withPagination}
      />
    );

    return wrapper;
  };

  afterEach(() => wrapper && wrapper.unmount());

  it('renders stats unchanged when no ordering is set', () => {
    const wrapper = createWrapper();
    const graphCard = wrapper.find(GraphCard);

    expect(graphCard.prop('stats')).toEqual(stats);
  });

  describe('renders properly ordered stats when ordering is set', () => {
    let assert;

    beforeEach(() => {
      const wrapper = createWrapper();
      const dropdown = wrapper.renderProp('title')().find(SortingDropdown);

      assert = (sortName, sortDir, expectedKeys, expectedValues, done) => {
        dropdown.prop('onChange')(sortName, sortDir);
        setImmediate(() => {
          const stats = wrapper.find(GraphCard).prop('stats');

          expect(keys(stats)).toEqual(expectedKeys);
          expect(values(stats)).toEqual(expectedValues);
          done();
        });
      };
    });

    it('name - ASC', (done) => assert('name', 'ASC', [ 'Bar', 'Foo' ], [ 50, 100 ], done));
    it('name - DESC', (done) => assert('name', 'DESC', [ 'Foo', 'Bar' ], [ 100, 50 ], done));
    it('value - ASC', (done) => assert('value', 'ASC', [ 'Bar', 'Foo' ], [ 50, 100 ], done));
    it('value - DESC', (done) => assert('value', 'DESC', [ 'Foo', 'Bar' ], [ 100, 50 ], done));
  });

  describe('renders properly paginated stats when pagination is set', () => {
    let assert;

    beforeEach(() => {
      const wrapper = createWrapper(true, range(1, 159).reduce((accum, value) => {
        accum[`key_${value}`] = value;

        return accum;
      }, {}));
      const dropdown = wrapper.renderProp('title')().find(PaginationDropdown);

      assert = (itemsPerPage, expectedStats, done) => {
        dropdown.prop('setValue')(itemsPerPage);
        setImmediate(() => {
          const stats = wrapper.find(GraphCard).prop('stats');

          expect(keys(stats)).toEqual(expectedStats);
          done();
        });
      };
    });

    const buildExpected = (size) => [ 'Foo', 'Bar', ...rangeOf(size - 2, (i) => `key_${i}`) ];

    it('50 items per page', (done) => assert(50, buildExpected(50), done));
    it('100 items per page', (done) => assert(100, buildExpected(100), done));
    it('200 items per page', (done) => assert(200, buildExpected(160), done));
    it('500 items per page', (done) => assert(500, buildExpected(160), done));
  });

  it('renders extra header content', () => {
    wrapper = shallow(
      <span>
        <SortableBarGraph
          title="Foo"
          stats={stats}
          sortingItems={sortingItems}
          extraHeaderContent={() => (
            <span>
              <span className="foo-span">Foo</span>
              <span className="bar-span">Bar</span>
            </span>
          )}
        />
      </span>
    ).find(SortableBarGraph);
    const header = wrapper.renderProp('extraHeaderContent')();

    expect(header.find('.foo-span')).toHaveLength(1);
    expect(header.find('.bar-span')).toHaveLength(1);
  });
});