<?php

namespace ArrayFunnel\Supports;

use ArrayFunnel\Supports\Traits\Singleton;

defined('ABSPATH') || exit;

/**
 * Runtime configuration registry.
 */
final class Config
{
    use Singleton;

    /**
     * Runtime configuration values.
     *
     * @var array<string, mixed>
     */
    private array $configData = [];

    public static function get(string $key, mixed $default = null): mixed
    {
        $data = self::instance()->configData;

        foreach (explode('.', $key) as $segment) {
            if (!is_array($data) || !array_key_exists($segment, $data)) {
                return $default;
            }
            $data = $data[$segment];
        }

        return $data;
    }

    public static function add(string $key, mixed $value): void
    {
        $data = &self::instance()->configData;
        $segments = explode('.', $key);

        foreach ($segments as $index => $segment) {
            if ($index === array_key_last($segments)) {
                $data[$segment] = $value;
                return;
            }

            if (!isset($data[$segment]) || !is_array($data[$segment])) {
                $data[$segment] = [];
            }
            $data = &$data[$segment];
        }
    }
}