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

import { cardsRouter } from '../src/routes/cards.ts';
import type { CardsDb } from '../src/db/connection.ts';

/**
 * Routen-Tests ohne echte DB. Drizzle-Aufrufe werden durch eine
 * minimale Stub-DB ersetzt, die nur die Validations-Pfade abdeckt.
 */

function buildApp() {
	const app = new Hono();
	const stub = {
		select: () => ({
			from: () => ({
				where: () => ({ limit: () => [] }),
			}),
		}),
	};
	app.route('/api/v1/cards', cardsRouter({ db: stub as unknown as CardsDb }));
	return { app };
}

describe('cardsRouter — auth-gate', () => {
	it('GET ohne X-User-Id ist 401', async () => {
		const { app } = buildApp();
		const res = await app.request('/api/v1/cards');
		expect(res.status).toBe(401);
	});
});

describe('cardsRouter — Input-Validation', () => {
	it('POST mit leerem Body ist 422', async () => {
		const { app } = buildApp();
		const res = await app.request('/api/v1/cards', {
			method: 'POST',
			headers: { 'X-User-Id': 'u-1', 'Content-Type': 'application/json' },
			body: '{}',
		});
		expect(res.status).toBe(422);
	});

	it('POST mit basic-Card ohne back-Feld ist 422', async () => {
		const { app } = buildApp();
		const res = await app.request('/api/v1/cards', {
			method: 'POST',
			headers: { 'X-User-Id': 'u-1', 'Content-Type': 'application/json' },
			body: JSON.stringify({
				deck_id: 'd-1',
				type: 'basic',
				fields: { front: 'Q' },
			}),
		});
		expect(res.status).toBe(422);
	});

	it('POST mit unknown CardType ist 422', async () => {
		const { app } = buildApp();
		const res = await app.request('/api/v1/cards', {
			method: 'POST',
			headers: { 'X-User-Id': 'u-1', 'Content-Type': 'application/json' },
			body: JSON.stringify({
				deck_id: 'd-1',
				type: 'cloze',
				fields: { text: 'x' },
			}),
		});
		expect(res.status).toBe(422);
	});

	it('PATCH mit extra prop ist 422', async () => {
		const { app } = buildApp();
		const res = await app.request('/api/v1/cards/c-1', {
			method: 'PATCH',
			headers: { 'X-User-Id': 'u-1', 'Content-Type': 'application/json' },
			body: JSON.stringify({ fields: { front: 'X' }, leak: 'bad' }),
		});
		expect(res.status).toBe(422);
	});

	it('POST mit gültigem basic-Card erreicht Deck-Lookup (404 bei stub)', async () => {
		const { app } = buildApp();
		const res = await app.request('/api/v1/cards', {
			method: 'POST',
			headers: { 'X-User-Id': 'u-1', 'Content-Type': 'application/json' },
			body: JSON.stringify({
				deck_id: 'd-1',
				type: 'basic',
				fields: { front: 'Q', back: 'A' },
			}),
		});
		// Stub-DB gibt empty array → Deck-Not-Found-Pfad
		expect(res.status).toBe(404);
		const body = (await res.json()) as { error: string };
		expect(body.error).toBe('deck_not_found');
	});
});