<?php

declare(strict_types=1);

namespace UploadLogger\Core;

/**
 * Simple immutable configuration holder for UploadShield (uploadshield.json).
 */
final class Config
{
    /** @var array<string, mixed> */
    private array $data;

    /**
     * @param array<string, mixed> $data
     */
    public function __construct(array $data = [])
    {
        $this->data = $data;
    }

    /**
     * Check whether a module is enabled.
     */
    public function isModuleEnabled(string $name): bool
    {
        $modules = $this->data['modules'] ?? [];
        if (!is_array($modules)) return false;
        return !empty($modules[$name]);
    }

    /**
     * Get a value with optional default.
     * @param mixed $default
     * @return mixed
     */
    public function get(string $key, mixed $default = null): mixed
    {
        // Support simple dot-notation for nested keys, e.g. "limits.max_size"
        if (strpos($key, '.') === false) {
            return $this->data[$key] ?? $default;
        }

        $parts = explode('.', $key);
        $cur = $this->data;
        foreach ($parts as $p) {
            if (!is_array($cur) || !array_key_exists($p, $cur)) {
                return $default;
            }
            $cur = $cur[$p];
        }
        return $cur;
    }

    /**
     * Return the raw config array.
     * @return array<string,mixed>
     */
    public function toArray(): array
    {
        return $this->data;
    }
}