<?php

/**
 * @file
 * TeamSpeak 3 PHP Framework
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * @package   TeamSpeak3
 * @author    Sven 'ScP' Paulsen
 * @copyright Copyright (c) Planet TeamSpeak. All rights reserved.
 */

/**
 * @class TeamSpeak3_Node_Abstract
 * @brief Abstract class describing a TeamSpeak 3 node and all it's parameters.
 */
abstract class TeamSpeak3_Node_Abstract implements RecursiveIterator, ArrayAccess, Countable
{
  /**
   * @ignore
   */
  protected $parent = null;

  /**
   * @ignore
   */
  protected $server = null;

  /**
   * @ignore
   */
  protected $nodeId = 0x00;

  /**
   * @ignore
   */
  protected $nodeList = null;

  /**
   * @ignore
   */
  protected $nodeInfo = array();

  /**
   * @ignore
   */
  protected $storage = array();

  /**
   * Sends a prepared command to the server and returns the result.
   *
   * @param  string  $cmd
   * @param  boolean $throw
   * @return TeamSpeak3_Adapter_ServerQuery_Reply
   */
  public function request($cmd, $throw = TRUE)
  {
    return $this->getParent()->request($cmd, $throw);
  }

  /**
   * Uses given parameters and returns a prepared ServerQuery command.
   *
   * @param  string $cmd
   * @param  array  $params
   * @return TeamSpeak3_Helper_String
   */
  public function prepare($cmd, array $params = array())
  {
    return $this->getParent()->prepare($cmd, $params);
  }

  /**
   * Prepares and executes a ServerQuery command and returns the result.
   *
   * @param  string $cmd
   * @param  array  $params
   * @return TeamSpeak3_Adapter_ServerQuery_Reply
   */
  public function execute($cmd, array $params = array())
  {
    return $this->request($this->prepare($cmd, $params));
  }

  /**
   * Returns the parent object of the current node.
   *
   * @return TeamSpeak3_Adapter_ServerQuery
   * @return TeamSpeak3_Node_Abstract
   */
  public function getParent()
  {
    return $this->parent;
  }

  /**
   * Returns the primary ID of the current node.
   *
   * @return integer
   */
  public function getId()
  {
    return $this->nodeId;
  }

  /**
   * Returns TRUE if the node icon has a local source.
   *
   * @param  string $key
   * @return boolean
   */
  public function iconIsLocal($key)
  {
    return ($this[$key] > 0 && $this[$key] < 1000) ? TRUE : FALSE;
  }

  /**
   * Returns the internal path of the node icon.
   *
   * @param  string $key
   * @return TeamSpeak3_Helper_String
   */
  public function iconGetName($key)
  {
    $iconid = ($this[$key] < 0) ? (pow(2, 32))-($this[$key]*-1) : $this[$key];

    return new TeamSpeak3_Helper_String("/icon_" . $iconid);
  }

  /**
   * Returns a possible classname for the node which can be used as a HTML property.
   *
   * @param  string $prefix
   * @return string
   */
  public function getClass($prefix = "ts3_")
  {
    if($this instanceof TeamSpeak3_Node_Channel && $this->isSpacer())
    {
      return $prefix . "spacer";
    }
    elseif($this instanceof TeamSpeak3_Node_Client && $this["client_type"])
    {
      return $prefix . "query";
    }

    return $prefix . TeamSpeak3_Helper_String::factory(get_class($this))->section("_", 2)->toLower();
  }

  /**
   * Returns a unique identifier for the node which can be used as a HTML property.
   *
   * @return string
   */
  abstract public function getUniqueId();

  /**
   * Returns the name of a possible icon to display the node object.
   *
   * @return string
   */
  abstract public function getIcon();

  /**
   * Returns a symbol representing the node.
   *
   * @return string
   */
  abstract public function getSymbol();

  /**
   * Returns the HTML code to display a TeamSpeak 3 viewer.
   *
   * @param  TeamSpeak3_Viewer_Interface $viewer
   * @return string
   */
  public function getViewer(TeamSpeak3_Viewer_Interface $viewer)
  {
    $html = $viewer->fetchObject($this);

    $iterator = new RecursiveIteratorIterator($this, RecursiveIteratorIterator::SELF_FIRST);

    foreach($iterator as $node)
    {
      $siblings = array();

      for($level = 0; $level < $iterator->getDepth(); $level++)
      {
        $siblings[] = ($iterator->getSubIterator($level)->hasNext()) ? 1 : 0;
      }

      $siblings[] = (!$iterator->getSubIterator($level)->hasNext()) ? 1 : 0;

      $html .= $viewer->fetchObject($node, $siblings);
    }

    if(empty($html) && method_exists($viewer, "toString"))
    {
      return $viewer->toString();
    }

    return $html;
  }

  /**
   * Filters given node list array using specified filter rules.
   *
   * @param  array $nodes
   * @param  array $rules
   * @return array
   */
  protected function filterList(array $nodes = array(), array $rules = array())
  {
    if(!empty($rules))
    {
      foreach($nodes as $node)
      {
        if(!$node instanceof TeamSpeak3_Node_Abstract) continue;

        $props = $node->getInfo(FALSE);
        $props = array_intersect_key($props, $rules);

        foreach($props as $key => $val)
        {
          if($val instanceof TeamSpeak3_Helper_String)
          {
            $match = $val->contains($rules[$key], TRUE);
          }
          else
          {
            $match = $val == $rules[$key];
          }

          if($match === FALSE)
          {
            unset($nodes[$node->getId()]);
          }
        }
      }
    }

    return $nodes;
  }

  /**
   * Returns all information available on this node. If $convert is enabled, some property
   * values will be converted to human-readable values.
   *
   * @param  boolean $extend
   * @param  boolean $convert
   * @return array
   */
  public function getInfo($extend = TRUE, $convert = FALSE)
  {
    if($extend)
    {
      $this->fetchNodeInfo();
    }

    if($convert)
    {
      $info = $this->nodeInfo;

      foreach($info as $key => $val)
      {
        $key = TeamSpeak3_Helper_String::factory($key);

        if($key->contains("_bytes_"))
        {
          $info[$key->toString()] = TeamSpeak3_Helper_Convert::bytes($val);
        }
        elseif($key->contains("_bandwidth_"))
        {
          $info[$key->toString()] = TeamSpeak3_Helper_Convert::bytes($val) . "/s";
        }
        elseif($key->contains("_packets_"))
        {
          $info[$key->toString()] = number_format($val, null, null, ".");
        }
        elseif($key->contains("_packetloss_"))
        {
          $info[$key->toString()] = sprintf("%01.2f", floatval($val instanceof TeamSpeak3_Helper_String ? $val->toString() : strval($val))*100) . "%";
        }
        elseif($key->endsWith("_uptime"))
        {
          $info[$key->toString()] = TeamSpeak3_Helper_Convert::seconds($val);
        }
        elseif($key->endsWith("_version"))
        {
          $info[$key->toString()] = TeamSpeak3_Helper_Convert::version($val);
        }
        elseif($key->endsWith("_icon_id"))
        {
          $info[$key->toString()] = $this->iconGetName($key)->filterDigits();
        }
      }

      return $info;
    }

    return $this->nodeInfo;
  }

  /**
   * Returns the specified property or a pre-defined default value from the node info array.
   *
   * @param  string $property
   * @param  mixed  $default
   * @return mixed
   */
  public function getProperty($property, $default = null)
  {
    if(!$this->offsetExists($property))
    {
      $this->fetchNodeInfo();
    }

    if(!$this->offsetExists($property))
    {
      return $default;
    }

    return $this->nodeInfo[(string) $property];
  }

  /**
   * Returns a string representation of this node.
   *
   * @return string
   */
  public function __toString()
  {
    return get_class($this);
  }

  /**
   * Returns a string representation of this node.
   *
   * @return string
   */
  public function toString()
  {
    return $this->__toString();
  }

  /**
   * Returns an assoc array filled with current node info properties.
   *
   * @return array
   */
  public function toArray()
  {
    return $this->nodeList;
  }

  /**
   * Called whenever we're using an unknown method.
   *
   * @param  string $name
   * @param  array  $args
   * @throws TeamSpeak3_Node_Exception
   * @return mixed
   */
  public function __call($name, array $args)
  {
    if($this->getParent() instanceof TeamSpeak3_Node_Abstract)
    {
      return call_user_func_array(array($this->getParent(), $name), $args);
    }

    throw new TeamSpeak3_Node_Exception("node method '" . $name . "()' does not exist");
  }

  /**
   * Writes data to the internal storage array.
   *
   * @param  string $key
   * @param  mixed  $val
   * @return void
   */
  protected function setStorage($key, $val)
  {
    $this->storage[$key] = $val;
  }

  /**
   * Returns data from the internal storage array.
   *
   * @param  string $key
   * @param  mixed  $default
   * @return mixed
   */
  protected function getStorage($key, $default = null)
  {
    return !empty($this->storage[$key]) ? $this->storage[$key] : $default;
  }

  /**
   * Deletes data from the internal storage array.
   *
   * @param  string $key
   * @return void
   */
  protected function delStorage($key)
  {
    unset($this->storage[$key]);
  }

  /**
   * Commit pending data.
   *
   * @return array
   */
  public function __sleep()
  {
    return array("parent", "storage", "nodeId");
  }

  /**
   * @ignore
   */
  protected function fetchNodeList()
  {
    $this->nodeList = array();
  }

  /**
   * @ignore
   */
  protected function fetchNodeInfo()
  {
    return;
  }

  /**
   * @ignore
   */
  protected function resetNodeInfo()
  {
    $this->nodeInfo = array();
  }

  /**
   * @ignore
   */
  protected function verifyNodeList()
  {
    if($this->nodeList === null)
    {
      $this->fetchNodeList();
    }
  }

  /**
   * @ignore
   */
  protected function resetNodeList()
  {
    $this->nodeList = null;
  }

  /**
   * @ignore
   */
  public function count()
  {
    $this->verifyNodeList();

    return count($this->nodeList);
  }

  /**
   * @ignore
   */
  public function current()
  {
    $this->verifyNodeList();

    return current($this->nodeList);
  }

  /**
   * @ignore
   */
  public function getChildren()
  {
    $this->verifyNodeList();

    return $this->current();
  }

  /**
   * @ignore
   */
  public function hasChildren()
  {
    $this->verifyNodeList();

    return $this->current()->count() > 0;
  }

  /**
   * @ignore
   */
  public function hasNext()
  {
    $this->verifyNodeList();

    return $this->key()+1 < $this->count();
  }

  /**
   * @ignore
   */
  public function key()
  {
    $this->verifyNodeList();

    return key($this->nodeList);
  }

  /**
   * @ignore
   */
  public function valid()
  {
    $this->verifyNodeList();

    return $this->key() !== null;
  }

  /**
   * @ignore
   */
  public function next()
  {
    $this->verifyNodeList();

    return next($this->nodeList);
  }

  /**
   * @ignore
   */
  public function rewind()
  {
    $this->verifyNodeList();

    return reset($this->nodeList);
  }

  /**
   * @ignore
   */
  public function offsetExists($offset)
  {
    return array_key_exists((string) $offset, $this->nodeInfo) ? TRUE : FALSE;
  }

  /**
   * @ignore
   */
  public function offsetGet($offset)
  {
    if(!$this->offsetExists($offset))
    {
      $this->fetchNodeInfo();
    }

    if(!$this->offsetExists($offset))
    {
      throw new TeamSpeak3_Node_Exception("node '" . get_class($this) . "' has no property named '" . $offset . "'");
    }

    return $this->nodeInfo[(string) $offset];
  }

  /**
   * @ignore
   */
  public function offsetSet($offset, $value)
  {
    if(method_exists($this, "modify"))
    {
      return $this->modify(array((string) $offset => $value));
    }

    throw new TeamSpeak3_Node_Exception("node '" . get_class($this) . "' is read only");
  }

  /**
   * @ignore
   */
  public function offsetUnset($offset)
  {
    unset($this->nodeInfo[(string) $offset]);
  }

  /**
   * @ignore
   */
  public function __get($offset)
  {
    return $this->offsetGet($offset);
  }

  /**
   * @ignore
   */
  public function __set($offset, $value)
  {
    $this->offsetSet($offset, $value);
  }
}
