import getVariation from "./getVariation.js";
import { variationPlacements, basePlacements, placements as allPlacements } from "../enums.js";
import detectOverflow from "./detectOverflow.js";
import getBasePlacement from "./getBasePlacement.js";

/*:: type OverflowsMap = { [ComputedPlacement]: number }; */

/*;; type OverflowsMap = { [key in ComputedPlacement]: number }; */
export default function computeAutoPlacement(state, options) {
  if (options === void 0) {
    options = {};
  }

  var _options = options,
      placement = _options.placement,
      boundary = _options.boundary,
      rootBoundary = _options.rootBoundary,
      padding = _options.padding,
      flipVariations = _options.flipVariations,
      _options$allowedAutoP = _options.allowedAutoPlacements,
      allowedAutoPlacements = _options$allowedAutoP === void 0 ? allPlacements : _options$allowedAutoP;
  var variation = getVariation(placement);
  var placements = variation ? flipVariations ? variationPlacements : variationPlacements.filter(function (placement) {
    return getVariation(placement) === variation;
  }) : basePlacements;
  var allowedPlacements = placements.filter(function (placement) {
    return allowedAutoPlacements.indexOf(placement) >= 0;
  });

  if (allowedPlacements.length === 0) {
    allowedPlacements = placements;

    if (false) {
      console.error(['Popper: The `allowedAutoPlacements` option did not allow any', 'placements. Ensure the `placement` option matches the variation', 'of the allowed placements.', 'For example, "auto" cannot be used to allow "bottom-start".', 'Use "auto-start" instead.'].join(' '));
    }
  } // $FlowFixMe[incompatible-type]: Flow seems to have problems with two array unions...


  var overflows = allowedPlacements.reduce(function (acc, placement) {
    acc[placement] = detectOverflow(state, {
      placement: placement,
      boundary: boundary,
      rootBoundary: rootBoundary,
      padding: padding
    })[getBasePlacement(placement)];
    return acc;
  }, {});
  return Object.keys(overflows).sort(function (a, b) {
    return overflows[a] - overflows[b];
  });
}