<?php
namespace ProVM\Money;

use ProVM\Common\Alias\Model;
use ProVM\Common\Define\Model\DateTime;
use ProVM\Common\Factory\Model as ModelFactory;

/**
 * @property Currency $currency_id
 * @property \DateTime $date_time
 * @property double $value
 * @property Currency $base_id
 */
class Value extends Model {
  use DateTime;

  public static $_table = 'values';
  public static $_id_column = ['currency_id', 'base_id', 'date_time'];

  protected $currency;
  public function currency(): ?Currency {
    if ($this->currency === null) {
      $this->currency = $this->childOf(Currency::class, [Model::SELF_KEY => 'currency_id']);
    }
    return $this->currency;
  }
  protected $base;
  public function base(): ?Currency {
    if ($this->base === null) {
      $this->base = $this->childOf(Currency::class, [Model::SELF_KEY => 'base_id']);
    }
    return $this->base;
  }

  protected static $fields = ['currency_id', 'date_time', 'value', 'base_id'];
  public static function add(ModelFactory $factory, $info) {
    $input = array_intersect_key((array) $info, array_combine(self::$fields, self::$fields));
    $value = $factory->find(Value::class)->where([['currency_id', $input['currency_id']], ['date_time', $input['date_time']], ['base_id', $input['base_id']]])->one();
    $created = false;
    $result = (object) compact('input', 'value', 'created');
    if (!$value) {
      $value = $factory->create(Value::class, $input);
      $created = $value->save();
      $result->created = $created;
    }
    $result->value = $value->asArray();
    return $result;
  }
  public function edit($info) {
    $data = array_intersect_key((array) $info, array_combine(self::$fields, self::$fields));
    $edited = false;
    foreach ($data as $field => $value) {
      if ($this->{$field} != $value) {
        if ($field == 'currency_id' or $field == 'base_id') {
          continue;
        }
        $this->{$field} = $value;
        $edited = true;
      }
    }
    if ($edited) {
      $edited = $this->save();
    }
    return $edited;
  }
  public function asArray(): array {
    $output = parent::asArray();
    $output['currency'] = $this->currency()->asArray();
    $output['base'] = $this->base()->asArray();
    $output['date_time'] = $this->dateTime()->format('Y-m-d H:i:s');
    return $output;
  }
}