Interfaces,
reduced.

"use client"

import * as React from "react"
import { Button } from "@/components/ui/button"
import { cn } from "@/lib/utils"

const styles = `
.wlkr-copy-icon{width:16px;height:16px;overflow:visible}
.wlkr-copy-icon g{transform-origin:12px 12px;transition:opacity 180ms ease,transform 180ms ease}
.wlkr-copy-icon g[data-visible=false]{opacity:0;transform:scale(.65) rotate(-12deg)}
.wlkr-copy-icon g[data-visible=true]{opacity:1;transform:scale(1) rotate(0)}
.wlkr-copy-success{color:var(--success,#087d3d)}
.dark .wlkr-copy-success{color:var(--success,#33f282)}
.wlkr-copy-error{color:var(--destructive,#b42318)}
@media(prefers-reduced-motion:reduce){.wlkr-copy-icon g{transition:none}}
`

/** A fixed-slot copy control. Feedback is visual in the icon and announced off-screen. */
export function CopyCommand({ command, className }: { command: string; className?: string }) {
  const [state, setState] = React.useState<"idle" | "copying" | "copied" | "error">("idle")
  const timer = React.useRef<ReturnType<typeof setTimeout> | null>(null)
  const mounted = React.useRef(true)
  const locked = React.useRef(false)
  React.useEffect(() => { mounted.current = true; return () => { mounted.current = false; if (timer.current) clearTimeout(timer.current) } }, [])
  async function copy() {
    if (locked.current) return
    locked.current = true
    if (timer.current) clearTimeout(timer.current)
    setState("copying")
    try {
      await navigator.clipboard.writeText(command)
      if (mounted.current) {
        setState("copied")
        timer.current = setTimeout(() => setState("idle"), 2200)
      }
    } catch { if (mounted.current) setState("error") }
    finally { locked.current = false }
  }
  return (
    <div className={cn("relative flex min-w-0 items-center gap-4", className)}>
      <style>{styles}</style>
      <code className="min-w-0 flex-1 overflow-x-auto py-3 text-sm whitespace-pre">{command}</code>
      <Button type="button" variant="ghost" size="icon" onClick={copy} disabled={state === "copying"} style={{ width: 44, height: 44, flexShrink: 0, padding: 0 }} aria-label={state === "copied" ? "Command copied; copy again" : state === "error" ? "Copy failed; try again" : "Copy command"}>
        <svg className="wlkr-copy-icon" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.75" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <g data-visible={state === "idle" || state === "copying"}><rect x="8" y="8" width="12" height="12" rx="2" /><path d="M16 8V5a2 2 0 0 0-2-2H5a2 2 0 0 0-2 2v9a2 2 0 0 0 2 2h3" /></g>
          <g data-visible={state === "copied"} className="wlkr-copy-success"><path d="m5 12 4 4L19 6" /></g>
          <g data-visible={state === "error"} className="wlkr-copy-error"><path d="m6 6 12 12M18 6 6 18" /></g>
        </svg>
      </Button>
      <span role="status" className="sr-only">{state === "error" ? "Clipboard unavailable. Select and copy the command, or try again." : state === "copied" ? "Copied to clipboard." : ""}</span>
    </div>
  )
}

"use client"

import * as React from "react"
import { ArrowUpRight, Check, X } from "lucide-react"
import { Button } from "@/components/ui/button"

const styles = `
.wlkr-action{display:inline-grid!important;grid-template-areas:'state';height:44px;min-height:44px;max-width:100%;padding:0 12px!important}
.wlkr-action-state{grid-area:state;display:inline-flex;align-items:center;justify-content:flex-start;gap:10px;min-height:24px;white-space:normal;text-align:left}
.wlkr-action-state[aria-hidden=true]{visibility:hidden;pointer-events:none}
.wlkr-action-state svg{width:16px;height:16px;flex-shrink:0}
.wlkr-action-success{color:var(--success,#087d3d)}
.dark .wlkr-action-success{color:var(--success,#33f282)}
.wlkr-action-error{color:var(--destructive,#b42318)}
.wlkr-action[aria-busy=true]{opacity:1!important}
.wlkr-action-pending-label{position:relative;display:inline-block}
.wlkr-action-pending-base{opacity:.72}
.wlkr-action-pending-pixels{position:absolute;inset:0;pointer-events:none;mask-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Crect width='3' height='3' fill='white'/%3E%3Crect x='4' y='4' width='3' height='3' fill='white'/%3E%3C/svg%3E");mask-size:8px 8px;mask-repeat:repeat}
@keyframes wlkr-action-reconstruct{0%,100%{mask-position:0 0;opacity:.35}50%{mask-position:4px 4px;opacity:1}}
@media(prefers-reduced-motion:no-preference){.wlkr-action-pending-pixels{animation:wlkr-action-reconstruct 2800ms ease-in-out infinite}}
@media(prefers-reduced-motion:reduce){.wlkr-action-pending-base{opacity:1}.wlkr-action-pending-pixels{display:none}}

`

/** One promise at a time. All labels share a reserved slot, so feedback never moves the page. */
export function AsyncAction({ action, children, pendingLabel = "Saving…", successLabel = "Saved", errorLabel = "Could not save. Try again.", failureLabel = "Try again", disabled = false }: {
  action: () => Promise<unknown>
  children: React.ReactNode
  pendingLabel?: string
  successLabel?: string
  errorLabel?: string
  failureLabel?: string
  disabled?: boolean
}) {
  const [state, setState] = React.useState<"idle" | "pending" | "success" | "error">("idle")
  const locked = React.useRef(false)
  const mounted = React.useRef(true)
  React.useEffect(() => { mounted.current = true; return () => { mounted.current = false } }, [])
  async function run() {
    if (locked.current) return
    locked.current = true
    setState("pending")
    try { await action(); if (mounted.current) setState("success") }
    catch { if (mounted.current) setState("error") }
    finally { locked.current = false }
  }
  return (
    <span className="relative inline-flex max-w-full align-middle">
      <style>{styles}</style>
      <Button className="wlkr-action" type="button" variant="ghost" onClick={run} disabled={disabled || state === "pending"} aria-busy={state === "pending"}>
        <span className="wlkr-action-state" aria-hidden={state !== "idle"}><ArrowUpRight aria-hidden="true" />{children}</span>
        <span className="wlkr-action-state" aria-hidden={state !== "pending"}><ArrowUpRight aria-hidden="true" style={{visibility:"hidden"}} /><span className="wlkr-action-pending-label"><span className="wlkr-action-pending-base">{pendingLabel}</span><span className="wlkr-action-pending-pixels" aria-hidden="true">{pendingLabel}</span></span></span>
        <span className="wlkr-action-state" aria-hidden={state !== "success"}><Check className="wlkr-action-success" aria-hidden="true" />{successLabel}</span>
        <span className="wlkr-action-state" aria-hidden={state !== "error"}><X className="wlkr-action-error" aria-hidden="true" />{failureLabel}</span>
      </Button>
      <span role="status" className="sr-only">{state === "error" ? errorLabel : state === "success" ? successLabel : state === "pending" ? pendingLabel : ""}</span>
    </span>
  )
}

"use client"

import * as React from "react"
import { Search, X } from "lucide-react"
import { Input } from "@/components/ui/input"
import { Button } from "@/components/ui/button"

export type FilterListItem = { id: string; label: string; description?: string; keywords?: string[] }

/** A small searchable list. Matching ignores case and accents, with a live result count. */
export function FilterList({ items, label = "Search items", placeholder = "Find something…" }: { items: FilterListItem[]; label?: string; placeholder?: string }) {
  const [query, setQuery] = React.useState("")
  const id = React.useId()
  const input = React.useRef<HTMLInputElement>(null)
  const normalize = (value: string) => value.normalize("NFD").replace(/[\u0300-\u036f]/g, "").toLocaleLowerCase()
  const words = normalize(query).trim().split(/\s+/).filter(Boolean)
  const results = items.filter(item => words.every(word => normalize([item.label, item.description, ...(item.keywords ?? [])].join(" ")).includes(word)))
  return (
    <div className="flex w-full flex-col gap-5">
      <style>{`
.wlkr-filter-search{position:relative}
.wlkr-filter-search:focus-within>svg{color:var(--foreground,currentColor)}
.wlkr-filter-search:focus-within::after{content:"";position:absolute;left:0;bottom:1px;width:16px;height:2px;background:var(--foreground,currentColor)}
.wlkr-filter-input[data-slot=input]:focus-visible{outline:none;box-shadow:none;border-color:transparent}
.wlkr-filter-input[data-slot=input]{border:0;box-shadow:none;background:none;border-radius:0}
.wlkr-filter-input{caret-color:var(--foreground,currentColor)}
@supports(caret-shape:block){.wlkr-filter-input{caret-shape:block}}
      `}</style>
      <div className="wlkr-filter-search flex items-center gap-3">
        <Search className="size-4 shrink-0 text-muted-foreground" aria-hidden="true" />
        <label htmlFor={id} className="sr-only">{label}</label>
        <Input className="wlkr-filter-input" ref={input} id={id} type="search" placeholder={placeholder} value={query} onChange={event => setQuery(event.target.value)} aria-describedby={`${id}-count`} />
        {query && <Button type="button" variant="ghost" size="icon" aria-label="Clear search" onClick={() => { setQuery(""); input.current?.focus() }}><X /></Button>}
      </div>
      <p id={`${id}-count`} role="status" className="text-xs text-muted-foreground">{results.length} {results.length === 1 ? "result" : "results"}</p>
      <ul className="flex flex-col gap-5">
        {results.map(item => <li key={item.id}><p className="text-sm font-medium">{item.label}</p>{item.description && <p className="mt-1 text-sm text-muted-foreground">{item.description}</p>}</li>)}
      </ul>
      {results.length === 0 && <p className="text-sm text-muted-foreground">No matches. Try another search or clear the filter.</p>}
    </div>
  )
}

"use client"

import * as React from "react"
import { Pause, Play } from "lucide-react"
import { Button } from "@/components/ui/button"
import { cn } from "@/lib/utils"

export type PixelPoint = { x: number; y: number; z?: number }

/** A sphere point cloud; pass your own points or a #/space mask to display an object. */
export function spherePoints(count = 420): PixelPoint[] {
  const total = Math.max(12, Math.min(2000, Math.round(count)))
  return Array.from({ length: total }, (_, index) => {
    const y = 1 - (index / (total - 1)) * 2
    const radius = Math.sqrt(1 - y * y)
    const angle = index * Math.PI * (3 - Math.sqrt(5))
    return { x: Math.cos(angle) * radius, y, z: Math.sin(angle) * radius }
  })
}
const sphere = spherePoints()
const styles = `
.wlkr-pixel-object{display:flex;flex-direction:column;align-items:center;gap:12px;max-width:100%}
.wlkr-pixel-object svg{display:block;width:100%;height:auto;max-width:320px;overflow:visible}
.wlkr-pixel-toggle{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:44px;min-height:44px;padding:0 12px;cursor:pointer}
.wlkr-pixel-toggle svg{width:14px;height:14px}
.wlkr-pixel-toggle:focus-visible{outline:2px solid var(--ring,currentColor);outline-offset:4px}
.wlkr-pixel-note{font-size:12px;color:var(--muted-foreground,#696969)}
`

/**
 * A projected pixel object, not a video or canvas. Coordinates are normalized to [-1, 1].
 * A mask uses # for filled pixels and spaces/dots for empty pixels; rows need not be equal.
 * Motion pauses off-screen, in hidden tabs, on user pause, and for reduced motion.
 */
export function PixelObject({ points, mask, resolution = 36, size = 260, label = "Rotating pixel sphere", rotating = true, className }: {
  points?: PixelPoint[]
  mask?: string[]
  resolution?: number
  size?: number
  label?: string
  rotating?: boolean
  className?: string
}) {
  const root = React.useRef<HTMLDivElement>(null)
  const angle = React.useRef(0)
  const [rotation, setRotation] = React.useState(0)
  const [paused, setPaused] = React.useState(false)
  const [motion, setMotion] = React.useState(false)
  const grid = Math.max(8, Math.min(80, Math.round(Number.isFinite(resolution) ? resolution : 36)))
  const dimension = Math.max(64, Math.min(1000, Number.isFinite(size) ? size : 260))
  const cloud = React.useMemo(() => {
    if (mask) {
      const rows = mask.slice(0, 80)
      const width = Math.max(1, ...rows.map(row => row.slice(0, 80).length))
      return rows.flatMap((row, y) => [...row.slice(0, 80)].flatMap((pixel, x) => pixel === "#" ? [{ x: width === 1 ? 0 : (x / (width - 1)) * 2 - 1, y: rows.length === 1 ? 0 : 1 - (y / (rows.length - 1)) * 2, z: 0 }] : []))
    }
    return (points ?? sphere).filter(point => Number.isFinite(point.x) && Number.isFinite(point.y) && Number.isFinite(point.z ?? 0)).slice(0, 2000)
  }, [points, mask])

  React.useEffect(() => {
    const preference = window.matchMedia("(prefers-reduced-motion: reduce)")
    let intersecting = false
    let frame = 0
    let last = 0
    let drawn = 0
    function stop() { if (frame) cancelAnimationFrame(frame); frame = 0; last = 0 }
    function tick(time: number) {
      const elapsed = last ? Math.min(time - last, 80) : 0
      last = time
      angle.current += elapsed * .00015
      // Slow rotation sampled at 12 fps keeps the discrete pixels deliberate.
      if (time - drawn >= 80) { setRotation(angle.current); drawn = time }
      frame = requestAnimationFrame(tick)
    }
    function sync() {
      const active = rotating && !paused && !preference.matches && intersecting && !document.hidden
      setMotion(active)
      if (active && !frame) frame = requestAnimationFrame(tick)
      if (!active) stop()
    }
    const observer = new IntersectionObserver(entries => { intersecting = entries[0]?.isIntersecting ?? false; sync() }, { threshold: .05 })
    if (root.current) observer.observe(root.current)
    preference.addEventListener("change", sync)
    document.addEventListener("visibilitychange", sync)
    sync()
    return () => { stop(); observer.disconnect(); preference.removeEventListener("change", sync); document.removeEventListener("visibilitychange", sync) }
  }, [rotating, paused])

  const pixels = new Map<string, { x: number; y: number; opacity: number }>()
  const cosine = Math.cos(rotation)
  const sine = Math.sin(rotation)
  for (const point of cloud) {
    const z = point.z ?? 0
    const x = point.x * cosine + z * sine
    const depth = -point.x * sine + z * cosine
    const column = Math.round((x * .43 + .5) * (grid - 1))
    const row = Math.round((-point.y * .43 + .5) * (grid - 1))
    if (column < 0 || column >= grid || row < 0 || row >= grid) continue
    const opacity = .22 + Math.max(0, Math.min(1, (depth + 1) / 2)) * .73
    const key = `${column},${row}`
    if (!pixels.has(key) || pixels.get(key)!.opacity < opacity) pixels.set(key, {x:column,y:row,opacity})
  }
  return <div ref={root} className={cn("wlkr-pixel-object", className)} style={{width:dimension}} data-motion={motion ? "running" : "paused"}>
    <style>{styles}</style>
    <svg viewBox={`0 0 ${grid} ${grid}`} role="img" aria-label={label}>
      {[...pixels.entries()].map(([key, pixel]) => <rect key={key} x={pixel.x} y={pixel.y} width=".72" height=".72" rx=".06" fill="currentColor" opacity={pixel.opacity} />)}
    </svg>
    {rotating && <Button type="button" className="wlkr-pixel-toggle" variant="ghost" aria-label={paused ? "Resume object rotation" : "Pause object rotation"} aria-pressed={paused} onClick={() => setPaused(value => !value)}>{paused ? <Play aria-hidden="true" /> : <Pause aria-hidden="true" />}<span>{paused ? "Resume" : "Pause"}</span></Button>}
    <span role="status" className="sr-only">{motion ? "Object rotation active." : "Object is still."}</span>
  </div>
}