<?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);
    }

    public function testResolveOvertime25BandWidthIs4hForH39(): void
    {
        $service  = new ReflectionClass(RttRecoveryComputationService::class)->newInstanceWithoutConstructor();
        $contract = new Contract()->setWeeklyHours(39);

        self::assertSame(4 * 60, $this->invokePrivate($service, 'resolveOvertime25BandWidthMinutes', $contract));
    }

    public function testResolveOvertime25BandWidthIs8hForH35(): void
    {
        $service  = new ReflectionClass(RttRecoveryComputationService::class)->newInstanceWithoutConstructor();
        $contract = new Contract()->setWeeklyHours(35);

        self::assertSame(8 * 60, $this->invokePrivate($service, 'resolveOvertime25BandWidthMinutes', $contract));
    }

    /**
     * Dylan Chaboisson, semaine 12 : embauché le jeudi sur un contrat 39h.
     * Total travaillé 22h (1320 min), départ 25 % proraté aux jours contractés = 15h (900 min),
     * plafond 25 %/50 % = 15h + bande 4h = 19h (1140 min). Le plafond se décale avec
     * l'embauche au lieu de rester bloqué à 43h, ouvrant la tranche 50 %.
     */
    public function testMidWeekHireSplitsOvertimeAcross25And50(): void
    {
        $service = new ReflectionClass(RttRecoveryComputationService::class)->newInstanceWithoutConstructor();

        [$base25, $base50] = $this->invokePrivate($service, 'computeOvertimeBaseMinutes', 1320, 900, 1140);

        self::assertSame(4 * 60, $base25);
        self::assertSame(3 * 60, $base50);
    }

    /**
     * Régression : semaine pleine 39h (départ 39h, plafond 43h), 46h travaillées →
     * 4h à 25 % (39→43) et 3h à 50 % (43→46), comportement inchangé.
     */
    public function testFullWeekOvertimeSplitUnchanged(): void
    {
        $service = new ReflectionClass(RttRecoveryComputationService::class)->newInstanceWithoutConstructor();

        [$base25, $base50] = $this->invokePrivate($service, 'computeOvertimeBaseMinutes', 2760, 2340, 2580);

        self::assertSame(4 * 60, $base25);
        self::assertSame(3 * 60, $base50);
    }

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