<?php

namespace App;

use App\Enums\ConfigKey;
use App\Models\Config;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Cache;

class Utils
{
    /**
     * 获取系统配置，获取全部配置时将返回
     *
     * @param  string  $name
     * @param  mixed|null  $default
     *
     * @return mixed
     */
    public static function config(string $name = '', mixed $default = null): mixed
    {
        /** @var Collection $configs */
        $configs = Cache::rememberForever('configs', function () {
            return Config::query()->pluck('value', 'name')->transform(function ($value, $key) {
                switch ($key) {
                    case ConfigKey::IsAllowGuestUpload:
                    case ConfigKey::IsEnableGallery:
                    case ConfigKey::IsEnableRegistration:
                    case ConfigKey::IsUserNeedVerify:
                        $value = (bool) $value;
                        break;
                    case ConfigKey::MailConfigs:
                    case ConfigKey::GroupConfigs:
                        $value = collect(json_decode($value, true));
                        break;
                    case ConfigKey::UserInitialCapacity:
                        $value = sprintf('%.2f', $value);
                        break;
                    default:
                }
                return $value;
            });
        });
        return '' === $name ? $configs : $configs->get($name, $default);
    }

    /**
     * 转换字段单位
     *
     * @param  int|float  $size  字节b
     * @return string
     */
    public static function formatSize(int|float $size): string
    {
        if ($size <= 0) {
            return "0.00 Bytes";
        }
        $unit = ['', 'K', 'M', 'G', 'T', 'P'];
        $base = 1024;
        $i = floor(log($size, $base));
        $n = count($unit);
        if ($i >= $n) {
            $i = $n - 1;
        }

        return sprintf("%.2f", $size / pow($base, $i)).' '.$unit[$i].'B';
    }

    /**
     * 递归过滤数组元素
     *
     * @param  array  $array
     * @param  callable|null  $callback
     * @param  int  $mode
     * @return array
     */
    public static function filter(array $array, callable $callback = null, int $mode = 0): array
    {
        foreach ($array as &$value) {
            if (is_array($value)) {
                $value = self::filter($value);
            }
        }
        return array_filter($array, $callback, $mode);
    }

    /**
     * 格式化配置，设置默认配置以及将字符串数字转换为数字
     *
     * @param array $defaults 默认配置
     * @param array $configs 新配置
     * @return array
     */
    public static function parseConfigs(array $defaults, array $configs): array
    {
        $array = array_replace_recursive($defaults, Utils::filter($configs));
        array_walk_recursive($array, function (&$item) {
            if (ctype_digit($item)) {
                $item += 0;
            }
            if (is_null($item)) {
                unset($item);
            }
        });
        return $array;
    }
}