import {describe, expect, it, vi, beforeEach} from 'vitest';
import express from 'express';
import request from 'supertest';

vi.mock('../../src/models/calendar/events/events.service.js', () => ({
	getAllEvents: vi.fn(),
	getAllEventsAdmin: vi.fn(),
	getEventById: vi.fn(),
	createEvent: vi.fn(),
	updateEvent: vi.fn(),
	deleteEvent: vi.fn(),
	moveEvent: vi.fn(),
	getNextUpcomingEvent: vi.fn()
}));

vi.mock('../../src/models/admin/admin.auth.js', () => ({
	auth: {api: {getSession: vi.fn()}}
}));

vi.mock('../../src/models/admin/users/users.admin.service.js', () => ({
	loadAccess: vi.fn()
}));

import * as EventService from '../../src/models/calendar/events/events.service.js';
import {auth} from '../../src/models/admin/admin.auth.js';
import * as UsersService from '../../src/models/admin/users/users.admin.service.js';
import {eventsRouter} from '../../src/models/calendar/events/events.router.js';

/**
 * Step 4 of docs/calendar-auth-migration.md at the route level. The unit test
 * on credentials.service covers the password table; this covers the thing that
 * table is wired into, which is where the interesting mistakes live:
 *
 *   - the public calendar has to stay readable with no session and no password,
 *   - the shared password has to keep working for the restricted calendars,
 *     because iCal clients cannot send a cookie,
 *   - and every write has to be behind the session cookie *and* an explicit
 *     calendar permission, not merely behind "is signed in".
 */

const app = express();
app.use(express.json());
app.use('/calendar/events', eventsRouter);

const signedInAs = (apps: string[], disabled = false) => {
	(auth.api.getSession as any).mockResolvedValue({user: {id: 'admin-1'}});
	(UsersService.loadAccess as any).mockResolvedValue({
		id: 'admin-1',
		email: 'a@nachklang.art',
		displayName: 'A',
		disabled,
		permissions: apps.map(app => ({app, role: 'access'})),
		apps
	});
};

const signedOut = () => {
	(auth.api.getSession as any).mockResolvedValue(null);
};

const validEvent = {
	calendarId: 1,
	name: 'Konzert',
	startDateTime: '2026-04-18T19:00:00Z',
	endDateTime: '2026-04-18T21:00:00Z'
};

beforeEach(() => {
	vi.clearAllMocks();
	process.env.MEMBER_CREDENTIAL = 'member-secret';
	(EventService.getAllEvents as any).mockResolvedValue([]);
	(EventService.getAllEventsAdmin as any).mockResolvedValue([]);
	(EventService.createEvent as any).mockResolvedValue(1);
	(EventService.updateEvent as any).mockResolvedValue(1);
	(EventService.moveEvent as any).mockResolvedValue(true);
	(EventService.deleteEvent as any).mockResolvedValue(true);
	signedOut();
});

describe('reading', () => {
	it('serves the public calendar anonymously', async () => {
		// The property nachklang.art depends on. No cookie, no password.
		await request(app).get('/calendar/events/public/json').expect(200);

		// And as the non-admin view: an anonymous caller must not see drafts.
		expect(EventService.getAllEvents).toHaveBeenCalled();
		expect(EventService.getAllEventsAdmin).not.toHaveBeenCalled();
	});

	it('refuses a restricted calendar with neither session nor password', async () => {
		await request(app).get('/calendar/events/members/json').expect(403);
	});

	it('serves a restricted calendar to a shared password, without drafts', async () => {
		await request(app)
			.get('/calendar/events/members/json')
			.query({password: 'member-secret'})
			.expect(200);

		expect(EventService.getAllEvents).toHaveBeenCalled();
		expect(EventService.getAllEventsAdmin).not.toHaveBeenCalled();
	});

	it('gives a signed-in editor the admin view instead', async () => {
		signedInAs(['calendar']);

		await request(app).get('/calendar/events/members/json').expect(200);

		expect(EventService.getAllEventsAdmin).toHaveBeenCalled();
		expect(EventService.getAllEvents).not.toHaveBeenCalled();
	});

	it('treats a signed-in user without the calendar permission as anonymous', async () => {
		// Not a 403: they may still read the public calendar like anyone else.
		signedInAs(['tickets']);

		await request(app).get('/calendar/events/public/json').expect(200);
		expect(EventService.getAllEvents).toHaveBeenCalled();
		expect(EventService.getAllEventsAdmin).not.toHaveBeenCalled();

		await request(app).get('/calendar/events/members/json').expect(403);
	});

	it('still serves the public calendar when the admin database is down', async () => {
		(auth.api.getSession as any).mockRejectedValue(new Error('ECONNREFUSED'));

		await request(app).get('/calendar/events/public/json').expect(200);
	});

	it('keeps the shared password working on the iCal export', async () => {
		(EventService.getAllEvents as any).mockResolvedValue([]);

		await request(app).get('/calendar/events/public/ical').expect(200);
		await request(app).get('/calendar/events/members/ical').expect(403);
		await request(app)
			.get('/calendar/events/members/ical')
			.query({password: 'member-secret'})
			.expect(200);
	});
});

describe('writing', () => {
	it.each([
		['post', '/calendar/events'],
		['put', '/calendar/events/1'],
		['put', '/calendar/events/move/1'],
		['delete', '/calendar/events/1']
	])('%s %s answers 401 when signed out', async (method, path) => {
		await (request(app) as any)[method](path).send(validEvent).expect(401);
	});

	it.each([
		['post', '/calendar/events'],
		['put', '/calendar/events/1'],
		['put', '/calendar/events/move/1'],
		['delete', '/calendar/events/1']
	])('%s %s answers 403 without the calendar permission', async (method, path) => {
		signedInAs(['tickets', 'feedback', 'admin']);
		await (request(app) as any)[method](path).send(validEvent).expect(403);
	});

	it('answers 403 for a disabled account that still holds the permission', async () => {
		signedInAs(['calendar'], true);
		await request(app).post('/calendar/events').send(validEvent).expect(403);
	});

	it('records the writer as an admin user id, never a legacy one', async () => {
		signedInAs(['calendar']);

		await request(app).post('/calendar/events').send(validEvent).expect(201);

		const written = (EventService.createEvent as any).mock.calls[0][0];
		expect(written.createdByUserId).toBe('admin-1');
		// Migration 003 made the legacy column nullable precisely so this can be unset.
		expect(written.createdById).toBeUndefined();
	});

	it('refuses the shared password as a way to write', async () => {
		// The passwords are a read fallback for clients that cannot hold a
		// session. They must never become an editing credential.
		await request(app)
			.post('/calendar/events')
			.query({password: 'member-secret'})
			.send(validEvent)
			.expect(401);
	});
});