<?php

declare(strict_types=1);

namespace App\Tests\Functional\Scolarite\Infrastructure\EventHandler;

use App\Scolarite\Domain\Event\NoteModifiee;
use App\Scolarite\Domain\Event\NoteSaisie;
use App\Scolarite\Domain\Model\Grade\GradeId;
use App\Scolarite\Infrastructure\EventHandler\AuditGradeEventsHandler;
use DateTimeImmutable;
use Doctrine\DBAL\Connection;

use const JSON_THROW_ON_ERROR;

use PHPUnit\Framework\Attributes\Test;
use Ramsey\Uuid\Uuid;
use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;

/**
 * Vérifie le bout-en-bout de l'audit des événements Grade : le handler,
 * connecté à l'AuditLogger réel et à la base, écrit une ligne immuable
 * dans `audit_log` avec le bon payload (création / diff).
 */
final class AuditGradeEventsHandlerFunctionalTest extends KernelTestCase
{
    private Connection $connection;
    private AuditGradeEventsHandler $handler;

    protected function setUp(): void
    {
        self::bootKernel();

        /** @var Connection $connection */
        $connection = static::getContainer()->get(Connection::class);
        $this->connection = $connection;

        /** @var AuditGradeEventsHandler $handler */
        $handler = static::getContainer()->get(AuditGradeEventsHandler::class);
        $this->handler = $handler;
    }

    protected function tearDown(): void
    {
        // audit_log est append-only : pas de DELETE possible, on filtre par UUID unique dans chaque test
        parent::tearDown();
    }

    #[Test]
    public function handleNoteSaisieWritesAuditEntryToDatabase(): void
    {
        $gradeId = GradeId::generate();
        $evaluationId = Uuid::uuid4()->toString();
        $studentId = Uuid::uuid4()->toString();
        $createdBy = Uuid::uuid4()->toString();

        $event = new NoteSaisie(
            gradeId: $gradeId,
            evaluationId: $evaluationId,
            studentId: $studentId,
            value: 15.5,
            status: 'draft',
            createdBy: $createdBy,
            occurredOn: new DateTimeImmutable(),
        );

        $this->handler->handleNoteSaisie($event);

        $entry = $this->connection->fetchAssociative(
            'SELECT * FROM audit_log WHERE aggregate_id = ? AND event_type = ? ORDER BY occurred_at DESC LIMIT 1',
            [$gradeId->value->toString(), 'NoteSaisie'],
        );

        self::assertNotFalse($entry, 'Audit log entry should exist after NoteSaisie');
        self::assertSame('Grade', $entry['aggregate_type']);

        $payload = self::decodePayload($entry['payload']);
        self::assertSame([], $payload['old_values']);
        self::assertSame($evaluationId, $payload['new_values']['evaluation_id']);
        self::assertSame($studentId, $payload['new_values']['student_id']);
        self::assertSame(15.5, $payload['new_values']['value']);
        self::assertSame('draft', $payload['new_values']['status']);
        self::assertSame($createdBy, $payload['new_values']['created_by']);

        self::assertArrayHasKey('metadata', $entry);
        $metadata = self::decodePayload($entry['metadata']);
        self::assertArrayHasKey('correlation_id', $metadata);
        self::assertArrayHasKey('occurred_at', $metadata);
    }

    #[Test]
    public function handleNoteModifieeWritesAuditEntryWithDiff(): void
    {
        $gradeId = GradeId::generate();
        $evaluationId = Uuid::uuid4()->toString();
        $studentId = Uuid::uuid4()->toString();
        $modifiedBy = Uuid::uuid4()->toString();

        $event = new NoteModifiee(
            gradeId: $gradeId,
            evaluationId: $evaluationId,
            studentId: $studentId,
            oldValue: 12.0,
            newValue: 14.5,
            oldStatus: 'draft',
            newStatus: 'published',
            modifiedBy: $modifiedBy,
            occurredOn: new DateTimeImmutable(),
        );

        $this->handler->handleNoteModifiee($event);

        $entry = $this->connection->fetchAssociative(
            'SELECT * FROM audit_log WHERE aggregate_id = ? AND event_type = ? ORDER BY occurred_at DESC LIMIT 1',
            [$gradeId->value->toString(), 'NoteModifiee'],
        );

        self::assertNotFalse($entry, 'Audit log entry should exist after NoteModifiee');
        self::assertSame('Grade', $entry['aggregate_type']);

        $payload = self::decodePayload($entry['payload']);
        self::assertSame(['value' => 12.0, 'status' => 'draft'], $payload['old_values']);
        self::assertSame(14.5, $payload['new_values']['value']);
        self::assertSame('published', $payload['new_values']['status']);
        self::assertSame($modifiedBy, $payload['new_values']['modified_by']);
        self::assertSame($evaluationId, $payload['new_values']['evaluation_id']);
        self::assertSame($studentId, $payload['new_values']['student_id']);
    }

    /**
     * @return array<string, mixed>
     */
    private static function decodePayload(mixed $raw): array
    {
        self::assertIsString($raw);

        /** @var array<string, mixed> $decoded */
        $decoded = json_decode($raw, true, 512, JSON_THROW_ON_ERROR);

        return $decoded;
    }
}