import type { IChecker } from "../../checker/config/types";
import type { TCheckerGroupItemsProp, TCheckerGroupItem, ICheckerGroupItemsGroup } from "../config/types";

interface IGetCheckedItemsParams {
  type?: "checkbox" | "radio";
  name?: string;
  value?: string;
  checked?: boolean;
}

/**
 * Получает элементы с состоянием `checked`
 * @returns
 */
export const getCheckedItems = (
  items: TCheckerGroupItemsProp = [],
  params: IGetCheckedItemsParams
): TCheckerGroupItemsProp => {
  const {
    type = "checkbox",
    name = "",
    value = "",
    checked = false,
  } = params;

  const getIsCheckedItem = (item: IChecker): boolean => {
    if (type === "checkbox") {
      if (name === item.name) {
        return checked;
      }
      return !!item.isChecked;
    }
    return value === item.value;
  };

  const getIsGroup = (group: TCheckerGroupItem): group is ICheckerGroupItemsGroup => {
    return "items" in group && Array.isArray(group.items) && !!group.items.length;
  };

  const getIsCheckedGroup = (group: TCheckerGroupItem): TCheckerGroupItem => {
    const isNested = getIsGroup(group);

    if (isNested) {
      return {
        ...group,
        items: group.items.map((item) => {
          return getIsCheckedGroup(item);
        }),
      };
    } else {
      return {
        ...group,
        isChecked: getIsCheckedItem(group),
      };
    }
  };

  return [ ...items ].map((item = {}) => {
    return getIsCheckedGroup(item);
  });
};