/* eslint-env mocha */
/* global sinon */
/* eslint-disable prefer-arrow-callback */
/* eslint-disable no-unused-expressions */

import React from 'react';

import chai, { expect } from 'chai';
import chaiEnzyme from 'chai-enzyme';
// `this.wrapper` and `this.dom` is set in the helpers file
import {
	mountComponent,
	unmountComponent,
} from '../../../tests/enzyme-helpers';

import { keyObjects } from '../../../utilities/key-code';
import sampleNodesDynamicHashMap from '../__docs__/dynamic-hashmap';

import DefaultExample from '../__examples__/default';

chai.use(chaiEnzyme());

const COMPONENT_CSS_CLASSES = {
	base: 'slds-tree',
};

describe('Tree: ', () => {
	/*
		Tests
	 */
	describe('Tree can be navigated up/down using the keyboard', () => {
		beforeEach(mountComponent(<DefaultExample log={() => {}} />));

		afterEach(unmountComponent);

		it('moves selection up/down with wrapping when using keyboard up/down keys', function() {
			// Initial focus selects the item
			this.wrapper.find('#example-tree-1').simulate('focus');
			let itemDiv = this.wrapper
				.find('#example-tree-1')
				.find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Go to next node
			this.wrapper.find('#example-tree-1').simulate('keyDown', keyObjects.DOWN);
			itemDiv = this.wrapper.find('#example-tree-2').find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Go to next node
			this.wrapper.find('#example-tree-2').simulate('keyDown', keyObjects.DOWN);
			itemDiv = this.wrapper.find('#example-tree-3').find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Go to next node
			this.wrapper.find('#example-tree-3').simulate('keyDown', keyObjects.DOWN);
			itemDiv = this.wrapper.find('#example-tree-7').find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Wrap to first node
			this.wrapper.find('#example-tree-7').simulate('keyDown', keyObjects.DOWN);
			itemDiv = this.wrapper.find('#example-tree-1').find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Wrap to last node
			this.wrapper.find('#example-tree-1').simulate('keyDown', keyObjects.UP);
			itemDiv = this.wrapper.find('#example-tree-7').find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Go to previous node
			this.wrapper.find('#example-tree-7').simulate('keyDown', keyObjects.UP);
			itemDiv = this.wrapper.find('#example-tree-3').find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Go to previous node
			this.wrapper.find('#example-tree-3').simulate('keyDown', keyObjects.UP);
			itemDiv = this.wrapper.find('#example-tree-2').find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Go to previous node
			this.wrapper.find('#example-tree-2').simulate('keyDown', keyObjects.UP);
			itemDiv = this.wrapper.find('#example-tree-1').find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);
		});
	});

	describe('Tree can be navigated right/left using the keyboard', () => {
		beforeEach(mountComponent(<DefaultExample log={() => {}} />));

		afterEach(unmountComponent);

		it('expands/collapses branches when using right/left keys', function() {
			// Initial focus selects the item
			const item = this.wrapper.find('#example-tree-1');
			item.simulate('focus');
			const itemDiv = this.wrapper
				.find('#example-tree-1')
				.find('.slds-is-selected');
			expect(itemDiv).to.have.length(1);

			// Expand branch
			this.wrapper
				.find('#example-tree-3')
				.simulate('keyDown', keyObjects.RIGHT);
			let items = this.wrapper.find('li[aria-level=2]');
			expect(items).to.have.length(4);

			// Collapse branch
			this.wrapper.find('#example-tree-3').simulate('keyDown', keyObjects.LEFT);
			items = this.wrapper.find('li[aria-level=2]');
			expect(items).to.have.length(0);

			// Expand branch and select an item
			this.wrapper
				.find('#example-tree-3')
				.simulate('keyDown', keyObjects.RIGHT);
			items = this.wrapper.find('li[aria-level=2]');
			expect(items).to.have.length(4);

			// Collapse branch from an item
			this.wrapper.find('#example-tree-3').simulate('keyDown', keyObjects.DOWN);
			this.wrapper.find('#example-tree-8').simulate('keyDown', keyObjects.LEFT);
			items = this.wrapper.find('li[aria-level=2]');
			expect(items).to.have.length(0);
		});
	});

	describe('Default Structure and CSS', () => {
		const id = 'this-is-a-container-test';
		beforeEach(
			mountComponent(
				<DefaultExample
					className="this-is-a-container-test"
					heading="Foods"
					id={id}
					listClassName="this-is-an-unordered-list-test"
					listStyle={{ height: '500px' }}
					log={() => {}}
				/>
			)
		);

		afterEach(unmountComponent);

		it('has tree container class, list class, and heading', function() {
			const container = this.wrapper.find('.slds-tree_container');
			expect(container.hasClass('this-is-a-container-test')).to.be.true;

			const list = this.wrapper.find(`.${COMPONENT_CSS_CLASSES.base}`);
			expect(list).to.have.length(1);
			expect(list.hasClass('this-is-an-unordered-list-test')).to.be.true;
			expect(list.get(0).props.style).to.have.property(
				'height',
				'500px',
				'height of list'
			);

			const heading = this.wrapper.find(`#${id}__heading`);
			expect(heading).to.have.length(1);
		});
	});

	describe('Assistive Technology', () => {
		beforeEach(
			mountComponent(
				<DefaultExample log={() => {}} assistiveText={{ label: 'Foods' }} />
			)
		);

		afterEach(unmountComponent);

		it('has heading via assistiveText', function() {
			const heading = this.wrapper.find(
				'#example-tree__heading.slds-assistive-text'
			);
			expect(heading).to.have.length(1);
			const ariaLabelledbyId = this.wrapper.find(
				'.slds-tree[aria-labelledby="example-tree__heading"]'
			);
			expect(ariaLabelledbyId).to.have.length(1);
		});
	});

	describe('Initial Expanded and Selection based on nodes', () => {
		beforeEach(
			mountComponent(
				<DefaultExample
					log={() => {}}
					nodes={sampleNodesDynamicHashMap.initialExpandedSelected}
				/>
			)
		);

		afterEach(unmountComponent);

		it('has initial selection', function() {
			let selectedNode = this.wrapper
				.find('#example-tree-2')
				.find('.slds-is-selected');
			// Fruits, Watermelon, Tree Fruits
			expect(selectedNode).to.have.length(3);
			selectedNode = this.wrapper
				.find('#example-tree-5')
				.find('.slds-is-selected');
			expect(selectedNode).to.have.length(1);
		});

		it('has initial expanded branches', function() {
			const expandedBranchList = this.wrapper
				.find('#example-tree-2')
				.find('.slds-is-expanded');
			expect(expandedBranchList).to.have.length(2);
		});
	});

	describe('Branch expands and selects on click', () => {
		const itemClicked = sinon.spy();
		const expandClicked = sinon.spy();

		beforeEach(
			mountComponent(
				<DefaultExample
					log={() => {}}
					onExpandClick={expandClicked}
					onClick={itemClicked}
				/>
			)
		);

		afterEach(unmountComponent);

		it('branch calls onExpandClicked and onClick', function() {
			const branch = this.wrapper
				.find('#example-tree-2')
				.find('.slds-tree__item');
			branch.simulate('click');
			expect(itemClicked.callCount).to.equal(1);

			const expandButton = this.wrapper
				.find('#example-tree-2')
				.find('.slds-button');
			expandButton.simulate('click');
			expect(expandClicked.callCount).to.equal(1);
		});
	});

	describe('Item calls onClick', () => {
		const itemClicked = sinon.spy();

		beforeEach(
			mountComponent(<DefaultExample log={() => {}} onClick={itemClicked} />)
		);

		afterEach(unmountComponent);

		it('item calls itemClicked', function() {
			const item = this.wrapper
				.find('#example-tree-1')
				.find('.slds-tree__item');
			item.simulate('click');
			expect(itemClicked.callCount).to.equal(1);
		});
	});

	describe('Search term is highlighted', () => {
		beforeEach(
			mountComponent(<DefaultExample log={() => {}} searchTerm="fruit" />)
		);

		afterEach(unmountComponent);

		it('item calls itemClicked', function() {
			const markedItem = this.wrapper.find('mark');
			expect(markedItem).to.have.length(1);
		});
	});

	describe('Scrolling calls onScroll', () => {
		const onScroll = sinon.spy();

		beforeEach(
			mountComponent(
				<DefaultExample
					heading="Foods"
					listStyle={{
						height: '300px',
						overflowY: 'auto',
					}}
					log={() => {}}
					nodes={sampleNodesDynamicHashMap.large}
					onScroll={onScroll}
				/>
			)
		);

		afterEach(unmountComponent);

		it('scrolling calls onScroll', function() {
			const list = this.wrapper.find(`.${COMPONENT_CSS_CLASSES.base}`);
			list.simulate('scroll');
			expect(onScroll.callCount).to.equal(1);
		});
	});
});