class Guard::RSpecFormatter

def self.rspec_3?
  ::RSpec::Core::Version::STRING.split(".").first == "3"
end

def _extract_group(metadata)
  metadata[:parent_example_group] || metadata[:example_group]
end

def _failed_paths
  klass = self.class
  failed = examples.select { |example| _status_failed?(example) }
  failed.map { |e| klass.extract_spec_location(e.metadata) }.sort.uniq
end

def _message(example_count, failure_count, pending_count, duration)
  message = "#{example_count} examples, #{failure_count} failures"
  message << " (#{pending_count} pending)" if pending_count > 0
  message << " in #{duration.round(4)} seconds"
  message
end

def _status_failed?(example)
  if self.class.rspec_3?
    example.execution_result.status.to_s == "failed"
  else
    example.execution_result[:status].to_s == "failed"
  end
end

def _write(&block)
  file = RSpecFormatterResultsPath.new.path
  if ENV['GUARD_RSPEC_DEBUGGING'] == '1'
    msg = "Guard::RSpec: using results file: #{file.inspect}"
    STDERR.puts format(msg, file)
  end
  FileUtils.mkdir_p(File.dirname(file))
  File.open(file, "w", &block)
end

def dump_summary(*args)
  return write_summary(*args) unless self.class.rspec_3?
  notification = args[0]
  write_summary(
    notification.duration,
    notification.example_count,
    notification.failure_count,
    notification.pending_count
  )
end

def example_failed(failure)
  examples.push failure.example
end

def examples
  @examples ||= []
end

def extract_spec_location(metadata)
  root_metadata = metadata
  location = metadata[:location]
  until spec_path?(location)
    unless (metadata = _extract_group(metadata))
      STDERR.puts "no spec file location in #{root_metadata.inspect}"
      return root_metadata[:location]
    end
    # rspec issue https://github.com/rspec/rspec-core/issues/1243
    location = first_colon_separated_entry(metadata[:location])
  end
  location
end

def first_colon_separated_entry(entries)
  (entries || "").split(":").first
end

def spec_path?(path)
  pattern = ::RSpec.configuration.pattern
  flags = supported_fnmatch_flags(pattern)
  path ||= ""
  path = path.sub(/:\d+\z/, "")
  path = Pathname.new(path).cleanpath.to_s
  stripped = "{#{pattern.gsub(/\s*,\s*/, ',')}}"
  File.fnmatch(stripped, path, flags)
end

def supported_fnmatch_flags(pattern)
  flags = File::FNM_PATHNAME | File::FNM_DOTMATCH
  # ruby >= 2
  return flags |= File::FNM_EXTGLOB if File.const_defined?(:FNM_EXTGLOB)
  raise Error::UnsupportedPattern if pattern =~ /[{}]/
  flags
end

def write_summary(duration, total, failures, pending)
  _write do |f|
    f.puts _message(total, failures, pending, duration)
    f.puts _failed_paths.join("\n") if failures > 0
  end
end