import { clearCellOverlays, processCellOverlays } from "./overlays.js";

const metadata = {};
let metadataCounter = 0;
function createMetadata(data) {
  const id = metadataCounter;
  metadata[id] = data;
  metadataCounter++;
  return id;
}
export function setDomMetadata(domNode, data) {
  if (domNode.dataset.metadata) {
    metadata[Number(domNode.dataset.metadata)] = data;
    return;
  }
  domNode.dataset.metadata = createMetadata(data).toString(10);
}
export function setCellMetadata(node, key, value) {
  if (!node.dataset.metadata) {
    node.dataset.metadata = createMetadata({ [key]: value }).toString(10);
  } else {
    metadata[Number(node.dataset.metadata)][key] = value;
  }
  processCellOverlays(node, key, true);
}

export function getMetadata(id) {
  if (typeof id === "object") {
    // assume DOM element
    if (id.dataset && id.dataset.metadata) {
      return getMetadata(id.dataset.metadata);
    }
    return null;
  }
  if (typeof id === "string") {
    return getMetadata(Number(id));
  }
  return metadata[id];
}
export function getCellMetadata(node, key) {
  return metadata[Number(node.dataset.metadata)][key];
}

export function deleteMetadata(id) {
  if (typeof id === "object") {
    // assume DOM object
    if (id.dataset && id.dataset.metadata) {
      clearCellOverlays(id);
      return deleteMetadata(id.dataset.metadata);
    }
  }
  delete metadata[id];
}
export function clearCellMetadata(node, key) {
  if (!node.dataset.metadata) return;
  delete metadata[Number(node.dataset.metadata)][key];
  processCellOverlays(node, key, false);
}