'use client';

import { memo, useCallback, useEffect, useRef } from 'react';
import { cn } from '~/shared/utils/cn';
import { animate } from 'framer-motion';

interface GlowingEffectProps {
  blur?: number;
  inactiveZone?: number;
  proximity?: number;
  spread?: number;
  variant?: 'default' | 'white';
  glow?: boolean;
  className?: string;
  disabled?: boolean;
  movementDuration?: number;
  borderWidth?: number;
}

const GlowingEffect = memo(
  ({
    blur = 0,
    inactiveZone = 0.7,
    proximity = 0,
    spread = 20,
    variant = 'default',
    glow = false,
    className,
    movementDuration = 2,
    borderWidth = 1,
    disabled = true,
  }: GlowingEffectProps) => {
    const containerRef = useRef<HTMLDivElement>(null);
    const lastPosition = useRef({ x: 0, y: 0 });
    const animationFrameRef = useRef<number>(0);

    const handleMove = useCallback(
      (e?: MouseEvent | { x: number; y: number }) => {
        if (!containerRef.current) {
          return;
        }

        if (animationFrameRef.current) {
          cancelAnimationFrame(animationFrameRef.current);
        }

        animationFrameRef.current = requestAnimationFrame(() => {
          const element = containerRef.current;

          if (!element) {
            return;
          }

          const { left, top, width, height } = element.getBoundingClientRect();
          const mouseX = e?.x ?? lastPosition.current.x;
          const mouseY = e?.y ?? lastPosition.current.y;

          if (e) {
            lastPosition.current = { x: mouseX, y: mouseY };
          }

          const center = [left + width * 0.5, top + height * 0.5];
          const distanceFromCenter = Math.hypot(mouseX - center[0], mouseY - center[1]);
          const inactiveRadius = 0.5 * Math.min(width, height) * inactiveZone;

          if (distanceFromCenter < inactiveRadius) {
            element.style.setProperty('--active', '0');
            return;
          }

          const isActive =
            mouseX > left - proximity &&
            mouseX < left + width + proximity &&
            mouseY > top - proximity &&
            mouseY < top + height + proximity;

          element.style.setProperty('--active', isActive ? '1' : '0');

          if (!isActive) {
            return;
          }

          const currentAngle = parseFloat(element.style.getPropertyValue('--start')) || 0;
          const targetAngle = (180 * Math.atan2(mouseY - center[1], mouseX - center[0])) / Math.PI + 90;

          const angleDiff = ((targetAngle - currentAngle + 180) % 360) - 180;
          const newAngle = currentAngle + angleDiff;

          animate(currentAngle, newAngle, {
            duration: movementDuration,
            ease: [0.16, 1, 0.3, 1],
            onUpdate: (value) => {
              element.style.setProperty('--start', String(value));
            },
          });
        });
      },
      [inactiveZone, proximity, movementDuration],
    );

    useEffect(() => {
      if (disabled) {
        return undefined;
      }

      const handleScroll = () => handleMove();
      const handlePointerMove = (e: PointerEvent) => handleMove(e);

      window.addEventListener('scroll', handleScroll, { passive: true });
      document.body.addEventListener('pointermove', handlePointerMove, {
        passive: true,
      });

      return () => {
        if (animationFrameRef.current) {
          cancelAnimationFrame(animationFrameRef.current);
        }

        window.removeEventListener('scroll', handleScroll);
        document.body.removeEventListener('pointermove', handlePointerMove);
      };
    }, [handleMove, disabled]);

    return (
      <>
        <div
          className={cn(
            'pointer-events-none absolute -inset-px hidden rounded-[inherit] border opacity-0 transition-opacity',
            glow && 'opacity-100',
            variant === 'white' && 'border-white',
            disabled && '!block',
          )}
        />
        <div
          ref={containerRef}
          style={
            {
              '--blur': `${blur}px`,
              '--spread': spread,
              '--start': '0',
              '--active': '0',
              '--glowingeffect-border-width': `${borderWidth}px`,
              '--repeating-conic-gradient-times': '5',
              '--gradient':
                variant === 'white'
                  ? `repeating-conic-gradient(
                      from 236.84deg at 50% 50%,
                      var(--black),
                      var(--black) calc(25% / var(--repeating-conic-gradient-times))
                    )`
                  : `radial-gradient(circle, #9333ea 10%, #9333ea00 20%),
                    radial-gradient(circle at 40% 40%, #a855f7 5%, #a855f700 15%),
                    radial-gradient(circle at 60% 60%, #8b5cf6 10%, #8b5cf600 20%),
                    radial-gradient(circle at 40% 60%, #f63bdd 10%, #3b82f600 20%),
                    repeating-conic-gradient(
                      from 236.84deg at 50% 50%,
                      #9333ea 0%,
                      #a855f7 calc(25% / var(--repeating-conic-gradient-times)),
                      #8b5cf6 calc(50% / var(--repeating-conic-gradient-times)),
                      #f63bdd calc(75% / var(--repeating-conic-gradient-times)),
                      #9333ea calc(100% / var(--repeating-conic-gradient-times))
                    )`,
            } as React.CSSProperties
          }
          className={cn(
            'pointer-events-none absolute inset-0 rounded-[inherit] opacity-100 transition-opacity',
            glow && 'opacity-100',
            blur > 0 && 'blur-[var(--blur)] ',
            className,
            disabled && '!hidden',
          )}
        >
          <div
            className={cn(
              'glow',
              'rounded-[inherit]',
              'after:content-[""] after:rounded-[inherit] after:absolute after:inset-[calc(-1*var(--glowingeffect-border-width))]',
              'after:[border:var(--glowingeffect-border-width)_solid_transparent]',
              'after:[background:var(--gradient)] after:[background-attachment:fixed]',
              'after:opacity-[var(--active)] after:transition-opacity after:duration-300',
              'after:[mask-clip:padding-box,border-box]',
              'after:[mask-composite:intersect]',
              'after:[mask-image:linear-gradient(#0000,#0000),conic-gradient(from_calc((var(--start)-var(--spread))*1deg),#00000000_0deg,#fff,#00000000_calc(var(--spread)*2deg))]',
            )}
          />
        </div>
      </>
    );
  },
);

GlowingEffect.displayName = 'GlowingEffect';

export { GlowingEffect };