Party Popper

"use client";

import gsap from "gsap";
import { useRef } from "react";
import { cn } from "@/lib/utils";

function random(min: number, max: number) {
  return Math.random() * (max - min) + min;
}

type PopDirection =
  | "center"
  | "up"
  | "down"
  | "left"
  | "right";

const DIRECTION_ANGLES: Record<
  PopDirection,
  {
    center: number;
    spread: number;
    streamerCenter: number;
    streamerSpread: number;
  }
> = {
  center: {
    center: 0,
    spread: 180,
    streamerCenter: 315,
    streamerSpread: 25,
  },
  down: {
    center: 90,
    spread: 60,
    streamerCenter: 90,
    streamerSpread: 40,
  },
  left: {
    center: 180,
    spread: 60,
    streamerCenter: 180,
    streamerSpread: 40,
  },
  right: {
    center: 0,
    spread: 60,
    streamerCenter: 0,
    streamerSpread: 40,
  },
  up: {
    center: 270,
    spread: 60,
    streamerCenter: 270,
    streamerSpread: 40,
  },
};

function randomAngle(center: number, spread: number) {
  return center + random(-spread, spread);
}

interface PartyPopperProps {
  children: React.ReactNode;
  className?: string;
  particleCount?: number;
  streamerCount?: number;
  direction?: PopDirection;
  colors?: readonly string[];
  particleSizeMin?: number;
  particleSizeMax?: number;
  streamerWidthMin?: number;
  streamerWidthMax?: number;
  streamerHeightMin?: number;
  streamerHeightMax?: number;
}

export function PartyPopper({
  children,
  className,
  particleCount = 12,
  streamerCount = 4,
  direction = "center",
  colors: colorsProp,
  particleSizeMin = 8,
  particleSizeMax = 12,
  streamerWidthMin = 25,
  streamerWidthMax = 35,
  streamerHeightMin = 4,
  streamerHeightMax = 6,
}: PartyPopperProps) {
  const colors = colorsProp ?? [
    "#ff6b6b",
    "#4ecdc4",
    "#45b7d1",
    "#96ceb4",
    "#feca57",
    "#ff9ff3",
    "#54a0ff",
    "#5f27cd",
    "#00d2d3",
    "#ff9f43",
    "#10ac84",
    "#ee5a24",
  ];
  const getColor = () =>
    colors[Math.floor(Math.random() * colors.length)] ??
    "#000";
  const triggerRef = useRef<HTMLButtonElement>(null);
  const particleContainerRef = useRef<HTMLDivElement>(null);

  const prefersReducedMotion =
    typeof window !== "undefined"
      ? window.matchMedia(
          "(prefers-reduced-motion: reduce)",
        ).matches
      : false;

  function createParticle(
    shape: string,
    size: number,
    color: string,
    x: number,
    y: number,
  ) {
    const particle = document.createElement("div");
    particle.style.position = "absolute";
    particle.style.left = `${x}px`;
    particle.style.top = `${y}px`;
    particle.style.width = `${size}px`;
    particle.style.height = `${size}px`;
    particle.style.background = color;
    particle.style.borderRadius =
      shape === "circle" ? "50%" : "0";
    particle.style.transform = "translate(-50%, -50%)";
    particle.style.pointerEvents = "none";

    return particle;
  }

  function pop() {
    const trigger = triggerRef.current;
    const container = particleContainerRef.current;
    if (!(trigger && container) || prefersReducedMotion) {
      return;
    }

    const rect = trigger.getBoundingClientRect();
    const originX = rect.left + rect.width / 2;
    const originY = rect.top + rect.height / 2;

    const {
      center,
      spread,
      streamerCenter,
      streamerSpread,
    } = DIRECTION_ANGLES[direction];

    for (let i = 0; i < particleCount; i++) {
      const size = random(particleSizeMin, particleSizeMax);
      const shape = i % 3 === 0 ? "square" : "circle";
      const color = getColor();
      const particle = createParticle(
        shape,
        size,
        color,
        originX,
        originY,
      );

      container.appendChild(particle);

      const angle = randomAngle(center, spread);
      const velocity = random(200, 400);
      const vx =
        Math.cos((angle * Math.PI) / 180) * velocity;
      const vy =
        Math.sin((angle * Math.PI) / 180) * velocity;
      const duration = random(1.5, 2.5);
      const fallDistance = random(100, 200);

      const timeline = gsap.timeline({
        onComplete: () => particle.remove(),
      });

      timeline.to(particle, {
        duration: duration * 0.6,
        ease: "power2.out",
        rotation: random(-360, 360),
        x: vx * duration * 0.8,
        y: vy * duration * 0.8,
      });

      timeline.to(
        particle,
        {
          duration: 1.0,
          ease: "power1.in",
          rotation: `+=${random(-180, 180)}`,
          y: `+=${fallDistance}`,
        },
        "-=0.2",
      );

      timeline.to(
        particle,
        {
          duration: 0.8,
          ease: "power2.out",
          opacity: 0,
        },
        "-=0.6",
      );
    }

    for (let i = 0; i < streamerCount; i++) {
      const streamer = document.createElement("div");
      streamer.style.position = "absolute";
      streamer.style.left = `${originX}px`;
      streamer.style.top = `${originY}px`;
      streamer.style.width = `${random(streamerWidthMin, streamerWidthMax)}px`;
      streamer.style.height = `${random(streamerHeightMin, streamerHeightMax)}px`;
      streamer.style.background = getColor();
      streamer.style.borderRadius = "2px";
      streamer.style.transform = "translate(-50%, -50%)";
      streamer.style.pointerEvents = "none";

      container.appendChild(streamer);

      const angle = randomAngle(
        streamerCenter,
        streamerSpread,
      );
      const velocity = random(450, 550);
      const vx =
        Math.cos((angle * Math.PI) / 180) * velocity;
      const vy =
        Math.sin((angle * Math.PI) / 180) * velocity;

      const timeline = gsap.timeline({
        onComplete: () => streamer.remove(),
      });

      timeline.to(streamer, {
        duration: 1.0,
        ease: "power2.out",
        rotation: random(-360, 360),
        x: vx * 1.0,
        y: vy * 1.0,
      });

      timeline.to(
        streamer,
        {
          duration: 1.2,
          ease: "power2.in",
          rotation: `+=${random(-180, 180)}`,
          y: "+=250",
        },
        "-=0.1",
      );

      timeline.to(
        streamer,
        {
          duration: 1.0,
          ease: "power2.out",
          opacity: 0,
        },
        "-=0.8",
      );
    }
  }

  return (
    <>
      <button
        ref={triggerRef}
        type="button"
        onClick={pop}
        className={cn(
          "inline-block cursor-pointer border-0 bg-transparent p-0",
          className,
        )}
      >
        {children}
      </button>
      <div
        ref={particleContainerRef}
        className="pointer-events-none fixed inset-0 z-[99999]"
        aria-hidden={true}
      />
    </>
  );
}