<?php

declare(strict_types=1);

namespace App\Tests\Config;

use App\Config\SeasonCalendar;
use PHPUnit\Framework\TestCase;

class SeasonCalendarTest extends TestCase
{
    private function winter(): SeasonCalendar
    {
        return new SeasonCalendar('11-01', '04-01');
    }

    /**
     * @dataProvider winterDates
     */
    public function testSeasonYearForTheWrappingWinterWindow(string $date, ?int $expected): void
    {
        $this->assertSame($expected, $this->winter()->seasonYearFor(new \DateTimeImmutable($date)));
    }

    public static function winterDates(): iterable
    {
        yield 'first day of the season' => ['2024-11-01', 2024];
        yield 'december, same calendar year' => ['2024-12-20', 2024];
        yield 'february, next calendar year' => ['2025-02-10', 2024];
        yield 'last day of the season is inclusive' => ['2025-04-01', 2024];
        yield 'time of day does not matter' => ['2025-04-01 23:59:00', 2024];
        yield 'day after the season ends' => ['2025-04-02', null];
        yield 'high summer' => ['2025-07-15', null];
        yield 'day before the next season starts' => ['2025-10-31', null];
        yield 'start of the following season' => ['2025-11-01', 2025];
    }

    public function testLabel(): void
    {
        $calendar = $this->winter();

        $this->assertSame('Saison 2024/25', $calendar->label(2024));
        $this->assertSame('Saison 2009/10', $calendar->label(2009));
        $this->assertSame('außerhalb der Saison', $calendar->label(null));
    }

    /**
     * @dataProvider summerDates
     */
    public function testSeasonYearForANonWrappingWindow(string $date, ?int $expected): void
    {
        $calendar = new SeasonCalendar('06-01', '09-01');

        $this->assertSame($expected, $calendar->seasonYearFor(new \DateTimeImmutable($date)));
    }

    public static function summerDates(): iterable
    {
        yield 'before the window' => ['2025-05-31', null];
        yield 'first day' => ['2025-06-01', 2025];
        yield 'inside' => ['2025-07-15', 2025];
        yield 'last day' => ['2025-09-01', 2025];
        yield 'after the window' => ['2025-09-02', null];
        yield 'turn of the year is not in season' => ['2025-01-01', null];
    }

    public function testAnInvalidBoundaryIsRejected(): void
    {
        $this->expectException(\InvalidArgumentException::class);

        (new SeasonCalendar('xx-yy', '04-01'))->seasonYearFor(new \DateTimeImmutable('2025-01-01'));
    }
}