class Sass::Embedded::Host

def await
  @connection = @channel.connect(self)
  @async = Async.new
  yield
  @async.await
ensure
  @connection.disconnect
end

def canonicalize_request(message)
  send_message EmbeddedProtocol::InboundMessage.new(
    canonicalize_response: @importer_registry.canonicalize(message)
  )
end

def compile_request(path:,
                    source:,
                    importer:,
                    load_paths:,
                    syntax:,
                    url:,
                    source_map:,
                    source_map_include_sources:,
                    style:,
                    functions:,
                    importers:,
                    alert_ascii:,
                    alert_color:,
                    logger:,
                    quiet_deps:,
                    verbose:)
  await do
    alert_color = $stderr.tty? if alert_color.nil?
    @function_registry = FunctionRegistry.new(functions, alert_color: alert_color)
    @importer_registry = ImporterRegistry.new(importers, load_paths, alert_color: alert_color)
    @logger_registry = LoggerRegistry.new(logger)
    send_message EmbeddedProtocol::InboundMessage.new(
      compile_request: EmbeddedProtocol::InboundMessage::CompileRequest.new(
        id: id,
        string: unless source.nil?
                  EmbeddedProtocol::InboundMessage::CompileRequest::StringInput.new(
                    source: source,
                    url: url&.to_s,
                    syntax: Protofier.to_proto_syntax(syntax),
                    importer: (@importer_registry.register(importer) unless importer.nil?)
                  )
                end,
        path: (File.absolute_path(path) unless path.nil?),
        style: Protofier.to_proto_output_style(style),
        source_map: source_map,
        source_map_include_sources: source_map_include_sources,
        importers: @importer_registry.importers,
        global_functions: @function_registry.global_functions,
        alert_ascii: alert_ascii,
        alert_color: alert_color,
        quiet_deps: quiet_deps,
        verbose: verbose
      )
    )
  end
end

def compile_response(message)
  @async.resolve(message)
end

def error(message)
  @async.reject(CompileError.new(message.message, nil, nil, nil))
end

def file_import_request(message)
  send_message EmbeddedProtocol::InboundMessage.new(
    file_import_response: @importer_registry.file_import(message)
  )
end

def function_call_request(message)
  send_message EmbeddedProtocol::InboundMessage.new(
    function_call_response: @function_registry.function_call(message)
  )
end

def id
  @connection.id
end

def import_request(message)
  send_message EmbeddedProtocol::InboundMessage.new(
    import_response: @importer_registry.import(message)
  )
end

def initialize(channel)
  @channel = channel
end

def log_event(message)
  @logger_registry.log(message)
end

def send_message(message)
  @connection.send_message(message)
end

def version_request
  await do
    send_message EmbeddedProtocol::InboundMessage.new(
      version_request: EmbeddedProtocol::InboundMessage::VersionRequest.new(
        id: id
      )
    )
  end
end

def version_response(message)
  @async.resolve(message)
end