<?php

namespace App\Tests\Entity;

use App\Entity\EmailTracking;
use PHPUnit\Framework\TestCase;

class EmailTrackingTest extends TestCase
{
    public function testConstructorSetsFields(): void
    {
        $tracking = new EmailTracking('msg-123', 'user@example.com', 'Hello');

        self::assertSame('msg-123', $tracking->getMessageId());
        self::assertSame('user@example.com', $tracking->getRecipient());
        self::assertSame('Hello', $tracking->getSubject());
        self::assertSame('sent', $tracking->getState());
        self::assertInstanceOf(\DateTimeImmutable::class, $tracking->getSentAt());
        self::assertNull($tracking->getOpenedAt());
        self::assertNull($tracking->getId());
    }

    public function testMarkAsOpenedTransitionsState(): void
    {
        $tracking = new EmailTracking('msg-123', 'user@example.com', 'Hello');
        $tracking->markAsOpened();

        self::assertSame('opened', $tracking->getState());
        self::assertInstanceOf(\DateTimeImmutable::class, $tracking->getOpenedAt());
    }

    public function testMarkAsOpenedDoesNotTransitionTwice(): void
    {
        $tracking = new EmailTracking('msg-123', 'user@example.com', 'Hello');
        $tracking->markAsOpened();
        $firstOpenedAt = $tracking->getOpenedAt();

        $tracking->markAsOpened();

        self::assertSame($firstOpenedAt, $tracking->getOpenedAt());
    }
}