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<?php

namespace SAREhub\Commons\Misc;

/**
 * Class for operate on custom configurations
 */
class Parameters implements \JsonSerializable
{

    /**
     * @var array
     */
    private $parameters;

    public function __construct(array $parameters)
    {
        $this->parameters = $parameters;
    }

    public static function createFlatten($parameters)
    {
        return new Parameters(ArrayHelper::flatten($parameters));
    }

    /**
     * @param string $json
     * @return self
     */
    public static function createFromJson($json)
    {
        return new self(json_decode($json, true));
    }

    /**
     * @param string $name
     * @param mixed $default
     * @return mixed
     */
    public function get($name, $default = null)
    {
        return ($this->has($name)) ? $this->parameters[$name] : $default;
    }

    public function getRequired($name)
    {
        if ($this->has($name)) {
            return $this->parameters[$name];
        }

        throw new NotFoundParameterException("Required parameter doesn't exists: $name");
    }

    /**
     * @param string $name
     * @param array $default
     * @return self
     * @throws \Exception
     */
    public function getAsMap($name, array $default = [])
    {
        $parameters = $this->get($name, $default);
        if (is_array($parameters)) {
            return new self($parameters);
        }

        throw new ParameterException("Parameter isn't array: $name");
    }

    /**
     * @param $name
     * @return self
     * @throws \Exception
     */
    public function getRequiredAsMap($name)
    {
        $parameters = $this->getRequired($name);
        if (is_array($parameters)) {
            return new self($parameters);
        }

        throw new ParameterException("Parameter isn't array: $name");
    }

    /**
     * @param $name
     * @return bool
     */
    public function has($name)
    {
        return isset($this->parameters[$name]);
    }

    /**
     * @return array
     */
    public function getAll()
    {
        return $this->parameters;
    }

    /**
     * @return array
     */
    function jsonSerialize()
    {
        return $this->getAll();
    }
}