import { useEffect, useRef } from "react";
import gsap from "gsap";
import type { PresentPhoto } from "../../lib/photoWallMarquee";

type PhotoSpotlightProps = {
  photo: PresentPhoto | null;
  borderRadius: number | string;
  holdMs?: number;
  onComplete: () => void;
};

/**
 * Full-screen spotlight for a newly added photo: fade/scale in → hold → out.
 * Optional `message` is shown as a quote (spotlight only — not on wall cards).
 */
export function PhotoSpotlight({
  photo,
  borderRadius,
  holdMs = 2400,
  onComplete,
}: PhotoSpotlightProps) {
  const rootRef = useRef<HTMLDivElement>(null);
  const cardRef = useRef<HTMLDivElement>(null);
  const frameRef = useRef<HTMLDivElement>(null);
  const nameRef = useRef<HTMLParagraphElement>(null);
  const messageRef = useRef<HTMLQuoteElement>(null);
  const onCompleteRef = useRef(onComplete);
  onCompleteRef.current = onComplete;

  const message = photo?.message?.trim() || "";
  const effectiveHoldMs = message ? Math.max(holdMs, 3200) : holdMs;

  useEffect(() => {
    if (!photo || !rootRef.current || !cardRef.current || !frameRef.current) return;

    const ctx = gsap.context(() => {
      const tl = gsap.timeline({
        onComplete: () => onCompleteRef.current(),
      });

      gsap.set(rootRef.current, { autoAlpha: 0 });
      gsap.set(cardRef.current, { scale: 0.82, autoAlpha: 0 });
      gsap.set(frameRef.current, {
        boxShadow:
          "0 0 0 0 color-mix(in srgb, var(--theme-button-color) 0%, transparent)",
      });
      if (nameRef.current) {
        gsap.set(nameRef.current, { autoAlpha: 0, y: 18 });
      }
      if (messageRef.current) {
        gsap.set(messageRef.current, { autoAlpha: 0, y: 22 });
      }

      tl.to(rootRef.current, { autoAlpha: 1, duration: 0.35, ease: "power2.out" })
        .to(
          cardRef.current,
          { scale: 1, autoAlpha: 1, duration: 0.45, ease: "back.out(1.4)" },
          "<0.05",
        )
        .to(
          frameRef.current,
          {
            boxShadow:
              "0 0 48px 18px color-mix(in srgb, var(--theme-button-color) 22%, transparent), 0 0 90px 36px color-mix(in srgb, var(--theme-button-color) 12%, transparent), 0 16px 36px rgba(0,0,0,0.35)",
            duration: 0.55,
            ease: "power2.out",
          },
          "<0.1",
        );

      if (nameRef.current) {
        tl.to(
          nameRef.current,
          { autoAlpha: 1, y: 0, duration: 0.45, ease: "power3.out" },
          "-=0.15",
        );
      }
      if (messageRef.current) {
        tl.to(
          messageRef.current,
          { autoAlpha: 1, y: 0, duration: 0.5, ease: "power3.out" },
          "-=0.2",
        );
      }

      tl.to({}, { duration: effectiveHoldMs / 1000 })
        .to(cardRef.current, { scale: 0.9, autoAlpha: 0, duration: 0.35, ease: "power2.in" })
        .to(rootRef.current, { autoAlpha: 0, duration: 0.25, ease: "power2.in" }, "<");
    });

    return () => ctx.revert();
  }, [photo, effectiveHoldMs]);

  if (!photo) return null;

  return (
    <div
      ref={rootRef}
      className="pointer-events-none fixed inset-0 z-50 flex items-center justify-center bg-black/55 px-6 backdrop-blur-[2px]"
      role="dialog"
      aria-label="New photo"
    >
      <div
        ref={cardRef}
        className="pointer-events-auto flex w-full max-w-[min(440px,90vw)] flex-col items-center"
      >
        <div
          ref={frameRef}
          className="w-full overflow-hidden ring-2 ring-white/35"
          style={{ borderRadius, aspectRatio: "1 / 1" }}
        >
          <img
            src={photo.url}
            alt={photo.displayName || "New photo"}
            className="h-full w-full object-cover"
          />
        </div>

        <div className="mt-5 flex w-full flex-col items-center px-1 text-center">
          {photo.displayName ? (
            <p
              ref={nameRef}
              className="text-[2.1rem] font-bold leading-tight tracking-tight text-[var(--theme-card-text-color)] drop-shadow-md sm:text-[2.45rem]"
              style={{ fontFamily: "var(--theme-heading-font, inherit)" }}
            >
              {photo.displayName}
            </p>
          ) : null}

          {message ? (
            <blockquote ref={messageRef} className="relative mt-5 max-w-[24rem] px-6">
              <span
                aria-hidden
                className="pointer-events-none absolute -left-1 -top-4 select-none text-6xl font-serif leading-none text-[var(--theme-button-color)]/40"
              >
                “
              </span>
              <p
                className="text-[1.15rem] italic leading-relaxed text-[var(--theme-card-text-color)]/90 sm:text-[1.3rem]"
                style={{ fontFamily: "var(--theme-body-font, Georgia, 'Times New Roman', serif)" }}
              >
                {message}
              </p>
              <span
                aria-hidden
                className="pointer-events-none absolute -bottom-6 right-0 select-none text-6xl font-serif leading-none text-[var(--theme-button-color)]/40"
              >
                ”
              </span>
            </blockquote>
          ) : null}
        </div>
      </div>
    </div>
  );
}