"use client";

import { type ReactNode, useRef } from "react";
import gsap from "gsap";
import { useGSAP } from "@gsap/react";
import { CustomEase } from "gsap/CustomEase";
import { ScrollToPlugin } from "gsap/ScrollToPlugin";
import { ScrollTrigger } from "gsap/ScrollTrigger";
import { SplitText } from "gsap/SplitText";

gsap.registerPlugin(useGSAP, ScrollTrigger, ScrollToPlugin, SplitText, CustomEase);

const bossEase = CustomEase.create("boss-ease", "M0,0 C0.18,0.84 0.32,1 1,1");

type BossAiMotionProps = {
  children: ReactNode;
};

export function BossAiMotion({ children }: BossAiMotionProps) {
  const scopeRef = useRef<HTMLDivElement>(null);

  useGSAP(
    () => {
      const root = scopeRef.current;
      if (!root) {
        return;
      }

      gsap.set("[data-motion]", { autoAlpha: 1 });
      gsap.set("[data-motion-line]", { transformOrigin: "center" });

      const matchMedia = gsap.matchMedia();

      matchMedia.add("(prefers-reduced-motion: reduce)", () => {
        gsap.set("[data-motion], [data-motion-dot], [data-motion-orbit], [data-motion-line]", {
          autoAlpha: 1,
          clearProps: "transform",
        });
      });

      matchMedia.add("(prefers-reduced-motion: no-preference)", () => {
        const heroTitle = root.querySelector<HTMLElement>(".hero-copy h1");
        const splitTitle = heroTitle
          ? SplitText.create(heroTitle, {
              type: "words",
              aria: "auto",
              wordsClass: "hero-word",
            })
          : null;

        const intro = gsap.timeline({ defaults: { ease: bossEase } });
        intro
          .from("[data-motion='nav']", { autoAlpha: 0, y: -18, duration: 0.7 })
          .from(".section-kicker", { autoAlpha: 0, y: 18, duration: 0.56 }, "-=0.18")
          .from(
            splitTitle?.words ?? ".hero-copy h1",
            {
              autoAlpha: 0,
              yPercent: 92,
              rotateX: -18,
              transformOrigin: "50% 100%",
              duration: 0.82,
              stagger: { each: 0.035, from: "start" },
            },
            "-=0.28",
          )
          .from(".hero-copy p", { autoAlpha: 0, y: 22, duration: 0.7 }, "-=0.5")
          .from(".hero-actions > *", { autoAlpha: 0, y: 14, duration: 0.46, stagger: 0.08 }, "-=0.42")
          .from(".hero-proof > div", { autoAlpha: 0, y: 16, duration: 0.5, stagger: 0.07 }, "-=0.28")
          .from("[data-motion='hero-console']", { autoAlpha: 0, y: 34, rotateX: 5, duration: 0.9 }, "-=0.78")
          .from("[data-motion='route-row']", { autoAlpha: 0, x: 24, duration: 0.55, stagger: 0.08 }, "-=0.48")
          .from("[data-motion='node']", { autoAlpha: 0, scale: 0.94, duration: 0.45, stagger: 0.08 }, "-=0.3");

        gsap.to("[data-motion-orbit]", {
          rotate: 360,
          duration: 28,
          ease: "none",
          repeat: -1,
        });

        gsap.to("[data-motion-dot]", {
          scale: 1.18,
          autoAlpha: 0.72,
          duration: 1.4,
          ease: "sine.inOut",
          repeat: -1,
          yoyo: true,
          stagger: 0.24,
        });

        gsap.to("[data-motion-line]", {
          strokeDashoffset: -160,
          duration: 5.8,
          ease: "none",
          repeat: -1,
          stagger: 0.28,
        });

        const heroSection = root.querySelector<HTMLElement>(".hero-section");
        const heroConsole = root.querySelector<HTMLElement>(".hero-console");
        const routeRows = gsap.utils.toArray<HTMLElement>(".route-row", root);
        const consoleTiles = gsap.utils.toArray<HTMLElement>(".console-metrics > div, .mini-grid > div", root);

        if (heroSection && heroConsole) {
          gsap.set(heroConsole, {
            "--scan-y": "12%",
            "--scan-opacity": 0.16,
            "--grid-opacity": 0.16,
          } as gsap.TweenVars);

          gsap.to(heroConsole, {
            yPercent: -4,
            scale: 0.985,
            ease: "none",
            scrollTrigger: {
              trigger: heroSection,
              start: "top top",
              end: "bottom top",
              scrub: 0.85,
            },
          });

          gsap.to(heroConsole, {
            "--scan-y": "88%",
            "--scan-opacity": 0.38,
            "--grid-opacity": 0.34,
            ease: "none",
            scrollTrigger: {
              trigger: heroSection,
              start: "top 18%",
              end: "bottom 18%",
              scrub: 0.7,
            },
          } as gsap.TweenVars);

          gsap.to(routeRows, {
            x: (index) => (index % 2 === 0 ? -4 : 4),
            y: (index) => -2 - index * 0.9,
            autoAlpha: (index) => 1 - index * 0.015,
            ease: "none",
            stagger: 0.03,
            scrollTrigger: {
              trigger: heroConsole,
              start: "top 76%",
              end: "bottom 18%",
              scrub: true,
            },
          });

          gsap.to(consoleTiles, {
            y: -12,
            autoAlpha: 0.9,
            ease: "none",
            stagger: { each: 0.035, from: "end" },
            scrollTrigger: {
              trigger: heroConsole,
              start: "top 72%",
              end: "bottom 24%",
              scrub: true,
            },
          });
        }

        gsap.utils.toArray<HTMLElement>("[data-motion='section']").forEach((section) => {
          gsap.from(section, {
            autoAlpha: 0,
            y: 42,
            duration: 0.82,
            ease: bossEase,
            scrollTrigger: {
              trigger: section,
              start: "top 82%",
              once: true,
            },
          });
        });

        gsap.utils
          .toArray<HTMLElement>("[data-motion='card']")
          .filter((card) => !card.closest(".hero-section"))
          .forEach((card, index) => {
            gsap.from(card, {
              autoAlpha: 0,
              y: 28,
              scale: 0.97,
              duration: 0.62,
              delay: (index % 4) * 0.04,
              ease: bossEase,
              scrollTrigger: {
                trigger: card,
                start: "top 88%",
                once: true,
              },
            });
          });

        const cleanupAnchors = setupSmoothAnchors(root);
        const cleanupActiveNav = setupActiveNavigation(root);
        const cleanupMagneticCards = window.matchMedia("(hover: hover) and (pointer: fine)").matches
          ? setupMagneticCards(root)
          : () => undefined;

        return () => {
          cleanupMagneticCards();
          cleanupActiveNav();
          cleanupAnchors();
          splitTitle?.revert();
        };
      });

      return () => matchMedia.revert();
    },
    { scope: scopeRef },
  );

  return (
    <div ref={scopeRef} className="motion-root">
      {children}
    </div>
  );
}

function setupSmoothAnchors(root: HTMLElement) {
  const anchors = gsap.utils.toArray<HTMLAnchorElement>("a[href^='#']", root);

  const cleanups = anchors.map((anchor) => {
    const onClick = (event: MouseEvent) => {
      const href = anchor.getAttribute("href");
      const targetId = href?.slice(1);
      const target = targetId ? document.getElementById(targetId) : null;
      if (!href || !target) {
        return;
      }

      event.preventDefault();
      window.history.pushState(null, "", href);
      gsap.to(window, {
        duration: 0.92,
        ease: bossEase,
        overwrite: "auto",
        scrollTo: { y: target, offsetY: 22 },
      });
    };

    anchor.addEventListener("click", onClick);
    return () => anchor.removeEventListener("click", onClick);
  });

  return () => cleanups.forEach((cleanup) => cleanup());
}

function setupActiveNavigation(root: HTMLElement) {
  const links = gsap.utils.toArray<HTMLAnchorElement>(".nav-links a[href^='#']", root);
  const linkById = new Map(
    links
      .map((link) => [link.getAttribute("href")?.slice(1), link] as const)
      .filter((entry): entry is readonly [string, HTMLAnchorElement] => Boolean(entry[0])),
  );

  const setActive = (id: string) => {
    links.forEach((link) => link.classList.toggle("is-active", linkById.get(id) === link));
  };

  const triggers = gsap.utils
    .toArray<HTMLElement>("section[id]", root)
    .filter((section) => linkById.has(section.id))
    .map((section) =>
      ScrollTrigger.create({
        trigger: section,
        start: "top 42%",
        end: "bottom 42%",
        onEnter: () => setActive(section.id),
        onEnterBack: () => setActive(section.id),
      }),
    );

  return () => {
    triggers.forEach((trigger) => trigger.kill());
    links.forEach((link) => link.classList.remove("is-active"));
  };
}

function setupMagneticCards(root: HTMLElement) {
  const cards = gsap.utils.toArray<HTMLElement>("[data-motion='card']", root);

  const cleanups = cards.map((card) => {
    const onPointerMove = (event: PointerEvent) => {
      const rect = card.getBoundingClientRect();
      const xRatio = (event.clientX - rect.left) / rect.width - 0.5;
      const yRatio = (event.clientY - rect.top) / rect.height - 0.5;

      gsap.to(card, {
        x: xRatio * 10,
        y: yRatio * 10,
        rotateX: yRatio * -3,
        rotateY: xRatio * 4,
        duration: 0.38,
        ease: "power3.out",
        overwrite: "auto",
      });
    };

    const onPointerLeave = () => {
      gsap.to(card, {
        x: 0,
        y: 0,
        rotateX: 0,
        rotateY: 0,
        duration: 0.58,
        ease: bossEase,
        overwrite: "auto",
      });
    };

    card.addEventListener("pointermove", onPointerMove);
    card.addEventListener("pointerleave", onPointerLeave);

    return () => {
      card.removeEventListener("pointermove", onPointerMove);
      card.removeEventListener("pointerleave", onPointerLeave);
    };
  });

  return () => cleanups.forEach((cleanup) => cleanup());
}