<?php

declare(strict_types=1);

namespace App\Services;

use App\Models\PreregistrationPage;
use App\Models\Subscriber;
use App\Models\User;
use Illuminate\Support\Carbon;

final class DashboardStatisticsService
{
    /**
     * @return array{total_pages: int, total_subscribers: int, active_pages: int}
     */
    public function forUser(User $user): array
    {
        $pagesQuery = PreregistrationPage::query();
        if (! $user->isSuperadmin()) {
            $pagesQuery->where('user_id', $user->id);
        }

        $now = Carbon::now();
        $totalPages = (clone $pagesQuery)->count();
        $pageIds = (clone $pagesQuery)->pluck('id');
        $totalSubscribers = $pageIds->isEmpty()
            ? 0
            : Subscriber::whereIn('preregistration_page_id', $pageIds)->count();
        $activePages = (clone $pagesQuery)
            ->where('start_date', '<=', $now)
            ->where('end_date', '>=', $now)
            ->count();

        return [
            'total_pages' => $totalPages,
            'total_subscribers' => $totalSubscribers,
            'active_pages' => $activePages,
        ];
    }
}