<?php

namespace Tests\Unit;

use App\Services\AttributeCipher;
use App\Services\PanelSettingsService;
use PHPUnit\Framework\Attributes\Test;
use Tests\TestCase;

class AttributeCipherTest extends TestCase
{
    private function cipher(string $key): AttributeCipher
    {
        $settings = new class($key) extends PanelSettingsService
        {
            public function __construct(private string $k)
            {
                parent::__construct();
            }

            public function encryptionKey(): string
            {
                return $this->k;
            }
        };

        return new AttributeCipher($settings);
    }

    #[Test]
    public function it_round_trips_a_value_when_a_key_is_configured(): void
    {
        $cipher = $this->cipher('TajneHaslo123');

        $encrypted = $cipher->encrypt('p.zielinski.secret');

        $this->assertNotSame('p.zielinski.secret', $encrypted);
        $this->assertSame('p.zielinski.secret', $cipher->decrypt($encrypted));
    }

    #[Test]
    public function it_does_not_re_encrypt_an_already_encrypted_value(): void
    {
        $cipher = $this->cipher('TajneHaslo123');
        $encrypted = $cipher->encrypt('abc');

        $this->assertSame($encrypted, $cipher->encrypt($encrypted));
    }

    #[Test]
    public function it_passes_values_through_unchanged_when_no_key_is_configured(): void
    {
        $cipher = $this->cipher('');

        $this->assertSame('abc', $cipher->encrypt('abc'));
        $this->assertSame('abc', $cipher->decrypt('abc'));
        $this->assertFalse($cipher->isConfigured());
    }

    #[Test]
    public function it_returns_the_raw_value_when_it_cannot_be_decrypted(): void
    {
        $cipher = $this->cipher('TajneHaslo123');

        // Wartość nie w naszym formacie (np. wpisana ręcznie / inny klucz).
        $this->assertSame('not-our-ciphertext', $cipher->decrypt('not-our-ciphertext'));
    }

    #[Test]
    public function null_and_empty_values_are_left_alone(): void
    {
        $cipher = $this->cipher('TajneHaslo123');

        $this->assertNull($cipher->encrypt(null));
        $this->assertSame('', $cipher->encrypt(''));
        $this->assertNull($cipher->decrypt(null));
    }
}