<?php

namespace App\Services;

use App\Models\Notification;
use App\Models\User;
use Illuminate\Contracts\Pagination\LengthAwarePaginator;
use Illuminate\Support\Collection;

class NotificationService
{
    /**
     * @param  Collection<int, int>|array<int, int>  $userIds
     */
    public function sendToUsers(Collection|array $userIds, string $title, ?string $content = null, ?int $createdBy = null): void
    {
        $userIds = collect($userIds)->filter()->unique()->values();

        if ($userIds->isEmpty()) {
            return;
        }

        $createdBy ??= auth()->id();
        $now = now();

        Notification::insert($userIds->map(fn (int $userId) => [
            'user_id' => $userId,
            'created_by' => $createdBy,
            'title' => $title,
            'content' => $content,
            'is_read' => false,
            'created_at' => $now,
            'updated_at' => $now,
        ])->all());
    }

    public function paginated(User $user, int $perPage = 15): LengthAwarePaginator
    {
        return Notification::query()
            ->where('user_id', $user->id)
            ->with('creator.profile')
            ->orderByDesc('created_at')
            ->orderByDesc('id')
            ->paginate($perPage);
    }

    public function unreadCount(User $user): int
    {
        return Notification::query()
            ->where('user_id', $user->id)
            ->where('is_read', false)
            ->count();
    }

    public function markAsRead(Notification $notification): void
    {
        $notification->update(['is_read' => true]);
    }

    public function markAllAsRead(User $user): void
    {
        Notification::query()
            ->where('user_id', $user->id)
            ->where('is_read', false)
            ->update(['is_read' => true]);
    }

    public function delete(Notification $notification): bool
    {
        return $notification->delete();
    }

    public function deleteAll(User $user): void
    {
        Notification::query()->where('user_id', $user->id)->delete();
    }
}