import { debounce } from "lodash";

export const SETTING_CHANGE = "SETTING_CHANGE";
export const SETTING_SAVE   = "SETTING_SAVE";

export function changeSetting(path, value) {
  return dispatch => {
    dispatch({
      type: SETTING_CHANGE,
      path,
      value,
    });

    dispatch(saveSettings());
  };
}

const debouncedSave = debounce((dispatch, getState) => {
  if (getState().getIn(["settings", "saved"])) {
    return;
  }

  const data = getState().get("settings").filter((_, path) => path !== "saved").toJS();

  localStorage.setItem("web_settings", JSON.stringify(data));
  dispatch({ type: SETTING_SAVE });
}, 5000, { trailing: true });

export function saveSettings() {
  return (dispatch, getState) => debouncedSave(dispatch, getState);
}