export const refreshTimeMachineVariableValues = () => async (
  dispatch,
  getState: GetState
) => {
  const contextID = getState().timeMachines.activeTimeMachineID

  // Find variables currently used by queries in the TimeMachine
  const {view, draftQueries} = getActiveTimeMachine(getState())
  const draftView = {
    ...view,
    properties: {...view.properties, queries: draftQueries},
  }
  const variables = extractVariablesList(getState())
  const variablesInUse = filterUnusedVars(variables, [view, draftView])

  // Find variables whose values have already been loaded by the TimeMachine
  // (regardless of whether these variables are currently being used)
  const hydratedVariables = getHydratedVariables(getState(), contextID)

  // Refresh values for all variables with existing values and in use variables
  const variablesToRefresh = variables.filter(
    v => variablesInUse.includes(v) || hydratedVariables.includes(v)
  )

  await dispatch(refreshVariableValues(contextID, variablesToRefresh))
}

) => async (dispatch: Dispatch<Action>, getState: GetState): Promise<void> => {
  dispatch(setValues(contextID, RemoteDataState.Loading))

  try {
    const {
      orgs: {org},
    } = getState()
    const url = getState().links.query.self
    const selections = getValueSelections(getState(), contextID)
    const allVariables = extractVariablesList(getState())

    if (pendingValueRequests[contextID]) {
      pendingValueRequests[contextID].cancel()
    }

    pendingValueRequests[contextID] = hydrateVars(variables, allVariables, {
      url,
      orgID: org.id,
      selections,
    })

    const values = await pendingValueRequests[contextID].promise

    dispatch(setValues(contextID, RemoteDataState.Done, values))
  } catch (e) {
    if (e instanceof CancellationError) {
      return
    }

    console.error(e)
    dispatch(setValues(contextID, RemoteDataState.Error))
  }
}

) => (dispatch, getState: GetState) => {
  const variables = extractVariablesList(getState())
  const variablesInUse = filterUnusedVars(variables, nextViews)

  return dispatch(refreshVariableValues(dashboard.id, variablesInUse))
}