export function interpet(state: IStoreState, action: R2D2Action): IStoreState {
  switch (action.type) {
    case ADD_DEVICE:
      return {
        ...state, devices: state.devices.concat(randomDevice())
      };
    case REFRESH_DEVICES:
      fetch(`http://localhost:8080/devices`)
        .then(response => response.json().then(body => ({ response, body })))
        .then(({ response, body }) => {
          const devices = body as IDevices
          // dispatch(updateDevices(devices))
        });
      return state;

    case UPDATE_DEVICE:
      return {
        ...state, devices: state.devices.map(device => {
          if (device.deviceId === action.deviceId) {
            return { deviceId: device.deviceId, lastFA: action.lastFA }
          }
          return device
        })
      };
    case SET_DEVICES:
      return {
        ...state, devices: action.devices
      };
    }
  return state;
}