module ZookeeperConstants
  # file type masks
  ZOO_EPHEMERAL = 1
  ZOO_SEQUENCE  = 2
  
  # session state
  ZOO_EXPIRED_SESSION_STATE  = -112
  ZOO_AUTH_FAILED_STATE      = -113
  ZOO_CLOSED_STATE           = 0
  ZOO_CONNECTING_STATE       = 1
  ZOO_ASSOCIATING_STATE      = 2
  ZOO_CONNECTED_STATE        = 3
  
  # watch types
  ZOO_CREATED_EVENT      = 1
  ZOO_DELETED_EVENT      = 2
  ZOO_CHANGED_EVENT      = 3
  ZOO_CHILD_EVENT        = 4
  ZOO_SESSION_EVENT      = -1
  ZOO_NOTWATCHING_EVENT  = -2

  # only used by the C extension
  ZOO_LOG_LEVEL_ERROR = 1
  ZOO_LOG_LEVEL_WARN  = 2
  ZOO_LOG_LEVEL_INFO  = 3
  ZOO_LOG_LEVEL_DEBUG = 4

  # used to find the name for a numeric event
  # @private
  EVENT_TYPE_NAMES = {
    1   => 'created',
    2   => 'deleted',
    3   => 'changed',
    4   => 'child',
    -1  => 'session',
    -2  => 'notwatching',
  }

  # used to pretty print the state name
  # @private
  STATE_NAMES = {
    -112 => 'expired_session',
    -113 => 'auth_failed',
    0    => 'closed',
    1    => 'connecting',
    2    => 'associating',
    3    => 'connected',
  }
              
  def event_by_value(v)
    (name = EVENT_TYPE_NAMES[v]) ?  "ZOO_#{name.upcase}_EVENT" : ''
  end

  def state_by_value(v)
    (name = STATE_NAMES[v]) ?  "ZOO_#{name.upcase}_STATE" : ''
  end
end