import assert from 'node:assert/strict';
import { describe, it, before, after } from 'node:test';
import { loadFixture } from './test-utils.js';
import testAdapter from './test-adapter.js';

const NEW_LINES = /[\r\n]+/g;

/**
 * The doctype declaration is on a line between the rest of the HTML in SSG.
 * This function removes the doctype so that we can check if the rest of the HTML is without
 * whitespace.
 */
function removeDoctypeLine(html) {
	return html.slice(20);
}

/**
 * In the dev environment, two more script tags will be injected than in the production environment
 * so that we can check if the rest of the HTML is without whitespace
 */
function removeDoctypeLineInDev(html) {
	return html.slice(-100);
}

describe('HTML minification', () => {
	describe('in DEV enviroment', () => {
		let fixture;
		let devServer;
		before(async () => {
			fixture = await loadFixture({
				root: './fixtures/minification-html/',
			});
			devServer = await fixture.startDevServer();
		});

		after(async () => {
			await devServer.stop();
		});

		it('should emit compressed HTML in the emitted file', async () => {
			let res = await fixture.fetch('/');
			assert.equal(res.status, 200);
			const html = await res.text();
			assert.equal(NEW_LINES.test(removeDoctypeLineInDev(html)), false);
		});
	});

	describe('Build SSG', () => {
		let fixture;
		before(async () => {
			fixture = await loadFixture({
				root: './fixtures/minification-html/',
				// test suite was authored when inlineStylesheets defaulted to never
				build: { inlineStylesheets: 'never' },
			});
			await fixture.build();
		});

		it('should emit compressed HTML in the emitted file', async () => {
			const html = await fixture.readFile('/index.html');
			assert.equal(NEW_LINES.test(html), false);
		});
	});

	describe('Build SSR', () => {
		let fixture;
		before(async () => {
			fixture = await loadFixture({
				root: './fixtures/minification-html/',
				output: 'server',
				adapter: testAdapter(),
				// test suite was authored when inlineStylesheets defaulted to never
				build: { inlineStylesheets: 'never' },
			});
			await fixture.build();
		});

		it('should emit compressed HTML in the emitted file', async () => {
			const app = await fixture.loadTestAdapterApp();
			const request = new Request('http://example.com/');
			const response = await app.render(request);
			const html = await response.text();
			assert.equal(NEW_LINES.test(removeDoctypeLine(html)), false);
		});
	});
});
