<?php

declare(strict_types=1);

namespace App\Filament\Support;

use Closure;
use Filament\Schemas\Components\Tabs;
use Filament\Schemas\Components\Tabs\Tab;

/**
 * Renders one tab per supported locale for a model's translatable fields.
 *
 * This leans on how spatie/laravel-translatable already behaves rather than
 * adding a translation layer of its own: `toArray()` hands Filament the full
 * locale => value map, and assigning that map back through `setAttribute`
 * writes each translation. So a field whose state path is "title.ca" hydrates
 * and saves the Catalan translation with no extra wiring.
 */
final class TranslatableTabs
{
    /**
     * @param  Closure(string $locale, bool $isDefault): array<int, mixed>  $fields
     *                                                                               Receives the locale code and whether it is the primary one,
     *                                                                               and returns the components for that tab.
     */
    public static function make(Closure $fields, ?string $label = null): Tabs
    {
        $default = (string) config('locales.default');

        $tabs = [];

        foreach (config('locales.supported') as $locale => $meta) {
            $tabs[] = Tab::make($locale)
                ->label(trim(($meta['flag'] ?? '').' '.($meta['native'] ?? $locale)))
                // Marks the primary language, the one every other tab falls
                // back to when left empty.
                ->badge($locale === $default ? '★' : null)
                ->schema($fields($locale, $locale === $default));
        }

        $tabs = Tabs::make($label ?? __('panel.pages.fields.translations'))
            ->tabs($tabs)
            ->columnSpanFull();

        // Open the tab for the language the admin is currently working in.
        return $tabs->persistTabInQueryString('locale_tab');
    }

    /**
     * Suffix for a field label inside a locale tab, e.g. "Título (Català)".
     * Useful when a field sits outside the tabs but still targets one locale.
     */
    public static function suffix(string $locale): string
    {
        return (string) (config("locales.supported.{$locale}.native") ?? $locale);
    }
}