'use strict';

function anatomy(name, map = {}) {
  let called = false;
  function assert() {
    if (!called) {
      called = true;
      return;
    }
    throw new Error(
      "[anatomy] .part(...) should only be called once. Did you mean to use .extend(...) ?"
    );
  }
  function parts(...values) {
    assert();
    for (const part of values) {
      map[part] = toPart(part);
    }
    return anatomy(name, map);
  }
  function extend(...parts2) {
    for (const part of parts2) {
      if (part in map)
        continue;
      map[part] = toPart(part);
    }
    return anatomy(name, map);
  }
  function selectors() {
    const value = Object.fromEntries(
      Object.entries(map).map(([key, part]) => [key, part.selector])
    );
    return value;
  }
  function classnames() {
    const value = Object.fromEntries(
      Object.entries(map).map(([key, part]) => [key, part.className])
    );
    return value;
  }
  function toPart(part) {
    const el = ["container", "root"].includes(part ?? "") ? [name] : [name, part];
    const attr = el.filter(Boolean).join("__");
    const className = `chakra-${attr}`;
    const partObj = {
      className,
      selector: `.${className}`,
      toString: () => part
    };
    return partObj;
  }
  const __type = {};
  return {
    parts,
    toPart,
    extend,
    selectors,
    classnames,
    get keys() {
      return Object.keys(map);
    },
    __type
  };
}

exports.anatomy = anatomy;