<?php

declare(strict_types=1);

namespace Tests\Unit\Framework\Logging;

use App\Framework\Logging\ValueObjects\CorrelationId;
use PHPUnit\Framework\TestCase;

final class CorrelationIdTest extends TestCase
{
    public function test_creates_from_string(): void
    {
        $id = CorrelationId::fromString('test-correlation-id-123');

        $this->assertEquals('test-correlation-id-123', $id->toString());
        $this->assertEquals('test-correlation-id-123', (string) $id);
    }

    public function test_generates_uuid_format(): void
    {
        $id = CorrelationId::generate();

        $this->assertTrue($id->isUuid());
        $this->assertFalse($id->isUlid());
        $this->assertMatchesRegularExpression(
            '/^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i',
            $id->toString()
        );
    }

    public function test_generates_ulid_format(): void
    {
        $id = CorrelationId::generateUlid();

        $this->assertTrue($id->isUlid());
        $this->assertFalse($id->isUuid());
        $this->assertEquals(26, strlen($id->toString()));
    }

    public function test_rejects_empty_string(): void
    {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('cannot be empty');

        CorrelationId::fromString('');
    }

    public function test_rejects_too_long_string(): void
    {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('too long');

        CorrelationId::fromString(str_repeat('a', 256));
    }

    public function test_rejects_invalid_characters(): void
    {
        $this->expectException(\InvalidArgumentException::class);
        $this->expectExceptionMessage('invalid characters');

        CorrelationId::fromString('test-id-with-invalid-chars-äöü');
    }

    public function test_allows_valid_characters(): void
    {
        $validIds = [
            'simple-id-123',
            'UPPERCASE-ID-456',
            'mixed_Case-ID_789',
            '12345-67890',
            'a_b-c_d-e_f',
        ];

        foreach ($validIds as $validId) {
            $id = CorrelationId::fromString($validId);
            $this->assertEquals($validId, $id->toString());
        }
    }

    public function test_to_short_string(): void
    {
        $id = CorrelationId::fromString('very-long-correlation-id-123456789');

        $this->assertEquals('very-lon', $id->toShortString());
    }

    public function test_equals(): void
    {
        $id1 = CorrelationId::fromString('test-123');
        $id2 = CorrelationId::fromString('test-123');
        $id3 = CorrelationId::fromString('test-456');

        $this->assertTrue($id1->equals($id2));
        $this->assertFalse($id1->equals($id3));
    }

    public function test_json_serializable(): void
    {
        $id = CorrelationId::fromString('test-json-123');

        $json = json_encode(['id' => $id]);

        $this->assertEquals('{"id":"test-json-123"}', $json);
    }

    public function test_from_globals_with_correlation_header(): void
    {
        $_SERVER['HTTP_X_CORRELATION_ID'] = 'header-correlation-123';

        $id = CorrelationId::fromGlobals();

        $this->assertEquals('header-correlation-123', $id->toString());

        unset($_SERVER['HTTP_X_CORRELATION_ID']);
    }

    public function test_from_globals_fallback_to_request_id(): void
    {
        $_SERVER['HTTP_X_REQUEST_ID'] = 'request-id-456';

        $id = CorrelationId::fromGlobals('X-Correlation-ID');

        $this->assertEquals('request-id-456', $id->toString());

        unset($_SERVER['HTTP_X_REQUEST_ID']);
    }

    public function test_from_globals_generates_when_no_header(): void
    {
        unset($_SERVER['HTTP_X_CORRELATION_ID'], $_SERVER['HTTP_X_REQUEST_ID']);

        $id = CorrelationId::fromGlobals();

        $this->assertTrue($id->isUuid());
    }

    public function test_from_globals_generates_when_invalid_header(): void
    {
        $_SERVER['HTTP_X_CORRELATION_ID'] = 'invalid-chars-äöü';

        $id = CorrelationId::fromGlobals();

        // Should generate new valid ID instead of using invalid one
        $this->assertTrue($id->isUuid());
        $this->assertNotEquals('invalid-chars-äöü', $id->toString());

        unset($_SERVER['HTTP_X_CORRELATION_ID']);
    }

    public function test_creates_from_uuid(): void
    {
        $uuid = \Ramsey\Uuid\Uuid::uuid4();
        $id = CorrelationId::fromUuid($uuid);

        $this->assertEquals($uuid->toString(), $id->toString());
        $this->assertTrue($id->isUuid());
    }

    public function test_creates_from_ulid(): void
    {
        $ulid = \App\Framework\Ulid\Ulid::generate();
        $id = CorrelationId::fromUlid($ulid);

        $this->assertEquals((string) $ulid, $id->toString());
        $this->assertTrue($id->isUlid());
    }
}