class Falcon::Controller::Proxy

def endpoint
	@command.endpoint.with(
		ssl_context: self.ssl_context,
		reuse_address: true,
	)
end

def host_context(socket, hostname)
	if host = @hosts[hostname]
		Async.logger.debug(self) {"Resolving #{hostname} -> #{host}"}
		
		socket.hostname = hostname
		
		return host.ssl_context
	else
		Async.logger.warn(self) {"Unable to resolve #{hostname}!"}
		
		return nil
	end
end

def initialize(command, session_id: DEFAULT_SESSION_ID, **options)
	super(command, **options)
	
	@session_id = session_id
	@hosts = {}
end

def load_app
	return Middleware::Proxy.new(Middleware::BadRequest, @hosts)
end

def name
	"Falcon Proxy Server"
end

def ssl_context
	@server_context ||= OpenSSL::SSL::SSLContext.new.tap do |context|
		context.servername_cb = Proc.new do |socket, hostname|
			self.host_context(socket, hostname)
		end
		
		context.session_id_context = @session_id
		
		context.ssl_version = :TLSv1_2_server
		
		context.set_params(
			ciphers: TLS::SERVER_CIPHERS,
			verify_mode: OpenSSL::SSL::VERIFY_NONE,
		)
		
		context.setup
	end
end

def start
	configuration = @command.configuration
	
	services = Services.new(configuration)
	
	@hosts = {}
	
	services.each do |service|
		if service.is_a?(Service::Proxy)
			Async.logger.info(self) {"Proxying #{service.authority} to #{service.endpoint}"}
			@hosts[service.authority] = service
		end
	end
	
	super
end