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

import { shareRouter } from '../src/routes/share.ts';
import type { CardsDb } from '../src/db/connection.ts';

function buildApp() {
	const stub = {} as CardsDb;
	const app = new Hono();
	app.route('/api/v1/share', shareRouter({ db: stub }));
	return { app };
}

const userA = '00000000-0000-0000-0000-00000000aaaa';
const userB = '00000000-0000-0000-0000-00000000bbbb';

function envelope(overrides: Record<string, unknown> = {}) {
	return {
		envelope_version: '0.1',
		share_id: '01HZ0EJW6V6N4SM3X5RHKR8B5T', // ULID-Pattern
		from: {
			app: 'zitate',
			app_version: '1.0.0',
			user_id: userA,
			timestamp: new Date().toISOString(),
		},
		to: {
			app: 'cards',
			user_id: userA,
		},
		type: 'mana/quote',
		payload: { text: 'Lernen ohne Nachdenken ist verlorene Mühe', source: 'Konfuzius' },
		intent: 'user_action',
		consent_recorded_at: new Date().toISOString(),
		...overrides,
	};
}

describe('shareRouter — Auth-Gate', () => {
	it('POST /receive ohne X-User-Id ist 401', async () => {
		const { app } = buildApp();
		const res = await app.request('/api/v1/share/receive', {
			method: 'POST',
			body: JSON.stringify(envelope()),
		});
		expect(res.status).toBe(401);
	});
});

describe('shareRouter — Envelope-Validation', () => {
	it('Body kein JSON → 400', async () => {
		const { app } = buildApp();
		const res = await app.request('/api/v1/share/receive', {
			method: 'POST',
			headers: { 'X-User-Id': userA, 'Content-Type': 'application/json' },
			body: 'not-json',
		});
		expect(res.status).toBe(400);
	});

	it('Cross-User-Share ist 422 (envelope_invalid)', async () => {
		const { app } = buildApp();
		const env = envelope({
			to: { app: 'cards', user_id: userB }, // anderer User → Cross-User
		});
		const res = await app.request('/api/v1/share/receive', {
			method: 'POST',
			headers: { 'X-User-Id': userA, 'Content-Type': 'application/json' },
			body: JSON.stringify(env),
		});
		expect(res.status).toBe(422);
		const body = (await res.json()) as { reason: string };
		expect(body.reason).toBe('envelope_invalid');
	});

	it('User-Mismatch (envelope.to.user_id != X-User-Id) ist 403', async () => {
		const { app } = buildApp();
		const env = envelope({
			from: { ...envelope().from, user_id: userB },
			to: { app: 'cards', user_id: userB },
		});
		const res = await app.request('/api/v1/share/receive', {
			method: 'POST',
			headers: { 'X-User-Id': userA, 'Content-Type': 'application/json' },
			body: JSON.stringify(env),
		});
		expect(res.status).toBe(403);
		const body = (await res.json()) as { reason: string };
		expect(body.reason).toBe('user_id_mismatch');
	});

	it('Wrong-Recipient (to.app != cards) ist 422', async () => {
		const { app } = buildApp();
		const env = envelope({ to: { app: 'memoro', user_id: userA } });
		const res = await app.request('/api/v1/share/receive', {
			method: 'POST',
			headers: { 'X-User-Id': userA, 'Content-Type': 'application/json' },
			body: JSON.stringify(env),
		});
		expect(res.status).toBe(422);
		const body = (await res.json()) as { reason: string };
		expect(body.reason).toBe('wrong_recipient');
	});

	it('Unbekannter Type ist 422', async () => {
		const { app } = buildApp();
		const env = envelope({ type: 'mana/unknown-thing', payload: {} });
		const res = await app.request('/api/v1/share/receive', {
			method: 'POST',
			headers: { 'X-User-Id': userA, 'Content-Type': 'application/json' },
			body: JSON.stringify(env),
		});
		expect(res.status).toBe(422);
		const body = (await res.json()) as { reason: string };
		expect(body.reason).toBe('type_not_accepted');
	});

	it('Quote-Payload ohne text ist 422', async () => {
		const { app } = buildApp();
		const env = envelope({ payload: { source: 'X' } });
		const res = await app.request('/api/v1/share/receive', {
			method: 'POST',
			headers: { 'X-User-Id': userA, 'Content-Type': 'application/json' },
			body: JSON.stringify(env),
		});
		expect(res.status).toBe(422);
		const body = (await res.json()) as { reason: string };
		expect(body.reason).toBe('invalid_payload');
	});

	it('Wrapped Body { envelope, delivery_token } akzeptiert', async () => {
		const { app } = buildApp();
		const env = envelope({ to: { app: 'memoro', user_id: userA } });
		const res = await app.request('/api/v1/share/receive', {
			method: 'POST',
			headers: { 'X-User-Id': userA, 'Content-Type': 'application/json' },
			body: JSON.stringify({ envelope: env, delivery_token: 'tok_xyz' }),
		});
		// Wrong-Recipient nicht 422 → Wrapper wurde korrekt unwrapped (sonst wäre es envelope_invalid)
		expect(res.status).toBe(422);
		const body = (await res.json()) as { reason: string };
		expect(body.reason).toBe('wrong_recipient');
	});
});