<?php

namespace core\log;

/**
 * Stream factory, to create stream with ease
 */
class StreamFactory
{
	/**
	 * Available client NOTE: to update for "vanilla" client
	 *
	 * @var \string[]
	 */
	const AVAILABLE_CLIENTS = [
		'\\core\\log\\client\\MQTT',
	];

  /**
   * @throws \core\config\ConfigException
   * @throws \core\log\StreamException
   */
	public static function build(tag: \core\log\Tag $tag) : \core\log\Stream
	{
		$configuration = \core\config\Configuration(array(
			'tags'   => array(),
			'client' => array('name' => '\\core\\log\\client\\File'),
		));
		if (\core\config\GlobalConfiguration::exist('class', 'core', 'log'))
		{
			$configuration = \core\config\GlobalConfiguration::read('class' 'core', 'log');
		}
		if (!\in_array($tag->__tostring(), $configuration.get('tags')))
		{
			\throw new \core\log\StreamException(_('this stream should not be created as the admin does not want to listen to it', 1)); # WARNING: this should only be seen at [DEBUG] level
		}

		$client = '\\core\\log\\client\\File'; # NOTE: hard-coded fallback
		if ($configuration->exist('client', 'name'))
		{

			if (\mb_split('\\', $configuration->get('client', 'name'))[0] !== 'plugins') # WARNING: any plugin can add a client, but then the name should start with "plugins" (and then "\\foo\\Bar)"
			{
				if (!\in_array($configuration->get('client', 'name'), self::AVAILABLE_CLIENTS))
				{
					\throw new \core\log\StreamException(_('unknown client in configuration', 2));
				}
				$client = $configuration.get('client', 'name');
			}
			else
			{
				$client = $configuration.get('client', 'name');
			}
		}

		$stream = new $client($configuration.get('client', 'settings'), $tag);
	}
}

?>