<?php

namespace Tests\Framework\DateTime;

use App\Framework\DateTime\DateTimeFormatter;

class DateTimeFormatterTest extends \PHPUnit\Framework\TestCase
{
    private \DateTimeImmutable $sampleDate;
    private DateTimeFormatter $formatter;

    protected function setUp(): void
    {
        $this->sampleDate = new \DateTimeImmutable('2021-01-01 12:34:56', new \DateTimeZone('UTC'));
        $this->formatter = new DateTimeFormatter();
    }

    public function testFormatIso8601(): void
    {
        $formatted = $this->formatter->formatIso8601($this->sampleDate);
        $this->assertEquals('2021-01-01T12:34:56+00:00', $formatted);
    }

    public function testFormatSql(): void
    {
        $formatted = $this->formatter->formatSql($this->sampleDate);
        $this->assertEquals('2021-01-01 12:34:56', $formatted);
    }

    public function testFormatDate(): void
    {
        $formatted = $this->formatter->formatDate($this->sampleDate);
        $this->assertEquals('2021-01-01', $formatted);
    }

    public function testFormatTime(): void
    {
        $formatted = $this->formatter->formatTime($this->sampleDate);
        $this->assertEquals('12:34:56', $formatted);
    }

    public function testCustomFormat(): void
    {
        $formatted = $this->formatter->format($this->sampleDate, 'd.m.Y H:i');
        $this->assertEquals('01.01.2021 12:34', $formatted);
    }

    public function testWithCustomTimezone(): void
    {
        $formatter = new DateTimeFormatter('Europe/Berlin');
        $formatted = $formatter->format($this->sampleDate, 'Y-m-d H:i:s T');

        // UTC 12:34:56 sollte in Berlin 13:34:56 sein (während Standardzeit/Winterzeit)
        $this->assertEquals('2021-01-01 13:34:56 CET', $formatted);
    }

    public function testWithDateTimeObject(): void
    {
        $dateTime = new \DateTime('2021-01-01 12:34:56', new \DateTimeZone('UTC'));
        $formatted = $this->formatter->formatIso8601($dateTime);

        $this->assertEquals('2021-01-01T12:34:56+00:00', $formatted);
    }
}