<?php
namespace Contabilidad;

use ProVM\Common\Alias\Model;

/**
 * @property int $id
 * @property string $nombre
 */
class Categoria extends Model {
  public static $_table = 'categorias';
  protected static $fields = ['nombre'];

  protected $cuentas;
  public function cuentas() {
    if ($this->cuentas === null) {
      $this->cuentas = $this->parentOf(Cuenta::class, [Model::CHILD_KEY => 'categoria_id']);
    }
    return $this->cuentas;
  }

  protected $saldo;
  public function saldo() {
    if ($this->saldo === null) {
      $this->saldo = 0;
      if ($this->cuentas() !== null) {
        $this->saldo = array_reduce($this->cuentas(), function($sum, $item) {
          return $sum + $item->saldo();
        });
      }
    }
    return $this->saldo;
  }

  public function toArray(): array {
    $arr = parent::toArray();
    $arr['saldo'] = $this->saldo();
    $arr['saldoFormateado'] = '$' . number_format($this->saldo(), 0, ',', '.');
    return $arr;
  }
}