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))
  }
}

export const loadBuckets = () => async (
  dispatch: Dispatch<Action>,
  getState: GetState
) => {
  const queryURL = getState().links.query.self
  const orgID = getState().orgs.org.id

  dispatch(setBuilderBucketsStatus(RemoteDataState.Loading))

  try {
    const buckets = await queryBuilderFetcher.findBuckets({
      url: queryURL,
      orgID,
    })

    const selectedBucket = getActiveQuery(getState()).builderConfig.buckets[0]

    dispatch(setBuilderBuckets(buckets))

    if (selectedBucket && buckets.includes(selectedBucket)) {
      dispatch(selectBucket(selectedBucket))
    } else {
      dispatch(selectBucket(buckets[0], true))
    }
  } catch (e) {
    if (e instanceof CancellationError) {
      return
    }

    console.error(e)
    dispatch(setBuilderBucketsStatus(RemoteDataState.Error))
  }
}

) => async (dispatch, getState: GetState): Promise<void> => {
  const variables = getHydratedVariables(getState(), dashboardID)
  const dashboard = getState().dashboards.list.find(d => d.id === dashboardID)

  dispatch(selectValue(dashboardID, variableID, value))

  await dispatch(refreshVariableValues(dashboard.id, variables))
}

export const executeQueries = () => async (dispatch, getState: GetState) => {
  const {view, timeRange} = getActiveTimeMachine(getState())
  const queries = view.properties.queries.filter(({text}) => !!text.trim())

  if (!queries.length) {
    dispatch(setQueryResults(RemoteDataState.Done, [], null))
  }

  try {
    dispatch(setQueryResults(RemoteDataState.Loading, null, null, null))

    await dispatch(refreshTimeMachineVariableValues())

    const orgID = getState().orgs.org.id
    const activeTimeMachineID = getState().timeMachines.activeTimeMachineID
    const variableAssignments = [
      ...getVariableAssignments(getState(), activeTimeMachineID),
      ...getTimeRangeVars(timeRange),
    ]

    const startTime = Date.now()

    pendingResults.forEach(({cancel}) => cancel())

    pendingResults = queries.map(({text}) =>
      executeQueryWithVars(orgID, text, variableAssignments)
    )

    const results = await Promise.all(pendingResults.map(r => r.promise))

    const duration = Date.now() - startTime
    const files = results.map(r => r.csv)

    files.forEach(checkQueryResult)

    dispatch(setQueryResults(RemoteDataState.Done, files, duration))
  } catch (e) {
    if (e instanceof CancellationError) {
      return
    }

    if (get(e, 'status') === RATE_LIMIT_ERROR_STATUS) {
      const retryAfter = get(e, 'headers.Retry-After')
      dispatch(notify(rateLimitReached(retryAfter)))
    }

    console.error(e)
    dispatch(setQueryResults(RemoteDataState.Error, null, null, e.message))
  }
}

export const getMembers = () => async (
  dispatch: Dispatch<Action>,
  getState: GetState
) => {
  try {
    const {
      orgs: {
        org: {id},
      },
    } = getState()
    dispatch(setMembers(RemoteDataState.Loading))

    const [owners, members] = await Promise.all([
      client.organizations.owners(id),
      client.organizations.members(id),
    ])

    const users = [...owners, ...members]

    dispatch(setMembers(RemoteDataState.Done, users))
  } catch (e) {
    console.error(e)
    dispatch(setMembers(RemoteDataState.Error))
  }
}

export const cloneDashboard = (dashboard: Dashboard) => async (
  dispatch,
  getState: GetState
): Promise<void> => {
  try {
    const {
      orgs: {org},
      dashboards,
    } = getState()

    const allDashboardNames = dashboards.list.map(d => d.name)

    const clonedName = incrementCloneName(allDashboardNames, dashboard.name)

    const data = await client.dashboards.clone(dashboard.id, clonedName, org.id)

    dispatch(checkDashboardLimits())
    dispatch(push(`/orgs/${org.id}/dashboards/${data.id}`))
  } catch (error) {
    console.error(error)
    if (isLimitError(error)) {
      dispatch(notify(copy.resourceLimitReached('dashboards')))
    } else {
      dispatch(notify(copy.dashboardCreateFailed()))
    }
  }
}