import path from 'node:path';
import { expect, test } from 'vitest';
import { Input } from '../../src/input.js';
import { FilePathSource } from '../../src/source.js';
import { ALL_FORMATS } from '../../src/input-format.js';
import { Output } from '../../src/output.js';
import { BufferTarget } from '../../src/target.js';
import { Mp4OutputFormat } from '../../src/output-format.js';
import { Conversion } from '../../src/conversion.js';

const __dirname = new URL('.', import.meta.url).pathname;

const samplePath = path.join(__dirname, '../public/video.mp4');

test('BufferTarget onFinalize callback', async () => {
	let received: ArrayBuffer | null = null;
	let asyncCallbackDone = false;

	using input = new Input({
		source: new FilePathSource(samplePath),
		formats: ALL_FORMATS,
	});

	const output = new Output({
		format: new Mp4OutputFormat(),
		target: new BufferTarget({
			onFinalize: async (buffer) => {
				received = buffer;
				await new Promise(resolve => setTimeout(resolve, 20));
				asyncCallbackDone = true;
			},
		}),
	});

	const conversion = await Conversion.init({ input, output, showWarnings: false });
	await conversion.execute();

	expect(received).not.toBeNull();
	expect(received).toBe(output.target.buffer);
	expect(asyncCallbackDone).toBe(true);
	expect(output.target.buffer!.byteLength).toBeGreaterThan(0);
});