/*
action creators related to embeddings choice
*/

import { AnnoMatrixObsCrossfilter } from "../annoMatrix";
import { _setEmbeddingSubset } from "../util/stateManager/viewStackHelpers";

export async function _switchEmbedding(
  prevAnnoMatrix,
  prevCrossfilter,
  newEmbeddingName
) {
  /*
  DRY helper used by embedding action creators
  */
  const base = prevAnnoMatrix.base();
  const embeddingDf = await base.fetch("emb", newEmbeddingName);
  const annoMatrix = _setEmbeddingSubset(prevAnnoMatrix, embeddingDf);
  const obsCrossfilter = await new AnnoMatrixObsCrossfilter(
    annoMatrix,
    prevCrossfilter.obsCrossfilter
  ).select("emb", newEmbeddingName, {
    mode: "all",
  });
  return [annoMatrix, obsCrossfilter];
}

export const layoutChoiceAction =
  (newLayoutChoice) => async (dispatch, getState) => {
    /*
  On layout choice, make sure we have selected all on the previous layout, AND the new
  layout.
  */
    const { annoMatrix: prevAnnoMatrix, obsCrossfilter: prevCrossfilter } =
      getState();
    const [annoMatrix, obsCrossfilter] = await _switchEmbedding(
      prevAnnoMatrix,
      prevCrossfilter,
      newLayoutChoice
    );
    dispatch({
      type: "set layout choice",
      layoutChoice: newLayoutChoice,
      obsCrossfilter,
      annoMatrix,
    });
  };