<?php

namespace Elastica\Node;

use Elastica\Node as BaseNode;
use Elastica\Request;

/**
 * Elastica cluster node object
 *
 * @category Xodoa
 * @package Elastica
 * @author Nicolas Ruflin <spam@ruflin.com>
 * @link http://www.elasticsearch.org/guide/reference/api/admin-indices-status.html
 */
class Info
{
    /**
     * Response
     *
     * @var \Elastica\Response Response object
     */
    protected $_response = null;

    /**
     * Stats data
     *
     * @var array stats data
     */
    protected $_data = array();

    /**
     * Node
     *
     * @var \Elastica\Node Node object
     */
    protected $_node = null;

    /**
     * Query parameters
     *
     * @var array
     */
    protected $_params = array();

    /**
     * Create new info object for node
     *
     * @param \Elastica\Node $node   Node object
     * @param array         $params List of params to return. Can be: settings, os, process, jvm, thread_pool, network, transport, http
     */
    public function __construct(BaseNode $node, array $params = array())
    {
        $this->_node = $node;
        $this->refresh($params);
    }

    /**
     * Returns the entry in the data array based on the params.
     * Several params possible.
     *
     * Example 1: get('os', 'mem', 'total') returns total memory of the system the
     * node is running on
     * Example 2: get('os', 'mem') returns an array with all mem infos
     *
     * @return mixed Data array entry or null if not found
     */
    public function get()
    {
        $data = $this->getData();

        foreach (func_get_args() as $arg) {
            if (isset($data[$arg])) {
                $data = $data[$arg];
            } else {
                return null;
            }
        }

        return $data;
    }

    /**
     * Return port of the node
     *
     * @return string Returns Node port
     */
    public function getPort()
    {
        // Returns string in format: inet[/192.168.1.115:9201]
        $data = $this->get('http_address');
        $data = substr($data, 6, strlen($data) - 7);
        $data = explode(':', $data);

        return $data[1];
    }

    /**
     * Return IP of the node
     *
     * @return string Returns Node ip address
     */
    public function getIp()
    {
        // Returns string in format: inet[/192.168.1.115:9201]
        $data = $this->get('http_address');
        $data = substr($data, 6, strlen($data) - 7);
        $data = explode(':', $data);

        return $data[0];
    }

    /**
     * Return data regarding plugins installed on this node
     * @return array plugin data
     * @link http://www.elasticsearch.org/guide/reference/api/admin-cluster-nodes-info/
     */
    public function getPlugins()
    {
        if(!in_array('plugins', $this->_params)) {
            //Plugin data was not retrieved when refresh() was called last. Get it now.
            $this->_params[] = 'plugins';
            $this->refresh($this->_params);
        }
        return $this->get('plugins');
    }

    /**
     * Check if the given plugin is installed on this node
     * @param string $name plugin name
     * @return bool true if the plugin is installed, false otherwise
     */
    public function hasPlugin($name)
    {
        foreach($this->getPlugins() as $plugin) {
            if($plugin['name'] == $name) {
                return true;
            }
        }
        return false;
    }

    /**
     * Return all info data
     *
     * @return array Data array
     */
    public function getData()
    {
        return $this->_data;
    }

    /**
     * Return node object
     *
     * @return \Elastica\Node Node object
     */
    public function getNode()
    {
        return $this->_node;
    }

    /**
     * Returns response object
     *
     * @return \Elastica\Response Response object
     */
    public function getResponse()
    {
        return $this->_response;
    }

    /**
     * Reloads all nodes information. Has to be called if informations changed
     *
     * @param  array             $params Params to return (default none). Possible options: settings, os, process, jvm, thread_pool, network, transport, http, plugin
     * @return \Elastica\Response Response object
     */
    public function refresh(array $params = array())
    {
        $this->_params = $params;

        $path = '_nodes/' . $this->getNode()->getName();

        if (!empty($params)) {
            $path .= '?';
            foreach ($params as $param) {
                $path .= $param . '=true&';
            }
        }

        $this->_response = $this->getNode()->getClient()->request($path, Request::GET);
        $data = $this->getResponse()->getData();
        $this->_data = reset($data['nodes']);
    }
}