<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */
// +---------------------------------------------------------------------------
// | SWAN [ $_SWANBR_SLOGAN_$ ]
// +---------------------------------------------------------------------------
// | Copyright $_SWANBR_COPYRIGHT_$
// +---------------------------------------------------------------------------
// | Version  $_SWANBR_VERSION_$
// +---------------------------------------------------------------------------
// | Licensed ( $_SWANBR_LICENSED_URL_$ )
// +---------------------------------------------------------------------------
// | $_SWANBR_WEB_DOMAIN_$
// +---------------------------------------------------------------------------

namespace Kafka;

/**
 * +------------------------------------------------------------------------------
 * Kafka Broker info manager
 * +------------------------------------------------------------------------------
 *
 * @package
 * @version $_SWANBR_VERSION_$
 * @copyright Copyleft
 * @author $_SWANBR_AUTHOR_$
 * +------------------------------------------------------------------------------
 */
class Broker
{
	use SingletonTrait;

	// {{{ consts
	// }}}
	// {{{ members

	private $groupBrokerId = null;

	private $topics = array();

	private $brokers = array();

	private $metaSockets = array();

	private $dataSockets = array();

	private $process;

	private $socket;

	// }}}
	// {{{ functions
	// {{{ public function setProcess()

	public function setProcess(\Closure $process)
	{
		$this->process = $process;
	}

	// }}}
	// {{{ public function setGroupBrokerId()

	public function setGroupBrokerId($brokerId)
	{
		$this->groupBrokerId = $brokerId;
	}

	// }}}
	// {{{ public function getGroupBrokerId()

	public function getGroupBrokerId()
	{
		return $this->groupBrokerId;
	}

	// }}}
	// {{{ public function setData()

	public function setData($topics, $brokersResult)
	{
		$brokers = array();
		foreach ($brokersResult as $value) {
			$key = $value['nodeId'];
			$hostname = $value['host'] . ':' . $value['port'];
			$brokers[$key] = $hostname;
		}

		$change = false;
		if (serialize($this->brokers) != serialize($brokers)) {
			$this->brokers = $brokers;
			$change = true;
		}

		$newTopics = array();
		foreach ($topics as $topic) {
			if ($topic['errorCode'] != \Kafka\Protocol::NO_ERROR) {
				$this->error('Parse metadata for topic is error, error:' . \Kafka\Protocol::getError($topic['errorCode']));
				continue;
			}
			$item = array();
			foreach ($topic['partitions'] as $part) {
				$item[$part['partitionId']] = $part['leader'];
			}
			$newTopics[$topic['topicName']] = $item;
		}

		if (serialize($this->topics) != serialize($newTopics)) {
			$this->topics = $newTopics;
			$change = true;
		}

		return $change;
	}

	// }}}
	// {{{ public function getTopics()

	public function getTopics()
	{
		return $this->topics;
	}

	// }}}
	// {{{ public function getBrokers()

	public function getBrokers()
	{
		return $this->brokers;
	}

	// }}}
	// {{{ public function getMetaConnect()

	public function getMetaConnect($key, $modeSync = false)
	{
		return $this->getConnect($key, 'metaSockets', $modeSync);
	}

	// }}}
	// {{{ public function getRandConnect()

	public function getRandConnect($modeSync = false)
	{
		$nodeIds = array_keys($this->brokers);
		shuffle($nodeIds);
		if (!isset($nodeIds[0])) {
			return false;
		}
		return $this->getMetaConnect($nodeIds[0], $modeSync);
	}

	// }}}
	// {{{ public function getDataConnect()

	public function getDataConnect($key, $modeSync = false)
	{
		return $this->getConnect($key, 'dataSockets', $modeSync);
	}

	// }}}
	// {{{ public function getConnect()

	public function getConnect($key, $type, $modeSync = false)
	{
		if (isset($this->{$type}[$key])) {
			return $this->{$type}[$key];
		}

		if (isset($this->brokers[$key])) {
			$hostname = $this->brokers[$key];
			if (isset($this->{$type}[$hostname])) {
				return $this->{$type}[$hostname];
			}
		}

		$host = null;
		$port = null;
		if (isset($this->brokers[$key])) {
			$hostname = $this->brokers[$key];
			list($host, $port) = explode(':', $hostname);
		}

		if (strpos($key, ':') !== false) {
			list($host, $port) = explode(':', $key);
		}

		if ($host && $port) {
			try {
				$socket = $this->getSocket($host, $port, $modeSync);
                if (!$modeSync) {
                    $socket->SetonReadable($this->process);
                }
				$socket->connect();
				$this->{$type}[$key] = $socket;
				return $socket;
			} catch (\Exception $e) {
				$this->error($e->getMessage());
				$this->error($e->getFile() . ':' . $e->getLine());
				return false;
			}
		} else {
			return false;
		}
	}

	// }}}
	// {{{ public function clear()

	public function clear()
	{
		foreach ($this->metaSockets as $key => $socket) {
			$socket->close();
		}
		foreach ($this->dataSockets as $key => $socket) {
			$socket->close();
		}
		$this->brokers = [];
	}

	// }}}
	// {{{ public function getSocket()

	public function getSocket($host, $port, $modeSync)
	{
		if ($this->socket != null) {
			return $this->socket;
		}

		if ($modeSync) {
			$socket = new \Kafka\SocketSync($host, $port);
		} else {
			$socket = new \Kafka\Socket($host, $port);
		}
		return $socket;
	}

	// }}}
	// {{{ public function setSocket()

	// use unit test
	public function setSocket($socket)
	{
		$this->socket = $socket;
	}

	// }}}
	// }}}
}