export const MESSAGE_TYPE = {
  // Commit events are acked with the GENERIC pair below — the reply is
  // correlated by SOURCE_REF, not by name. Real Genesis never replies
  // <EVENT_NAME>_ACK/_NACK: foundation-comms' kv.service checks
  // MESSAGE_TYPE === 'EVENT_ACK' exactly, and entity-management (and the
  // showcase's customEvents.ts) check MESSAGE_TYPE === 'EVENT_NACK' exactly.
  // Reply with the name-suffixed form and every successful commit renders as
  // a failure toast while every NACK passes silently.
  EVENT_ACK: 'EVENT_ACK',
  EVENT_NACK: 'EVENT_NACK',
  EVENT_LOGIN_AUTH: 'EVENT_LOGIN_AUTH',
  EVENT_LOGIN_AUTH_ACK: 'EVENT_LOGIN_AUTH_ACK',
  EVENT_LOGIN_AUTH_NACK: 'EVENT_LOGIN_AUTH_NACK',
  EVENT_LOGOUT: 'EVENT_LOGOUT',
  LOGOUT_ACK: 'LOGOUT_ACK',
  EVENT_LOGOUT_NACK: 'EVENT_LOGOUT_NACK',
  HEARTBEAT_PING: 'HEARTBEAT_PING',
  HEARTBEAT_PONG: 'HEARTBEAT_PONG',
  DATA_LOGON: 'DATA_LOGON',
  LOGON_ACK: 'LOGON_ACK',
  LOGON_NACK: 'LOGON_NACK',
  DATA_LOGOFF: 'DATA_LOGOFF',
  LOGOFF_ACK: 'LOGOFF_ACK',
  QUERY_UPDATE: 'QUERY_UPDATE',
  MORE_ROWS: 'MORE_ROWS',
  MORE_ROWS_ACK: 'MORE_ROWS_ACK',
  META_REQUEST: 'META_REQUEST',
  FEATURE_ACK: 'FEATURE_ACK',
  JSON_SCHEMA_REQUEST: 'JSON_SCHEMA_REQUEST',
  JSON_SCHEMA_FEATURE_ACK: 'JSON_SCHEMA_FEATURE_ACK',
  // The router's generic rejection (unknown resource, missing or duplicate
  // dataserver subscription) — see protocol/msgNack.ts.
  MSG_NACK: 'MSG_NACK',
  RESOURCES_REQUEST: 'RESOURCES_REQUEST',
  RESOURCES_REQUEST_ACK: 'RESOURCES_REQUEST_ACK',
  RESOURCES_REQUEST_NACK: 'RESOURCES_REQUEST_NACK',
} as const;

export const ERROR_CODE = {
  INCORRECT_CREDENTIALS: 'INCORRECT_CREDENTIALS',
  VALIDATION_ERROR: 'VALIDATION_ERROR',
  UNKNOWN_RESOURCE: 'UNKNOWN_RESOURCE',
  NOT_LOGGED_ON: 'NOT_LOGGED_ON',
} as const;

export function isCommitEvent(messageType: unknown): messageType is string {
  return (
    typeof messageType === 'string' &&
    messageType.startsWith('EVENT_') &&
    messageType !== MESSAGE_TYPE.EVENT_LOGIN_AUTH &&
    messageType !== MESSAGE_TYPE.EVENT_LOGOUT
  );
}

export function isRequestReply(messageType: unknown): messageType is string {
  return typeof messageType === 'string' && messageType.startsWith('REQ_');
}