"use client";

import { useEffect, useId, useRef, useSyncExternalStore } from "react";
import { createPortal } from "react-dom";
import { motion } from "framer-motion";
import { Phone, X, ArrowRight } from "lucide-react";
import { SiViber, SiWhatsapp } from "react-icons/si";
import type { Dictionary } from "@/lib/dictionaries";

interface PhoneChoiceModalProps {
  open: boolean;
  number: string;
  dict: Dictionary;
  onClose: () => void;
}

// SSR-safe client gate for the portal: false on the server, true after
// hydration — no effect, no setState, no hydration mismatch.
const emptySubscribe = () => () => {};
function useIsClient() {
  return useSyncExternalStore(emptySubscribe, () => true, () => false);
}

export default function PhoneChoiceModal({
  open,
  number,
  dict,
  onClose,
}: PhoneChoiceModalProps) {
  const mounted = useIsClient();
  const t = dict.contactPage;
  const titleId = useId();
  const panelRef = useRef<HTMLDivElement>(null);
  const restoreFocusRef = useRef<HTMLElement | null>(null);

  // E.164 for the app links; the display string keeps its spaces.
  const e164 = number.replace(/[^\d+]/g, "");
  const bare = e164.replace(/^\+/, "");

  const options = [
    {
      icon: Phone,
      label: t.phoneCall,
      hint: t.phoneCallHint,
      href: `tel:${e164}`,
      tint: "text-purple-300 border-purple-400/25 bg-purple-500/10",
    },
    {
      icon: SiWhatsapp,
      label: "WhatsApp",
      hint: t.phoneWhatsAppHint,
      href: `https://wa.me/${bare}`,
      tint: "text-emerald-300 border-emerald-400/25 bg-emerald-500/10",
    },
    {
      icon: SiViber,
      label: "Viber",
      hint: t.phoneViberHint,
      // Only resolves when the Viber app is installed — it has no web fallback.
      href: `viber://chat?number=${encodeURIComponent(e164)}`,
      tint: "text-violet-300 border-violet-400/25 bg-violet-500/10",
    },
  ];

  // Body scroll lock with scrollbar-width compensation (prevents layout shift).
  useEffect(() => {
    if (!open) return;
    const scrollbarWidth =
      window.innerWidth - document.documentElement.clientWidth;
    const prevOverflow = document.body.style.overflow;
    const prevPadding = document.body.style.paddingRight;
    document.body.style.overflow = "hidden";
    if (scrollbarWidth > 0)
      document.body.style.paddingRight = `${scrollbarWidth}px`;
    return () => {
      document.body.style.overflow = prevOverflow;
      document.body.style.paddingRight = prevPadding;
    };
  }, [open]);

  // Focus management: trap Tab, close on Escape, restore focus on close.
  useEffect(() => {
    if (!open) return;
    restoreFocusRef.current = document.activeElement as HTMLElement | null;
    panelRef.current?.focus();

    const onKey = (e: KeyboardEvent) => {
      if (e.key === "Escape") {
        onClose();
        return;
      }
      if (e.key !== "Tab" || !panelRef.current) return;
      const focusables = panelRef.current.querySelectorAll<HTMLElement>(
        'a[href], button:not([disabled]), [tabindex]:not([tabindex="-1"])',
      );
      if (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", onKey);
    return () => {
      document.removeEventListener("keydown", onKey);
      restoreFocusRef.current?.focus?.();
    };
  }, [open, onClose]);

  if (!mounted) return null;

  const overlay = (
    // Static container — never animates opacity, so the backdrop-filter below
    // keeps its own compositing layer (see ProjectModal for the why).
    <div
      className="fixed inset-0 z-[80] flex items-center justify-center p-4"
      aria-hidden={!open}
      style={{ pointerEvents: open ? "auto" : "none" }}
    >
      <motion.div
        className="absolute inset-0 bg-black/75 backdrop-blur-sm"
        initial={false}
        animate={{ opacity: open ? 1 : 0 }}
        transition={{ duration: 0.2, ease: "easeOut" }}
        style={{ willChange: "opacity", transform: "translateZ(0)" }}
        onClick={onClose}
      />

      <motion.div
        ref={panelRef}
        role="dialog"
        aria-modal="true"
        aria-labelledby={titleId}
        tabIndex={-1}
        initial={false}
        animate={{
          opacity: open ? 1 : 0,
          scale: open ? 1 : 0.96,
          y: open ? 0 : 8,
        }}
        transition={{ duration: 0.22, ease: [0.16, 1, 0.3, 1] }}
        className="relative w-full max-w-sm rounded-2xl border border-white/10 bg-[#0f0d1a] p-6 shadow-2xl outline-none"
        onClick={(e) => e.stopPropagation()}
      >
        <button
          type="button"
          onClick={onClose}
          className="absolute right-4 top-4 flex h-8 w-8 items-center justify-center rounded-lg bg-white/5 text-text-secondary transition-colors hover:bg-white/10 hover:text-text-primary"
          aria-label={t.phoneModalClose}
        >
          <X className="h-4 w-4" />
        </button>

        <h3
          id={titleId}
          className="pr-10 font-display text-lg font-medium text-text-primary"
        >
          {t.phoneModalTitle}
        </h3>
        <p className="mt-1 font-mono text-xs tracking-tight text-purple-300">
          {number}
        </p>
        <p className="mt-3 text-sm text-text-secondary">
          {t.phoneModalSubtitle}
        </p>

        <div className="mt-5 space-y-2">
          {options.map((option) => (
            <a
              key={option.label}
              href={option.href}
              target={option.href.startsWith("http") ? "_blank" : undefined}
              rel={
                option.href.startsWith("http")
                  ? "noopener noreferrer"
                  : undefined
              }
              onClick={onClose}
              className="group flex items-center gap-4 rounded-xl border border-border/50 bg-surface/40 px-4 py-3 transition-all hover:border-purple-400/40 hover:bg-purple-500/5"
            >
              <span
                className={`flex h-10 w-10 shrink-0 items-center justify-center rounded-xl border ${option.tint}`}
              >
                <option.icon className="h-4 w-4" strokeWidth={1.5} />
              </span>
              <span className="min-w-0 flex-1">
                <span className="block text-sm font-medium text-text-primary">
                  {option.label}
                </span>
                <span className="block truncate text-xs text-text-secondary">
                  {option.hint}
                </span>
              </span>
              <ArrowRight
                className="h-4 w-4 shrink-0 text-text-secondary transition-transform group-hover:translate-x-0.5"
                strokeWidth={1.5}
              />
            </a>
          ))}
        </div>
      </motion.div>
    </div>
  );

  return createPortal(overlay, document.body);
}