Particles Background Hero

import { useEffect, useRef } from 'react';

import { Button } from '@/components/ui/button';
import { ArrowRight, ExternalLink } from 'lucide-react';

export default function ParticlesBackgroundHero() {
  const canvasRef = useRef<HTMLCanvasElement | null>(null);
  const particlesRef = useRef<Particle[]>([]);
  const mouseRef = useRef<{ x: number | null; y: number | null }>({
    x: null,
    y: null,
  });
  const animationFrameRef = useRef<number>(0);

  interface Particle {
    x: number;
    y: number;
    size: number;
    speedX: number;
    speedY: number;
    color: string;
    alpha: number;
  }

  useEffect(() => {
    const canvas = canvasRef.current;
    if (!canvas) return;

    const ctx = canvas.getContext('2d');
    if (!ctx) return;

    const resizeCanvas = () => {
      canvas.width = window.innerWidth;
      canvas.height = window.innerHeight;
      initParticles();
    };

    const initParticles = () => {
      particlesRef.current = [];
      const particleCount = Math.min(Math.floor(window.innerWidth / 10), 150);
      const colors = ['#3B82F6', '#8B5CF6', '#6366F1', '#EC4899'];

      for (let i = 0; i < particleCount; i++) {
        const size = Math.random() * 5 + 1;
        const x = Math.random() * canvas.width;
        const y = Math.random() * canvas.height;
        const speedX = Math.random() * 1 - 0.5;
        const speedY = Math.random() * 1 - 0.5;
        const color = colors[Math.floor(Math.random() * colors.length)]!;
        const alpha = Math.random() * 0.5 + 0.1;

        particlesRef.current.push({
          x,
          y,
          size,
          speedX,
          speedY,
          color,
          alpha,
        });
      }
    };

    const drawParticles = () => {
      ctx.clearRect(0, 0, canvas.width, canvas.height);

      particlesRef.current.forEach((particle) => {
        ctx.beginPath();
        ctx.arc(particle.x, particle.y, particle.size, 0, Math.PI * 2);
        ctx.fillStyle = `${particle.color}${Math.floor(particle.alpha * 255)
          .toString(16)
          .padStart(2, '0')}`;
        ctx.fill();

        // Update position
        particle.x += particle.speedX;
        particle.y += particle.speedY;

        // Bounce off edges
        if (particle.x < 0 || particle.x > canvas.width) {
          particle.speedX *= -1;
        }

        if (particle.y < 0 || particle.y > canvas.height) {
          particle.speedY *= -1;
        }

        // Connect particles
        connectParticles(particle);

        // Mouse interaction
        if (mouseRef.current.x !== null && mouseRef.current.y !== null) {
          const dx = mouseRef.current.x - particle.x;
          const dy = mouseRef.current.y - particle.y;
          const distance = Math.sqrt(dx * dx + dy * dy);
          const maxDistance = 150;

          if (distance < maxDistance) {
            const force = (maxDistance - distance) / maxDistance;
            const directionX = dx / distance || 0;
            const directionY = dy / distance || 0;
            particle.x -= directionX * force * 2;
            particle.y -= directionY * force * 2;
          }
        }
      });

      animationFrameRef.current = requestAnimationFrame(drawParticles);
    };

    const connectParticles = (p1: Particle) => {
      particlesRef.current.forEach((p2) => {
        if (p1 === p2) return;

        const dx = p1.x - p2.x;
        const dy = p1.y - p2.y;
        const distance = Math.sqrt(dx * dx + dy * dy);
        const maxDistance = 150;

        if (distance < maxDistance) {
          const opacity = 1 - distance / maxDistance;
          ctx.beginPath();
          ctx.moveTo(p1.x, p1.y);
          ctx.lineTo(p2.x, p2.y);
          ctx.strokeStyle = `rgba(200, 200, 255, ${opacity * 0.15})`;
          ctx.lineWidth = 1;
          ctx.stroke();
        }
      });
    };

    const handleMouseMove = (e: MouseEvent) => {
      mouseRef.current = { x: e.clientX, y: e.clientY };
    };

    const handleMouseLeave = () => {
      mouseRef.current = { x: null, y: null };
    };

    // Initialize
    resizeCanvas();
    window.addEventListener('resize', resizeCanvas);
    window.addEventListener('mousemove', handleMouseMove);
    window.addEventListener('mouseleave', handleMouseLeave);

    drawParticles();

    return () => {
      window.removeEventListener('resize', resizeCanvas);
      window.removeEventListener('mousemove', handleMouseMove);
      window.removeEventListener('mouseleave', handleMouseLeave);
      cancelAnimationFrame(animationFrameRef.current);
    };
  }, []);

  return (
    <div className="relative flex min-h-[80vh] items-center justify-center overflow-hidden">
      {/* Particle background */}
      <canvas
        ref={canvasRef}
        className="absolute inset-0 -z-10 h-full w-full"
      />

      <div className="to-background absolute top-0 right-0 left-0 -z-10 h-[80vh] bg-gradient-to-b from-transparent via-transparent"></div>

      {/* Content */}
      <div className="relative z-10 container mx-auto px-4 md:px-6 2xl:max-w-[1400px]">
        <div className="flex flex-col items-center space-y-10 py-20 text-center">
          <div>
            <div className="border-primary/20 bg-primary/10 text-primary mb-6 inline-flex items-center rounded-full border px-3 py-1 text-sm font-semibold">
              Launching Soon — Join the Waitlist
            </div>
            <h1 className="mb-4 max-w-4xl text-4xl font-bold tracking-tight sm:text-5xl md:text-6xl lg:text-7xl">
              The <span className="text-primary">next generation</span> of web
              development
            </h1>
            <p className="text-muted-foreground mx-auto max-w-[700px] md:text-xl">
              Build stunning websites and applications with our innovative
              platform. Faster development, better performance, amazing results.
            </p>
          </div>

          <div className="flex flex-col gap-4 sm:flex-row">
            <Button size="lg" asChild>
              <a href="#">
                Get Early Access
                <ArrowRight className="ml-2 h-4 w-4" />
              </a>
            </Button>
            <Button size="lg" variant="outline" className="gap-2" asChild>
              <a href="#">
                Watch Demo
                <ExternalLink className="h-4 w-4" />
              </a>
            </Button>
          </div>

          <div className="mt-16 flex flex-col items-center">
            <div className="mb-6 text-base font-medium">
              Trusted by innovative teams
            </div>
            <div className="flex flex-wrap justify-center gap-x-12 gap-y-6">
              {/* Company logos */}
              <div className="text-muted-foreground/50 h-8 w-auto">
                <svg
                  className="h-full w-auto"
                  viewBox="0 0 124 34"
                  fill="currentColor"
                >
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                </svg>
              </div>
              <div className="text-muted-foreground/50 h-8 w-auto">
                <svg
                  className="h-full w-auto"
                  viewBox="0 0 139 34"
                  fill="currentColor"
                >
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                </svg>
              </div>
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                <svg
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              <div className="text-muted-foreground/50 h-8 w-auto">
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  );
}