import { describe, it, expect } from 'vitest';

import { cardContentHash } from '../src/content-hash.ts';

describe('cardContentHash', () => {
	it('liefert deterministischen 64-char-hex-String (SHA-256)', async () => {
		const h = await cardContentHash({
			type: 'basic',
			fields: { front: 'Q', back: 'A' },
		});
		expect(h).toMatch(/^[0-9a-f]{64}$/);
	});

	it('ist invariant gegenüber Field-Reihenfolge', async () => {
		const a = await cardContentHash({
			type: 'basic',
			fields: { front: 'Q', back: 'A' },
		});
		const b = await cardContentHash({
			type: 'basic',
			fields: { back: 'A', front: 'Q' },
		});
		expect(a).toBe(b);
	});

	it('unterscheidet basic und basic-reverse', async () => {
		const a = await cardContentHash({
			type: 'basic',
			fields: { front: 'Q', back: 'A' },
		});
		const b = await cardContentHash({
			type: 'basic-reverse',
			fields: { front: 'Q', back: 'A' },
		});
		expect(a).not.toBe(b);
	});

	it('unterscheidet zwei Cloze-Karten mit unterschiedlichem Cluster-Markup', async () => {
		const a = await cardContentHash({
			type: 'cloze',
			fields: { text: 'Die {{c1::Hauptstadt}} ist {{c2::Paris}}.' },
		});
		const b = await cardContentHash({
			type: 'cloze',
			fields: { text: 'Die Hauptstadt ist {{c1::Paris}}.' },
		});
		expect(a).not.toBe(b);
	});

	it('unterscheidet Karten mit Whitespace-Drift', async () => {
		const a = await cardContentHash({
			type: 'basic',
			fields: { front: 'Q', back: 'A' },
		});
		const b = await cardContentHash({
			type: 'basic',
			fields: { front: 'Q ', back: 'A' },
		});
		expect(a).not.toBe(b);
	});
});