<?php
declare(strict_types=1);
namespace App;

final class Config
{
    private function __construct(private array $a) {}

    public static function fromArray(array $a): self { return new self($a); }

    public function dbDsn(): string { return (string)($this->a['db_dsn'] ?? ''); }
    public function dbUser(): string { return (string)($this->a['db_user'] ?? ''); }
    public function dbPass(): string { return (string)($this->a['db_pass'] ?? ''); }
    public function snapshotDir(): string { return (string)($this->a['snapshot_dir'] ?? __DIR__ . '/../storage/snapshots'); }
    public function nonceTtl(): int { return (int)($this->a['nonce_ttl'] ?? 86400); }
    public function timestampWindow(): int { return (int)($this->a['timestamp_window'] ?? 300); }
    public function rateLimitPerMin(): int { return (int)($this->a['rate_limit_per_min'] ?? 60); }
    public function ingestIpRateLimitPerMin(): int { return (int)($this->a['ingest_ip_rate_limit_per_min'] ?? 300); }
    public function snapshotRetentionDays(): int { return (int)($this->a['snapshot_retention_days'] ?? 7); }
}