import { State } from '../types/redux';
import { currentBackend } from '../backend';
import { ThunkDispatch } from 'redux-thunk';
import { AnyAction } from 'redux';
import { actions as notifActions } from 'redux-notifications';

const { notifSend } = notifActions;

export const STATUS_REQUEST = 'STATUS_REQUEST';
export const STATUS_SUCCESS = 'STATUS_SUCCESS';
export const STATUS_FAILURE = 'STATUS_FAILURE';

export function statusRequest() {
  return {
    type: STATUS_REQUEST,
  };
}

export function statusSuccess(status: { auth: boolean }) {
  return {
    type: STATUS_SUCCESS,
    payload: { status },
  };
}

export function statusFailure(error: Error) {
  return {
    type: STATUS_FAILURE,
    error,
  };
}

export function checkBackendStatus() {
  return async (dispatch: ThunkDispatch<State, {}, AnyAction>, getState: () => State) => {
    try {
      const state = getState();
      if (state.status.get('isFetching') === true) {
        return;
      }

      dispatch(statusRequest());
      const backend = currentBackend(state.config);
      const status = await backend.status();

      const authError = status.auth === false;
      if (authError) {
        const key = 'ui.toast.onLoggedOut';
        const existingNotification = state.notifs.find(n => n.message?.key === key);
        if (!existingNotification) {
          dispatch(
            notifSend({
              message: {
                key: 'ui.toast.onLoggedOut',
              },
              kind: 'danger',
            }),
          );
        }
      }

      dispatch(statusSuccess(status));
    } catch (error) {
      dispatch(statusFailure(error));
    }
  };
}