import {
  menuArrowClass,
  menuButtonClass,
  menuClass,
  menuContainerClass,
  menuDividerClass,
  menuGroupClass,
  menuHeaderClass,
  menuItemClass,
  radioGroupClass,
  subMenuClass,
} from '../utils';

const bem =
  (block: string) =>
  (element?: string) =>
  (modifier?: string): string => {
    let selector = `.${block}`;
    if (element) selector += `__${element}`;
    if (modifier) selector += `--${modifier}`;
    return selector;
  };

const createSelector = (blockElement: (modifier?: string) => string, modifiers: string[] = []) => {
  const selectorObj = {};
  Object.defineProperty(selectorObj, 'name', {
    value: blockElement(),
    enumerable: true,
  });

  modifiers.forEach((modifier) => {
    const selector = modifier.split('-').reduce((prev, curr) => `${prev}${curr[0].toUpperCase()}${curr.slice(1)}`);
    Object.defineProperty(selectorObj, selector, {
      value: blockElement(modifier),
      enumerable: true,
    });
  });

  return selectorObj;
};

const directions = ['dir-left', 'dir-right', 'dir-top', 'dir-bottom'];
const menuBlock = bem(menuClass);
const menuSelector = createSelector(menuBlock(), [
  'state-opening',
  'state-open',
  'state-closing',
  'state-closed',
  ...directions,
]);
const menuArrowSelector = createSelector(menuBlock(menuArrowClass), directions);
const menuItemSelector = createSelector(menuBlock(menuItemClass), [
  'hover',
  'disabled',
  'anchor',
  'checked',
  'open',
  'submenu',
  'focusable',
  'type-radio',
  'type-checkbox',
]);

const menuDividerSelector = createSelector(menuBlock(menuDividerClass));
const menuHeaderSelector = createSelector(menuBlock(menuHeaderClass));
const menuGroupSelector = createSelector(menuBlock(menuGroupClass));
const radioGroupSelector = createSelector(menuBlock(radioGroupClass));
const submenuSelector = createSelector(menuBlock(subMenuClass));
const menuContainerSelector = createSelector(bem(menuContainerClass)(), ['itemTransition']);
const menuButtonSelector = createSelector(bem(menuButtonClass)(), ['open']);

export {
  menuArrowSelector,
  menuButtonSelector,
  menuContainerSelector,
  menuDividerSelector,
  menuGroupSelector,
  menuHeaderSelector,
  menuItemSelector,
  menuSelector,
  radioGroupSelector,
  submenuSelector,
};