'use client';

import React, { useRef, useEffect } from 'react';
import { useScroll, useTransform, useSpring, m } from 'framer-motion';
import { LogoArcs } from '@/components/ui/LogoArcs';

function MagneticRing({ 
  children, 
  className, 
  pullStrength = 30, // How strong the pull is (higher = moves closer to mouse)
  pullRadius = 600   // Distance from center at which it starts pulling
}: { 
  children: React.ReactNode, 
  className?: string,
  pullStrength?: number,
  pullRadius?: number
}) {
  const ref = useRef<HTMLDivElement>(null);
  
  // Spring physics for extremely smooth, organic movement
  const x = useSpring(0, { stiffness: 40, damping: 25, mass: 1 });
  const y = useSpring(0, { stiffness: 40, damping: 25, mass: 1 });

  useEffect(() => {
    // Only run on client with mouse
    if (window.matchMedia("(pointer: coarse)").matches) return;

    let ticking = false;

    const handleMouseMove = (e: MouseEvent) => {
      if (!ref.current) return;
      
      if (!ticking) {
        window.requestAnimationFrame(() => {
          if (!ref.current) {
            ticking = false;
            return;
          }
          
          const rect = ref.current.getBoundingClientRect();
          const centerX = rect.left + rect.width / 2;
          const centerY = rect.top + rect.height / 2;

          const distX = e.clientX - centerX;
          const distY = e.clientY - centerY;
          const actualDistance = Math.sqrt(distX * distX + distY * distY);

          if (actualDistance < pullRadius) {
            // Exponential falloff for natural magnetic feel
            const pullFactor = Math.pow(1 - (actualDistance / pullRadius), 2);
            
            // Target offset (fraction of the distance based on strength)
            x.set(distX * pullFactor * (pullStrength / 100));
            y.set(distY * pullFactor * (pullStrength / 100));
          } else {
            // Return to origin smoothly
            x.set(0);
            y.set(0);
          }
          ticking = false;
        });
        ticking = true;
      }
    };
    
    window.addEventListener('mousemove', handleMouseMove, { passive: true });
    return () => window.removeEventListener('mousemove', handleMouseMove);
  }, [x, y, pullRadius, pullStrength]);

  return (
    <m.div
      ref={ref}
      style={{ x, y }}
      className={className}
    >
      {children}
    </m.div>
  );
}

export function CorporateBackground() {
  const { scrollYProgress } = useScroll();

  // Stronger parallax offsets for visible movement
  const y1 = useTransform(scrollYProgress, [0, 1], [0, -400]);
  const y2 = useTransform(scrollYProgress, [0, 1], [0, 500]);
  const y3 = useTransform(scrollYProgress, [0, 1], [0, -600]);
  const y4 = useTransform(scrollYProgress, [0, 1], [0, 350]);
  const y5 = useTransform(scrollYProgress, [0, 1], [0, -500]);

  return (
    <div className="absolute inset-0 z-[50] overflow-hidden pointer-events-none hidden md:block" aria-hidden="true">
      {/* 1. Top Right - Medium, rotating moderately */}
      <m.div 
        style={{ 
          y: y1,
          animationDelay: '0s',
          maskImage: 'radial-gradient(circle at center, black 10%, transparent 60%)', 
          WebkitMaskImage: 'radial-gradient(circle at center, black 10%, transparent 60%)' 
        }}
        className="absolute top-[0%] right-0 translate-x-[40%] w-[400px] h-[400px] md:w-[700px] md:h-[700px] animate-bg-pulse-20"
      >
        <MagneticRing pullRadius={700} pullStrength={40} className="w-full h-full">
          <m.div
            animate={{ rotate: 360 }}
            transition={{ duration: 40, repeat: Infinity, ease: "linear" }}
            className="w-full h-full text-primary"
          >
            <LogoArcs className="w-full h-full" />
          </m.div>
        </MagneticRing>
      </m.div>

      {/* 2. Quarter way down left - Smaller, rotating fast reverse */}
      <m.div 
        style={{ 
          y: y2,
          animationDelay: '3s',
          maskImage: 'radial-gradient(circle at center, black 15%, transparent 65%)', 
          WebkitMaskImage: 'radial-gradient(circle at center, black 15%, transparent 65%)' 
        }}
        className="absolute top-[20%] left-0 -translate-x-[40%] w-[300px] h-[300px] md:w-[500px] md:h-[500px] animate-bg-pulse-15"
      >
        <MagneticRing pullRadius={500} pullStrength={50} className="w-full h-full">
          <m.div
            animate={{ rotate: -360 }}
            transition={{ duration: 30, repeat: Infinity, ease: "linear" }}
            className="w-full h-full text-secondary"
          >
            <LogoArcs className="w-full h-full -rotate-45" />
          </m.div>
        </MagneticRing>
      </m.div>

      {/* 3. Halfway down right - Medium, rotating slow */}
      <m.div 
        style={{ 
          y: y3,
          animationDelay: '6s',
          maskImage: 'radial-gradient(circle at center, black 10%, transparent 60%)', 
          WebkitMaskImage: 'radial-gradient(circle at center, black 10%, transparent 60%)' 
        }}
        className="absolute top-[45%] right-0 translate-x-[30%] w-[350px] h-[350px] md:w-[600px] md:h-[600px] animate-bg-pulse-15"
      >
        <MagneticRing pullRadius={600} pullStrength={35} className="w-full h-full">
          <m.div
            animate={{ rotate: 360 }}
            transition={{ duration: 60, repeat: Infinity, ease: "linear" }}
            className="w-full h-full text-primary"
          >
            <LogoArcs className="w-full h-full rotate-90" />
          </m.div>
        </MagneticRing>
      </m.div>

      {/* 4. Bottom left - Larger, rotating moderately */}
      <m.div 
        style={{ 
          y: y4,
          animationDelay: '9s',
          maskImage: 'radial-gradient(circle at center, black 5%, transparent 60%)', 
          WebkitMaskImage: 'radial-gradient(circle at center, black 5%, transparent 60%)' 
        }}
        className="absolute top-[70%] left-0 -translate-x-[40%] w-[500px] h-[500px] md:w-[800px] md:h-[800px] animate-bg-pulse-20"
      >
        <MagneticRing pullRadius={800} pullStrength={30} className="w-full h-full">
          <m.div
            animate={{ rotate: -360 }}
            transition={{ duration: 50, repeat: Infinity, ease: "linear" }}
            className="w-full h-full text-secondary"
          >
            <LogoArcs className="w-full h-full rotate-180" />
          </m.div>
        </MagneticRing>
      </m.div>
      
      {/* 5. Deep bottom right - Smallest, very fast */}
      <m.div 
        style={{ 
          y: y5,
          animationDelay: '12s',
          maskImage: 'radial-gradient(circle at center, black 20%, transparent 70%)', 
          WebkitMaskImage: 'radial-gradient(circle at center, black 20%, transparent 70%)' 
        }}
        className="absolute top-[88%] right-0 translate-x-[50%] w-[250px] h-[250px] md:w-[400px] md:h-[400px] animate-bg-pulse-15"
      >
        <MagneticRing pullRadius={400} pullStrength={60} className="w-full h-full">
          <m.div
            animate={{ rotate: 360 }}
            transition={{ duration: 25, repeat: Infinity, ease: "linear" }}
            className="w-full h-full text-primary"
          >
            <LogoArcs className="w-full h-full -rotate-12" />
          </m.div>
        </MagneticRing>
      </m.div>
    </div>
  );
}