class ElasticAPM::Span

def build_stacktrace!
  @stacktrace = @stacktrace_builder.build(original_backtrace, type: :span)
  self.original_backtrace = nil # release original
end

def done(end_time: Util.micros)
  stop end_time
  build_stacktrace! if should_build_stacktrace?
  self
end

def initialize(
  name:,
  transaction_id:,
  trace_context:,
  type: nil,
  context: nil,
  stacktrace_builder: nil
)
  @name = name
  @type = type || DEFAULT_TYPE
  @transaction_id = transaction_id
  @trace_context = trace_context
  @context = context || Span::Context.new
  @stacktrace_builder = stacktrace_builder
end

def inspect
  "<ElasticAPM::Span id:#{id}" \
    " name:#{name.inspect}" \
    " type:#{type.inspect}" \
    '>'
end

def long_enough_for_stacktrace?
  min_duration =
    @stacktrace_builder.config.span_frames_min_duration_us
  return true if min_duration < 0
  return false if min_duration == 0
  duration >= min_duration
end

def running?
  started? && !stopped?
end

def should_build_stacktrace?
  @stacktrace_builder && original_backtrace && long_enough_for_stacktrace?
end

def start(timestamp = Util.micros)
  @timestamp = timestamp
  self
end

def started?
  !!timestamp
end

def stop(end_timestamp = Util.micros)
  @duration ||= (end_timestamp - timestamp)
end

def stopped?
  !!duration
end