<?php

declare(strict_types=1);

namespace App\Framework\Database;

use App\Framework\Async\AsyncService;
use App\Framework\Database\Contracts\AsyncCapable;

/**
 * Decorator der jede ConnectionInterface-Implementierung um async Property erweitert
 *
 * Usage: $db->async->queryMultiple([...])
 */
final readonly class AsyncAwareConnection implements ConnectionInterface, AsyncCapable
{
    private AsyncDatabaseAdapter $asyncAdapter;

    public function __construct(
        private ConnectionInterface $connection,
        private AsyncService $asyncService
    ) {
        $this->asyncAdapter = new AsyncDatabaseAdapter($this->connection, $this->asyncService);
    }

    // === STANDARD CONNECTION INTERFACE (Delegation) ===

    public function execute(string $sql, array $parameters = []): int
    {
        return $this->connection->execute($sql, $parameters);
    }

    public function query(string $sql, array $parameters = []): ResultInterface
    {
        return $this->connection->query($sql, $parameters);
    }

    public function queryOne(string $sql, array $parameters = []): ?array
    {
        return $this->connection->queryOne($sql, $parameters);
    }

    public function queryColumn(string $sql, array $parameters = []): array
    {
        return $this->connection->queryColumn($sql, $parameters);
    }

    public function queryScalar(string $sql, array $parameters = []): mixed
    {
        return $this->connection->queryScalar($sql, $parameters);
    }

    public function beginTransaction(): void
    {
        $this->connection->beginTransaction();
    }

    public function commit(): void
    {
        $this->connection->commit();
    }

    public function rollback(): void
    {
        $this->connection->rollback();
    }

    public function inTransaction(): bool
    {
        return $this->connection->inTransaction();
    }

    public function lastInsertId(): string
    {
        return $this->connection->lastInsertId();
    }

    public function getPdo(): \PDO
    {
        return $this->connection->getPdo();
    }

    // === ASYNC CAPABILITY ===

    /**
     * Get async adapter for parallel operations
     */
    public function async(): AsyncDatabaseAdapter
    {
        return $this->asyncAdapter;
    }

    /**
     * Get wrapped connection instance
     */
    public function getWrappedConnection(): ConnectionInterface
    {
        return $this->connection;
    }

    /**
     * Get statistics including async metrics
     */
    public function getStats(): array
    {
        $baseStats = method_exists($this->connection, 'getStatistics') ? $this->connection->getStatistics() : [];

        return array_merge($baseStats, [
            'async_enabled' => true,
            'async_stats' => $this->asyncAdapter->getStats(),
            'connection_type' => get_class($this->connection),
            'supports_read_replicas' => $this->connection instanceof ReadWriteConnection,
        ]);
    }
}