import getBasePlacement from "../utils/getBasePlacement.js";
import getLayoutRect from "../dom-utils/getLayoutRect.js";
import contains from "../dom-utils/contains.js";
import getOffsetParent from "../dom-utils/getOffsetParent.js";
import getMainAxisFromPlacement from "../utils/getMainAxisFromPlacement.js";
import { within } from "../utils/within.js";
import mergePaddingObject from "../utils/mergePaddingObject.js";
import expandToHashMap from "../utils/expandToHashMap.js";
import { basePlacements, top, left, bottom, right } from "../enums.js";
var toPaddingObject = function toPaddingObject2(padding, state) {
  padding = typeof padding === "function" ? padding(Object.assign({}, state.rects, {
    placement: state.placement
  })) : padding;
  return mergePaddingObject(typeof padding !== "number" ? padding : expandToHashMap(padding, basePlacements));
};
function arrow(_ref) {
  var _state$modifiersData$;
  var state = _ref.state, name = _ref.name, options = _ref.options;
  var arrowElement = state.elements.arrow;
  var popperOffsets = state.modifiersData.popperOffsets;
  var basePlacement = getBasePlacement(state.placement);
  var axis = getMainAxisFromPlacement(basePlacement);
  var isVertical = [left, right].indexOf(basePlacement) >= 0;
  var len = isVertical ? "height" : "width";
  if (!arrowElement || !popperOffsets) {
    return;
  }
  var paddingObject = toPaddingObject(options.padding, state);
  var arrowRect = getLayoutRect(arrowElement);
  var minProp = axis === "y" ? top : left;
  var maxProp = axis === "y" ? bottom : right;
  var endDiff = state.rects.reference[len] + state.rects.reference[axis] - popperOffsets[axis] - state.rects.popper[len];
  var startDiff = popperOffsets[axis] - state.rects.reference[axis];
  var arrowOffsetParent = getOffsetParent(arrowElement);
  var clientSize = arrowOffsetParent ? axis === "y" ? arrowOffsetParent.clientHeight || 0 : arrowOffsetParent.clientWidth || 0 : 0;
  var centerToReference = endDiff / 2 - startDiff / 2;
  var min = paddingObject[minProp];
  var max = clientSize - arrowRect[len] - paddingObject[maxProp];
  var center = clientSize / 2 - arrowRect[len] / 2 + centerToReference;
  var offset = within(min, center, max);
  var axisProp = axis;
  state.modifiersData[name] = (_state$modifiersData$ = {}, _state$modifiersData$[axisProp] = offset, _state$modifiersData$.centerOffset = offset - center, _state$modifiersData$);
}
function effect(_ref2) {
  var state = _ref2.state, options = _ref2.options;
  var _options$element = options.element, arrowElement = _options$element === void 0 ? "[data-popper-arrow]" : _options$element;
  if (arrowElement == null) {
    return;
  }
  if (typeof arrowElement === "string") {
    arrowElement = state.elements.popper.querySelector(arrowElement);
    if (!arrowElement) {
      return;
    }
  }
  if (!contains(state.elements.popper, arrowElement)) {
    return;
  }
  state.elements.arrow = arrowElement;
}
const arrow$1 = {
  name: "arrow",
  enabled: true,
  phase: "main",
  fn: arrow,
  effect,
  requires: ["popperOffsets"],
  requiresIfExists: ["preventOverflow"]
};
export {
  arrow$1 as default
};
//# sourceMappingURL=arrow.js.map
