import { isArray } from "../../../../../@vue/shared/dist/shared.esm-bundler.mjs";
import { useNamespace } from "../../../hooks/use-namespace/index.mjs";
import { selectGroupKey } from "./token.mjs";
import { useMutationObserver } from "../../../../node_modules/@vueuse/core/index.mjs";
import { defineComponent, ref, getCurrentInstance, provide, reactive, toRefs, computed, onMounted, isVNode } from "vue";
import castArray from "../../../../../lodash-es/castArray.mjs";
var option_group_vue_vue_type_script_lang_default = defineComponent({
  name: "ElOptionGroup",
  componentName: "ElOptionGroup",
  props: {
    label: String,
    disabled: Boolean
  },
  setup(props) {
    const ns = useNamespace("select");
    const groupRef = ref();
    const instance = getCurrentInstance();
    const children = ref([]);
    provide(selectGroupKey, reactive({ ...toRefs(props) }));
    const visible = computed(() => children.value.some((option) => option.visible === true));
    const isOption = (node) => {
      var _a;
      return node.type.name === "ElOption" && !!((_a = node.component) == null ? void 0 : _a.proxy);
    };
    const flattedChildren = (node) => {
      const nodes = castArray(node);
      const children2 = [];
      nodes.forEach((child) => {
        var _a;
        if (!isVNode(child)) return;
        if (isOption(child)) children2.push(child.component.proxy);
        else if (isArray(child.children) && child.children.length) children2.push(...flattedChildren(child.children));
        else if ((_a = child.component) == null ? void 0 : _a.subTree) children2.push(...flattedChildren(child.component.subTree));
      });
      return children2;
    };
    const updateChildren = () => {
      children.value = flattedChildren(instance.subTree);
    };
    onMounted(() => {
      updateChildren();
    });
    useMutationObserver(groupRef, updateChildren, {
      attributes: true,
      subtree: true,
      childList: true
    });
    return {
      groupRef,
      visible,
      ns
    };
  }
});
export {
  option_group_vue_vue_type_script_lang_default as default
};
