import getBasePlacement from "./getBasePlacement.js";
import getVariation from "./getVariation.js";
import getMainAxisFromPlacement from "./getMainAxisFromPlacement.js";
import { left, right, bottom, top, end, start } from "../enums.js";
function computeOffsets(_ref) {
  var reference = _ref.reference, element = _ref.element, placement = _ref.placement;
  var basePlacement = placement ? getBasePlacement(placement) : null;
  var variation = placement ? getVariation(placement) : null;
  var commonX = reference.x + reference.width / 2 - element.width / 2;
  var commonY = reference.y + reference.height / 2 - element.height / 2;
  var offsets;
  switch (basePlacement) {
    case top:
      offsets = {
        x: commonX,
        y: reference.y - element.height
      };
      break;
    case bottom:
      offsets = {
        x: commonX,
        y: reference.y + reference.height
      };
      break;
    case right:
      offsets = {
        x: reference.x + reference.width,
        y: commonY
      };
      break;
    case left:
      offsets = {
        x: reference.x - element.width,
        y: commonY
      };
      break;
    default:
      offsets = {
        x: reference.x,
        y: reference.y
      };
  }
  var mainAxis = basePlacement ? getMainAxisFromPlacement(basePlacement) : null;
  if (mainAxis != null) {
    var len = mainAxis === "y" ? "height" : "width";
    switch (variation) {
      case start:
        offsets[mainAxis] = offsets[mainAxis] - (reference[len] / 2 - element[len] / 2);
        break;
      case end:
        offsets[mainAxis] = offsets[mainAxis] + (reference[len] / 2 - element[len] / 2);
        break;
    }
  }
  return offsets;
}
export {
  computeOffsets as default
};
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