<?php

declare(strict_types=1);

namespace Monitor\Api\Tests\Repository;

use Monitor\Api\Db\Database;
use Monitor\Api\Repository\KpiRepository;
use PHPUnit\Framework\TestCase;

final class KpiRepositoryTest extends TestCase
{
    private KpiRepository $repository;

    protected function setUp(): void
    {
        $this->repository = new KpiRepository(Database::inMemory(), historyLimit: 3);
    }

    public function testReportCreatesKpiWithCurrentValue(): void
    {
        $kpi = $this->repository->report('open_tickets', 5.0, 'Offene Tickets', 'count', '2026-01-01T00:00:00Z');

        self::assertSame('open_tickets', $kpi['key']);
        self::assertSame(5.0, $kpi['current_value']);
        self::assertCount(1, $kpi['history']);
    }

    public function testReportAppendsHistoryAndUpdatesCurrentValue(): void
    {
        $this->repository->report('open_tickets', 5.0, null, null, '2026-01-01T00:00:00Z');
        $kpi = $this->repository->report('open_tickets', 7.0, null, null, '2026-01-02T00:00:00Z');

        self::assertSame(7.0, $kpi['current_value']);
        self::assertCount(2, $kpi['history']);
    }

    public function testHistoryIsLimited(): void
    {
        for ($i = 0; $i < 5; $i++) {
            $this->repository->report('kpi', (float) $i, null, null, sprintf('2026-01-0%dT00:00:00Z', $i + 1));
        }

        $kpi = $this->repository->find('kpi');

        self::assertCount(3, $kpi['history']);
    }

    public function testFindReturnsNullForUnknownKey(): void
    {
        self::assertNull($this->repository->find('unknown'));
    }

    public function testAllListsAllKpis(): void
    {
        $this->repository->report('a', 1.0, null, null, '2026-01-01T00:00:00Z');
        $this->repository->report('b', 2.0, null, null, '2026-01-01T00:00:00Z');

        self::assertCount(2, $this->repository->all());
    }

    public function testFingerprintChangesWhenAValueIsReported(): void
    {
        $before = $this->repository->fingerprint();
        $this->repository->report('open_tickets', 1.0, null, null, '2026-01-01T00:00:00Z');

        self::assertNotSame($before, $this->repository->fingerprint());
    }
}