/*
 * SPDX-FileCopyrightText: syuilo and other misskey contributors
 * SPDX-License-Identifier: AGPL-3.0-only
 */

import { describe, test, assert, afterEach, beforeAll, vi } from 'vitest';
import { render, cleanup, type RenderResult } from '@testing-library/vue';
import './init';
import type { summaly } from 'summaly';
import type * as misskey from 'misskey-js';
import { components } from '@/components/index.js';
import { directives } from '@/directives/index.js';
import MkUrlPreview from '@/components/MkUrlPreview.vue';

type SummalyResult = Awaited<ReturnType<typeof summaly>>;

describe('MkUrlPreview', () => {
	const renderPreviewBy = async (summary: Partial<SummalyResult>): Promise<RenderResult> => {
		if (!summary.player) {
			summary.player = {
				url: null,
				width: null,
				height: null,
				allow: [],
			};
		}

		fetchMock.mockOnceIf(/^\/url?/, () => {
			return {
				status: 200,
				body: JSON.stringify(summary),
			};
		});

		const result = render(MkUrlPreview, {
			props: { url: summary.url },
			global: { directives, components },
		});

		await new Promise<void>(resolve => {
			const observer = new MutationObserver(() => {
				resolve();
				observer.disconnect();
			});
			observer.observe(result.container, { childList: true, subtree: true });
		});

		return result;
	};

	const renderAndOpenPreview = async (summary: Partial<SummalyResult>): Promise<RenderResult> => {
		const mkUrlPreview = await renderPreviewBy(summary);
		const buttons = mkUrlPreview.getAllByRole('button');
		buttons[0].click();
		// Wait for the click event to be fired
		await Promise.resolve();

		return mkUrlPreview;
	};

	const renderAndOpenPreviewInIFrame = async (summary: Partial<SummalyResult>): Promise<HTMLIFrameElement | null> => {
		const mkUrlPreview = await renderAndOpenPreview(summary);
		return mkUrlPreview.container.querySelector('iframe');
	};

	afterEach(() => {
		fetchMock.resetMocks();
		cleanup();
	});

	test('Should render the description', async () => {
		const mkUrlPreview = await renderPreviewBy({
			url: 'https://example.local',
			description: 'Mocked description',
		});
		mkUrlPreview.getByText('Mocked description');
	});

	test('Having a player should render a button', async () => {
		const mkUrlPreview = await renderPreviewBy({
			url: 'https://example.local',
			player: {
				url: 'https://example.local/player',
				width: null,
				height: null,
				allow: [],
			},
		});
		const buttons = mkUrlPreview.getAllByRole('button');
		assert.strictEqual(buttons.length, 2, 'two buttons');
	});

	test('Having a player should setup the iframe', async () => {
		const iframe = await renderAndOpenPreviewInIFrame({
			url: 'https://example.local',
			player: {
				url: 'https://example.local/player',
				width: null,
				height: null,
				allow: [],
			},
		});
		assert.exists(iframe, 'iframe should exist');
		assert.strictEqual(iframe?.src, 'https://example.local/player?autoplay=1&auto_play=1');
		assert.strictEqual(
			iframe?.sandbox.toString(),
			'allow-popups allow-scripts allow-storage-access-by-user-activation allow-same-origin',
		);
	});

	test('Having a player with `allow` field should set permissions', async () => {
		const iframe = await renderAndOpenPreviewInIFrame({
			url: 'https://example.local',
			player: {
				url: 'https://example.local/player',
				width: null,
				height: null,
				allow: ['fullscreen', 'web-share'],
			},
		});
		assert.exists(iframe, 'iframe should exist');
		assert.strictEqual(iframe?.allow, 'fullscreen;web-share');
	});

	test('Having a player width should keep the fixed aspect ratio', async () => {
		const iframe = await renderAndOpenPreviewInIFrame({
			url: 'https://example.local',
			player: {
				url: 'https://example.local/player',
				width: 400,
				height: 200,
				allow: [],
			},
		});
		assert.exists(iframe, 'iframe should exist');
		assert.strictEqual(iframe?.parentElement?.style.paddingTop, '50%');
	});

	test('Having a player width should keep the fixed height', async () => {
		const iframe = await renderAndOpenPreviewInIFrame({
			url: 'https://example.local',
			player: {
				url: 'https://example.local/player',
				width: null,
				height: 200,
				allow: [],
			},
		});
		assert.exists(iframe, 'iframe should exist');
		assert.strictEqual(iframe?.parentElement?.style.paddingTop, '200px');
	});

	test('Loading a tweet in iframe', async () => {
		const iframe = await renderAndOpenPreviewInIFrame({
			url: 'https://twitter.com/i/web/status/1685072521782325249',
		});
		assert.exists(iframe, 'iframe should exist');
		assert.strictEqual(iframe?.getAttribute('allow'), 'fullscreen;web-share');
		assert.strictEqual(iframe?.getAttribute('sandbox'), 'allow-popups allow-popups-to-escape-sandbox allow-scripts allow-same-origin');
	});

	test('Loading a post in iframe', async () => {
		const iframe = await renderAndOpenPreviewInIFrame({
			url: 'https://x.com/i/web/status/1685072521782325249',
		});
		assert.exists(iframe, 'iframe should exist');
		assert.strictEqual(iframe?.getAttribute('allow'), 'fullscreen;web-share');
		assert.strictEqual(iframe?.getAttribute('sandbox'), 'allow-popups allow-popups-to-escape-sandbox allow-scripts allow-same-origin');
	});

	describe('ActivityPub notes', () => {
		afterEach(() => {
			vi.clearAllMocks();
		});

		test('Preview a note', async () => {
			vi.mock('@/os', () => {
				return {
					api(endpoint: string): unknown {
						if (endpoint === 'ap/show') {
							return {
								type: 'Note',
								object: {
									text: 'Mizuki',
									createdAt: new Date().toISOString(),
									user: {},
									files: [] as misskey.entities.DriveFile[],
								} as misskey.entities.Note,
							};
						}
						throw new Error(`Unexpected api call ${endpoint}`);
					},
				};
			});

			const url = 'https://example.local';
			const renderResult = await renderAndOpenPreview({
				url,
				description: 'Misskey',
				activityPub: url,
			});

			assert.notExists(renderResult.queryByText('Misskey'), 'Original description should disappear');
			assert.exists(renderResult.queryByText('Mizuki'), 'ActivityPub fetch result should appear');
		});
	});
});