<?php

declare(strict_types=1);

namespace App\Support;

use App\Models\Setting;

final class ClientMenu
{
    public const SETTING_KEY = 'client_menu';

    public const HREF_PATTERN = '#^(/(?!/)|https?://)#i';

    public const ICON_PATTERN = '/^[a-z0-9-]+:[a-z0-9-]+$/i';

    /**
     * @return list<array{title: string, icon: ?string, href: ?string, disabled: bool, children: list<array{title: string, icon: ?string, href: string, disabled: bool}>}>
     */
    public static function items(): array
    {
        $value = json_decode((string) Setting::where('key', self::SETTING_KEY)->value('value'), true);

        return is_array($value) ? $value : [];
    }

    /**
     * @return array<string, mixed>
     */
    public static function rules(): array
    {
        return [
            'items'                       => 'present|array|max:30',
            'items.*'                     => 'array',
            'items.*.title'               => 'required|string|max:60',
            'items.*.icon'                => ['nullable', 'string', 'max:100', 'regex:' . self::ICON_PATTERN],
            'items.*.href'                => ['nullable', 'required_without:items.*.children', 'string', 'max:255', 'regex:' . self::HREF_PATTERN],
            'items.*.disabled'            => 'sometimes|boolean',
            'items.*.children'            => 'sometimes|array|max:20',
            'items.*.children.*.title'    => 'required|string|max:60',
            'items.*.children.*.icon'     => ['nullable', 'string', 'max:100', 'regex:' . self::ICON_PATTERN],
            'items.*.children.*.href'     => ['required', 'string', 'max:255', 'regex:' . self::HREF_PATTERN],
            'items.*.children.*.disabled' => 'sometimes|boolean',
        ];
    }

    /**
     * @param  array<int, array<string, mixed>>  $items
     */
    public static function save(array $items): array
    {
        $normalized = array_map(fn (array $item) => [
            ...self::normalizeLink($item),
            'children' => array_map(self::normalizeLink(...), array_values($item['children'] ?? [])),
        ], array_values($items));

        Setting::updateOrCreate(['key' => self::SETTING_KEY], ['value' => json_encode($normalized, JSON_UNESCAPED_UNICODE)]);

        return $normalized;
    }

    /**
     * @param  array<string, mixed>  $item
     * @return array{title: string, icon: ?string, href: ?string, disabled: bool}
     */
    public static function normalizeLink(array $item): array
    {
        return [
            'title'    => trim((string) $item['title']),
            'icon'     => ($item['icon'] ?? '') !== '' ? (string) $item['icon'] : null,
            'href'     => ($item['href'] ?? '') !== '' ? (string) $item['href'] : null,
            'disabled' => (bool) ($item['disabled'] ?? false),
        ];
    }
}