import assert from 'assert';
import net from 'net';

import ClientManager from './ClientManager';

describe('ClientManager', () => {
    it('should construct with no tunnels', () => {
        const manager = new ClientManager();
        assert.equal(manager.stats.tunnels, 0);
    });

    it('should create a new client with random id', async () => {
        const manager = new ClientManager();
        const client = await manager.newClient();
        assert(manager.hasClient(client.id));
        manager.removeClient(client.id);
    });

    it('should create a new client with id', async () => {
        const manager = new ClientManager();
        const client = await manager.newClient('foobar');
        assert(manager.hasClient('foobar'));
        manager.removeClient('foobar');
    });

    it('should create a new client with random id if previous exists', async () => {
        const manager = new ClientManager();
        const clientA = await manager.newClient('foobar');
        const clientB = await manager.newClient('foobar');
        assert(clientA.id, 'foobar');
        assert(manager.hasClient(clientB.id));
        assert(clientB.id != clientA.id);
        manager.removeClient(clientB.id);
        manager.removeClient('foobar');
    });

    it('should remove client once it goes offline', async () => {
        const manager = new ClientManager();
        const client = await manager.newClient('foobar');

        const socket = await new Promise((resolve) => {
            const netClient = net.createConnection({ port: client.port }, () => {
                resolve(netClient);
            });
        });
        const closePromise = new Promise(resolve => socket.once('close', resolve));
        socket.end();
        await closePromise;

        // should still have client - grace period has not expired
        assert(manager.hasClient('foobar'));

        // wait past grace period (1s)
        await new Promise(resolve => setTimeout(resolve, 1500));
        assert(!manager.hasClient('foobar'));
    }).timeout(5000);
});