<?php
namespace Contabilidad;

use Carbon\Carbon;
use ProVM\Common\Alias\Model;
use Contabilidad\Common\Service\TiposCambios as Service;

/**
 * @property int $id
 * @property string $nombre
 * @property Categoria $categoria_id
 * @property TipoCuenta $tipo_id
 * @property Moneda $moneda_id
 */
class Cuenta extends Model {
  public static $_table = 'cuentas';
  protected static $fields = ['nombre', 'categoria_id', 'tipo_id', 'moneda_id'];

  protected $categoria;
  public function categoria() {
    if ($this->categoria === null) {
      $this->categoria = $this->childOf(Categoria::class, [Model::SELF_KEY => 'categoria_id']);
    }
    return $this->categoria;
  }
  protected $tipo;
  public function tipo() {
    if ($this->tipo === null) {
      $this->tipo = $this->childOf(TipoCuenta::class, [Model::SELF_KEY => 'tipo_id']);
    }
    return $this->tipo;
  }
  protected $moneda;
  public function moneda() {
      if ($this->moneda === null) {
          $this->moneda = $this->childOf(Moneda::class, [Model::SELF_KEY => 'moneda_id']);
      }
      return $this->moneda;
  }

  protected $cargos;
  public function cargos() {
    if ($this->cargos === null) {
      $this->cargos = $this->parentOf(Transaccion::class, [Model::CHILD_KEY => 'credito_id']);
    }
    return $this->cargos;
  }
  protected $abonos;
  public function abonos() {
    if ($this->abonos === null) {
      $this->abonos = $this->parentOf(Transaccion::class, [Model::CHILD_KEY => 'debito_id']);
    }
    return $this->abonos;
  }
  protected $transacciones;
  public function transacciones($limit = null, $start = 0) {
    if ($this->transacciones === null) {
      $transacciones = Model::factory(Transaccion::class)
        ->join('cuentas', 'cuentas.id = transacciones.debito_id OR cuentas.id = transacciones.credito_id')
        ->whereEqual('cuentas.id', $this->id)
        ->orderByAsc('transacciones.fecha');
      if ($limit !== null) {
        $transacciones = $transacciones->limit($limit)
          ->offset($start);
      }
      $this->transacciones = $transacciones->findMany();
      foreach ($this->transacciones as &$transaccion) {
        $transaccion->setFactory($this->factory);
        if ($transaccion->desde_id === $this->id) {
          $transaccion->valor = - $transaccion->valor;
        }
      }
    }
    return $this->transacciones;
  }
  protected $saldo;
  public function saldo(Service $service = null, $in_clp = false) {
    if ($this->saldo === null) {
      $this->saldo = 0;
      if (count($this->transacciones()) > 0) {
        $this->saldo = array_reduce($this->transacciones(), function($sum, $item) {
            return $sum + $item->valor;
        });
      }
    }
    if ($in_clp and $this->moneda()->codigo !== 'CLP') {
        $fecha = Carbon::today();
        if ($this->moneda()->codigo == 'USD') {
            $fecha = match ($fecha->weekday()) {
                0 => $fecha->subWeek()->weekday(5),
                6 => $fecha->weekday(5),
                default => $fecha
            };
        }
        $service->get($fecha->format('Y-m-d'), $this->moneda()->id);
        return $this->moneda()->cambiar($fecha, $this->saldo);
    }
    return $this->saldo;
  }

  public function format($valor) {
      return $this->moneda()->format($valor);
  }

  public function toArray(Service $service = null, $in_clp = false): array {
    $arr = parent::toArray();
    $arr['tipo'] = $this->tipo()->toArray();
    $arr['moneda'] = $this->moneda()->toArray();
    $arr['saldo'] = $this->saldo($service, $in_clp);
    $arr['saldoFormateado'] = $this->format($this->saldo($service, $in_clp));
    return $arr;
  }
}