Creatable Combobox

import { clsx, type ClassValue } from "clsx";
import { twMerge } from "tailwind-merge";

export function cn(...inputs: ClassValue[]) {
  return twMerge(clsx(inputs));
}

"use client"

import { Button as ButtonPrimitive } from "@base-ui/react/button"
import { cva, type VariantProps } from "class-variance-authority"

import { cn } from "@/lib/utils"

const buttonVariants = cva(
  "group/button inline-flex shrink-0 items-center justify-center rounded-md border border-transparent bg-clip-padding text-sm font-medium whitespace-nowrap transition-all outline-none select-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 active:not-aria-[haspopup]:translate-y-px disabled:pointer-events-none disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
  {
    variants: {
      variant: {
        default: "bg-primary text-primary-foreground hover:bg-primary/80",
        outline:
          "border-border bg-background shadow-xs hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:border-input dark:bg-input/30 dark:hover:bg-input/50",
        secondary:
          "bg-secondary text-secondary-foreground hover:bg-secondary/80 aria-expanded:bg-secondary aria-expanded:text-secondary-foreground",
        ghost:
          "hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:hover:bg-muted/50",
        destructive:
          "bg-destructive/10 text-destructive hover:bg-destructive/20 focus-visible:border-destructive/40 focus-visible:ring-destructive/20 dark:bg-destructive/20 dark:hover:bg-destructive/30 dark:focus-visible:ring-destructive/40",
        link: "text-primary underline-offset-4 hover:underline",
      },
      size: {
        default:
          "h-9 gap-1.5 px-2.5 in-data-[slot=button-group]:rounded-md has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2",
        xs: "h-6 gap-1 rounded-[min(var(--radius-md),8px)] px-2 text-xs in-data-[slot=button-group]:rounded-md has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 [&_svg:not([class*='size-'])]:size-3",
        sm: "h-8 gap-1 rounded-[min(var(--radius-md),10px)] px-2.5 in-data-[slot=button-group]:rounded-md has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5",
        lg: "h-10 gap-1.5 px-2.5 has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2",
        icon: "size-9",
        "icon-xs":
          "size-6 rounded-[min(var(--radius-md),8px)] in-data-[slot=button-group]:rounded-md [&_svg:not([class*='size-'])]:size-3",
        "icon-sm":
          "size-8 rounded-[min(var(--radius-md),10px)] in-data-[slot=button-group]:rounded-md",
        "icon-lg": "size-10",
      },
    },
    defaultVariants: {
      variant: "default",
      size: "default",
    },
  }
)

function Button({
  className,
  variant = "default",
  size = "default",
  ...props
}: ButtonPrimitive.Props & VariantProps<typeof buttonVariants>) {
  return (
    <ButtonPrimitive
      data-slot="button"
      className={cn(buttonVariants({ variant, size, className }))}
      {...props}
    />
  )
}

export { Button, buttonVariants }

import * as React from "react"
import { Input as InputPrimitive } from "@base-ui/react/input"

import { cn } from "@/lib/utils"

function Input({ className, type, ...props }: React.ComponentProps<"input">) {
  return (
    <InputPrimitive
      type={type}
      data-slot="input"
      className={cn(
        "h-9 w-full min-w-0 rounded-md border border-input bg-transparent px-2.5 py-1 text-base shadow-xs transition-[color,box-shadow] outline-none file:inline-flex file:h-7 file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:pointer-events-none disabled:cursor-not-allowed disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 md:text-sm dark:bg-input/30 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40",
        className
      )}
      {...props}
    />
  )
}

export { Input }

import * as React from "react"

import { cn } from "@/lib/utils"

function Textarea({ className, ...props }: React.ComponentProps<"textarea">) {
  return (
    <textarea
      data-slot="textarea"
      className={cn(
        "flex field-sizing-content min-h-16 w-full rounded-md border border-input bg-transparent px-2.5 py-2 text-base shadow-xs transition-[color,box-shadow] outline-none placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 md:text-sm dark:bg-input/30 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40",
        className
      )}
      {...props}
    />
  )
}

export { Textarea }

"use client"

import * as React from "react"
import { cva, type VariantProps } from "class-variance-authority"

import { cn } from "@/lib/utils"
import { Button } from "@/components/ui/button"
import { Input } from "@/components/ui/input"
import { Textarea } from "@/components/ui/textarea"

function InputGroup({ className, ...props }: React.ComponentProps<"div">) {
  return (
    <div
      data-slot="input-group"
      role="group"
      className={cn(
        "group/input-group relative flex h-9 w-full min-w-0 items-center rounded-md border border-input shadow-xs transition-[color,box-shadow] outline-none in-data-[slot=combobox-content]:focus-within:border-inherit in-data-[slot=combobox-content]:focus-within:ring-0 has-[[data-slot=input-group-control]:focus-visible]:border-ring has-[[data-slot=input-group-control]:focus-visible]:ring-3 has-[[data-slot=input-group-control]:focus-visible]:ring-ring/50 has-[[data-slot][aria-invalid=true]]:border-destructive has-[[data-slot][aria-invalid=true]]:ring-3 has-[[data-slot][aria-invalid=true]]:ring-destructive/20 has-[>[data-align=block-end]]:h-auto has-[>[data-align=block-end]]:flex-col has-[>[data-align=block-start]]:h-auto has-[>[data-align=block-start]]:flex-col has-[>textarea]:h-auto dark:bg-input/30 dark:has-[[data-slot][aria-invalid=true]]:ring-destructive/40 has-[>[data-align=block-end]]:[&>input]:pt-3 has-[>[data-align=block-start]]:[&>input]:pb-3 has-[>[data-align=inline-end]]:[&>input]:pr-1.5 has-[>[data-align=inline-start]]:[&>input]:pl-1.5",
        className
      )}
      {...props}
    />
  )
}

const inputGroupAddonVariants = cva(
  "flex h-auto cursor-text items-center justify-center gap-2 py-1.5 text-sm font-medium text-muted-foreground select-none group-data-[disabled=true]/input-group:opacity-50 [&>kbd]:rounded-[calc(var(--radius)-5px)] [&>svg:not([class*='size-'])]:size-4",
  {
    variants: {
      align: {
        "inline-start":
          "order-first pl-2 has-[>button]:-ml-1 has-[>kbd]:ml-[-0.15rem]",
        "inline-end":
          "order-last pr-2 has-[>button]:-mr-1 has-[>kbd]:mr-[-0.15rem]",
        "block-start":
          "order-first w-full justify-start px-2.5 pt-2 group-has-[>input]/input-group:pt-2 [.border-b]:pb-2",
        "block-end":
          "order-last w-full justify-start px-2.5 pb-2 group-has-[>input]/input-group:pb-2 [.border-t]:pt-2",
      },
    },
    defaultVariants: {
      align: "inline-start",
    },
  }
)

function InputGroupAddon({
  className,
  align = "inline-start",
  ...props
}: React.ComponentProps<"div"> & VariantProps<typeof inputGroupAddonVariants>) {
  return (
    <div
      role="group"
      data-slot="input-group-addon"
      data-align={align}
      className={cn(inputGroupAddonVariants({ align }), className)}
      onClick={(e) => {
        if ((e.target as HTMLElement).closest("button")) {
          return
        }
        e.currentTarget.parentElement?.querySelector("input")?.focus()
      }}
      {...props}
    />
  )
}

const inputGroupButtonVariants = cva(
  "flex items-center gap-2 text-sm shadow-none",
  {
    variants: {
      size: {
        xs: "h-6 gap-1 rounded-[calc(var(--radius)-5px)] px-1.5 [&>svg:not([class*='size-'])]:size-3.5",
        sm: "",
        "icon-xs":
          "size-6 rounded-[calc(var(--radius)-5px)] p-0 has-[>svg]:p-0",
        "icon-sm": "size-8 p-0 has-[>svg]:p-0",
      },
    },
    defaultVariants: {
      size: "xs",
    },
  }
)

function InputGroupButton({
  className,
  type = "button",
  variant = "ghost",
  size = "xs",
  ...props
}: Omit<React.ComponentProps<typeof Button>, "size" | "type"> &
  VariantProps<typeof inputGroupButtonVariants> & {
    type?: "button" | "submit" | "reset"
  }) {
  return (
    <Button
      type={type}
      data-size={size}
      variant={variant}
      className={cn(inputGroupButtonVariants({ size }), className)}
      {...props}
    />
  )
}

function InputGroupText({ className, ...props }: React.ComponentProps<"span">) {
  return (
    <span
      className={cn(
        "flex items-center gap-2 text-sm text-muted-foreground [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4",
        className
      )}
      {...props}
    />
  )
}

function InputGroupInput({
  className,
  ...props
}: React.ComponentProps<"input">) {
  return (
    <Input
      data-slot="input-group-control"
      className={cn(
        "flex-1 rounded-none border-0 bg-transparent shadow-none ring-0 focus-visible:ring-0 aria-invalid:ring-0 dark:bg-transparent",
        className
      )}
      {...props}
    />
  )
}

function InputGroupTextarea({
  className,
  ...props
}: React.ComponentProps<"textarea">) {
  return (
    <Textarea
      data-slot="input-group-control"
      className={cn(
        "flex-1 resize-none rounded-none border-0 bg-transparent py-2 shadow-none ring-0 focus-visible:ring-0 aria-invalid:ring-0 dark:bg-transparent",
        className
      )}
      {...props}
    />
  )
}

export {
  InputGroup,
  InputGroupAddon,
  InputGroupButton,
  InputGroupText,
  InputGroupInput,
  InputGroupTextarea,
}

"use client";

import * as React from "react";
import { Combobox as ComboboxPrimitive } from "@base-ui/react";

import { cn } from "@/lib/utils";
import { Button } from "@/components/ui/button";
import {
  InputGroup,
  InputGroupAddon,
  InputGroupButton,
  InputGroupInput,
} from "@/components/ui/input-group";
import { ChevronDownIcon, XIcon, CheckIcon } from "lucide-react";

const Combobox = ComboboxPrimitive.Root;

function ComboboxValue({ ...props }: ComboboxPrimitive.Value.Props) {
  return <ComboboxPrimitive.Value data-slot="combobox-value" {...props} />;
}

function ComboboxTrigger({
  className,
  children,
  ...props
}: ComboboxPrimitive.Trigger.Props) {
  return (
    <ComboboxPrimitive.Trigger
      data-slot="combobox-trigger"
      className={cn("[&_svg:not([class*='size-'])]:size-4", className)}
      {...props}
    >
      {children}
      <ChevronDownIcon className="pointer-events-none size-4 text-muted-foreground" />
    </ComboboxPrimitive.Trigger>
  );
}

function ComboboxClear({ className, ...props }: ComboboxPrimitive.Clear.Props) {
  return (
    <ComboboxPrimitive.Clear
      data-slot="combobox-clear"
      render={<InputGroupButton variant="ghost" size="icon-xs" />}
      className={cn(className)}
      {...props}
    >
      <XIcon className="pointer-events-none" />
    </ComboboxPrimitive.Clear>
  );
}

function ComboboxInput({
  className,
  children,
  disabled = false,
  showTrigger = true,
  showClear = false,
  ...props
}: ComboboxPrimitive.Input.Props & {
  showTrigger?: boolean;
  showClear?: boolean;
}) {
  return (
    <InputGroup className={cn("w-auto", className)}>
      <ComboboxPrimitive.Input
        render={<InputGroupInput disabled={disabled} />}
        {...props}
      />
      <InputGroupAddon align="inline-end">
        {showTrigger && (
          <InputGroupButton
            size="icon-xs"
            variant="ghost"
            render={<ComboboxTrigger />}
            data-slot="input-group-button"
            className="group-has-data-[slot=combobox-clear]/input-group:hidden data-pressed:bg-transparent"
            disabled={disabled}
          />
        )}
        {showClear && <ComboboxClear disabled={disabled} />}
      </InputGroupAddon>
      {children}
    </InputGroup>
  );
}

function ComboboxContent({
  className,
  side = "bottom",
  sideOffset = 6,
  align = "start",
  alignOffset = 0,
  anchor,
  ...props
}: ComboboxPrimitive.Popup.Props &
  Pick<
    ComboboxPrimitive.Positioner.Props,
    "side" | "align" | "sideOffset" | "alignOffset" | "anchor"
  >) {
  return (
    <ComboboxPrimitive.Portal>
      <ComboboxPrimitive.Positioner
        side={side}
        sideOffset={sideOffset}
        align={align}
        alignOffset={alignOffset}
        anchor={anchor}
        className="isolate z-50"
      >
        <ComboboxPrimitive.Popup
          data-slot="combobox-content"
          data-chips={!!anchor}
          className={cn(
            "group/combobox-content relative max-h-(--available-height) w-(--anchor-width) max-w-(--available-width) min-w-[calc(var(--anchor-width)+--spacing(7))] origin-(--transform-origin) overflow-hidden rounded-md bg-popover text-popover-foreground shadow-md ring-1 ring-foreground/10 duration-100 data-[chips=true]:min-w-(--anchor-width) data-[side=bottom]:slide-in-from-top-2 data-[side=inline-end]:slide-in-from-left-2 data-[side=inline-start]:slide-in-from-right-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 *:data-[slot=input-group]:m-1 *:data-[slot=input-group]:mb-0 *:data-[slot=input-group]:h-8 *:data-[slot=input-group]:border-input/30 *:data-[slot=input-group]:bg-input/30 *:data-[slot=input-group]:shadow-none data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95",
            className,
          )}
          {...props}
        />
      </ComboboxPrimitive.Positioner>
    </ComboboxPrimitive.Portal>
  );
}

function ComboboxList({ className, ...props }: ComboboxPrimitive.List.Props) {
  return (
    <ComboboxPrimitive.List
      data-slot="combobox-list"
      className={cn(
        "no-scrollbar max-h-[min(calc(--spacing(72)---spacing(9)),calc(var(--available-height)---spacing(9)))] scroll-py-1 overflow-y-auto overscroll-contain p-1 data-empty:p-0",
        className,
      )}
      {...props}
    />
  );
}

function ComboboxItem({
  className,
  children,
  ...props
}: ComboboxPrimitive.Item.Props) {
  return (
    <ComboboxPrimitive.Item
      data-slot="combobox-item"
      className={cn(
        "relative flex w-full cursor-default items-center gap-2 rounded-sm py-1.5 pr-8 pl-2 text-sm outline-hidden select-none data-highlighted:bg-accent data-highlighted:text-accent-foreground not-data-[variant=destructive]:data-highlighted:**:text-accent-foreground data-disabled:pointer-events-none data-disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
        className,
      )}
      {...props}
    >
      {children}
      <ComboboxPrimitive.ItemIndicator
        render={
          <span className="pointer-events-none absolute right-2 flex size-4 items-center justify-center" />
        }
      >
        <CheckIcon className="pointer-events-none" />
      </ComboboxPrimitive.ItemIndicator>
    </ComboboxPrimitive.Item>
  );
}

function ComboboxGroup({ className, ...props }: ComboboxPrimitive.Group.Props) {
  return (
    <ComboboxPrimitive.Group
      data-slot="combobox-group"
      className={cn(className)}
      {...props}
    />
  );
}

function ComboboxLabel({
  className,
  ...props
}: ComboboxPrimitive.GroupLabel.Props) {
  return (
    <ComboboxPrimitive.GroupLabel
      data-slot="combobox-label"
      className={cn("px-2 py-1.5 text-xs text-muted-foreground", className)}
      {...props}
    />
  );
}

function ComboboxCollection({ ...props }: ComboboxPrimitive.Collection.Props) {
  return (
    <ComboboxPrimitive.Collection data-slot="combobox-collection" {...props} />
  );
}

function ComboboxEmpty({ className, ...props }: ComboboxPrimitive.Empty.Props) {
  return (
    <ComboboxPrimitive.Empty
      data-slot="combobox-empty"
      className={cn(
        "hidden w-full justify-center py-2 text-center text-sm text-muted-foreground group-data-empty/combobox-content:flex",
        className,
      )}
      {...props}
    />
  );
}

function ComboboxSeparator({
  className,
  ...props
}: ComboboxPrimitive.Separator.Props) {
  return (
    <ComboboxPrimitive.Separator
      data-slot="combobox-separator"
      className={cn("-mx-1 my-1 h-px bg-border", className)}
      {...props}
    />
  );
}

function ComboboxChips({
  className,
  ...props
}: React.ComponentPropsWithRef<typeof ComboboxPrimitive.Chips> &
  ComboboxPrimitive.Chips.Props) {
  return (
    <ComboboxPrimitive.Chips
      data-slot="combobox-chips"
      className={cn(
        "flex min-h-9 flex-wrap items-center gap-1.5 rounded-md border border-input bg-transparent bg-clip-padding px-2.5 py-1.5 text-sm shadow-xs transition-[color,box-shadow] focus-within:border-ring focus-within:ring-3 focus-within:ring-ring/50 has-aria-invalid:border-destructive has-aria-invalid:ring-3 has-aria-invalid:ring-destructive/20 has-data-[slot=combobox-chip]:px-1.5 dark:bg-input/30 dark:has-aria-invalid:border-destructive/50 dark:has-aria-invalid:ring-destructive/40",
        className,
      )}
      {...props}
    />
  );
}

function ComboboxChip({
  className,
  children,
  showRemove = true,
  ...props
}: ComboboxPrimitive.Chip.Props & {
  showRemove?: boolean;
}) {
  return (
    <ComboboxPrimitive.Chip
      data-slot="combobox-chip"
      className={cn(
        "flex h-[calc(--spacing(5.5))] w-fit items-center justify-center gap-1 rounded-sm bg-muted px-1.5 text-xs font-medium whitespace-nowrap text-foreground has-disabled:pointer-events-none has-disabled:cursor-not-allowed has-disabled:opacity-50 has-data-[slot=combobox-chip-remove]:pr-0",
        className,
      )}
      {...props}
    >
      {children}
      {showRemove && (
        <ComboboxPrimitive.ChipRemove
          render={<Button variant="ghost" size="icon-xs" />}
          className="-ml-1 opacity-50 hover:opacity-100"
          data-slot="combobox-chip-remove"
        >
          <XIcon className="pointer-events-none" />
        </ComboboxPrimitive.ChipRemove>
      )}
    </ComboboxPrimitive.Chip>
  );
}

function ComboboxChipsInput({
  className,
  ...props
}: ComboboxPrimitive.Input.Props) {
  return (
    <ComboboxPrimitive.Input
      data-slot="combobox-chip-input"
      className={cn("min-w-16 flex-1 outline-none", className)}
      {...props}
    />
  );
}

function useComboboxAnchor() {
  return React.useRef<HTMLDivElement | null>(null);
}

export {
  Combobox,
  ComboboxInput,
  ComboboxContent,
  ComboboxList,
  ComboboxItem,
  ComboboxGroup,
  ComboboxLabel,
  ComboboxCollection,
  ComboboxEmpty,
  ComboboxSeparator,
  ComboboxChips,
  ComboboxChip,
  ComboboxChipsInput,
  ComboboxTrigger,
  ComboboxValue,
  useComboboxAnchor,
};

"use client";

import * as React from "react";
import {
  Combobox as ComboboxPrimitive,
  ComboboxRootChangeEventDetails,
} from "@base-ui/react";

import { cn } from "@/lib/utils";
import { Combobox } from "@/components/ui/combobox";
import { Plus } from "lucide-react";

// ─── Creatable ────────────────────────────────────────────────────────

type CreatableItem = {
  creatable: true; // literal true, not boolean
  label: string;
  value: string;
};

const isCreatableItem = (item: unknown): item is CreatableItem => {
  return (
    typeof item === "object" &&
    item !== null &&
    (item as CreatableItem).creatable === true
  );
};
// ─── Internal helpers ─────────────────────────────────────────────────────────

/** Display string for an item — mirrors base-ui's own default logic. */
const toLabel = (item: unknown): string => {
  if (typeof item === "string") return item;
  if (item && typeof item === "object") {
    if ("label" in item) return String((item as { label: unknown }).label);
    if ("value" in item) return String((item as { value: unknown }).value);
  }
  return String(item);
};

/** Equality key for an item — prefers .value for stable identity. */
const toValueKey = (item: unknown): string => {
  if (typeof item === "string") return item;
  if (item && typeof item === "object") {
    if ("value" in item) return String((item as { value: unknown }).value);
    if ("label" in item) return String((item as { label: unknown }).label);
  }
  return String(item);
};

// ─── CreatableCombobox ────────────────────────────────────────────────────────

type ComboboxRootProps = React.ComponentProps<typeof ComboboxPrimitive.Root>;

type CreatableComboboxProps = ComboboxRootProps & {
  /**
   * Called when the user confirms a new value that doesn't exist in the list.
   * Receives the raw typed string value.
   */
  /**
   * onValueChange will never be called with a CreatableItem.
   * Use onCreateValue to handle new value creation.
   */
  onCreateValue: (value: string) => void;

  /** Label for the "Create" option. Defaults to `Create "${value}"`. */
  createLabel?: (value: string) => string;

  /** Where the create option appears in the list. Defaults to "first". */
  createOptionPosition?: "first" | "last";
};

/**
 * A combobox that allows the user to create new values.
 *
 * @description
 * Follows the base-ui creatable combobox example pattern:
 * https://base-ui.com/react/components/combobox#creatable
 *
 * Instead of a boolean flag, `creatable` holds the raw typed string.
 * This means isCreatableItem doubles as a type guard AND gives you the original
 * query back without any extra state — `item.creatable` is the value to create.
 *
 * @param props - The props for the creatable combobox.
 * @param props.items - The items of the creatable combobox.
 * @param props.onCreateValue - The function to call when the user creates a new value.
 * @param props.createLabel - The label for the create option.
 * @param props.createOptionPosition - The position of the create option in the list.
 * @see https://base-ui.com/react/components/combobox
 * @returns The creatable combobox.
 */
function CreatableCombobox({
  children,
  items = [],
  onCreateValue,
  createLabel = (v) => `Create "${v}"`,
  createOptionPosition = "first",
  ...props
}: CreatableComboboxProps) {
  const [query, setQuery] = React.useState<string>("");
  const pendingCreateRef = React.useRef<string | null>(null);

  // Augment items with the creatable item if there's no exact match
  const augmentedItems = (() => {
    const trimmedQuery = query.trim();

    if (!trimmedQuery) return items;

    const lowered = trimmedQuery.toLocaleLowerCase();
    const exactMatch = items.some(
      (item) => toLabel(item).toLocaleLowerCase() === lowered,
    );

    if (exactMatch) return items;

    // Show the creatable item alongside matches
    const createItem: CreatableItem = {
      creatable: true,
      label: createLabel(trimmedQuery),
      value: trimmedQuery,
    };

    return createOptionPosition === "first"
      ? [createItem, ...items]
      : [...items, createItem];
  })();

  const handleValueChange = (
    next: unknown,
    details: ComboboxRootChangeEventDetails,
  ) => {
    // multiple select
    if (props.multiple && Array.isArray(next)) {
      const creatable = next.find(isCreatableItem);
      const clean = next.filter((item) => !isCreatableItem(item));

      if (creatable) {
        pendingCreateRef.current = creatable.value;
        setQuery("");
      }

      props.onValueChange?.(clean, details);
      return;
    }

    // single select
    if (isCreatableItem(next)) {
      pendingCreateRef.current = next.value;
      setQuery("");
      // return;
    }

    // pass through overrides or use base-ui default onValueChange behavior
    props.onValueChange?.(next, details);
  };

  return (
    <Combobox
      {...props}
      items={augmentedItems}
      inputValue={query}
      onInputValueChange={setQuery}
      onValueChange={handleValueChange}
      onOpenChangeComplete={(open) => {
        if (!open && pendingCreateRef.current) {
          onCreateValue(pendingCreateRef.current);
          pendingCreateRef.current = null;
        }
        props.onOpenChangeComplete?.(open);
      }}
      itemToStringLabel={(item: unknown): string => {
        if (isCreatableItem(item)) return item.value;
        // pass through overrides or uses base-ui default itemToStringLabel
        return props.itemToStringLabel?.(item) ?? toLabel(item);
      }}
      isItemEqualToValue={(a: unknown, b: unknown) => {
        if (isCreatableItem(a) || isCreatableItem(b)) {
          return toValueKey(a) === toValueKey(b);
        }
        // pass through overrides or uses base-ui default Object.is
        return props.isItemEqualToValue?.(a, b) ?? Object.is(a, b);
      }}
    >
      {children}
    </Combobox>
  );
}

function ComboboxItemCreatable({
  className,
  children,
  value,
  showPlus = true,
  ...props
}: Omit<ComboboxPrimitive.Item.Props, "value"> & {
  value: CreatableItem;
  showPlus?: boolean;
}) {
  return (
    <ComboboxPrimitive.Item
      data-creatable
      data-slot="combobox-item"
      value={value}
      className={cn(
        "relative flex w-full cursor-default items-center gap-2 rounded-sm py-1.5 pr-8 pl-2 text-sm outline-hidden select-none data-highlighted:bg-accent data-highlighted:text-accent-foreground data-[disabled]:pointer-events-none data-[disabled]:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
        className,
      )}
      {...props}
    >
      {showPlus && <Plus className="size-3.5 shrink-0 opacity-60" />}
      {children ?? value.label}
    </ComboboxPrimitive.Item>
  );
}

export {
  CreatableCombobox,
  type CreatableComboboxProps,
  ComboboxItemCreatable,
  type CreatableItem,
  isCreatableItem,
};