<?php

declare(strict_types=1);

namespace Blax\WebRtc\Tests;

use Blax\WebRtc\Rooms\RoomManager;
use PHPUnit\Framework\TestCase;

final class RoomManagerTest extends TestCase
{
    public function test_first_joiner_meshes_with_nobody(): void
    {
        $rooms = new RoomManager;

        $this->assertSame([], $rooms->join('lobby', 'p1'));
        $this->assertSame(['p1'], $rooms->peersIn('lobby'));
        $this->assertSame('lobby', $rooms->roomOf('p1'));
    }

    public function test_second_joiner_meshes_with_the_first(): void
    {
        $rooms = new RoomManager;
        $rooms->join('lobby', 'p1');

        $this->assertSame(['p1'], $rooms->join('lobby', 'p2'));
        $this->assertSame(['p1', 'p2'], $rooms->peersIn('lobby'));
    }

    public function test_leaving_returns_remaining_and_drops_empty_rooms(): void
    {
        $rooms = new RoomManager;
        $rooms->join('lobby', 'p1');
        $rooms->join('lobby', 'p2');

        $this->assertSame(['p1'], $rooms->leave('p2'));
        $this->assertSame([], $rooms->leave('p1')); // room now empty
        $this->assertSame(0, $rooms->count());
        $this->assertNull($rooms->room('lobby'));
    }

    public function test_joining_a_new_room_leaves_the_old(): void
    {
        $rooms = new RoomManager;
        $rooms->join('a', 'p1');
        $rooms->join('b', 'p1');

        $this->assertSame([], $rooms->peersIn('a')); // 'a' emptied + dropped
        $this->assertSame(['p1'], $rooms->peersIn('b'));
        $this->assertSame('b', $rooms->roomOf('p1'));
    }
}