<?php

declare(strict_types=1);

namespace App\Tests\Service;

use App\Entity\Groups\AccommodationPrice;
use App\Service\GroupsPriceCalculator;
use App\Service\PriceTimelineBuilder;
use PHPUnit\Framework\TestCase;

class GroupsPriceCalculatorTest extends TestCase
{
    private const int NIGHTS = 3;

    public function testFreeBoardDoesNotTriggerUndersubscriptionSurcharge(): void
    {
        $result = $this->calculate(30, 0);

        self::assertSame(0, $result['undersubscriptionSurcharge']);
        self::assertNull($result['undersubscriptionThreshold']);
        self::assertSame(0, $result['boardPrice']);
    }

    public function testNoBoardDoesNotTriggerUndersubscriptionSurcharge(): void
    {
        $result = $this->calculate(30, null);

        self::assertSame(0, $result['undersubscriptionSurcharge']);
        self::assertNull($result['undersubscriptionThreshold']);
        self::assertSame(0, $result['boardPrice']);
    }

    public function testPaidBoardBelow40TriggersTheLowerThresholdSurcharge(): void
    {
        $result = $this->calculate(30, 1500);

        self::assertSame(30 * 500 * self::NIGHTS, $result['undersubscriptionSurcharge']);
        self::assertSame(40, $result['undersubscriptionThreshold']);
        self::assertSame(1500 * 30 * self::NIGHTS, $result['boardPrice']);
    }

    public function testPaidBoardBelow50TriggersTheUpperThresholdSurcharge(): void
    {
        $result = $this->calculate(45, 1500);

        self::assertSame(45 * 250 * self::NIGHTS, $result['undersubscriptionSurcharge']);
        self::assertSame(50, $result['undersubscriptionThreshold']);
    }

    /**
     * @return array<string, mixed>
     */
    private function calculate(int $paxCount, ?int $boardServicePrice): array
    {
        $dateFrom = new \DateTimeImmutable('2026-07-01');
        $dateTo = $dateFrom->modify(sprintf('+%d days', self::NIGHTS));

        $price = (new AccommodationPrice())
            ->setDateFrom($dateFrom->modify('-1 month'))
            ->setDateTo($dateTo->modify('+1 month'))
            ->setIncludedPax(20)
            ->setPricePerNight(100_00)
            ->setPriceAdditionalPerson(10_00)
            ->setMinNights(1);

        $calculator = new GroupsPriceCalculator(new PriceTimelineBuilder(), [
            'runningCostsEur' => 0,
            'runningCostsChf' => 0,
            'undersubscription30Eur' => 5.0,
            'undersubscription30Chf' => 6.0,
            'undersubscription40Eur' => 2.5,
            'undersubscription40Chf' => 3.0,
        ]);

        return $calculator->calculateFromSnapshots(
            $paxCount,
            0,
            self::NIGHTS,
            $dateFrom,
            $dateTo,
            [$price],
            $boardServicePrice,
            [],
            'EUR',
        );
    }
}