<?php

namespace App\Notifications\Concerns;

use App\Models\NotificationPreference;
use App\Models\User;
use App\Notifications\Channels\PushChannel;
use App\Notifications\Channels\SmsChannel;

/**
 * Picks notification channels based on the user's NotificationPreference.
 * Hosts must declare a const PREF_KEY pointing to a column on
 * notification_preferences (e.g., 'low_codes_warning'). If the user has
 * disabled that category, no channels are returned.
 */
trait RoutesByPreferences
{
    public function via(mixed $notifiable): array
    {
        if (! $notifiable instanceof User) {
            return [];
        }

        $prefs = NotificationPreference::find($notifiable->id);
        $key = static::PREF_KEY ?? null;
        if ($key && $prefs && ! ($prefs->{$key} ?? true)) {
            return [];
        }

        $channels = ['database'];
        if ($prefs?->sms_enabled ?? true) {
            if ($notifiable->phone) {
                $channels[] = SmsChannel::class;
            }
        }
        if ($prefs?->push_enabled ?? true) {
            if ($notifiable->fcm_token) {
                $channels[] = PushChannel::class;
            }
        }

        return $channels;
    }
}