<?php

declare(strict_types=1);

namespace Tests\Unit\Shared\ValueObjects;

use Shared\Helpers\DatesHelper;
use Shared\Helpers\Exceptions\InvalidDateFormatException;
use Shared\ValueObjects\DateTime;

covers(DateTime::class);

describe('date time', function (): void {
    it('accepts a DateTimeInterface instance and normalizes it to UTC', function (): void {
        // GIVEN
        $paris = new \DateTimeImmutable('2026-06-15 14:00:00', new \DateTimeZone('Europe/Paris'));

        // WHEN
        $dateTime = new DateTime($paris);

        // THEN
        expect($dateTime->value)->toBeInstanceOf(\DateTimeImmutable::class)
            ->and($dateTime->value->getTimezone()->getName())->toBe('UTC')
            ->and($dateTime->value->format('H:i:s'))->toBe('12:00:00');
    });

    it('parses a valid date string', function (): void {
        // WHEN
        $dateTime = new DateTime('2026-01-15');

        // THEN
        expect($dateTime->value->format('Y-m-d'))->toBe('2026-01-15');
    });

    it('rejects an invalid date string', function (): void {
        // WHEN
        $action = fn (): DateTime => new DateTime('not-a-date');

        // THEN
        expect($action)->toThrow(InvalidDateFormatException::class);
    });

    it('creates the current instant via now', function (): void {
        // GIVEN
        \Carbon\CarbonImmutable::setTestNow('2026-06-15T12:00:00Z');

        // WHEN
        $dateTime = DateTime::now();

        // THEN
        expect($dateTime)->toBeInstanceOf(DateTime::class)
            ->and($dateTime->value->getTimezone()->getName())->toBe('UTC')
            ->and($dateTime->value->format(\DateTimeInterface::ATOM))->toBe('2026-06-15T12:00:00+00:00');

        // TEARDOWN
        \Carbon\CarbonImmutable::setTestNow();
    });

    it('implements equals correctly', function (): void {
        // GIVEN
        $a = new DateTime('2026-01-15T10:00:00Z');
        $b = new DateTime('2026-01-15T10:00:00Z');
        $c = new DateTime('2026-01-16T10:00:00Z');

        // THEN
        expect($a->equals($b))->toBeTrue()
            ->and($a->equals($c))->toBeFalse()
            ->and($a->equals(null))->toBeFalse();
    });

    it('converts to a RFC3339 string', function (): void {
        // GIVEN
        $dateTime = new DateTime('2026-01-15T10:00:00Z');

        // THEN
        expect((string) $dateTime)->toBe(DatesHelper::toRfc3339($dateTime->value));
    });

    it('serializes to json as a RFC3339 string', function (): void {
        // GIVEN
        $dateTime = new DateTime('2026-01-15T10:00:00Z');

        // THEN
        expect($dateTime->jsonSerialize())->toBe((string) $dateTime);
    });
});