<?php

declare(strict_types=1);

namespace Monitor\Api\Tests\Realtime;

use Monitor\Api\Db\Database;
use Monitor\Api\Realtime\ChangeFeed;
use Monitor\Api\Repository\AgentRepository;
use Monitor\Api\Repository\EventRepository;
use Monitor\Api\Repository\KpiRepository;
use Monitor\Api\Repository\SystemRepository;
use Monitor\Api\Repository\TicketRepository;
use PHPUnit\Framework\TestCase;

final class ChangeFeedTest extends TestCase
{
    private ChangeFeed $changeFeed;
    private TicketRepository $tickets;
    private EventRepository $events;

    protected function setUp(): void
    {
        $db = Database::inMemory();
        $this->tickets = new TicketRepository($db);
        $this->events = new EventRepository($db);
        $systems = new SystemRepository($db);
        $kpis = new KpiRepository($db);
        $agents = new AgentRepository($db);

        $this->changeFeed = new ChangeFeed($this->tickets, $this->events, $systems, $kpis, $agents);
    }

    public function testCurrentFingerprintCoversAllFiveResources(): void
    {
        $fingerprint = $this->changeFeed->currentFingerprint();

        self::assertSame(['tickets', 'events', 'systems', 'kpis', 'agents'], array_keys($fingerprint));
    }

    public function testDiffIsEmptyWithoutChanges(): void
    {
        $fingerprint = $this->changeFeed->currentFingerprint();

        self::assertSame([], $this->changeFeed->diff($fingerprint, $fingerprint));
    }

    public function testDiffReportsOnlyTheChangedResource(): void
    {
        $before = $this->changeFeed->currentFingerprint();
        $this->tickets->create(['title' => 'Neu']);
        $after = $this->changeFeed->currentFingerprint();

        self::assertSame(['tickets'], $this->changeFeed->diff($before, $after));
    }

    public function testDiffReportsMultipleChangedResources(): void
    {
        $before = $this->changeFeed->currentFingerprint();
        $this->tickets->create(['title' => 'Neu']);
        $this->events->create(['name' => 'Ping', 'message' => 'down', 'severity' => 'error']);
        $after = $this->changeFeed->currentFingerprint();

        $changed = $this->changeFeed->diff($before, $after);
        sort($changed);
        self::assertSame(['events', 'tickets'], $changed);
    }
}