import { EditorSelection } from '@codemirror/state';
import createTestEditor from '../../testing/createTestEditor';
import renderBlockMedia from './renderBlockMedia';
import { EditorView } from '@codemirror/view';

const allowMediaInfoToResolve = async () => {
	// Yield to the event loop. Since resource info is fetched asynchronously, this is
	// needed to allow the asynchronous promise code to run
	await Promise.resolve();
};

const resolveResourceInfo = jest.fn((src: string) => {
	const match = src.match(/:\/([a-zA-Z0-9]{32})/);
	const id = match ? match[1] : '';
	const mimeById: Record<string, string> = {
		'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa': 'audio/mpeg',
		'bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb': 'video/mp4',
		'cccccccccccccccccccccccccccccccc': 'application/pdf',
	};
	const mime = mimeById[id];
	if (!mime) return Promise.resolve(null);
	return Promise.resolve({ url: `https://example.com/${id}`, mime });
});

const createEditor = async (initialMarkdown: string) => {
	const editor = await createTestEditor(
		initialMarkdown,
		EditorSelection.cursor(0),
		['Link'],
		[renderBlockMedia({ resolveImageSrc: async () => '', openLink: () => {}, resolveResourceInfo })],
	);
	await allowMediaInfoToResolve();
	return editor;
};

const findMedia = (editor: EditorView) => {
	return editor.dom.querySelectorAll('div.cm-md-media > audio, div.cm-md-media > video');
};

describe('renderBlockMedia', () => {
	test.each([
		{ markup: '[recording.m4a](:/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)', tag: 'AUDIO' },
		{ markup: '[video.mp4](:/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb)', tag: 'VIDEO' },
		{ markup: '[3月24日(1).mp4](:/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb)', tag: 'BODY' },
	])('should render a player below a standalone media link (case %#)', async ({ markup, tag }) => {
		const editor = await createEditor(markup);

		const media = findMedia(editor);
		expect(media).toHaveLength(1);
		expect(media[0].getAttribute('aria-label')).toContain(tag === 'BODY' ? '3月24日(1).mp4' : tag === 'AUDIO' ? 'recording.m4a' : 'video.mp4');
		// The raw Markdown must stay editable above the player
		expect(editor.state.doc.toString()).toContain(markup);
	});

	test('should not render a player for non-media attachments', async () => {
		const editor = await createEditor('[doc.pdf](:/cccccccccccccccccccccccccccccccc)');

		expect(findMedia(editor)).toHaveLength(0);
		// The leftover placeholder wrapper must be removed
		expect(editor.dom.querySelectorAll('div.cm-md-media')).toHaveLength(0);
	});

	test('should not render a player for web links', async () => {
		const editor = await createEditor('[video](https://example.com/video.mp4)');

		expect(findMedia(editor)).toHaveLength(0);
		expect(editor.dom.querySelectorAll('div.cm-md-media')).toHaveLength(0);
	});
});