<?php

declare(strict_types=1);

namespace App\Tests\Service\Rtt;

use App\Entity\Contract;
use App\Service\Rtt\RttRecoveryComputationService;
use PHPUnit\Framework\TestCase;
use ReflectionClass;

/**
 * The service constructor takes several final-class collaborators that PHPUnit cannot
 * double. Pure helpers are exercised via newInstanceWithoutConstructor + reflection.
 *
 * @internal
 */
final class RttRecoveryComputationServiceTest extends TestCase
{
    public function testResolveWeekAnchorDateReturnsFirstContractedDayWhenWeekStartsBeforeHire(): void
    {
        $service  = new ReflectionClass(RttRecoveryComputationService::class)->newInstanceWithoutConstructor();
        $contract = new Contract();

        $weekDays        = ['2026-03-16', '2026-03-17', '2026-03-18', '2026-03-19', '2026-03-20', '2026-03-21', '2026-03-22'];
        $contractsByDate = [
            '2026-03-16' => null,
            '2026-03-17' => null,
            '2026-03-18' => null,
            '2026-03-19' => $contract,
            '2026-03-20' => $contract,
            '2026-03-21' => $contract,
            '2026-03-22' => $contract,
        ];

        $anchor = $this->invokePrivate($service, 'resolveWeekAnchorDate', $weekDays, $contractsByDate);

        self::assertSame('2026-03-19', $anchor);
    }

    public function testResolveWeekAnchorDateReturnsFirstDayWhenItIsContracted(): void
    {
        $service  = new ReflectionClass(RttRecoveryComputationService::class)->newInstanceWithoutConstructor();
        $contract = new Contract();

        $weekDays        = ['2026-03-23', '2026-03-24', '2026-03-25'];
        $contractsByDate = [
            '2026-03-23' => $contract,
            '2026-03-24' => $contract,
            '2026-03-25' => $contract,
        ];

        $anchor = $this->invokePrivate($service, 'resolveWeekAnchorDate', $weekDays, $contractsByDate);

        self::assertSame('2026-03-23', $anchor);
    }

    public function testResolveWeekAnchorDateFallsBackToFirstDayWhenNoContract(): void
    {
        $service = new ReflectionClass(RttRecoveryComputationService::class)->newInstanceWithoutConstructor();

        $weekDays        = ['2026-03-16', '2026-03-17'];
        $contractsByDate = ['2026-03-16' => null, '2026-03-17' => null];

        $anchor = $this->invokePrivate($service, 'resolveWeekAnchorDate', $weekDays, $contractsByDate);

        self::assertSame('2026-03-16', $anchor);
    }

    private function invokePrivate(object $obj, string $method, mixed ...$args): mixed
    {
        return new ReflectionClass($obj::class)->getMethod($method)->invoke($obj, ...$args);
    }
}