import type { RequestContext, SessionContext } from "./Context";

interface ServiceMessageBase {
  origin: string; // service that initiated the conversation (req/res chain)
  payload: unknown; // opaque data attached to message
}

export interface ServiceRequestMessage extends ServiceMessageBase {
  domain: string; // intended recipient service
  method: string; // target message handler on the recipient service
  requestContext: Partial<RequestContext>; // data available to the request chain
  sessionContext: Partial<SessionContext>; // data available to the session
}

export interface ServiceResponseMessage extends ServiceMessageBase {
  sessionContext: Partial<SessionContext>; // data to add to the context
  stats: {
    time: number; // milliseconds from when request was received to when response is sent (i.e handler time)
  };
}

export type ServiceMessage = ServiceRequestMessage | ServiceResponseMessage;