Comparison Table

// 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;

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 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";

/**
 * Grow a small control's *hit area* to at least 44×44px (WCAG 2.5.5, Apple
 * HIG) on a coarse pointer, without changing what it looks like or the space
 * it takes in layout. An invisible `::after` box, centered on the control and
 * `max(100%, 2.75rem)` on each axis, catches the taps: a 32px icon button
 * reaches 6px past each edge, a wide 40px button only grows vertically, and a
 * control already 44px or larger is left as it is. Hit-testing a pseudo
 * element lands on its owner, so handlers, focus and `:active` all behave.
 *
 * Mouse and trackpad rendering is untouched — nothing here applies outside
 * `pointer: coarse`. Requirements on the element it goes on:
 * - It must be the containing block: add `relative` (and keep it mergeable, so
 *   a consumer's `absolute` still wins through `cn`).
 * - It must not clip itself (`overflow-hidden`), or the overhang is clipped
 *   away along with its hit area.
 * - It must render children: `<input>` and other void elements have no
 *   `::after`. Put it on the wrapper or label instead.
 * - It must not already use `::after` for something visible.
 *
 * Centered 44px means two 32px buttons with a 4px gap overlap by 8px; the
 * later one wins that strip, which still ends well short of the earlier
 * button's visual center. Below a ~32px pitch the later neighbour starts
 * eating into that center — use `TOUCH_TARGET_Y_CLASS` for such dense rows.
 *
 * The overhang is real geometry: inside a scroll container it counts as
 * scrollable overflow, so a control flush against a scroller's edge can add a
 * few pixels of scroll on touch screens. Give such a scroller a little padding
 * on that side.
 */
export const TOUCH_TARGET_CLASS =
  "pointer-coarse:after:absolute pointer-coarse:after:top-1/2 pointer-coarse:after:left-1/2 pointer-coarse:after:size-[max(100%,2.75rem)] pointer-coarse:after:-translate-x-1/2 pointer-coarse:after:-translate-y-1/2 pointer-coarse:after:content-['']";

/**
 * `TOUCH_TARGET_CLASS` on the vertical axis only, for controls packed tighter
 * than ~32px apart in a row (pagination dots, dense swatches), where growing
 * sideways would hand most of each control to its neighbour. Same rules.
 */
export const TOUCH_TARGET_Y_CLASS =
  "pointer-coarse:after:absolute pointer-coarse:after:inset-x-0 pointer-coarse:after:top-1/2 pointer-coarse:after:h-[max(100%,2.75rem)] pointer-coarse:after:-translate-y-1/2 pointer-coarse:after:content-['']";

/**
 * 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";
// karaui.kamisama-v0.my.id/components/blocks/comparison-table

import { Check, ChevronDown, Minus } from "lucide-react";
import { AnimatePresence, motion, useReducedMotion } from "motion/react";
import { type CSSProperties, type ReactNode, useCallback, useMemo, useState } from "react";
import { Button } from "@/components/motion/button";
import {
  Collapsible,
  CollapsibleContent,
  CollapsibleTrigger,
  useCollapsible,
} from "@/components/motion/collapsible";
import { NumberTicker } from "@/components/motion/number-ticker";
import { SegmentedControl } from "@/components/motion/segmented-control";
import { EASE_OUT, SPRING_LAYOUT } from "@/lib/ease";
import { cn } from "@/lib/utils";

export type ComparisonBilling = "monthly" | "yearly";

/** true = included, false = not included, "partial" = limited, anything else renders as text. */
export type ComparisonValue = boolean | "partial" | ReactNode;

export interface ComparisonPlan {
  id: string;
  name: string;
  description?: string;
  /** Price per month for each billing period (yearly = monthly equivalent). */
  price: { monthly: number; yearly: number };
  cta?: string;
  /** Highlights the whole column. */
  recommended?: boolean;
}

export interface ComparisonFeature {
  id: string;
  label: ReactNode;
  /** Secondary line under the label. */
  hint?: ReactNode;
  /** Value per plan id. Missing ids read as not included. */
  values: Record<string, ComparisonValue>;
}

export interface ComparisonGroup {
  id: string;
  label: string;
  features: ComparisonFeature[];
}

export interface ComparisonTableProps {
  plans: ComparisonPlan[];
  groups: ComparisonGroup[];
  billing?: ComparisonBilling;
  defaultBilling?: ComparisonBilling;
  onBillingChange?: (billing: ComparisonBilling) => void;
  /** Groups open initially. Default: all. */
  defaultOpenGroups?: string[];
  /** Plan shown in the narrow (single-column) layout. */
  mobilePlan?: string;
  defaultMobilePlan?: string;
  onMobilePlanChange?: (planId: string) => void;
  onSelect?: (plan: ComparisonPlan, billing: ComparisonBilling) => void;
  /** ISO 4217 code. Default "USD". */
  currency?: string;
  /** Default "en-US" so server and client agree. */
  locale?: string;
  /** Badge beside "Yearly". Default "−20%"; null hides it. */
  yearlyBadge?: ReactNode;
  /** Label on the recommended column. Default "Recommended". */
  recommendedLabel?: ReactNode;
  /** Classes for the scrolling body (set a max height here). Default `max-h-[22rem]`. */
  bodyClassName?: string;
  className?: string;
}

function useControllable<T>(
  value: T | undefined,
  defaultValue: T,
  onChange: ((next: T) => void) | undefined,
) {
  const [internal, setInternal] = useState(defaultValue);
  const controlled = value !== undefined;
  const current = controlled ? value : internal;
  const set = useCallback(
    (next: T) => {
      if (!controlled) setInternal(next);
      onChange?.(next);
    },
    [controlled, onChange],
  );
  return [current, set] as const;
}

/**
 * Plan comparison grid: a monthly/yearly switch rolls every price, plan
 * columns sit in a sticky header while feature rows scroll beneath, feature
 * groups collapse with a height morph, cells read check / dash / partial or
 * text, and the recommended plan's column is tinted top to bottom. In a
 * narrow container the columns give way to a plan switcher with one value
 * column that cross-fades between plans. Complements `PricingTable` (cards)
 * as the detailed "compare all features" section.
 */
export function ComparisonTable({
  plans,
  groups,
  billing: billingProp,
  defaultBilling = "monthly",
  onBillingChange,
  defaultOpenGroups,
  mobilePlan: mobilePlanProp,
  defaultMobilePlan,
  onMobilePlanChange,
  onSelect,
  currency = "USD",
  locale = "en-US",
  yearlyBadge = "−20%",
  recommendedLabel = "Recommended",
  bodyClassName,
  className,
}: ComparisonTableProps) {
  const [billing, setBilling] = useControllable(billingProp, defaultBilling, onBillingChange);
  const [mobilePlan, setMobilePlan] = useControllable(
    mobilePlanProp,
    defaultMobilePlan ?? plans.find((p) => p.recommended)?.id ?? plans[0]?.id ?? "",
    onMobilePlanChange,
  );
  const openSet = useMemo(
    () => new Set(defaultOpenGroups ?? groups.map((g) => g.id)),
    [defaultOpenGroups, groups],
  );

  const fractional = plans.some(
    (p) => !Number.isInteger(p.price.monthly) || !Number.isInteger(p.price.yearly),
  );
  const money = useMemo(
    () =>
      new Intl.NumberFormat(locale, {
        style: "currency",
        currency,
        minimumFractionDigits: fractional ? 2 : 0,
        maximumFractionDigits: fractional ? 2 : 0,
      }),
    [locale, currency, fractional],
  );

  const columns: CSSProperties = {
    gridTemplateColumns: `minmax(8.5rem, 1.35fr) repeat(${plans.length}, minmax(0, 1fr))`,
  };
  const current = plans.find((p) => p.id === mobilePlan) ?? plans[0];

  return (
    <div className={cn("@container flex w-full flex-col gap-3", className)}>
      <div className="flex justify-center">
        <SegmentedControl
          aria-label="Billing period"
          size="sm"
          value={billing}
          onValueChange={(v) => setBilling(v as ComparisonBilling)}
          options={[
            { value: "monthly", label: "Monthly" },
            {
              value: "yearly",
              label: (
                <span className="inline-flex items-center gap-1.5">
                  Yearly
                  {yearlyBadge ? (
                    <span className="rounded-full bg-primary/15 px-1.5 py-0.5 text-[10px] font-semibold leading-none">
                      {yearlyBadge}
                    </span>
                  ) : null}
                </span>
              ),
            },
          ]}
        />
      </div>

      <div className="overflow-hidden rounded-2xl border border-border bg-card text-card-foreground">
        {/* Wide layout: all plan columns */}
        <div
          className={cn(
            "hidden overflow-y-auto [scrollbar-color:var(--border-strong)_transparent] [scrollbar-width:thin] @xl:block",
            bodyClassName ?? "max-h-[22rem]",
          )}
        >
          <div className="sticky top-0 z-10 grid border-b border-border bg-card" style={columns}>
            <div className="flex items-end p-3 text-xs text-muted-foreground">Compare plans</div>
            {plans.map((plan) => (
              <div
                key={plan.id}
                className={cn(
                  "relative flex flex-col items-start gap-1 p-3",
                  plan.recommended && "bg-primary/5",
                )}
              >
                {plan.recommended ? (
                  <>
                    <span aria-hidden className="absolute inset-x-0 top-0 h-0.5 bg-primary" />
                    <span className="rounded-full bg-primary px-1.5 py-0.5 text-[10px] font-semibold leading-none text-primary-foreground">
                      {recommendedLabel}
                    </span>
                  </>
                ) : (
                  <span aria-hidden className="h-4" />
                )}
                <span className="text-sm font-semibold">{plan.name}</span>
                <PlanPrice plan={plan} billing={billing} money={money} />
                <Button
                  size="sm"
                  variant={plan.recommended ? "primary" : "secondary"}
                  onClick={() => onSelect?.(plan, billing)}
                  className="mt-1 h-7 w-full px-2"
                >
                  {plan.cta ?? "Choose"}
                </Button>
              </div>
            ))}
          </div>

          {groups.map((group) => (
            <Collapsible key={group.id} defaultOpen={openSet.has(group.id)}>
              <GroupTrigger label={group.label} count={group.features.length} />
              <CollapsibleContent>
                {group.features.map((feature) => (
                  <div
                    key={feature.id}
                    className="grid border-b border-border/60 last:border-b-0"
                    style={columns}
                  >
                    <FeatureLabel feature={feature} />
                    {plans.map((plan) => (
                      <div
                        key={plan.id}
                        className={cn(
                          "flex items-center justify-center px-2 py-2.5",
                          plan.recommended && "bg-primary/5",
                        )}
                      >
                        <Cell value={feature.values[plan.id]} planName={plan.name} />
                      </div>
                    ))}
                  </div>
                ))}
              </CollapsibleContent>
            </Collapsible>
          ))}
        </div>

        {/* Narrow layout: plan switcher + one value column */}
        <div className="@xl:hidden">
          <div className="border-b border-border p-3">
            <SegmentedControl
              aria-label="Plan"
              size="sm"
              fullWidth
              value={current?.id}
              onValueChange={setMobilePlan}
              options={plans.map((p) => ({ value: p.id, label: p.name }))}
            />
            {current ? (
              <div className="mt-3 flex items-center gap-3">
                <div className="min-w-0 flex-1">
                  <p className="flex items-center gap-2 text-sm font-semibold">
                    {current.name}
                    {current.recommended ? (
                      <span className="rounded-full bg-primary px-1.5 py-0.5 text-[10px] font-semibold leading-none text-primary-foreground">
                        {recommendedLabel}
                      </span>
                    ) : null}
                  </p>
                  <PlanPrice plan={current} billing={billing} money={money} />
                </div>
                <Button
                  size="sm"
                  variant={current.recommended ? "primary" : "secondary"}
                  onClick={() => onSelect?.(current, billing)}
                >
                  {current.cta ?? "Choose"}
                </Button>
              </div>
            ) : null}
          </div>
          <div
            className={cn(
              "overflow-y-auto [scrollbar-color:var(--border-strong)_transparent] [scrollbar-width:thin]",
              bodyClassName ?? "max-h-[22rem]",
            )}
          >
            {groups.map((group) => (
              <Collapsible key={group.id} defaultOpen={openSet.has(group.id)}>
                <GroupTrigger label={group.label} count={group.features.length} />
                <CollapsibleContent>
                  {group.features.map((feature) => (
                    <div
                      key={feature.id}
                      className="grid grid-cols-[1fr_6rem] border-b border-border/60 last:border-b-0"
                    >
                      <FeatureLabel feature={feature} />
                      <div
                        className={cn(
                          "flex items-center justify-center px-2 py-2.5",
                          current?.recommended && "bg-primary/5",
                        )}
                      >
                        <AnimatePresence initial={false} mode="popLayout">
                          <motion.span
                            key={current?.id}
                            initial={{ opacity: 0, scale: 0.8 }}
                            animate={{ opacity: 1, scale: 1 }}
                            exit={{ opacity: 0, scale: 0.8 }}
                            transition={{ duration: 0.18, ease: EASE_OUT }}
                            className="flex"
                          >
                            <Cell
                              value={current ? feature.values[current.id] : undefined}
                              planName={current?.name ?? ""}
                            />
                          </motion.span>
                        </AnimatePresence>
                      </div>
                    </div>
                  ))}
                </CollapsibleContent>
              </Collapsible>
            ))}
          </div>
        </div>
      </div>
    </div>
  );
}

function PlanPrice({
  plan,
  billing,
  money,
}: {
  plan: ComparisonPlan;
  billing: ComparisonBilling;
  money: Intl.NumberFormat;
}) {
  const amount = plan.price[billing];
  const free = plan.price.monthly === 0 && plan.price.yearly === 0;
  return (
    <span className="flex items-baseline gap-0.5">
      <NumberTicker
        value={Math.round(amount * 100)}
        format={(cents) => money.format(cents / 100)}
        duration={0.6}
        stagger={0.03}
        startOnView={false}
        className="text-lg font-semibold tracking-tight"
      />
      {free ? null : <span className="text-[11px] text-muted-foreground">/mo</span>}
    </span>
  );
}

function GroupTrigger({ label, count }: { label: string; count: number }) {
  const { open } = useCollapsible("GroupTrigger");
  const reduce = useReducedMotion();
  return (
    <CollapsibleTrigger className="flex w-full items-center gap-2 border-b border-border bg-muted/50 px-3 py-2 text-left text-xs font-semibold outline-none transition-colors hover:bg-muted focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-primary">
      <motion.span
        animate={{ rotate: open ? 0 : -90 }}
        transition={reduce ? { duration: 0 } : SPRING_LAYOUT}
        className="grid place-items-center text-muted-foreground"
      >
        <ChevronDown aria-hidden className="size-3.5" />
      </motion.span>
      <span className="flex-1">{label}</span>
      <span className="text-[10px] font-normal tabular-nums text-muted-foreground">
        {count} {count === 1 ? "feature" : "features"}
      </span>
    </CollapsibleTrigger>
  );
}

function FeatureLabel({ feature }: { feature: ComparisonFeature }) {
  return (
    <div className="min-w-0 px-3 py-2.5">
      <p className="text-xs font-medium">{feature.label}</p>
      {feature.hint ? <p className="mt-0.5 text-[11px] text-muted-foreground">{feature.hint}</p> : null}
    </div>
  );
}

function Cell({ value, planName }: { value: ComparisonValue | undefined; planName: string }) {
  if (value === true) {
    return (
      <span className="grid size-5 place-items-center rounded-full bg-primary/15 text-primary">
        <Check aria-hidden className="size-3" strokeWidth={3} />
        <span className="sr-only">{planName}: included</span>
      </span>
    );
  }
  if (value === false || value === undefined || value === null) {
    return (
      <span className="grid size-5 place-items-center text-muted-foreground/60">
        <Minus aria-hidden className="size-3.5" />
        <span className="sr-only">{planName}: not included</span>
      </span>
    );
  }
  if (value === "partial") {
    return (
      <span className="grid size-5 place-items-center">
        <span
          aria-hidden
          className="size-3 rounded-full border-2 border-primary bg-[linear-gradient(90deg,var(--primary)_50%,transparent_50%)]"
        />
        <span className="sr-only">{planName}: partial</span>
      </span>
    );
  }
  return (
    <span className="text-center text-xs text-foreground">
      <span className="sr-only">{planName}: </span>
      {value}
    </span>
  );
}

export type {
  ButtonLinkProps,
  ButtonProps,
  ButtonSize,
  ButtonVariant,
} from "./base";
export { Button, ButtonLink } from "./base";
export type { MagneticButtonProps } from "./magnetic";
export { MagneticButton } from "./magnetic";
export type { ButtonState, StatefulButtonProps } from "./stateful";
export { StatefulButton } from "./stateful";

"use client";

import { motion, useReducedMotion, type Transition } from "motion/react";
import {
  cloneElement,
  createContext,
  forwardRef,
  isValidElement,
  useCallback,
  useContext,
  useId,
  useState,
  type ButtonHTMLAttributes,
  type HTMLAttributes,
  type MouseEvent,
  type ReactElement,
  type ReactNode,
} from "react";
import { EASE_OUT } from "@/lib/ease";
import { cn } from "@/lib/utils";

// Collapsible is the unstyled disclosure primitive: one trigger, one panel.
// `Accordion` (accordion.tsx) is built from it; `BouncyAccordion` is the
// springy, single-open icon-row variant. Reach for this when a single region
// should show or hide in flow ("Show 3 more", an expandable activity row).

/** Entrance is a touch longer than the exit — exits should feel faster. */
const OPEN_TRANSITION: Transition = { duration: 0.28, ease: EASE_OUT };
const CLOSE_TRANSITION: Transition = { duration: 0.2, ease: EASE_OUT };

interface CollapsibleContextValue {
  open: boolean;
  setOpen: (open: boolean) => void;
  disabled: boolean;
  triggerId: string;
  contentId: string;
}

const CollapsibleContext = createContext<CollapsibleContextValue | null>(null);

export function useCollapsible(component = "useCollapsible") {
  const context = useContext(CollapsibleContext);
  if (!context) {
    throw new Error(`${component} must be used within <Collapsible>.`);
  }
  return context;
}

export interface CollapsibleProps
  extends Omit<HTMLAttributes<HTMLDivElement>, "onChange"> {
  /** Controlled open state. */
  open?: boolean;
  /** Initial open state when uncontrolled. */
  defaultOpen?: boolean;
  onOpenChange?: (open: boolean) => void;
  disabled?: boolean;
  /** Override the generated trigger id (the content is labelled by it). */
  triggerId?: string;
  /** Override the generated content id (the trigger controls it). */
  contentId?: string;
  children?: ReactNode;
}

export const Collapsible = forwardRef<HTMLDivElement, CollapsibleProps>(
  function Collapsible(
    {
      open: openProp,
      defaultOpen = false,
      onOpenChange,
      disabled = false,
      triggerId: triggerIdProp,
      contentId: contentIdProp,
      className,
      children,
      ...rest
    },
    ref,
  ) {
    const [internal, setInternal] = useState(defaultOpen);
    const controlled = openProp !== undefined;
    const open = controlled ? openProp : internal;
    const setOpen = useCallback(
      (next: boolean) => {
        if (!controlled) setInternal(next);
        onOpenChange?.(next);
      },
      [controlled, onOpenChange],
    );
    const baseId = useId();
    const triggerId = triggerIdProp ?? `${baseId}-trigger`;
    const contentId = contentIdProp ?? `${baseId}-content`;

    return (
      <CollapsibleContext.Provider
        value={{ open, setOpen, disabled, triggerId, contentId }}
      >
        <div
          ref={ref}
          data-state={open ? "open" : "closed"}
          data-disabled={disabled ? "" : undefined}
          className={cn(className)}
          {...rest}
        >
          {children}
        </div>
      </CollapsibleContext.Provider>
    );
  },
);

type ClonableChild = ReactElement<{
  onClick?: (event: MouseEvent<HTMLElement>) => void;
  [key: string]: unknown;
}>;

export interface CollapsibleTriggerProps
  extends ButtonHTMLAttributes<HTMLButtonElement> {
  /** Merge trigger behaviour onto the single child element instead of rendering a `<button>`. */
  asChild?: boolean;
}

/** Toggles the nearest `Collapsible`. Unstyled `<button>` by default. */
export const CollapsibleTrigger = forwardRef<
  HTMLButtonElement,
  CollapsibleTriggerProps
>(function CollapsibleTrigger(
  { asChild, children, onClick, className, disabled: disabledProp, ...rest },
  ref,
) {
  const context = useCollapsible("CollapsibleTrigger");
  const disabled = context.disabled || Boolean(disabledProp);
  const shared = {
    id: context.triggerId,
    "aria-expanded": context.open,
    "aria-controls": context.contentId,
    "data-state": context.open ? "open" : "closed",
    "data-disabled": disabled ? "" : undefined,
  };

  if (asChild && isValidElement(children)) {
    const child = children as ClonableChild;
    return cloneElement(child, {
      ...shared,
      onClick: (event: MouseEvent<HTMLElement>) => {
        child.props.onClick?.(event);
        if (!event.defaultPrevented && !disabled) context.setOpen(!context.open);
      },
    });
  }

  return (
    <button
      ref={ref}
      type="button"
      disabled={disabled}
      className={cn(className)}
      {...rest}
      {...shared}
      onClick={(event) => {
        onClick?.(event);
        if (!event.defaultPrevented) context.setOpen(!context.open);
      }}
    >
      {children}
    </button>
  );
});

export interface CollapsibleContentProps extends HTMLAttributes<HTMLDivElement> {
  /** Class for the inner wrapper that holds the children (padding goes here,
   * never on the animated outer element, so the closed height is truly 0). */
  innerClassName?: string;
  /** Set to give the panel `role="region"` labelled by its trigger. */
  region?: boolean;
  children?: ReactNode;
}

/** The disclosed panel. Stays mounted (inert while closed) so `aria-controls` always resolves. */
export function CollapsibleContent({
  className,
  innerClassName,
  region = false,
  children,
  style,
  ...rest
}: CollapsibleContentProps) {
  const { open, triggerId, contentId } = useCollapsible("CollapsibleContent");
  const reduce = useReducedMotion();
  const fade = open ? OPEN_TRANSITION : CLOSE_TRANSITION;

  return (
    // Height is animated on purpose: disclosure is a layout job — the panel
    // has to push the content below it down in flow, which transforms can't.
    // Reduced motion snaps the height and keeps only the opacity fade.
    <motion.div
      {...(rest as Record<string, unknown>)}
      id={contentId}
      role={region ? "region" : undefined}
      aria-labelledby={region ? triggerId : undefined}
      data-state={open ? "open" : "closed"}
      inert={!open}
      initial={false}
      animate={{ height: open ? "auto" : 0, opacity: open ? 1 : 0 }}
      transition={
        reduce ? { height: { duration: 0 }, opacity: { duration: 0.15 } } : fade
      }
      style={style}
      className={cn("overflow-hidden", className)}
    >
      <div className={innerClassName}>{children}</div>
    </motion.div>
  );
}

"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 en-US group separators (commas); fixed so server and client match. 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("en-US")
        : 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, motion, useReducedMotion } from "motion/react";
import {
  useCallback,
  useId,
  useRef,
  useState,
  type KeyboardEvent,
  type ReactNode,
} from "react";
import { SPRING_LAYOUT, SPRING_PRESS, SPRING_SWAP } from "@/lib/ease";
import { cn } from "@/lib/utils";

// SegmentedControl vs Tabs: `Tabs` (tabs.tsx, variants pill/segment/underline)
// switches *panels* with tablist/tab semantics. `SegmentedControl` is a form
// control: it picks one *value* with radiogroup/radio semantics, can post that
// value with a form via `name`, supports disabled options, icon-only options
// and a full-width layout, and its thumb is a raised card surface rather than
// a filled accent pill. Reach for Tabs when each option owns content below it.

export type SegmentedControlSize = "sm" | "md" | "lg";

export interface SegmentedControlOption {
  value: string;
  label?: ReactNode;
  icon?: ReactNode;
  disabled?: boolean;
  /** Required when the option has only an icon. */
  "aria-label"?: string;
}

const trackSize: Record<SegmentedControlSize, string> = {
  sm: "h-8 p-0.5 text-xs",
  md: "h-10 p-1 text-sm",
  lg: "h-12 p-1 text-sm",
};

const itemSize: Record<SegmentedControlSize, string> = {
  sm: "gap-1.5 px-2.5 [&_svg]:size-3.5",
  md: "gap-2 px-3.5 [&_svg]:size-4",
  lg: "gap-2 px-5 [&_svg]:size-[18px]",
};

function useControllable<T>(
  value: T | undefined,
  defaultValue: T,
  onChange: ((next: T) => void) | undefined,
) {
  const [internal, setInternal] = useState<T>(defaultValue);
  const controlled = value !== undefined;
  const current = controlled ? value : internal;
  const set = useCallback(
    (next: T) => {
      if (!controlled) setInternal(next);
      onChange?.(next);
    },
    [controlled, onChange],
  );
  return [current, set] as const;
}

/** Index of the next enabled option from `from` in `dir`, wrapping around. */
function nextEnabled(options: { disabled?: boolean }[], from: number, dir: 1 | -1) {
  const n = options.length;
  for (let step = 1; step <= n; step++) {
    const i = (((from + dir * step) % n) + n) % n;
    if (!options[i].disabled) return i;
  }
  return from;
}

export interface SegmentedControlProps {
  options: SegmentedControlOption[];
  value?: string;
  defaultValue?: string;
  onValueChange?: (value: string) => void;
  size?: SegmentedControlSize;
  /** Stretch to the container width with equal-width segments. */
  fullWidth?: boolean;
  disabled?: boolean;
  /** When set, a hidden input posts the value with the surrounding form. */
  name?: string;
  "aria-label"?: string;
  "aria-labelledby"?: string;
  className?: string;
  thumbClassName?: string;
}

export function SegmentedControl({
  options,
  value,
  defaultValue,
  onValueChange,
  size = "md",
  fullWidth = false,
  disabled = false,
  name,
  className,
  thumbClassName,
  ...aria
}: SegmentedControlProps) {
  const [current, setValue] = useControllable(
    value,
    defaultValue ?? options.find((o) => !o.disabled)?.value ?? "",
    onValueChange,
  );
  const reduce = useReducedMotion();
  const layoutId = useId();
  const refs = useRef<(HTMLButtonElement | null)[]>([]);
  const items = options.map((o) => ({ ...o, disabled: disabled || o.disabled }));
  const selectedIndex = items.findIndex((o) => o.value === current);
  // Roving tab stop: the checked radio, or the first enabled one when none is.
  const tabStop = selectedIndex >= 0 && !items[selectedIndex].disabled
    ? selectedIndex
    : items.findIndex((o) => !o.disabled);

  const onKeyDown = (event: KeyboardEvent<HTMLButtonElement>, index: number) => {
    let next: number | null = null;
    switch (event.key) {
      case "ArrowRight":
      case "ArrowDown":
        next = nextEnabled(items, index, 1);
        break;
      case "ArrowLeft":
      case "ArrowUp":
        next = nextEnabled(items, index, -1);
        break;
      case "Home":
        next = nextEnabled(items, -1, 1);
        break;
      case "End":
        next = nextEnabled(items, items.length, -1);
        break;
      default:
        return;
    }
    event.preventDefault();
    if (next === null || items[next].disabled) return;
    // Selection follows focus, as the WAI-ARIA radio group pattern prescribes.
    refs.current[next]?.focus();
    if (items[next].value !== current) setValue(items[next].value);
  };

  return (
    // layoutRoot keeps the thumb's shared-layout projection local, so scrolled
    // or fixed ancestors never leak offsets into its glide.
    <motion.div
      layoutRoot
      role="radiogroup"
      aria-disabled={disabled || undefined}
      {...aria}
      className={cn(
        "relative isolate items-stretch rounded-xl border border-border bg-muted",
        fullWidth ? "flex w-full" : "inline-flex",
        trackSize[size],
        disabled && "opacity-60",
        className,
      )}
    >
      {name ? <input type="hidden" name={name} value={current} /> : null}
      {items.map((option, index) => {
        const checked = option.value === current;
        const iconOnly = !option.label;
        return (
          <motion.button
            key={option.value}
            ref={(el) => {
              refs.current[index] = el;
            }}
            type="button"
            role="radio"
            aria-checked={checked}
            aria-label={option["aria-label"]}
            disabled={option.disabled}
            tabIndex={index === tabStop ? 0 : -1}
            data-state={checked ? "checked" : "unchecked"}
            onClick={() => !checked && setValue(option.value)}
            onKeyDown={(e) => onKeyDown(e, index)}
            whileTap={reduce || option.disabled ? undefined : { scale: 0.96 }}
            transition={SPRING_PRESS}
            className={cn(
              "relative inline-flex min-w-0 select-none items-center justify-center whitespace-nowrap rounded-[9px] font-medium outline-none transition-colors duration-200",
              "focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-1 focus-visible:ring-offset-muted",
              "disabled:cursor-not-allowed disabled:opacity-50",
              fullWidth && "flex-1",
              itemSize[size],
              iconOnly && "aspect-square px-0",
              checked
                ? "text-foreground"
                : "text-muted-foreground enabled:hover:text-foreground",
            )}
          >
            {checked ? (
              <motion.span
                layoutId={layoutId}
                aria-hidden
                transition={reduce ? { duration: 0 } : SPRING_LAYOUT}
                className={cn(
                  "absolute inset-0 -z-10 rounded-[9px] border border-border bg-card shadow-sm",
                  thumbClassName,
                )}
              />
            ) : null}
            {option.icon ? (
              <span aria-hidden className="inline-flex shrink-0">
                {option.icon}
              </span>
            ) : null}
            {option.label ? <span className="truncate">{option.label}</span> : null}
          </motion.button>
        );
      })}
    </motion.div>
  );
}

/* ------------------------------------------------------------------------ */
/* ToggleGroup                                                               */
/* ------------------------------------------------------------------------ */

export interface ToggleGroupItem {
  value: string;
  label?: ReactNode;
  icon?: ReactNode;
  disabled?: boolean;
  /** Required when the item has only an icon. */
  "aria-label"?: string;
}

type ToggleGroupBase = {
  items: ToggleGroupItem[];
  size?: SegmentedControlSize;
  disabled?: boolean;
  "aria-label"?: string;
  "aria-labelledby"?: string;
  className?: string;
};

export type ToggleGroupSingleProps = ToggleGroupBase & {
  type: "single";
  /** The pressed item, or `""` when none is pressed. */
  value?: string;
  defaultValue?: string;
  onValueChange?: (value: string) => void;
  /** Disallow un-pressing the active item, so one is always pressed. */
  required?: boolean;
};

export type ToggleGroupMultipleProps = ToggleGroupBase & {
  type: "multiple";
  value?: string[];
  defaultValue?: string[];
  onValueChange?: (value: string[]) => void;
};

export type ToggleGroupProps = ToggleGroupSingleProps | ToggleGroupMultipleProps;

const toggleSize: Record<SegmentedControlSize, string> = {
  sm: "h-7 min-w-7 gap-1.5 px-2 text-xs [&_svg]:size-3.5",
  md: "h-9 min-w-9 gap-2 px-2.5 text-sm [&_svg]:size-4",
  lg: "h-11 min-w-11 gap-2 px-3.5 text-sm [&_svg]:size-[18px]",
};

export function ToggleGroup(props: ToggleGroupProps) {
  const { items, size = "md", disabled = false, className } = props;
  const reduce = useReducedMotion();
  const refs = useRef<(HTMLButtonElement | null)[]>([]);
  const [focusIndex, setFocusIndex] = useState<number | null>(null);

  // Normalise both modes to a string[] internally.
  const single = props.type === "single";
  const [current, setCurrent] = useControllable<string[]>(
    props.value === undefined ? undefined : single ? (props.value ? [props.value as string] : []) : (props.value as string[]),
    single
      ? props.defaultValue
        ? [props.defaultValue as string]
        : []
      : ((props.defaultValue as string[] | undefined) ?? []),
    (next) => {
      if (props.type === "single") props.onValueChange?.(next[0] ?? "");
      else props.onValueChange?.(next);
    },
  );

  const list = items.map((i) => ({ ...i, disabled: disabled || i.disabled }));
  const firstEnabled = list.findIndex((i) => !i.disabled);
  const tabStop =
    focusIndex !== null && !list[focusIndex]?.disabled ? focusIndex : firstEnabled;

  const toggle = (itemValue: string) => {
    const pressed = current.includes(itemValue);
    if (props.type === "single") {
      if (pressed && props.required) return;
      setCurrent(pressed ? [] : [itemValue]);
    } else {
      setCurrent(pressed ? current.filter((v) => v !== itemValue) : [...current, itemValue]);
    }
  };

  const onKeyDown = (event: KeyboardEvent<HTMLButtonElement>, index: number) => {
    let next: number | null = null;
    if (event.key === "ArrowRight" || event.key === "ArrowDown") next = nextEnabled(list, index, 1);
    else if (event.key === "ArrowLeft" || event.key === "ArrowUp") next = nextEnabled(list, index, -1);
    else if (event.key === "Home") next = nextEnabled(list, -1, 1);
    else if (event.key === "End") next = nextEnabled(list, list.length, -1);
    if (next === null) return;
    event.preventDefault();
    // Focus moves; pressing stays on Space/Enter (toggle buttons, not radios).
    setFocusIndex(next);
    refs.current[next]?.focus();
  };

  return (
    <motion.div
      role="group"
      aria-label={props["aria-label"]}
      aria-labelledby={props["aria-labelledby"]}
      className={cn(
        "inline-flex items-center gap-0.5 rounded-xl border border-border bg-card p-1",
        disabled && "opacity-60",
        className,
      )}
    >
      {list.map((item, index) => {
        const pressed = current.includes(item.value);
        return (
          <motion.button
            key={item.value}
            ref={(el) => {
              refs.current[index] = el;
            }}
            type="button"
            aria-pressed={pressed}
            aria-label={item["aria-label"]}
            disabled={item.disabled}
            tabIndex={index === tabStop ? 0 : -1}
            data-state={pressed ? "on" : "off"}
            onClick={() => {
              setFocusIndex(index);
              toggle(item.value);
            }}
            onFocus={() => setFocusIndex(index)}
            onKeyDown={(e) => onKeyDown(e, index)}
            whileTap={reduce || item.disabled ? undefined : { scale: 0.88 }}
            transition={SPRING_PRESS}
            className={cn(
              "relative isolate inline-flex select-none items-center justify-center rounded-lg font-medium outline-none transition-colors duration-200",
              "focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-1 focus-visible:ring-offset-card",
              "disabled:cursor-not-allowed disabled:opacity-50",
              toggleSize[size],
              pressed
                ? "text-foreground"
                : "text-muted-foreground enabled:hover:bg-muted/60 enabled:hover:text-foreground",
            )}
          >
            <AnimatePresence initial={false}>
              {pressed ? (
                <motion.span
                  key="on"
                  aria-hidden
                  initial={reduce ? { opacity: 0 } : { opacity: 0, scale: 0.6 }}
                  animate={{ opacity: 1, scale: 1 }}
                  exit={reduce ? { opacity: 0 } : { opacity: 0, scale: 0.75, transition: { duration: 0.12 } }}
                  transition={SPRING_SWAP}
                  className="absolute inset-0 -z-10 rounded-lg bg-muted ring-1 ring-border-strong"
                />
              ) : null}
            </AnimatePresence>
            {item.icon ? (
              <span aria-hidden className="inline-flex shrink-0">
                {item.icon}
              </span>
            ) : null}
            {item.label ? <span>{item.label}</span> : null}
          </motion.button>
        );
      })}
    </motion.div>
  );
}

"use client";

import {
  AnimatePresence,
  type HTMLMotionProps,
  motion,
  useReducedMotion,
} from "motion/react";
import {
  forwardRef,
  type PointerEvent,
  type ReactNode,
  useCallback,
  useRef,
  useState,
} from "react";
import { EASE_OUT, SPRING_PRESS } from "@/lib/ease";
import { useHoverCapable } from "@/lib/hooks/use-hover-capable";
import { TOUCH_TARGET_CLASS } from "@/lib/touch";
import { cn } from "@/lib/utils";

export type ButtonVariant = "primary" | "secondary" | "ghost" | "outline";
export type ButtonSize = "sm" | "md" | "lg" | "icon";

export interface ButtonProps extends Omit<
  HTMLMotionProps<"button">,
  "children"
> {
  variant?: ButtonVariant;
  size?: ButtonSize;
  pressScale?: number;
  /** Spawn a Material-style ripple from the press point. Off by default. */
  ripple?: boolean;
  children?: ReactNode;
}

export interface ButtonLinkProps extends Omit<
  HTMLMotionProps<"a">,
  "children"
> {
  variant?: ButtonVariant;
  size?: ButtonSize;
  pressScale?: number;
  children?: ReactNode;
}

type Ripple = { id: number; x: number; y: number; size: number };

const VARIANT_CLASS: Record<ButtonVariant, string> = {
  primary: "bg-primary text-primary-foreground hover:bg-primary/90",
  secondary: "border border-border bg-card text-foreground hover:border-border",
  ghost: "text-muted-foreground hover:text-foreground hover:bg-primary/5",
  outline:
    "border border-border bg-transparent text-foreground hover:bg-primary/5",
};

const SIZE_CLASS: Record<ButtonSize, string> = {
  sm: "h-8 px-3 text-xs gap-1.5 rounded-full",
  md: "h-10 px-5 text-sm gap-2 rounded-full",
  lg: "h-12 px-6 text-base gap-2 rounded-full",
  icon: "h-8 w-8 rounded-lg",
};

export const Button = forwardRef<HTMLButtonElement, ButtonProps>(
  function Button(
    {
      variant = "primary",
      size = "md",
      pressScale = 0.93,
      ripple = false,
      className,
      children,
      onPointerDown,
      ...rest
    },
    ref,
  ) {
    const reduce = useReducedMotion();
    const canHover = useHoverCapable();
    const [ripples, setRipples] = useState<Ripple[]>([]);
    const nextId = useRef(0);

    const handlePointerDown = useCallback(
      (event: PointerEvent<HTMLButtonElement>) => {
        if (ripple && !reduce) {
          const rect = event.currentTarget.getBoundingClientRect();
          const size = Math.max(rect.width, rect.height) * 2;
          const id = nextId.current++;
          setRipples((prev) => [
            ...prev,
            {
              id,
              x: event.clientX - rect.left,
              y: event.clientY - rect.top,
              size,
            },
          ]);
        }
        onPointerDown?.(event);
      },
      [ripple, reduce, onPointerDown],
    );

    return (
      <motion.button
        ref={ref}
        type="button"
        whileTap={reduce ? undefined : { scale: pressScale }}
        whileHover={reduce || !canHover ? undefined : { scale: 1.02 }}
        transition={SPRING_PRESS}
        onPointerDown={handlePointerDown}
        className={cn(
          "relative inline-flex items-center justify-center font-medium select-none",
          "transition-colors",
          "disabled:pointer-events-none disabled:opacity-50",
          // The ripple layer clips itself, so on a touch screen the button can
          // stop clipping and let its enlarged hit area overhang.
          ripple && "overflow-hidden pointer-coarse:overflow-visible",
          TOUCH_TARGET_CLASS,
          VARIANT_CLASS[variant],
          SIZE_CLASS[size],
          className,
        )}
        {...rest}
      >
        {ripple && !reduce ? (
          <span className="pointer-events-none absolute inset-0 overflow-hidden rounded-[inherit]">
            <AnimatePresence>
              {ripples.map((r) => (
                <motion.span
                  key={r.id}
                  className="absolute rounded-full bg-current"
                  style={{
                    left: r.x,
                    top: r.y,
                    width: r.size,
                    height: r.size,
                    x: "-50%",
                    y: "-50%",
                  }}
                  initial={{ scale: 0.05, opacity: 0.3 }}
                  animate={{ scale: 1, opacity: 0 }}
                  exit={{ opacity: 0 }}
                  transition={{ duration: 1.6, ease: EASE_OUT }}
                  onAnimationComplete={() =>
                    setRipples((prev) => prev.filter((x) => x.id !== r.id))
                  }
                />
              ))}
            </AnimatePresence>
          </span>
        ) : null}
        {children}
      </motion.button>
    );
  },
);

export const ButtonLink = forwardRef<HTMLAnchorElement, ButtonLinkProps>(
  function ButtonLink(
    {
      variant = "primary",
      size = "md",
      pressScale = 0.93,
      className,
      children,
      ...rest
    },
    ref,
  ) {
    const reduce = useReducedMotion();
    const canHover = useHoverCapable();

    return (
      <motion.a
        ref={ref}
        whileTap={reduce ? undefined : { scale: pressScale }}
        whileHover={reduce || !canHover ? undefined : { scale: 1.02 }}
        transition={SPRING_PRESS}
        className={cn(
          "relative inline-flex items-center justify-center font-medium select-none",
          "transition-colors",
          TOUCH_TARGET_CLASS,
          VARIANT_CLASS[variant],
          SIZE_CLASS[size],
          className,
        )}
        {...rest}
      >
        {children}
      </motion.a>
    );
  },
);