"use client";

import type {Key} from "@heroui/react";

import {
  Autocomplete,
  EmptyState,
  Label,
  ListBox,
  SearchField,
  Tag,
  TagGroup,
  useFilter,
} from "@heroui/react";
import {useState} from "react";

export function TagGroupSelection() {
  const tags = [
    {id: "react", name: "React"},
    {id: "typescript", name: "TypeScript"},
    {id: "javascript", name: "JavaScript"},
    {id: "nodejs", name: "Node.js"},
    {id: "python", name: "Python"},
    {id: "vue", name: "Vue"},
    {id: "angular", name: "Angular"},
    {id: "nextjs", name: "Next.js"},
  ];

  const [selectedKeys, setSelectedKeys] = useState<Key[]>([]);
  const {contains} = useFilter({sensitivity: "base"});

  const onRemoveTags = (keys: Set<Key>) => {
    setSelectedKeys((prev) => prev.filter((key) => !keys.has(key)));
  };

  return (
    <Autocomplete
      className="w-[256px]"
      placeholder="选择标签"
      selectionMode="multiple"
      value={selectedKeys}
      onChange={(keys) => setSelectedKeys(keys as Key[])}
    >
      <Label>标签</Label>
      <Autocomplete.Trigger>
        <Autocomplete.Value>
          {({defaultChildren, isPlaceholder, state}) => {
            if (isPlaceholder || state.selectedItems.length === 0) {
              return defaultChildren;
            }

            const selectedItemsKeys = state.selectedItems.map((item) => item.key);

            return (
              <TagGroup size="sm" onRemove={onRemoveTags}>
                <TagGroup.List>
                  {selectedItemsKeys.map((selectedItemKey) => {
                    const tag = tags.find((t) => t.id === selectedItemKey);

                    if (!tag) return null;

                    return (
                      <Tag key={tag.id} id={tag.id}>
                        {tag.name}
                      </Tag>
                    );
                  })}
                </TagGroup.List>
              </TagGroup>
            );
          }}
        </Autocomplete.Value>
        <Autocomplete.ClearButton />
        <Autocomplete.Indicator />
      </Autocomplete.Trigger>
      <Autocomplete.Popover>
        <Autocomplete.Filter filter={contains}>
          <SearchField autoFocus name="search" variant="secondary">
            <SearchField.Group>
              <SearchField.SearchIcon />
              <SearchField.Input placeholder="搜索标签…" />
              <SearchField.ClearButton />
            </SearchField.Group>
          </SearchField>
          <ListBox renderEmptyState={() => <EmptyState>未找到标签</EmptyState>}>
            {tags.map((tag) => (
              <ListBox.Item key={tag.id} id={tag.id} textValue={tag.name}>
                {tag.name}
                <ListBox.ItemIndicator />
              </ListBox.Item>
            ))}
          </ListBox>
        </Autocomplete.Filter>
      </Autocomplete.Popover>
    </Autocomplete>
  );
}
