"use client";

import { useEffect, useRef } from "react";
import Image from "next/image";
import { AnimatePresence, motion } from "motion/react";

const features = [
  {
    icon: "/icon-sparkle-wrapper.svg",
    title: "7 Tage. Ein Fokus.",
    desc: "Tägliche Impulse für mehr Klarheit und weniger Reibung.",
  },
  {
    icon: "/icon-checklist.png",
    title: "Praktisch & umsetzbar.",
    desc: "Direkt anwendbare Methoden für deinen Alltag.",
  },
  {
    icon: "/icon-heart.png",
    title: "Kein Spam. Versprochen.",
    desc: "Nur wertvolle Inhalte, wenn du sie brauchst.",
  },
];

/**
 * The Navbar's "Newsletter" CTA opens this modal rather than navigating —
 * matches the original Figma prototype (Newsletter-Button → Overlay
 * newsletter-overlay), unlike the Werkzeuge "Impulse & Tipps" card's
 * "Anmelden" link, which goes to the full /newsletter detail page instead.
 * Different entry points, different weight: a quick-access nav CTA gets a
 * lightweight in-place signup, a content card gets the full page.
 */
export function NewsletterModal({ open, onClose }: { open: boolean; onClose: () => void }) {
  const dialogRef = useRef<HTMLDivElement>(null);
  const closeButtonRef = useRef<HTMLButtonElement>(null);

  // Body scroll lock while open.
  useEffect(() => {
    if (!open) return;
    const prevOverflow = document.body.style.overflow;
    document.body.style.overflow = "hidden";
    return () => {
      document.body.style.overflow = prevOverflow;
    };
  }, [open]);

  // Focus management: move focus into the modal on open, trap Tab within
  // it, close + return focus on Escape — same pattern as the Navbar's
  // mobile drawer.
  useEffect(() => {
    if (!open) return;

    closeButtonRef.current?.focus();

    const onKeyDown = (e: KeyboardEvent) => {
      if (e.key === "Escape") {
        e.preventDefault();
        onClose();
        return;
      }
      if (e.key !== "Tab") return;
      const focusables = dialogRef.current?.querySelectorAll<HTMLElement>(
        'a[href], button:not([disabled]), input:not([disabled])'
      );
      if (!focusables || focusables.length === 0) return;
      const first = focusables[0];
      const last = focusables[focusables.length - 1];
      if (e.shiftKey && document.activeElement === first) {
        e.preventDefault();
        last.focus();
      } else if (!e.shiftKey && document.activeElement === last) {
        e.preventDefault();
        first.focus();
      }
    };

    document.addEventListener("keydown", onKeyDown);
    return () => document.removeEventListener("keydown", onKeyDown);
  }, [open, onClose]);

  return (
    // AnimatePresence, not a plain `if (!open) return null` — that would
    // unmount the modal instantly on close with no way to play an exit
    // animation first. Keeping it mounted (conditionally rendering the
    // child) lets Framer Motion finish the fade-out before removing it.
    <AnimatePresence>
      {open && (
        <motion.div
          className="fixed inset-0 z-[60] flex items-center justify-center p-4 md:p-8 bg-[rgba(134,134,134,0.9)]"
          initial={{ opacity: 0 }}
          animate={{ opacity: 1 }}
          exit={{ opacity: 0 }}
          transition={{ duration: 0.25, ease: "easeOut" }}
          onClick={(e) => {
            if (e.target === e.currentTarget) onClose();
          }}
        >
          <motion.div
            ref={dialogRef}
            role="dialog"
            aria-modal="true"
            aria-labelledby="newsletter-modal-heading"
            initial={{ opacity: 0, y: 16, scale: 0.97 }}
            animate={{ opacity: 1, y: 0, scale: 1 }}
            exit={{ opacity: 0, y: 16, scale: 0.97 }}
            transition={{ duration: 0.3, ease: [0.22, 1, 0.36, 1] }}
            className="relative bg-bg-base rounded-md overflow-hidden w-full max-w-[75rem] max-h-[90vh] overflow-y-auto"
          >
        <button
          ref={closeButtonRef}
          type="button"
          onClick={onClose}
          aria-label="Schließen"
          className="absolute top-6 right-6 z-10 size-6 flex items-center justify-center active:scale-90 transition-transform"
        >
          <img alt="" src="/icon-close.png" className="size-full object-contain" />
        </button>

        {/* modal-top: photo + copy/form, stacked below md */}
        <div className="flex flex-col md:flex-row items-stretch border-b border-border">
          <div className="relative w-full md:flex-1 aspect-[4/3] md:aspect-auto">
            <Image
              src="/newsletter-modal-photo.jpg"
              alt="Notizbuch mit Kaffee und Stift"
              fill
              sizes="(min-width: 768px) 50vw, 100vw"
              className="object-cover"
            />
          </div>

          <div className="flex flex-col gap-6 items-start justify-center flex-1 min-w-0 px-8 py-10 md:px-[4.6875rem] md:py-[6.25rem]">
            {/* -scale-y-100 is required, not just -rotate-4 — the SVG
                itself is authored upside-down (matches how Newsletter.tsx
                uses this exact same asset); without it the icon renders
                flipped. */}
            <div className="w-16 h-14 -rotate-4 -scale-y-100">
              <img alt="" src="/newsletter-icon.svg" className="w-full h-full" />
            </div>

            <p
              id="newsletter-modal-heading"
              className="font-semibold text-h-feature text-text-primary leading-[1.15]"
              style={{ fontFamily: "var(--font-lora)" }}
            >
              Starte mit einer Woche voller Klarheit
            </p>

            <p className="text-body text-text-primary">
              Melde dich zum Newsletter an und erhalte die 7-Tage-Challenge, mit der du durch mehr Struktur weniger Stress spürst.
            </p>

            <form className="flex flex-col gap-5 items-start w-full">
              <div className="flex flex-col gap-4 items-start w-full">
                <input
                  type="email"
                  placeholder="Deine E-Mail-Adresse"
                  className="w-full bg-bg-white border border-border rounded-sm px-6 py-3 text-body text-text-muted font-normal outline-none focus:border-brand transition-colors"
                />
                <button
                  type="submit"
                  className="w-full bg-brand rounded-sm px-7 py-[0.875rem] font-bold text-h4 text-text-primary text-left hover:bg-brand-hover active:scale-[0.97] transition-all focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-brand focus-visible:ring-offset-2 focus-visible:ring-offset-bg-base"
                >
                  Jetzt anmelden
                </button>
              </div>
              <label className="flex gap-2 items-center w-full cursor-pointer">
                <input
                  type="checkbox"
                  className="size-4 shrink-0 rounded-xs border border-border accent-brand"
                />
                <span className="text-label text-text-primary">
                  Ich akzeptiere die Datenschutzerklärung.
                </span>
              </label>
            </form>
          </div>
        </div>

        {/* modal-bottom: 3 feature cards. Figma's export had items-end on
            this row, but that's a byproduct of nested -scale-y-100
            flip-wrappers Figma uses for baseline-grid tricks (visually
            cancels out to top-alignment in the actual design) — taken
            literally it bottom-aligned the icon with the last line of
            description text instead of the title, which read as broken.
            items-start + a fixed icon bounding box (icons have different
            native proportions, e.g. the sparkle glyph isn't square) fixes
            it without needing the flip trick. */}
        <div className="flex flex-col md:flex-row items-start px-8 md:px-20 py-6 md:py-9 gap-8 md:gap-6">
          {features.map((f) => (
            <div key={f.title} className="flex-1 flex gap-6 items-start w-full">
              <div className="h-10 w-10 shrink-0 flex items-center justify-center">
                <img alt="" src={f.icon} className="max-h-10 max-w-10 object-contain" />
              </div>
              <div className="flex flex-col gap-3 items-start flex-1 min-w-0">
                <p
                  className="font-semibold text-h-small text-text-primary w-full"
                  style={{ fontFamily: "var(--font-lora)" }}
                >
                  {f.title}
                </p>
                <p className="text-body text-text-primary w-full">{f.desc}</p>
              </div>
            </div>
          ))}
          </div>
          </motion.div>
        </motion.div>
      )}
    </AnimatePresence>
  );
}