<?php
/**
 * Created by PhpStorm.
 * User: danilo
 * Date: 02/10/15
 * Time: 11:27
 */

namespace Modules\Core\Utils;

abstract class Enum
{
    private static $constCacheArray = null;

    public static function isValidName($name, $strict = false)
    {
        $constants = self::getConstants();

        if ($strict) {
            return array_key_exists($name, $constants);
        }

        $keys = array_map('strtolower', array_keys($constants));

        return in_array(strtolower($name), $keys);
    }

    private static function getConstants()
    {
        if (self::$constCacheArray == null) {
            self::$constCacheArray = [];
        }
        $calledClass = get_called_class();
        if (!array_key_exists($calledClass, self::$constCacheArray)) {
            $reflect = new \ReflectionClass($calledClass);
            self::$constCacheArray[$calledClass] = $reflect->getConstants();
        }

        return self::$constCacheArray[$calledClass];
    }

    public static function isValidValue($value)
    {
        $values = array_values(self::getConstants());

        return in_array($value, $values, true);
    }

    public static function toArray()
    {
        return self::getConstants();
    }

    public static function getName($id)
    {
        $data = self::toArrayFlip();
        return isset($data[$id]) ? $data[$id] : '--';
    }

    public static function toArrayFlip()
    {
        return array_flip(self::getConstants());
    }
}