<?php

namespace Modules\Sites\Services;

use Illuminate\Http\Request;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Schema;
use Modules\Sites\Models\Site;

final class SiteManager
{
    private ?Site $current = null;

    public function current(): ?Site
    {
        return $this->current;
    }

    public function setCurrent(?Site $site): void
    {
        $this->current = $site;

        if ($site) {
            app()->instance(Site::class, $site);
            app()->instance('currentSite', $site);
        }
    }

    public function all(): Collection
    {
        if (! $this->tablesExist()) {
            return collect();
        }

        return Site::query()
            ->active()
            ->orderByDesc('is_default')
            ->orderBy('name')
            ->get();
    }

    public function resolve(Request $request): ?Site
    {
        if (! $this->tablesExist()) {
            $this->setCurrent(null);

            return null;
        }

        $host = strtolower(preg_replace('/:\d+$/', '', $request->getHost()));

        $site = Site::query()
            ->with(['domains', 'settings'])
            ->whereHas('domains', fn ($query) => $query
                ->where('domain', $host)
                ->where('is_active', true))
            ->first();

        if (! $site && config('sites.fallback_to_default')) {
            $site = Site::query()
                ->with(['domains', 'settings'])
                ->active()
                ->where('is_default', true)
                ->first();
        }

        $this->setCurrent($site);

        return $site;
    }

    private function tablesExist(): bool
    {
        return Schema::hasTable('sites') && Schema::hasTable('site_domains');
    }
}