Ansi Output

"use client"

import * as React from "react"
import { AnsiOutput } from "@/components/ui/ansi-output"

const FIT_CSS = "html,body{overflow:hidden}[data-fit-small] [data-fit-hide]{display:none!important}"

/**
 * 21st shows a demo in a small frame: about 674 by 421 on a component page, 358 by 224 on a
 * phone and 245 by 139 on a profile card. A demo taller than its frame gets scrollbars, which
 * render white on dark pages. FitFrame fills the frame exactly instead.
 *
 * - "scale": the content shrinks until it fits, centered. For visuals such as orbs.
 * - "crop": the content stays at full size from the top and fades out at the bottom. For text
 *   that streams in, where a changing scale would make the page breathe.
 *
 * `minWidth` lays out a wide demo (a table, a two column panel) at that width and scales it down
 * to the frame, instead of letting it collapse to a narrow layout. The frame centers it, so it
 * shrinks evenly on both sides.
 *
 * Anything marked `data-fit-hide` (state buttons, the chatcn.dev line) drops out in frames
 * shorter than `hideBelow`, so a profile card shows the visual alone.
 */
function FitFrame({
  children,
  mode = "scale",
  hideBelow = 360,
  minWidth,
}: {
  children: React.ReactNode
  mode?: "scale" | "crop"
  hideBelow?: number
  minWidth?: string
}) {
  const content = React.useRef<HTMLDivElement>(null)
  const [cropped, setCropped] = React.useState(false)

  React.useLayoutEffect(() => {
    const el = content.current
    if (!el) return
    const measure = () => {
      const vw = window.innerWidth
      const vh = window.innerHeight
      el.toggleAttribute("data-fit-small", vh < hideBelow)
      // Layout sizes ignore the transform, so measuring never feeds back.
      const w = Math.max(el.offsetWidth, el.scrollWidth)
      const h = Math.max(el.offsetHeight, el.scrollHeight)
      const scale = mode === "scale" ? Math.min(1, vw / w, vh / h) : 1
      el.style.transform = scale < 1 ? `scale(${scale})` : ""
      setCropped(mode === "crop" && h > vh + 1)
    }
    measure()
    const observer = new ResizeObserver(measure)
    observer.observe(el)
    // Content that changes inside a fixed width box (a headline that cycles words) never resizes
    // the box itself, so changes below it measure again on the next frame.
    let frame = 0
    const mutations = new MutationObserver(() => {
      cancelAnimationFrame(frame)
      frame = requestAnimationFrame(measure)
    })
    mutations.observe(el, { subtree: true, childList: true, characterData: true })
    window.addEventListener("resize", measure)
    return () => {
      observer.disconnect()
      mutations.disconnect()
      cancelAnimationFrame(frame)
      window.removeEventListener("resize", measure)
    }
  }, [mode, hideBelow])

  const fade = "linear-gradient(to bottom, #000 calc(100% - 40px), transparent)"
  return (
    <div
      className="flex w-full justify-center overflow-hidden"
      style={{
        height: "100dvh",
        alignItems: mode === "crop" ? "flex-start" : "center",
        maskImage: cropped ? fade : undefined,
        WebkitMaskImage: cropped ? fade : undefined,
      }}
    >
      <style>{FIT_CSS}</style>
      <div
        ref={content}
        className="w-full shrink-0"
        style={{ transformOrigin: mode === "crop" ? "top center" : "center", minWidth }}
      >
        {children}
      </div>
    </div>
  )
}

const E = "\u001b["

const LINES = [
  `${E}1m${E}46m RUN ${E}49m${E}22m ${E}36mv3.2.4${E}39m ${E}90m/Users/mira/code/checkout${E}39m`,
  "",
  ` ${E}32m✓${E}39m src/lib/money.test.ts ${E}90m(14 tests)${E}39m ${E}90m12ms${E}39m`,
  ` ${E}32m✓${E}39m src/lib/partial-json.test.ts ${E}90m(38 tests)${E}39m ${E}90m41ms${E}39m`,
  ` ${E}32m✓${E}39m src/api/intents.test.ts ${E}90m(9 tests)${E}39m ${E}33m208ms${E}39m`,
  ` ${E}31m❯${E}39m src/api/webhooks.test.ts ${E}90m(6 tests | ${E}31m1 failed${E}39m)${E}39m ${E}90m96ms${E}39m`,
  `   ${E}32m✓${E}39m verifies the Stripe signature`,
  `   ${E}31m×${E}39m retries a failed delivery with backoff`,
  "",
  `${E}31m⎯⎯⎯⎯⎯⎯⎯ Failed Tests 1 ⎯⎯⎯⎯⎯⎯⎯${E}39m`,
  "",
  `${E}41m${E}1m FAIL ${E}22m${E}49m src/api/webhooks.test.ts > retries a failed delivery with backoff`,
  `${E}31m${E}1mAssertionError${E}22m: expected 2 retries, received 3${E}39m`,
  "",
  `${E}36m ❯ src/api/webhooks.test.ts:${E}2m88:22${E}22m${E}39m`,
  `    ${E}90m 86|${E}39m     await deliver(event, { maxRetries: 2 })`,
  `    ${E}90m 87|${E}39m `,
  `    ${E}31m${E}1m 88|${E}22m${E}39m     expect(fetchMock).toHaveBeenCalledTimes(3)`,
  "",
  ` ${E}2mTest Files ${E}22m ${E}1m${E}31m1 failed${E}39m${E}22m${E}2m | ${E}22m${E}1m${E}32m3 passed${E}39m${E}22m ${E}90m(4)${E}39m`,
  ` ${E}2m     Tests ${E}22m ${E}1m${E}31m1 failed${E}39m${E}22m${E}2m | ${E}22m${E}1m${E}32m66 passed${E}39m${E}22m ${E}90m(67)${E}39m`,
  ` ${E}2m  Duration ${E}22m 1.84s`,
]

/** Streams a Vitest run line by line, ends with exit code 1, then starts over. */
function AnsiOutputDemo() {
  const [count, setCount] = React.useState(0)
  const done = count >= LINES.length
  React.useEffect(() => {
    const id = window.setTimeout(
      () => setCount((c) => (c >= LINES.length ? 0 : c + 1)),
      done ? 3200 : count === 0 ? 500 : 140,
    )
    return () => window.clearTimeout(id)
  }, [count, done])

  return (
    <div className="w-full max-w-2xl">
      <AnsiOutput
        command="pnpm vitest run src"
        text={LINES.slice(0, count)
          .map((l) => `${l}\n`)
          .join("")}
        streaming={!done}
        exitCode={done ? 1 : undefined}
        durationMs={done ? 2310 : undefined}
        maxHeight={360}
      />
    </div>
  )
}

/** The line under each 21st demo that points back to the kit. */
function MoreOn({ slug, children }: { slug: string; children: React.ReactNode }) {
  return (
    <p data-fit-hide className="text-[0.75rem]/[1rem] text-(color:--chatcn-fg-faint) text-center text-balance">
      {children}{" "}
      <a
        href={`https://chatcn.dev/docs/components/${slug}`}
        target="_blank"
        rel="noopener"
        className="text-(color:--chatcn-fg-subtle) hover:text-(color:--chatcn-fg) underline underline-offset-2"
      >
        chatcn.dev
      </a>
    </p>
  )
}

/** The kit's own example, framed for the 21st preview. */
export default function AnsiOutputPreview() {
  return (
    <FitFrame minWidth="38rem">
      <div className="flex w-full flex-col items-center justify-center gap-4 p-6">
        <div className="flex h-[24rem] w-full max-w-2xl items-start justify-center">
          <AnsiOutputDemo />
        </div>
        <MoreOn slug="ansi-output">Terminal output with real ANSI colors and styles. On</MoreOn>
      </div>
    </FitFrame>
  )
}