class Falcon::Adapters::Response

def self.wrap(status, headers, body, request = nil)
	headers, meta = wrap_headers(headers)
	
	if block = meta['rack.hijack']
		body = Async::HTTP::Body::Hijack.wrap(request, &block)
	else
		ignored = headers.extract(IGNORE_HEADERS)
		
		unless ignored.empty?
			Async.logger.warn("Ignoring protocol-level headers: #{ignored.inspect}")
		end
		
		body = Output.wrap(status, headers, body)
	end
	
	protocol = meta['rack.protocol']
	
	# https://tools.ietf.org/html/rfc7231#section-7.4.2
	# headers.add('server', "falcon/#{Falcon::VERSION}")
	
	# https://tools.ietf.org/html/rfc7231#section-7.1.1.2
	# headers.add('date', Time.now.httpdate)
	
	return self.new(status, headers, body, protocol)
end

def self.wrap_headers(fields)
	headers = ::Protocol::HTTP::Headers.new
	meta = {}
	
	fields.each do |key, value|
		key = key.downcase
		
		if key.start_with?('rack.')
			meta[key] = value
		else
			value.to_s.split("\n").each do |part|
				headers.add(key, part)
			end
		end
	end
	
	return headers, meta
end

def initialize(status, headers, body, protocol = nil)
	super(nil, status, headers, body, protocol)
end