import { describe, test, expect } from 'bun:test';
import { parseAcquisition } from '$lib/utils/acquisition';

describe('parseAcquisition', () => {
	test('extracts utm parameters and ref', () => {
		const a = parseAcquisition('?utm_source=bluesky&utm_medium=social&utm_campaign=launch', '');
		expect(a.utm_source).toBe('bluesky');
		expect(a.utm_medium).toBe('social');
		expect(a.utm_campaign).toBe('launch');
	});

	test('falls back to ref for the source', () => {
		expect(parseAcquisition('?ref=hn', '').utm_source).toBe('hn');
	});

	test('keeps an external referrer', () => {
		const a = parseAcquisition('', 'https://news.ycombinator.com/item?id=1');
		expect(a.referrer).toBe('https://news.ycombinator.com/item?id=1');
	});

	test('blank and whitespace values become null', () => {
		const a = parseAcquisition('?utm_source=%20%20', '');
		expect(a.utm_source).toBeNull();
		expect(a.referrer).toBeNull();
	});

	test('caps absurdly long values', () => {
		const a = parseAcquisition(`?utm_source=${'x'.repeat(500)}`, '');
		expect(a.utm_source!.length).toBe(256);
	});
});