import { EditorSelection, Text as DocumentText } from '@codemirror/state';
import { RegionSpec } from './RegionSpec';
import findInlineMatch, { MatchSide } from './findInlineMatch';

describe('findInlineMatch', () => {
	jest.retryTimes(2);

	const boldSpec: RegionSpec = RegionSpec.of({
		template: '**',
	});

	it('matching a bolded region: should return the length of the match', () => {
		const doc = DocumentText.of(['**test**']);
		const sel = EditorSelection.range(0, 5);

		// matchStart returns the length of the match
		expect(findInlineMatch(doc, boldSpec, sel, MatchSide.Start)).toBe(2);
	});

	it('matching a bolded region: should match the end of a region, if next to the cursor', () => {
		const doc = DocumentText.of(['**...** test.']);
		const sel = EditorSelection.range(5, 5);
		expect(findInlineMatch(doc, boldSpec, sel, MatchSide.End)).toBe(2);
	});

	it('matching a bolded region: should return -1 if no match is found', () => {
		const doc = DocumentText.of(['**...** test.']);
		const sel = EditorSelection.range(3, 3);
		expect(findInlineMatch(doc, boldSpec, sel, MatchSide.Start)).toBe(-1);
	});

	it('should match a custom specification of italicized regions', () => {
		const spec: RegionSpec = {
			template: { start: '*', end: '*' },
			matcher: { start: /[*_]/g, end: /[*_]/g },
		};
		const testString = 'This is a _test_';
		const testDoc = DocumentText.of([testString]);
		const fullSel = EditorSelection.range('This is a '.length, testString.length);

		// should match the start of the region
		expect(findInlineMatch(testDoc, spec, fullSel, MatchSide.Start)).toBe(1);

		// should match the end of the region
		expect(findInlineMatch(testDoc, spec, fullSel, MatchSide.End)).toBe(1);
	});

	const listSpec: RegionSpec = {
		template: { start: ' - ', end: '' },
		matcher: {
			start: /^\s*[-*]\s/g,
			end: /$/g,
		},
	};

	it('matching a custom list: should not match a list if not within the selection', () => {
		const doc = DocumentText.of(['- Test...']);
		const sel = EditorSelection.range(1, 6);

		// Beginning of list not selected: no match
		expect(findInlineMatch(doc, listSpec, sel, MatchSide.Start)).toBe(-1);
	});

	it('matching a custom list: should match start of selected, unindented list', () => {
		const doc = DocumentText.of(['- Test...']);
		const sel = EditorSelection.range(0, 6);

		expect(findInlineMatch(doc, listSpec, sel, MatchSide.Start)).toBe(2);
	});

	it('matching a custom list: should match start of indented list', () => {
		const doc = DocumentText.of(['   - Test...']);
		const sel = EditorSelection.range(0, 6);

		expect(findInlineMatch(doc, listSpec, sel, MatchSide.Start)).toBe(5);
	});

	it('matching a custom list: should match the end of an item in an indented list', () => {
		const doc = DocumentText.of(['   - Test...']);
		const sel = EditorSelection.range(0, 6);

		// Zero-length, but found, selection
		expect(findInlineMatch(doc, listSpec, sel, MatchSide.End)).toBe(0);
	});
});