Volume Profile

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

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

"use client";

import { useEffect, useState } from "react";

/**
 * Returns true only on devices that have a true hover (mouse / trackpad).
 * Touch devices fire phantom `:hover` on tap that sticks until tap-elsewhere
 * — gate hover-only effects (scale lifts, magnetic pulls) behind this.
 */
export function useHoverCapable() {
  const [canHover, setCanHover] = useState(false);

  useEffect(() => {
    if (typeof window === "undefined" || !window.matchMedia) return;
    const mq = window.matchMedia("(hover: hover) and (pointer: fine)");
    const update = () => setCanHover(mq.matches);
    update();
    mq.addEventListener?.("change", update);
    return () => mq.removeEventListener?.("change", update);
  }, []);

  return canHover;
}

// Shared motion tokens. Easing curves mirror the CSS custom properties in
// globals.css; springs are the canonical physics used across components.
// Strong custom variants — defaults like `ease-in`/`ease-out` feel weak.

export const EASE_OUT = [0.16, 1, 0.3, 1] as const;
export const EASE_IN_OUT = [0.77, 0, 0.175, 1] as const;
export const EASE_DRAWER = [0.32, 0.72, 0, 1] as const;

/** CSS string form of EASE_OUT for inline style transitions. */
export const EASE_OUT_CSS = "cubic-bezier(0.16, 1, 0.3, 1)";

/** Press feedback on buttons and other tappable surfaces. */
export const SPRING_PRESS = {
  type: "spring",
  stiffness: 500,
  damping: 30,
  mass: 0.6,
} as const;

/** Content swaps — label/icon slots trading places inside a control. */
export const SPRING_SWAP = {
  type: "spring",
  stiffness: 460,
  damping: 30,
  mass: 0.55,
} as const;

/** Overlay panel entrances — modals and sheets summoned by pointer. */
export const SPRING_PANEL = {
  type: "spring",
  stiffness: 420,
  damping: 40,
  mass: 0.5,
} as const;

/** Shared-layout glides — pills, indicators and panels morphing between positions. */
export const SPRING_LAYOUT = {
  type: "spring",
  stiffness: 360,
  damping: 32,
  mass: 0.6,
} as const;

/** Cursor-follow physics for decorative mouse tracking (magnetic, tilt, dock). */
export const SPRING_MOUSE = {
  stiffness: 200,
  damping: 15,
  mass: 0.3,
} as const;

/** Dragged handles and fills (sliders) — critically damped `useSpring` config,
 * so the value follows the pointer butterily and never rebounds off an end. */
export const SPRING_GLIDE = {
  stiffness: 700,
  damping: 50,
  mass: 0.5,
} as const;

"use client";

import { type RefObject, useEffect } from "react";

/**
 * What the dismissing gesture does to the control it landed on.
 *
 * `"pass-through"` is the platform norm (native popover light-dismiss): the
 * tap closes the overlay *and* activates whatever was under it. Use
 * `"consume"` where the open overlay sits over or beside controls that would
 * be costly to trigger by accident — the dismissal then swallows the
 * activation too, so the gesture only closes.
 */
export type DismissBehavior = "pass-through" | "consume";

export interface DismissOptions {
  /** Default `"pass-through"`. */
  behavior?: DismissBehavior;
  /** Dismiss on Escape as well. Default true. */
  escape?: boolean;
  /** Return true for an outside target that should *not* dismiss. Must be stable. */
  ignore?: (target: Element) => boolean;
}

/**
 * What every currently open dismiss scope counts as inside itself. A consumed
 * dismissal reads this to tell a stray gesture from one that belongs to an
 * overlay in front of it: overlays have no shared z-order to consult, but the
 * one the gesture landed in has said as much by registering it.
 */
const openScopes = new Set<(target: Element) => boolean>();

function claimedByAnotherScope(
  self: (target: Element) => boolean,
  target: Element,
) {
  for (const scope of openScopes) {
    if (scope !== self && scope(target)) return true;
  }
  return false;
}

// preventDefault on pointerdown does not suppress the click that follows, so
// consuming a gesture means swallowing that click itself. The swallower
// deliberately outlives the effect that installed it — the dismissal it
// belongs to has already unmounted or re-rendered by the time the click lands.
// It releases on that click, or on the next gesture if the pointer is dragged
// away and no click ever arrives, so it can never eat a later one. A keydown
// releases it too: a gesture that ends with neither a click nor a cancel would
// otherwise leave it armed, and the click Enter synthesizes on some focused
// control is not the one this dismissal was owed.
function consumeActivation(source: Event) {
  const swallow = (event: MouseEvent) => {
    event.preventDefault();
    event.stopPropagation();
    release();
  };
  const restart = (event: Event) => {
    if (event !== source) release();
  };
  const release = () => {
    window.removeEventListener("click", swallow, true);
    window.removeEventListener("pointerdown", restart, true);
    window.removeEventListener("pointercancel", restart, true);
    window.removeEventListener("keydown", release, true);
  };
  window.addEventListener("click", swallow, true);
  window.addEventListener("pointerdown", restart, true);
  window.addEventListener("pointercancel", restart, true);
  window.addEventListener("keydown", release, true);
}

/**
 * Close an open overlay on Escape or a pointerdown outside `ref`. Pass `null`
 * for `ref` when what counts as inside isn't one element, and say so with
 * `ignore` instead.
 *
 * The pointerdown listener is capture-phase: a bubble-phase one is blinded by
 * any handler in between that stops propagation, and an overlay cannot know
 * what it is layered over. `onDismiss` and `ignore` must be stable (wrap in
 * useCallback) so the listeners aren't re-bound every render while open.
 */
export function useDismiss(
  open: boolean,
  onDismiss: () => void,
  ref: RefObject<HTMLElement | SVGElement | null> | null,
  {
    behavior = "pass-through",
    escape: dismissOnEscape = true,
    ignore,
  }: DismissOptions = {},
) {
  useEffect(() => {
    if (!open) return;
    const inside = (target: Element) =>
      Boolean(ref?.current?.contains(target)) || Boolean(ignore?.(target));
    const onKey = (event: KeyboardEvent) => {
      if (dismissOnEscape && event.key === "Escape") onDismiss();
    };
    const onPointer = (event: PointerEvent) => {
      const target = event.target as Element | null;
      if (!target || inside(target)) return;
      // Outside this overlay, but inside one that is also open: the gesture is
      // that overlay's to answer, and swallowing its click from behind would
      // cost the user the control they actually aimed at.
      if (behavior === "consume" && !claimedByAnotherScope(inside, target)) {
        consumeActivation(event);
      }
      onDismiss();
    };
    openScopes.add(inside);
    window.addEventListener("keydown", onKey);
    window.addEventListener("pointerdown", onPointer, true);
    return () => {
      openScopes.delete(inside);
      window.removeEventListener("keydown", onKey);
      window.removeEventListener("pointerdown", onPointer, true);
    };
  }, [open, onDismiss, ref, behavior, dismissOnEscape, ignore]);
}

"use client";

import { useMemo, useRef } from "react";
import { isHoveringPointer } from "@/lib/touch";

interface BoundaryEvent {
  pointerId: number;
  pointerType: string;
  buttons: number;
}

export interface HoverGesture {
  /** True when this enter starts a hover: the pointer arrived resting, not pressing. */
  enter: (event: BoundaryEvent) => boolean;
  /** True when this leave ends a hover that entered as one. */
  leave: (event: BoundaryEvent) => boolean;
}

/**
 * Pairs a surface's enter with its leave, per pointer.
 *
 * `isHoveringPointer` answers the question the *enter* asks — is this pointer
 * resting on the surface or pressing it — and both boundary cases go wrong if
 * the leave is asked the same question again:
 *
 * - A pen with no hover never rests. It arrives in contact, taps, and the spec
 *   then requires its boundary events after `pointerup`, so the leave carries
 *   `buttons: 0` and reads as a mouse gliding off. Hover teardown then undid
 *   the tap — the panel the pen had just opened closed under it.
 * - A mouse pressed on the surface and dragged off leaves with `buttons: 1`.
 *   Skipping teardown there strands the surface open: the release happens
 *   outside, and no second leave ever comes.
 *
 * So the state a hover holds is released by the pointer that took it, whatever
 * the buttons say at the boundary, and a pointer that arrived in contact never
 * took it in the first place. Contact is the exception tracked here, not
 * hover: a leave from a pointer this surface never saw enter — mounted under
 * the cursor, say — still counts, since the alternative is state with no way
 * out.
 */
export function useHoverGesture(): HoverGesture {
  const contact = useRef(new Set<number>());

  return useMemo(
    () => ({
      enter: (event) => {
        if (isHoveringPointer(event)) {
          contact.current.delete(event.pointerId);
          return true;
        }
        contact.current.add(event.pointerId);
        return false;
      },
      leave: (event) => {
        const arrivedInContact = contact.current.delete(event.pointerId);
        return !arrivedInContact && event.pointerType !== "touch";
      },
    }),
    [],
  );
}

"use client";

import { useMemo, useRef } from "react";

/** What a pointerdown recorded, read back by the click that ends its gesture. */
export interface TapRecord<S> {
  /** Which input started the gesture. */
  pointerType: string;
  /** What the surface was showing when it started. */
  state: S;
}

export interface TapGesture<S> {
  /** Record the gesture a pointerdown starts, with the state it starts in. */
  start: (event: { pointerType: string }, state: S) => void;
  /** Read the record and clear it. `null` when no pointer is behind this click. */
  take: () => TapRecord<S> | null;
  /** Drop the record: this gesture will never spend it on a click. */
  drop: () => void;
}

/**
 * The pointer gesture behind a click, recorded where the click cannot report
 * it. A `click` carries no `pointerType` in the engines that matter, so the
 * `pointerdown` before it is the only thing that says which input activated
 * the control — and whether one did at all, since keyboard activation
 * synthesizes a click with no pointer behind it.
 *
 * State goes in with the record because a click reports that no better: a
 * browser that focuses a control on contact can open the very panel the tap
 * was meant to open, and reading "is it open" at click time then undoes it.
 * What the gesture started against is what it acts on.
 *
 * The record is spent by one click and dropped by everything else, because a
 * record that outlives its gesture is worse than none:
 *
 * - A scroll or an OS gesture takes the touch away — `pointercancel`, no click
 *   ever — and the finger would sit in the record until some later click.
 * - That later click is often `Enter` on a keyboard, which arrives with no
 *   pointerdown of its own and would inherit the abandoned finger. A keydown
 *   is the start of a keyboard activation and never part of a tap, so it drops
 *   the record too.
 *
 * Both ends have to be wired by the surface: `drop` on `onPointerCancel` and
 * on `onKeyDown`.
 */
export function useTapGesture<S>(): TapGesture<S> {
  const record = useRef<TapRecord<S> | null>(null);

  return useMemo(
    () => ({
      start: (event, state) => {
        record.current = { pointerType: event.pointerType, state };
      },
      take: () => {
        const spent = record.current;
        record.current = null;
        return spent;
      },
      drop: () => {
        record.current = null;
      },
    }),
    [],
  );
}

// Shared touch primitives. iOS and iPadOS run their own gestures on top of the
// page — the long-press selection callout and the selection it drags in with
// it — and they win: once the platform claims a touch it cancels ours
// mid-gesture, so a press-and-hold or a drag simply dies. Surfaces that own
// their gesture have to opt out.
//
// What the two classes below cover, precisely:
// - `-webkit-touch-callout: none` stops iOS's long-press callout. WebKit-only:
//   it is not a property other engines have, so it is inert everywhere else.
// - `user-select: none` stops the long-press selection on every engine,
//   Android included, and stops a drag from painting a selection under the
//   cursor. It is inherited, so it reaches every descendant — which is why the
//   two classes differ only in whether they apply it unconditionally.
// What neither covers:
// - Chrome for Android's long-press menu on a link or an image. No CSS
//   suppresses it; a gesture surface that wraps one needs its own
//   `onContextMenu` with `preventDefault()`.
// - The native drag of an `<img>` or `<a>` descendant. `-webkit-user-drag` is
//   not inherited and plain divs and buttons are not drag sources, so setting
//   it on the surface does nothing — the child itself needs `draggable={false}`.

/**
 * Classes for a surface that *is* the control: a thumb, a drum, a stage, a
 * handle, a hold button. Selection is suppressed on every input, because a
 * drag that highlights the control's own label is wrong on a mouse too.
 * Compose with `touch-none` when the surface also owns the scroll axis — leave
 * it off when the page must still scroll from there.
 */
export const TOUCH_GESTURE_CLASS = "select-none [-webkit-touch-callout:none]";

/**
 * The same opt-out for a gesture surface that wraps content the consumer owns:
 * a scroller, a context-menu trigger, a sheet header, a list row. Selection is
 * suppressed only where the platform runs its own press gestures — a coarse
 * pointer — so a mouse user can still select and copy that content. If the
 * gesture itself would paint a selection under the cursor, add `select-none`
 * for the duration of the gesture rather than reaching for
 * `TOUCH_GESTURE_CLASS`.
 *
 * `pointer: coarse` describes the *primary* pointer and nothing else, so a
 * hybrid machine reads it wrong in both directions: a tablet with a mouse
 * plugged in keeps touch as primary and loses mouse selection, and a laptop
 * with a touchscreen keeps the mouse as primary and leaves selection live
 * under a finger. No media query can answer per interaction — the query is
 * about the device, and the question is about the gesture in progress. The
 * default stays here because it is right on the machines that are one thing or
 * the other, and losing a selection is a nuisance; where the miss costs a
 * *gesture* instead, the surface pairs it with `holdSelection` on the press.
 */
export const TOUCH_GESTURE_CONTENT_CLASS =
  "[-webkit-touch-callout:none] pointer-coarse:select-none";

/**
 * Suppress selection on `element` for as long as a gesture is running on it,
 * whatever the primary pointer of the machine happens to be. Returns the
 * release. Inline, so it wins over the class above and is gone again the
 * moment the gesture ends.
 *
 * For the press gestures a native selection would otherwise steal — a
 * long-press that opens a menu. Elsewhere prefer the classes: a surface that
 * takes selection away for the whole session is a surface whose text nobody
 * can copy.
 */
export function holdSelection(element: HTMLElement) {
  element.style.setProperty("user-select", "none");
  element.style.setProperty("-webkit-user-select", "none");
  return () => {
    element.style.removeProperty("user-select");
    element.style.removeProperty("-webkit-user-select");
  };
}

/**
 * Pointer capture, best effort. WebKit throws `NotFoundError` when the pointer
 * is already gone by the time the handler runs — routine on iOS, where the
 * system can claim the touch first — and an uncaught throw takes the rest of
 * the handler, the gesture included, down with it. Touch pointers carry
 * implicit capture anyway, so losing it is never fatal.
 */
export function capturePointer(element: Element, pointerId: number) {
  try {
    element.setPointerCapture(pointerId);
  } catch {
    // Pointer is no longer active — implicit capture still applies on touch.
  }
}

/** Release a capture taken with `capturePointer`, ignoring a stale pointer. */
export function releasePointer(element: Element, pointerId: number) {
  try {
    if (element.hasPointerCapture(pointerId)) {
      element.releasePointerCapture(pointerId);
    }
  } catch {
    // Capture was already dropped by the browser.
  }
}

/**
 * Whether this event came from a pointer that is *hovering*: not a touch, and
 * not currently pressed. Which input the user is holding right now is not
 * something a device capability can answer — a touchscreen laptop hovers and
 * taps, and iPadOS reports a fine hovering pointer for a finger — so both
 * paths stay live and each handler branches on the event it was given.
 *
 * A pen resting on the glass is making contact, not hovering: `buttons` is the
 * tell, and it sends a pen tap down the same route a finger takes.
 *
 * This answers what an *enter* asks. A leave is the other half of a pair and
 * has to be read against the enter that started it — `useHoverGesture` in
 * `lib/hooks/use-hover-gesture` does that, and hover surfaces should use it
 * rather than asking this question twice.
 */
export const isHoveringPointer = (event: {
  pointerType: string;
  buttons: number;
}) => event.pointerType !== "touch" && event.buttons === 0;

"use client";
// beui.dev/charts/volume-profile

import { cn } from "@/lib/utils";
import {
  VolumeProfileContext,
  useVolumeProfileModel,
  type VolumeProfileProps,
} from "./volume-profile/context";
import { VolumeProfilePlot } from "./volume-profile/plot";
import { VolumeProfileSummary } from "./volume-profile/summary";
import { VolumeProfileTooltip } from "./volume-profile/tooltip";

/** Compose Plot, Tooltip and Summary, or omit children for the complete chart. */
export function VolumeProfile({
  data,
  label,
  unit,
  formatPrice,
  formatVolume,
  valueArea,
  color,
  pocColor,
  activeId,
  defaultActiveId,
  onActiveChange,
  className,
  children,
  ...props
}: VolumeProfileProps) {
  const model = useVolumeProfileModel({
    data,
    label,
    unit,
    formatPrice,
    formatVolume,
    valueArea,
    color,
    pocColor,
    activeId,
    defaultActiveId,
    onActiveChange,
  });
  return (
    <VolumeProfileContext.Provider value={model}>
      <section
        aria-label={model.label}
        {...props}
        data-slot="volume-profile"
        className={cn("min-w-0 w-full space-y-5", className)}
      >
        {children === undefined ? (
          <>
            <VolumeProfilePlot />
            <VolumeProfileTooltip />
            <VolumeProfileSummary />
          </>
        ) : (
          children
        )}
        <div className="sr-only">
          <table>
            <caption>{model.label} data</caption>
            <thead>
              <tr>
                <th scope="col">Price range</th>
                <th scope="col">Volume ({model.unit})</th>
                <th scope="col">Share</th>
                <th scope="col">Level</th>
              </tr>
            </thead>
            <tbody>
              {model.rows.map((row) => (
                <tr key={row.id}>
                  <th scope="row">
                    {model.formatPrice(row.priceLow)} to {model.formatPrice(row.priceHigh)}
                  </th>
                  <td>{model.formatVolume(row.volume)}</td>
                  <td>{(row.share * 100).toFixed(1)}%</td>
                  <td>
                    {row.isPoc
                      ? "Point of control"
                      : row.inValueArea
                        ? "Inside value area"
                        : model.valueArea
                          ? "Outside value area"
                          : "—"}
                  </td>
                </tr>
              ))}
            </tbody>
          </table>
        </div>
      </section>
    </VolumeProfileContext.Provider>
  );
}

export { useVolumeProfile } from "./volume-profile/context";
export type { VolumeProfileProps } from "./volume-profile/context";
export type { VolumeProfileBin, VolumeProfileRow } from "./volume-profile/model";
export { VolumeProfilePlot } from "./volume-profile/plot";
export type { VolumeProfilePlotProps } from "./volume-profile/plot";
export { VolumeProfileSummary } from "./volume-profile/summary";
export { VolumeProfileTooltip } from "./volume-profile/tooltip";
export type { VolumeProfileTooltipProps } from "./volume-profile/tooltip";

"use client";

import { useReducedMotion } from "motion/react";
import {
  createContext,
  useCallback,
  useContext,
  useId,
  useLayoutEffect,
  useMemo,
  useRef,
  useState,
  type ComponentProps,
} from "react";
import { useHoverCapable } from "@/lib/hooks/use-hover-capable";
import { buildVolumeProfile, type VolumeProfileBin } from "./model";

const formatNumber = (value: number) => value.toLocaleString("en-US", { maximumFractionDigits: 2 });

export interface VolumeProfileProps extends ComponentProps<"section"> {
  /** Already-aggregated executed volume. Sorted by price; unequal bins and gaps are supported. */
  data: readonly VolumeProfileBin[];
  label?: string;
  unit?: string;
  formatPrice?: (price: number) => string;
  formatVolume?: (volume: number) => string;
  /** Target fraction, default 0.7. Whole bins may cover less; the POC is always included.
   * Set false to hide the value area. Equal-volume POCs favor the lower price. */
  valueArea?: number | false;
  color?: string;
  pocColor?: string;
  activeId?: string | null;
  defaultActiveId?: string | null;
  onActiveChange?: (id: string | null) => void;
}

export function useVolumeProfileModel({
  data,
  label = "Volume profile",
  unit = "units",
  formatPrice = formatNumber,
  formatVolume = formatNumber,
  valueArea = 0.7,
  color = "#6366f1",
  pocColor = "#f59e0b",
  activeId,
  defaultActiveId = null,
  onActiveChange,
}: VolumeProfileProps) {
  const model = useMemo(() => buildVolumeProfile(data, valueArea), [data, valueArea]);
  const [internalId, setInternalId] = useState(defaultActiveId);
  if (internalId !== null && !model.rows.some((row) => row.id === internalId)) setInternalId(null);
  const requestedId = activeId === undefined ? internalId : activeId;
  const activeIndex = model.rows.findIndex((row) => row.id === requestedId);
  const active = model.rows[activeIndex] ?? null;
  const [tooltipOpen, setTooltipOpen] = useState(false);
  const plotRef = useRef<HTMLDivElement>(null);
  const tooltipId = useId();
  const latest = useRef({ activeId, requestedId, onActiveChange });
  useLayoutEffect(() => {
    latest.current = { activeId, requestedId, onActiveChange };
  });
  const setActive = useCallback((id: string | null) => {
    const current = latest.current;
    if (current.activeId === undefined) setInternalId(id);
    if (current.requestedId !== id) current.onActiveChange?.(id);
  }, []);
  const describe = (row: (typeof model.rows)[number]) =>
    [
      `${formatPrice(row.priceLow)} to ${formatPrice(row.priceHigh)}`,
      `${formatVolume(row.volume)} ${unit}`,
      `${(row.share * 100).toFixed(1)}% of total volume`,
      row.isPoc ? "Point of control" : row.inValueArea ? "Inside value area" : null,
    ]
      .filter(Boolean)
      .join(". ");
  return {
    ...model,
    label,
    unit,
    formatPrice,
    formatVolume,
    color,
    pocColor,
    describe,
    active,
    activeIndex,
    setActive,
    plotRef,
    tooltipId,
    tooltipOpen,
    setTooltipOpen,
    reduce: useReducedMotion(),
    canHover: useHoverCapable(),
  };
}

export const VolumeProfileContext = createContext<ReturnType<typeof useVolumeProfileModel> | null>(
  null,
);

export function useVolumeProfile() {
  const context = useContext(VolumeProfileContext);
  if (!context) throw new Error("Volume profile parts must be rendered inside VolumeProfile.");
  return context;
}

export interface VolumeProfileBin {
  /** Stable identity for this price range across data updates. */
  id: string;
  priceLow: number;
  priceHigh: number;
  /** Executed volume in this range, in the consumer's chosen unit. */
  volume: number;
}

export function buildVolumeProfile(data: readonly VolumeProfileBin[], target: number | false) {
  if (target !== false && (!Number.isFinite(target) || target <= 0 || target > 1))
    throw new Error("VolumeProfile: valueArea must be a fraction above 0 and at most 1, or false.");
  const bins = [...data].sort((a, b) => a.priceLow - b.priceLow);
  const ids = new Set<string>();
  let totalVolume = 0;
  let maxVolume = 0;
  let pocIndex = -1;
  for (const [index, bin] of bins.entries()) {
    if (ids.has(bin.id)) throw new Error(`VolumeProfile: duplicate bin ID "${bin.id}".`);
    ids.add(bin.id);
    if (
      !Number.isFinite(bin.priceLow) ||
      !Number.isFinite(bin.priceHigh) ||
      bin.priceHigh <= bin.priceLow ||
      !Number.isFinite(bin.volume) ||
      bin.volume < 0
    )
      throw new Error(
        "VolumeProfile: bins need finite increasing price bounds and nonnegative volume.",
      );
    if (index > 0 && bin.priceLow < bins[index - 1].priceHigh)
      throw new Error("VolumeProfile: price ranges must not overlap.");
    totalVolume += bin.volume;
    // Equal maxima keep the lower-price bin as a deterministic POC.
    if (bin.volume > maxVolume) {
      maxVolume = bin.volume;
      pocIndex = index;
    }
  }
  const priceLow = bins[0]?.priceLow ?? 0;
  const priceHigh = bins.at(-1)?.priceHigh ?? 1;
  const span = priceHigh - priceLow;
  if (!Number.isFinite(totalVolume) || !Number.isFinite(span))
    throw new Error("VolumeProfile: the total volume and price span must remain finite.");
  let lowIndex = pocIndex;
  let highIndex = pocIndex;
  let areaVolume = pocIndex >= 0 ? bins[pocIndex].volume : 0;
  if (target === 1 && pocIndex >= 0) {
    // A 100% target includes every bin, including empty edge bins, without
    // depending on floating-point summation order during adjacent expansion.
    lowIndex = 0;
    highIndex = bins.length - 1;
    areaVolume = totalVolume;
  } else if (target !== false && pocIndex >= 0) {
    const targetVolume = totalVolume * target;
    // Grow a contiguous area from the POC using the larger adjacent volume.
    // Ties favor the nearer row, then the higher price. Stop before adding a
    // row that would exceed the target; the POC itself is always included.
    while (areaVolume < targetVolume) {
      const below = bins[lowIndex - 1];
      const above = bins[highIndex + 1];
      if (!below && !above) break;
      const takeAbove =
        !below ||
        (!!above &&
          (above.volume > below.volume ||
            (above.volume === below.volume &&
              highIndex + 1 - pocIndex <= pocIndex - (lowIndex - 1))));
      const next = takeAbove ? above : below;
      if (!next || areaVolume + next.volume > targetVolume) break;
      areaVolume += next.volume;
      if (takeAbove) highIndex++;
      else lowIndex--;
    }
  }
  const valueArea =
    target !== false && pocIndex >= 0
      ? {
          priceLow: bins[lowIndex].priceLow,
          priceHigh: bins[highIndex].priceHigh,
          volume: areaVolume,
          share: areaVolume / totalVolume,
          target,
        }
      : null;
  const rows = bins.map((bin, index) => ({
    ...bin,
    price: bin.priceLow + (bin.priceHigh - bin.priceLow) / 2,
    top: (priceHigh - bin.priceHigh) / span,
    height: (bin.priceHigh - bin.priceLow) / span,
    center: (priceHigh - (bin.priceLow + (bin.priceHigh - bin.priceLow) / 2)) / span,
    proportion: maxVolume ? bin.volume / maxVolume : 0,
    share: totalVolume ? bin.volume / totalVolume : 0,
    isPoc: index === pocIndex,
    inValueArea: valueArea !== null && index >= lowIndex && index <= highIndex,
  }));
  return {
    rows,
    poc: rows[pocIndex] ?? null,
    valueArea,
    totalVolume,
    maxVolume,
    priceLow,
    priceHigh,
  };
}

export type VolumeProfileRow = ReturnType<typeof buildVolumeProfile>["rows"][number];

"use client";

import { motion } from "motion/react";
import { useRef, type PointerEvent, type ReactNode } from "react";
import { EASE_OUT, SPRING_LAYOUT } from "@/lib/ease";
import { cn } from "@/lib/utils";
import { useVolumeProfile } from "./context";

export interface VolumeProfilePlotProps {
  className?: string;
  barClassName?: string;
  /** Plot height is set by className; default 20rem. */
  showAxes?: boolean;
  children?: ReactNode;
}

export function VolumeProfilePlot({
  className,
  barClassName,
  showAxes = true,
  children,
}: VolumeProfilePlotProps) {
  const {
    rows,
    label,
    maxVolume,
    priceLow,
    priceHigh,
    valueArea,
    formatPrice,
    formatVolume,
    color,
    pocColor,
    activeIndex,
    setActive,
    plotRef,
    tooltipId,
    tooltipOpen,
    setTooltipOpen,
    describe,
    reduce,
    canHover,
  } = useVolumeProfile();
  const pointerDriven = useRef(false);
  const focused = useRef(false);
  const lastPointerId = useRef<string | null>(null);
  const index = Math.max(activeIndex, 0);
  const row = rows[index];
  const inspect = (event: PointerEvent<HTMLInputElement>) => {
    const bounds = event.currentTarget.getBoundingClientRect();
    if (!bounds.height) return;
    const fraction = Math.min(1, Math.max(0, (event.clientY - bounds.top) / bounds.height));
    // Hit-test real price geometry, including unequal bins and empty price gaps.
    const match =
      rows.find((item) => fraction >= item.top && fraction <= item.top + item.height) ??
      rows.reduce((nearest, item) =>
        Math.abs(item.center - fraction) < Math.abs(nearest.center - fraction) ? item : nearest,
      );
    setActive(match.id);
    if (lastPointerId.current !== match.id) setTooltipOpen(true);
    lastPointerId.current = match.id;
  };
  if (!rows.length)
    return (
      <p className={cn("py-12 text-center text-sm text-muted-foreground", className)}>
        No volume data
      </p>
    );
  return (
    <div data-slot="volume-profile-plot" className={cn("min-w-0", showAxes && "pb-6")}>
      <div className={cn("flex h-80 min-w-0 gap-3", className)}>
        {showAxes ? (
          <div
            aria-hidden="true"
            className="relative shrink-0 text-right font-mono text-[10px] tabular-nums text-muted-foreground sm:text-xs"
          >
            {[1, 0.75, 0.5, 0.25, 0].map((position) => (
              <span key={position}>
                <span className="invisible block">
                  {formatPrice(priceLow + (priceHigh - priceLow) * position)}
                </span>
                <span
                  className="absolute right-0 -translate-y-1/2"
                  style={{ top: `${(1 - position) * 100}%` }}
                >
                  {formatPrice(priceLow + (priceHigh - priceLow) * position)}
                </span>
              </span>
            ))}
          </div>
        ) : null}
        <div
          ref={plotRef}
          className="relative min-w-0 flex-1 rounded-sm has-focus-visible:outline-2 has-focus-visible:outline-offset-4 has-focus-visible:outline-ring"
        >
          <div aria-hidden="true" className="pointer-events-none absolute inset-0">
            {[0, 0.25, 0.5, 0.75, 1].map((position) => (
              <span
                key={position}
                className="absolute inset-y-0 border-l border-border/60"
                style={{ left: `${position * 100}%` }}
              />
            ))}
            {rows.map((item, i) => (
              <div
                key={item.id}
                data-volume-bin={item.id}
                data-poc={item.isPoc || undefined}
                data-value-area={item.inValueArea || undefined}
                className="absolute inset-x-0 overflow-hidden py-px"
                style={{ top: `${item.top * 100}%`, height: `${item.height * 100}%` }}
              >
                <motion.div
                  className={cn("h-full w-full rounded-r-sm", barClassName)}
                  style={{
                    backgroundColor: item.isPoc ? pocColor : color,
                    transformOrigin: "left",
                  }}
                  initial={{ opacity: 0, transform: `scaleX(${item.proportion})` }}
                  animate={{
                    opacity: item.isPoc || item.inValueArea || !valueArea ? 0.9 : 0.3,
                    transform: `scaleX(${item.proportion})`,
                  }}
                  transition={{
                    transform: reduce ? { duration: 0 } : SPRING_LAYOUT,
                    opacity: { duration: 0.18, ease: EASE_OUT },
                  }}
                />
                <motion.div
                  className="absolute inset-0 bg-foreground/5"
                  initial={false}
                  animate={{ opacity: tooltipOpen && activeIndex === i ? 1 : 0 }}
                  transition={{ duration: 0.1, ease: EASE_OUT }}
                />
                {item.isPoc ? (
                  <span
                    className="absolute inset-x-0 top-1/2 border-t border-dashed"
                    style={{ borderColor: pocColor }}
                  >
                    <span className="absolute right-0 -translate-y-1/2 rounded bg-background px-1.5 py-0.5 font-mono text-[10px] font-medium text-foreground">
                      POC
                    </span>
                  </span>
                ) : null}
              </div>
            ))}
          </div>
          <input
            type="range"
            min={0}
            max={rows.length - 1}
            step={1}
            value={index}
            aria-label={`${label}: inspect price level`}
            aria-orientation="vertical"
            aria-valuetext={describe(row)}
            aria-describedby={tooltipOpen && activeIndex >= 0 ? tooltipId : undefined}
            className="absolute inset-0 m-0 h-full w-full cursor-crosshair opacity-0"
            style={{ writingMode: "vertical-lr", direction: "rtl", touchAction: "pan-x" }}
            onFocus={() => {
              focused.current = true;
              if (!pointerDriven.current) {
                setActive(row.id);
                setTooltipOpen(true);
              }
            }}
            onBlur={() => {
              focused.current = false;
              pointerDriven.current = false;
              setTooltipOpen(false);
            }}
            onPointerEnter={(event) => {
              if (canHover && event.pointerType !== "touch") inspect(event);
            }}
            onPointerMove={(event) => {
              if (
                event.pointerType === "touch"
                  ? event.buttons === 1
                  : canHover || event.buttons === 1
              )
                inspect(event);
            }}
            onPointerLeave={() => {
              lastPointerId.current = null;
              if (!focused.current || pointerDriven.current) setTooltipOpen(false);
            }}
            onPointerDown={(event) => {
              pointerDriven.current = true;
              lastPointerId.current = null;
              inspect(event);
            }}
            onPointerCancel={() => {
              pointerDriven.current = false;
              setTooltipOpen(false);
            }}
            onClick={() => {
              pointerDriven.current = false;
            }}
            onKeyDown={(event) => {
              pointerDriven.current = false;
              if (event.key === "Escape") setTooltipOpen(false);
              else if (
                ["ArrowUp", "ArrowDown", "ArrowLeft", "ArrowRight", "Home", "End"].includes(
                  event.key,
                )
              ) {
                if (activeIndex < 0) setActive(row.id);
                setTooltipOpen(true);
              }
            }}
            onChange={(event) => {
              if (pointerDriven.current) return;
              const next = rows[Number(event.target.value)];
              if (next) {
                setActive(next.id);
                setTooltipOpen(true);
              }
            }}
          />
          {showAxes ? (
            <div
              aria-hidden="true"
              className="absolute inset-x-0 top-full mt-2 flex justify-between font-mono text-[10px] tabular-nums text-muted-foreground sm:text-xs"
            >
              <span>0</span>
              <span>{formatVolume(maxVolume / 2)}</span>
              <span>{formatVolume(maxVolume)}</span>
            </div>
          ) : null}
          {children}
        </div>
      </div>
    </div>
  );
}

"use client";

import { cn } from "@/lib/utils";
import { useVolumeProfile } from "./context";

export function VolumeProfileSummary({ className }: { className?: string }) {
  const { rows, totalVolume, poc, valueArea, formatPrice, formatVolume, unit, color, pocColor } =
    useVolumeProfile();
  if (!rows.length) return null;
  return (
    <dl
      className={cn(
        "grid grid-cols-2 gap-x-4 gap-y-4 border-t border-border pt-4 text-xs sm:grid-cols-3",
        className,
      )}
    >
      <div className="space-y-1.5">
        <dt className="text-muted-foreground">Total volume</dt>
        <dd className="font-mono font-medium tabular-nums">
          {formatVolume(totalVolume)} {unit}
        </dd>
      </div>
      <div className="space-y-1.5">
        <dt className="flex items-center gap-1.5 text-muted-foreground">
          <span
            aria-hidden="true"
            className="size-1.5 rounded-full"
            style={{ backgroundColor: pocColor }}
          />
          Point of control
        </dt>
        <dd className="font-mono font-medium tabular-nums">{poc ? formatPrice(poc.price) : "—"}</dd>
      </div>
      {valueArea ? (
        <div className="col-span-2 space-y-1.5 sm:col-span-1">
          <dt className="flex items-center gap-1.5 text-muted-foreground">
            <span
              aria-hidden="true"
              className="size-1.5 rounded-full"
              style={{ backgroundColor: color }}
            />
            Value area · {Math.round(valueArea.target * 100)}% target
          </dt>
          <dd className="font-mono font-medium tabular-nums">
            {formatPrice(valueArea.priceLow)} – {formatPrice(valueArea.priceHigh)}
          </dd>
          <dd className="text-muted-foreground">{(valueArea.share * 100).toFixed(1)}% of volume</dd>
        </div>
      ) : null}
    </dl>
  );
}

"use client";

import { MotionConfig } from "motion/react";
import type { ReactNode } from "react";
import { NumberTicker } from "@/components/motion/number-ticker";
import { Tooltip } from "@/components/motion/tooltip";
import { cn } from "@/lib/utils";
import { useVolumeProfile } from "./context";
import type { VolumeProfileRow } from "./model";

const formatShare = (share: number) => `${share.toFixed(1)}%`;

function TooltipNumber({ value, format }: { value: number; format: (value: number) => string }) {
  return (
    // Keep the short digit tween when composed inside spring-based Tabs.
    <MotionConfig transition={{ type: "tween" }}>
      <NumberTicker
        value={value}
        // NumberTicker rounds its formatter argument; use the original value to
        // preserve fractional prices, volumes and shares in every readout.
        format={() => format(value)}
        startOnView={false}
        duration={0.2}
        stagger={0}
        className="font-mono"
      />
    </MotionConfig>
  );
}

export interface VolumeProfileTooltipProps {
  children?: ReactNode | ((row: VolumeProfileRow) => ReactNode);
  className?: string;
  side?: "top" | "right" | "bottom" | "left";
}

export function VolumeProfileTooltip({
  children,
  className,
  side = "top",
}: VolumeProfileTooltipProps) {
  const {
    rows,
    active,
    plotRef,
    tooltipId,
    tooltipOpen,
    setTooltipOpen,
    formatPrice,
    formatVolume,
    unit,
  } = useVolumeProfile();
  // Mount the shared pointer tracker only once the plot's anchor exists,
  // including when an initially empty profile receives its first data.
  if (!rows.length) return null;
  return (
    <Tooltip
      id={tooltipId}
      anchorRef={plotRef}
      followCursor
      anchorPoint={{
        x: active ? Math.max(0.1, active.proportion / 2) : 0.5,
        y: active?.center ?? 0.5,
      }}
      open={tooltipOpen && active !== null}
      onOpenChange={setTooltipOpen}
      side={side}
      className={cn("max-w-64", className)}
      content={
        active
          ? typeof children === "function"
            ? children(active)
            : (children ?? (
                <span className="flex flex-col gap-1.5 text-xs">
                  <span className="inline-flex items-center gap-1 font-medium tabular-nums">
                    <TooltipNumber value={active.priceLow} format={formatPrice} />
                    <span>–</span>
                    <TooltipNumber value={active.priceHigh} format={formatPrice} />
                  </span>
                  <span className="inline-flex flex-wrap items-center gap-1">
                    <TooltipNumber value={active.volume} format={formatVolume} /> {unit}
                    <span className="inline-flex items-center gap-1 text-muted-foreground">
                      <span>·</span>
                      <TooltipNumber value={active.share * 100} format={formatShare} />
                    </span>
                  </span>
                  {active.isPoc || active.inValueArea ? (
                    <span className="text-muted-foreground">
                      {active.isPoc ? "Point of control" : "Inside value area"}
                    </span>
                  ) : null}
                </span>
              ))
          : null
      }
    />
  );
}

"use client";

import { animate, motion, useInView, useReducedMotion } from "motion/react";
import { useEffect, useMemo, useRef, useState } from "react";
import { EASE_OUT } from "@/lib/ease";
import { cn } from "@/lib/utils";

export interface NumberTickerProps {
  value: number;
  /** Digits to pad to (left). */
  pad?: number;
  /** Per-digit roll duration in seconds. */
  duration?: number;
  /** Stagger between digits. */
  stagger?: number;
  /** Render only after the element enters the viewport. */
  startOnView?: boolean;
  prefix?: string;
  suffix?: string;
  /** Add a small blur during digit rolls. */
  blur?: boolean;
  className?: string;
  digitClassName?: string;
  /** Insert locale group separators (commas). Server-component safe. */
  locale?: boolean;
  /** Custom formatter. Client-only — server components must use `locale` instead. */
  format?: (value: number) => string;
}

const DIGIT_HEIGHT_EM = 1.1;
const DIGITS = Array.from({ length: 10 }, (_, n) => n);

export function NumberTicker({
  value,
  pad,
  duration = 0.9,
  stagger = 0.04,
  startOnView = true,
  prefix,
  suffix,
  blur = false,
  className,
  digitClassName,
  locale,
  format,
}: NumberTickerProps) {
  const containerRef = useRef<HTMLSpanElement>(null);
  const inView = useInView(containerRef, { once: true, amount: 0.6 });
  const [armed, setArmed] = useState(!startOnView);

  useEffect(() => {
    if (startOnView && inView) setArmed(true);
  }, [startOnView, inView]);

  const text = useMemo(() => {
    const rounded = Math.round(value);
    const formatted = format
      ? format(rounded)
      : locale
        ? rounded.toLocaleString()
        : rounded.toString();
    return pad ? formatted.padStart(pad, "0") : formatted;
  }, [value, pad, format, locale]);
  const glyphs = useMemo(() => {
    const chars = text.split("");
    // Key by place value (position from the right): a changing digit keeps its
    // identity and rolls to the new value instead of remounting and replaying
    // from 0. Growing numbers add glyphs on the left without re-keying the
    // ones, tens, hundreds already on screen.
    return chars.map((char, i) => ({ char, id: `g-${chars.length - 1 - i}` }));
  }, [text]);
  const readableText = `${prefix ?? ""}${text}${suffix ?? ""}`;

  // Stagger is an entrance flourish. Once the reveal has played, value
  // changes roll every digit immediately — a per-digit delay on live updates
  // reads as lag.
  const [entered, setEntered] = useState(false);
  useEffect(() => {
    if (!armed || entered) return;
    const total = (duration + glyphs.length * stagger) * 1000;
    const t = window.setTimeout(() => setEntered(true), total);
    return () => window.clearTimeout(t);
  }, [armed, entered, duration, stagger, glyphs.length]);

  return (
    <span
      ref={containerRef}
      className={cn("inline-flex items-center tabular-nums", className)}
    >
      <span className="sr-only">{readableText}</span>
      <span aria-hidden="true" className="inline-flex items-center">
        {prefix ? <span>{prefix}</span> : null}
        {glyphs.map(({ char, id }, i) => {
          const isDigit = /\d/.test(char);
          if (!isDigit) {
            return (
              <span key={id} className="inline-block">
                {char}
              </span>
            );
          }
          const digit = Number(char);
          return (
            <Digit
              key={id}
              digit={armed ? digit : 0}
              delay={entered ? 0 : i * stagger}
              duration={duration}
              blur={blur}
              className={digitClassName}
            />
          );
        })}
        {suffix ? <span>{suffix}</span> : null}
      </span>
    </span>
  );
}

function Digit({
  digit,
  delay,
  duration,
  blur,
  className,
}: {
  digit: number;
  delay: number;
  duration: number;
  blur: boolean;
  className?: string;
}) {
  const reduce = useReducedMotion();
  const columnRef = useRef<HTMLSpanElement>(null);

  useEffect(() => {
    if (reduce || !blur || !columnRef.current || !Number.isFinite(digit)) {
      return;
    }

    const node = columnRef.current;
    const controls = animate(
      node,
      { filter: ["blur(10px)", "blur(0px)"] },
      {
        duration: Math.min(duration * 0.75, 0.32),
        delay,
        ease: EASE_OUT,
      },
    );

    return () => {
      controls.stop();
      node.style.filter = "blur(0px)";
    };
  }, [blur, delay, digit, duration, reduce]);

  return (
    <span
      className={cn("relative inline-block overflow-hidden", className)}
      style={{ height: `${DIGIT_HEIGHT_EM}em`, width: "1ch" }}
    >
      <motion.span
        ref={columnRef}
        initial={{ y: 0 }}
        animate={{ y: `-${digit * DIGIT_HEIGHT_EM}em` }}
        transition={
          reduce
            ? { duration: 0 }
            : { duration, delay, ease: EASE_OUT }
        }
        className="absolute inset-x-0 top-0 flex flex-col items-center will-change-[transform,filter]"
      >
        {DIGITS.map((n) => (
          <span
            key={n}
            className="flex h-[1.1em] items-center justify-center leading-none"
          >
            {n}
          </span>
        ))}
      </motion.span>
    </span>
  );
}

"use client";

import { AnimatePresence } from "motion/react";
import { TooltipPositioner } from "./tooltip/positioner";
import { useTooltipPointer } from "./tooltip/use-position";
import {
  cloneElement,
  isValidElement,
  type PointerEvent,
  type ReactElement,
  type ReactNode,
  type RefObject,
  useCallback,
  useEffect,
  useId,
  useRef,
  useState,
} from "react";
import { createPortal } from "react-dom";
import { TooltipSurface } from "@/components/motion/tooltip-surface";
import { useDismiss } from "@/lib/hooks/use-dismiss";
import { useHoverGesture } from "@/lib/hooks/use-hover-gesture";
import { useTapGesture } from "@/lib/hooks/use-tap-gesture";
import { cn } from "@/lib/utils";

type Side = "top" | "right" | "bottom" | "left";

export interface TooltipProps {
  content: ReactNode;
  children?: ReactElement;
  /** Existing trigger for controlled integrations such as chart cells. */
  anchorRef?: RefObject<HTMLElement | SVGElement | null>;
  /** Point within the anchor, as fractions of its rendered width and height. */
  anchorPoint?: { x: number; y: number };
  /** Follow real pointer coordinates; keyboard focus still uses the anchor. */
  followCursor?: boolean;
  open?: boolean;
  onOpenChange?: (open: boolean) => void;
  id?: string;
  side?: Side;
  /** Delay before showing (ms). Default 120. */
  delay?: number;
  className?: string;
  /** Classes for the outer wrapper span. Use to fix baseline / fill parent. */
  wrapperClassName?: string;
}

// Once any tooltip has just closed, neighbouring tooltips open without the
// initial delay — moving along a toolbar feels instant after the first one.
const WARM_WINDOW_MS = 300;
let lastHiddenAt = 0;

export function Tooltip({
  content,
  children,
  side = "top",
  delay = 120,
  className,
  wrapperClassName,
  anchorRef: externalAnchorRef,
  anchorPoint,
  followCursor = false,
  open: controlledOpen,
  onOpenChange,
  id: providedId,
}: TooltipProps) {
  const [internalOpen, setInternalOpen] = useState(false);
  const open = controlledOpen ?? internalOpen;
  const setOpen = useCallback(
    (next: boolean) => {
      if (controlledOpen === undefined) setInternalOpen(next);
      onOpenChange?.(next);
    },
    [controlledOpen, onOpenChange],
  );
  const generatedId = useId();
  const id = providedId ?? generatedId;
  const timer = useRef<ReturnType<typeof setTimeout> | null>(null);
  const wrapperRef = useRef<HTMLSpanElement>(null);
  const anchorRef = externalAnchorRef ?? wrapperRef;
  const hover = useHoverGesture();
  const floatingRef = useRef<HTMLSpanElement | null>(null);
  const pointer = useTooltipPointer(anchorRef, followCursor);
  const focused = useRef(false);

  const show = useCallback(() => {
    if (timer.current) clearTimeout(timer.current);
    if (open) return;
    const warm = Date.now() - lastHiddenAt < WARM_WINDOW_MS;
    if (warm) {
      setOpen(true);
      return;
    }
    timer.current = setTimeout(() => {
      setOpen(true);
    }, delay);
  }, [delay, setOpen, open]);

  const hide = useCallback(() => {
    if (timer.current) {
      clearTimeout(timer.current);
      timer.current = null;
    }
    if (open) lastHiddenAt = Date.now();
    setOpen(false);
  }, [open, setOpen]);

  const leave = useCallback(() => {
    if (focused.current) return;
    if (timer.current) clearTimeout(timer.current);
    // Bridge the small physical gap to a stationary, readable tooltip.
    if (followCursor) hide();
    else timer.current = setTimeout(hide, 100);
  }, [followCursor, hide]);
  const insideTooltip = useCallback(
    (target: Element) => Boolean(floatingRef.current?.contains(target)),
    [],
  );

  // A finger never hovers, and Safari does not focus a button on tap either, so
  // the label is only reachable if the tap itself opens the tooltip. A click
  // carries no pointerType, so the pointerdown that preceded it is what says
  // whether this was a tap; keyboard activation arrives with no pointerdown at
  // all, and focus has already shown the label there.
  const tap = useTapGesture<boolean>();

  const toggleOnTap = useCallback(() => {
    const gesture = tap.take();
    if (!gesture || gesture.pointerType === "mouse") return;
    if (gesture.state) {
      hide();
      return;
    }
    if (timer.current) clearTimeout(timer.current);
    setOpen(true);
  }, [hide, tap, setOpen]);

  // ...and closed again by the next tap that lands somewhere else. The label
  // covers nothing interactive, so that tap passes through to what it hit.
  useDismiss(open, hide, anchorRef, { ignore: insideTooltip });

  useEffect(
    () => () => {
      if (timer.current) clearTimeout(timer.current);
    },
    [],
  );

  if (!externalAnchorRef && !isValidElement(children)) return children;

  // The label describes the trigger, so it has to name the trigger itself.
  // Everything else the tooltip needs is read off the anchor below instead of
  // cloned on: a handler written onto the child is the child's handler as far
  // as that child can tell, and a component that owns its activation —
  // hard-wiring onClick and spreading the rest of its props over it, as
  // ThemeToggle does — then runs the tooltip's instead of its own. Composing
  // with `props.onClick` cannot save it either, because a component element's
  // props hold nothing the component does internally.
  const trigger = isValidElement(children)
    ? cloneElement(children as ReactElement<Record<string, unknown>>, {
        "aria-describedby":
          [(children.props as Record<string, unknown>)["aria-describedby"], open ? id : undefined]
            .filter(Boolean)
            .join(" ") || undefined,
      })
    : null;

  return (
    <>
      {!externalAnchorRef ? (
        // biome-ignore lint/a11y/noStaticElementInteractions: This wrapper observes bubbling trigger events without replacing the control's handlers.
        <span
          ref={wrapperRef}
          className={cn("relative inline-flex align-middle", wrapperClassName)}
          // Pointer events, not the mouse pair: a tap fires compatibility
          // mouseenter/mouseleave that carry no pointerType, which raced the tap
          // path into opening and closing the same label.
          onPointerEnter={(event: PointerEvent) => {
            if (hover.enter(event)) show();
          }}
          onPointerLeave={(event: PointerEvent) => {
            if (hover.leave(event)) leave();
          }}
          onFocus={() => {
            focused.current = true;
            show();
          }}
          onBlur={() => {
            focused.current = false;
            hide();
          }}
          onPointerDown={(event: PointerEvent) => tap.start(event, open)}
          // A gesture the platform took away sends no click, and a key press
          // starts an activation that never had a pointer behind it. Either way
          // the record has to go, or the next click reads a finger that has long
          // since lifted.
          onPointerCancel={tap.drop}
          onKeyDown={(event) => {
            tap.drop();
            if (event.key === "Escape") hide();
          }}
          onClick={toggleOnTap}
        >
          {trigger}
        </span>
      ) : null}
      {typeof document !== "undefined"
        ? createPortal(
            <AnimatePresence>
              {open ? (
                <TooltipPositioner
                  key="tooltip"
                  anchorRef={anchorRef}
                  floatingRef={floatingRef}
                  anchorPoint={anchorPoint}
                  followCursor={followCursor}
                  side={side}
                  onDismiss={hide}
                  pointer={pointer}
                >
                  {(positioned, isPresent) => (
                    <TooltipSurface
                      id={id}
                      ready={positioned}
                      side={side}
                      onPointerEnter={() => {
                        if (timer.current) clearTimeout(timer.current);
                      }}
                      onPointerLeave={leave}
                      style={{
                        maxWidth: "calc(100vw - 16px)",
                        whiteSpace: "normal",
                        pointerEvents: isPresent && !followCursor ? "auto" : "none",
                      }}
                      className={cn("overflow-hidden", className)}
                    >
                      {content}
                    </TooltipSurface>
                  )}
                </TooltipPositioner>
              ) : null}
            </AnimatePresence>,
            document.body,
          )
        : null}
    </>
  );
}