<?php

declare(strict_types=1);

namespace Blax\ReactPhpKernel\Tests;

use Blax\ReactPhpKernel\Support\ConnectionRegistry;
use PHPUnit\Framework\TestCase;

final class ConnectionRegistryTest extends TestCase
{
    public function test_add_get_has_and_count(): void
    {
        $registry = new ConnectionRegistry;
        $a = new \stdClass;
        $b = new \stdClass;

        $registry->add('a', $a);
        $registry->add('b', $b);

        $this->assertSame($a, $registry->get('a'));
        $this->assertTrue($registry->has('b'));
        $this->assertFalse($registry->has('c'));
        $this->assertNull($registry->get('c'));
        $this->assertCount(2, $registry);
        $this->assertSame(['a', 'b'], $registry->ids());
    }

    public function test_remove_is_idempotent_and_fires_listeners_once(): void
    {
        $registry = new ConnectionRegistry;
        $removed = [];
        $registry->onRemove(function (string $id) use (&$removed) {
            $removed[] = $id;
        });

        $registry->add('a', new \stdClass);
        $registry->remove('a');
        $registry->remove('a'); // no-op — must not fire again

        $this->assertSame(['a'], $removed);
        $this->assertCount(0, $registry);
    }

    public function test_on_add_listener_fires(): void
    {
        $registry = new ConnectionRegistry;
        $added = [];
        $registry->onAdd(function (string $id) use (&$added) {
            $added[] = $id;
        });

        $registry->add('x', new \stdClass);

        $this->assertSame(['x'], $added);
    }

    public function test_numeric_string_ids_survive_ids_each_and_clear(): void
    {
        // PHP coerces numeric-string array keys ("1") to int keys internally, which
        // used to hand ints to remove(string) during clear(). Regression guard.
        $registry = new ConnectionRegistry;
        $registry->add('1', new \stdClass);
        $registry->add('2', new \stdClass);

        $this->assertSame(['1', '2'], $registry->ids());

        $seen = [];
        $registry->each(function (object $conn, string $id) use (&$seen) {
            $seen[] = $id; // must receive strings, not ints
        });
        $this->assertSame(['1', '2'], $seen);

        $registry->clear(); // must not TypeError
        $this->assertCount(0, $registry);
    }

    public function test_each_visits_every_connection(): void
    {
        $registry = new ConnectionRegistry;
        $registry->add('a', new \stdClass);
        $registry->add('b', new \stdClass);

        $seen = [];
        $registry->each(function (object $conn, string $id) use (&$seen) {
            $seen[] = $id;
        });

        $this->assertSame(['a', 'b'], $seen);
    }

    public function test_clear_removes_all_and_fires_remove_for_each(): void
    {
        $registry = new ConnectionRegistry;
        $removed = [];
        $registry->onRemove(function (string $id) use (&$removed) {
            $removed[] = $id;
        });

        $registry->add('a', new \stdClass);
        $registry->add('b', new \stdClass);
        $registry->clear();

        $this->assertCount(0, $registry);
        $this->assertSame(['a', 'b'], $removed);
    }
}