<?php

namespace Modules\Stylist\Support;

use Illuminate\Support\Facades\Route;
use Illuminate\Support\Facades\Schema;
use Modules\Menus\Models\Menu;
use Throwable;

final class FrontendNavigation
{
    /** @return array<int, array<string, mixed>> */
    public function primary(): array
    {
        return $this->location('primary', $this->fallbackPrimary());
    }

    /** @return array<int, array<string, mixed>> */
    public function footer(): array
    {
        return $this->location('footer', $this->fallbackPrimary());
    }

    /** @param array<int, array<string, mixed>> $fallback
     *  @return array<int, array<string, mixed>>
     */
    public function location(string $location, array $fallback = []): array
    {
        try {
            if (! Schema::hasTable('menus')) {
                return $fallback;
            }

            $menu = Menu::query()->where('enabled', true)->where('location', $location)->first();
            if (! $menu || ! is_array($menu->items)) {
                return $fallback;
            }

            $items = $this->normaliseItems($menu->items);

            return $items === [] ? $fallback : $items;
        } catch (Throwable) {
            return $fallback;
        }
    }

    /** @param array<int, mixed> $items
     *  @return array<int, array<string, mixed>>
     */
    private function normaliseItems(array $items): array
    {
        return collect($items)
            ->filter(fn (mixed $item): bool => is_array($item) && filter_var($item['enabled'] ?? true, FILTER_VALIDATE_BOOL))
            ->map(function (array $item): ?array {
                $label = trim((string) ($item['label'] ?? ''));
                $url = trim((string) ($item['url'] ?? ''));
                if ($label === '' || $url === '') return null;

                return [
                    'label' => $label,
                    'url' => $url,
                    'target' => ($item['target'] ?? '') === '_blank' ? '_blank' : null,
                    'children' => $this->normaliseItems((array) ($item['children'] ?? [])),
                ];
            })->filter()->values()->all();
    }

    /** @return array<int, array<string, mixed>> */
    private function fallbackPrimary(): array
    {
        $items = [['label' => 'Home', 'url' => url('/'), 'target' => null, 'children' => []]];
        if (Route::has('blog.public.index')) $items[] = ['label' => 'Blog', 'url' => route('blog.public.index'), 'target' => null, 'children' => []];
        if (Route::has('news.public.index')) $items[] = ['label' => 'News', 'url' => route('news.public.index'), 'target' => null, 'children' => []];
        return $items;
    }
}