1e:Tcd38,
'use client';

import { useEffect, useEffectEvent, useRef } from 'react';

const GRID = 48;
const PIXEL = 2;
const SIZE = GRID * PIXEL;
const RADIUS = (GRID - 1) / 2;
const BAYER = [0, 8, 2, 10, 12, 4, 14, 6, 3, 11, 1, 9, 15, 7, 13, 5];
const TURN = Math.PI * 2;
const LOOP_DURATION_MS = 3500;
const clamp = (value: number) => Math.max(0, Math.min(1, value));

const drawPixel = (
  ctx: CanvasRenderingContext2D,
  x: number,
  y: number,
  phase: number,
  density: number,
) => {
  const dx = x - RADIUS;
  const dy = y - RADIUS;
  if (Math.hypot(dx, dy) > RADIUS) return;

  const threshold = ((BAYER[(y % 4) * 4 + (x % 4)] ?? 0) + 0.5) / 16;
  const flow =
    0.5 * Math.sin(dx * 0.2 + dy * 0.07 + phase) +
    0.3 * Math.sin(dx * 0.08 - dy * 0.18 - phase) +
    0.2 * Math.sin((dx + dy) * 0.14 + phase * 2);
  const light = density - dx * 0.012 - dy * 0.007 + flow * 0.24;
  const edge =
    Math.hypot(dx - 1, dy) > RADIUS ||
    Math.hypot(dx + 1, dy) > RADIUS ||
    Math.hypot(dx, dy - 1) > RADIUS ||
    Math.hypot(dx, dy + 1) > RADIUS;
  const alpha = clamp(((edge ? Math.max(light, threshold + 0.11) : light) - threshold) / 0.13);
  if (alpha === 0) return;

  const amber = (Math.sin(x * 0.19 + y * 0.09 - phase) + 1) * 0.4;
  const rose = Math.max(0, Math.sin(x * 0.17 - y * 0.2 + phase + 0.7)) * 0.65;
  const pale = clamp((0.22 - (light - threshold)) / 0.22) * 0.25;
  const color = [
    224 + 31 * amber + (13 - 31 * amber) * rose,
    86 + 99 * amber + (42 - 99 * amber) * rose,
    73 + 23 * amber + (83 - 23 * amber) * rose,
  ].map(channel => Math.round(channel + (255 - channel) * pale));

  ctx.fillStyle = `rgb(${color.join(' ')})`;
  ctx.globalAlpha = alpha;
  ctx.fillRect(x * PIXEL, y * PIXEL, PIXEL, PIXEL);
};

const paint = (ctx: CanvasRenderingContext2D, phase: number, density: number) => {
  ctx.clearRect(0, 0, SIZE, SIZE);
  for (let y = 0; y < GRID; y += 1) {
    for (let x = 0; x < GRID; x += 1) drawPixel(ctx, x, y, phase, density);
  }
  ctx.globalAlpha = 1;
};

interface PixelBallProps {
  density?: number;
  onProgress?: (value: number) => void;
  paused?: boolean;
  progress?: number;
  size?: number;
  speed?: number;
}

export function PixelBall({
  size = SIZE,
  speed = 1,
  density = 0.72,
  paused,
  progress,
  onProgress,
}: PixelBallProps) {
  const canvas = useRef<HTMLCanvasElement>(null);
  const phase = useRef(0);
  const reportProgress = useEffectEvent((value: number) => onProgress?.(value));

  useEffect(() => {
    if (progress === undefined) return;
    phase.current = progress * TURN;
    const ctx = canvas.current?.getContext('2d');
    if (ctx) paint(ctx, phase.current, density);
  }, [progress, density]);

  useEffect(() => {
    const ctx = canvas.current?.getContext('2d');
    if (!ctx) return;

    const reduced = window.matchMedia('(prefers-reduced-motion: reduce)').matches;
    const animate = paused === undefined ? !reduced : !paused;
    let frame = 0;
    let previous = performance.now();

    const tick = (now: number) => {
      phase.current =
        (phase.current + (Math.min(now - previous, 100) / LOOP_DURATION_MS) * TURN * speed) % TURN;
      previous = now;
      paint(ctx, phase.current, density);
      reportProgress(phase.current / TURN);
      frame = requestAnimationFrame(tick);
    };

    paint(ctx, phase.current, density);
    reportProgress(phase.current / TURN);
    if (animate) frame = requestAnimationFrame(tick);
    return () => cancelAnimationFrame(frame);
  }, [speed, density, paused]);

  return (
    <canvas
      height={SIZE}
      ref={canvas}
      style={{ height: size, imageRendering: 'pixelated', width: size }}
      width={SIZE}
    />
  );
}
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