<?php
namespace App\Models;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
class Device extends Model {
 protected $fillable = ['tenant_id','name','slug','type','mqtt_topic_prefix','mqtt_username','timezone','settings','last_seen_at'];
 protected $casts = ['settings'=>'array','last_seen_at'=>'datetime'];
 public function tenant(): BelongsTo { return $this->belongsTo(Tenant::class); }
 public function readings(): HasMany { return $this->hasMany(Reading::class); }
 public function events(): HasMany { return $this->hasMany(Event::class); }
 public function latestReading(string $metric) {
  return $this->readings()->where('metric',$metric)->latest('recorded_at')->first();
 }
}