function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = null == arr ? null : "undefined" != typeof Symbol && arr[Symbol.iterator] || arr["@@iterator"]; if (null != _i) { var _s, _e, _x, _r, _arr = [], _n = !0, _d = !1; try { if (_x = (_i = _i.call(arr)).next, 0 === i) { if (Object(_i) !== _i) return; _n = !1; } else for (; !(_n = (_s = _x.call(_i)).done) && (_arr.push(_s.value), _arr.length !== i); _n = !0) { ; } } catch (err) { _d = !0, _e = err; } finally { try { if (!_n && null != _i.return && (_r = _i.return(), Object(_r) !== _r)) return; } finally { if (_d) throw _e; } } return _arr; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
function _objectWithoutProperties(source, excluded) { if (source == null) return {}; var target = _objectWithoutPropertiesLoose(source, excluded); var key, i; if (Object.getOwnPropertySymbols) { var sourceSymbolKeys = Object.getOwnPropertySymbols(source); for (i = 0; i < sourceSymbolKeys.length; i++) { key = sourceSymbolKeys[i]; if (excluded.indexOf(key) >= 0) continue; if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue; target[key] = source[key]; } } return target; }
function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }
import { getContrast } from 'polished';
import { forwardRef, useCallback, useMemo } from 'react';
import { ColorMode, useColorModes } from './ColorMode';
import { jsx as _jsx } from "react/jsx-runtime";
var isColorAlias = function isColorAlias(mode, color) {
  return Object.keys(mode).includes(color);
};
export var Background = /*#__PURE__*/forwardRef(function (_ref, ref) {
  var bg = _ref.bg,
    rest = _objectWithoutProperties(_ref, ["bg"]);
  var _useColorModes = useColorModes(),
    _useColorModes2 = _slicedToArray(_useColorModes, 4),
    active = _useColorModes2[0],
    activeColors = _useColorModes2[1],
    modes = _useColorModes2[2],
    getColorValue = _useColorModes2[3];
  /** If a color alias was used then look up the true color key from the active mode */
  var trueColor = useMemo(function () {
    if (isColorAlias(activeColors, bg)) {
      return activeColors[bg];
    }
    return bg;
  }, [bg, activeColors]);
  var getTextContrast = useCallback(function (foreground) {
    return getContrast(getColorValue(foreground), getColorValue(trueColor));
  }, [trueColor, getColorValue]);

  /**
   * This compares the contrast of the selected background color
   * and each color modes body text and returns the mode that has
   * the highest contrast standard. This is not perfect as it is
   * probable that certain color modes will never be reachable if
   * there are more than 2 color modes.
   *
   * This does not guarantee a level of A/AA/AA compliance.
   */

  var accessibleMode = useMemo(function () {
    var activeMode = modes[active],
      otherModes = _objectWithoutProperties(modes, [active].map(_toPropertyKey));
    var possibleModes = Object.entries(otherModes);

    /**
     * Reduce all remaining modes to the mode key with the highest contrast
     * value.
     *
     * TODO: Add a tiebreaker.  This could possibly have other dimensions as
     * it will likely fail to return a mode outside of the lightest and
     * darkest versions.
     */
    var _possibleModes$reduce = possibleModes.reduce(function (_ref2, _ref3) {
        var _ref4 = _slicedToArray(_ref2, 2),
          prevMode = _ref4[0],
          prevContrast = _ref4[1];
        var _ref5 = _slicedToArray(_ref3, 2),
          mode = _ref5[0],
          text = _ref5[1].text;
        var contrast = getTextContrast(text);

        // Keep the higher contrast mode.
        return contrast > prevContrast ? [mode, contrast] : [prevMode, prevContrast];
      }, [active, getTextContrast(activeMode.text)]),
      _possibleModes$reduce2 = _slicedToArray(_possibleModes$reduce, 1),
      highestContrastMode = _possibleModes$reduce2[0];
    return highestContrastMode;
  }, [modes, active, getTextContrast]);
  return /*#__PURE__*/_jsx(ColorMode, _objectSpread(_objectSpread({}, rest), {}, {
    mode: accessibleMode,
    bg: bg,
    ref: ref
  }));
});