"use client";

import { AnimatePresence, motion, useReducedMotion } from "framer-motion";
import { Settings, ShieldCheck } from "lucide-react";
import Image from "next/image";
import Link from "next/link";
import { usePathname } from "next/navigation";
import { useLocale, useTranslations } from "next-intl";
import { useState, type ReactNode } from "react";

import { LocaleToggle } from "@/components/layout/locale-toggle";
import { SoundToggle } from "@/components/sound-toggle";
import { ThemeToggle } from "@/components/theme-toggle";
import { Dock, DockIcon } from "@/components/ui/dock";
import { buildAdminUrl } from "@/lib/admin-routing";
import { getLocalizedPath, stripLocalePrefix, type AppLocale } from "@/lib/locale";
import { cn } from "@/lib/utils";

type SiteDockProps = {
  defaultLocale: AppLocale;
  /**
   * Server-computed via `isSuperAdmin()` in the parent layout. This client
   * component only decides whether to *render* the Admin shortcut — it performs
   * no auth check and grants no access; the real guard lives server-side on
   * each admin page/action.
   */
  isSuperAdmin?: boolean;
};

type NavKey = "home" | "about" | "portfolio" | "products" | "contact";

type NavItem = {
  key: NavKey;
  path: string;
  disabled?: boolean;
};

const navItems: NavItem[] = [
  { key: "home", path: "" },
  { key: "about", path: "/about" },
  { key: "portfolio", path: "/portfolio" },
  { key: "products", path: "/products", disabled: true },
  { key: "contact", path: "/contact" },
];

// Graphite squircle matching the SVG page icons, used for the settings tile.
const controlTile =
  "group relative overflow-visible rounded-[26%] bg-gradient-to-b from-[#3f4551] to-[#191d24] shadow-[0_6px_14px_-6px_rgba(0,0,0,0.5)] ring-1 ring-white/10 transition-shadow duration-200 hover:shadow-[0_10px_22px_-8px_rgba(0,0,0,0.6)]";
// Glass pill used for each control that fans out along the arc.
const fanPill =
  "flex h-11 w-11 items-center justify-center rounded-full border border-transparent bg-background/90 text-foreground/85 shadow-panel backdrop-blur-chrome transition-colors hover:bg-accent hover:text-foreground";

// Radius (px) and opening angles of the arc the controls fan out along.
const ARC_RADIUS = 74;
const ARC_START = 46;
const ARC_END = 134;

function isNavItemActive(currentPath: string, itemPath: string) {
  if (itemPath === "/") {
    return currentPath === "/";
  }
  return currentPath === itemPath || currentPath.startsWith(`${itemPath}/`);
}

export function SiteDock({ defaultLocale, isSuperAdmin = false }: SiteDockProps) {
  const locale = useLocale();
  const pathname = usePathname();
  const t = useTranslations("navigation");
  const reducedMotion = useReducedMotion();
  const [settingsOpen, setSettingsOpen] = useState(false);

  const currentPath = stripLocalePrefix(pathname);
  const homeHref = getLocalizedPath(locale, "/", defaultLocale);

  const fanItems: ReactNode[] = [
    <SoundToggle
      key="sound"
      ariaLabel={t("soundMute")}
      mutedAriaLabel={t("soundUnmute")}
      variant="ghost"
      className={fanPill}
    />,
    <ThemeToggle key="theme" ariaLabel={t("themeToggle")} variant="ghost" className={fanPill} />,
    <LocaleToggle key="locale" locale={locale} defaultLocale={defaultLocale} className={cn(fanPill, "p-0")} />,
  ];

  if (isSuperAdmin) {
    fanItems.push(
      <a key="admin" href={buildAdminUrl("/")} aria-label="Open admin dashboard" className={fanPill}>
        <ShieldCheck className="h-[1.125rem] w-[1.125rem]" />
      </a>,
    );
  }

  const arcPosition = (index: number) => {
    const count = fanItems.length;
    const angle = count === 1 ? 90 : ARC_START + ((ARC_END - ARC_START) * index) / (count - 1);
    const radians = (angle * Math.PI) / 180;
    return { x: Math.cos(radians) * ARC_RADIUS, y: -Math.sin(radians) * ARC_RADIUS };
  };

  return (
    <>
      {/* click-away scrim (below the dock, above the page) */}
      {settingsOpen ? (
        <button
          type="button"
          aria-hidden
          tabIndex={-1}
          onClick={() => setSettingsOpen(false)}
          className="fixed inset-0 z-30 cursor-default bg-transparent"
        />
      ) : null}

      <div
        className="pointer-events-none fixed inset-x-0 bottom-0 z-40 flex justify-center px-4"
        style={{ paddingBottom: "calc(0.9rem + env(safe-area-inset-bottom, 0px))" }}
      >
        <Dock
          direction="bottom"
          iconSize={52}
          iconMagnification={90}
          iconDistance={160}
          className="pointer-events-auto h-[68px] gap-2.5 border-border/60 bg-background/70 shadow-panel"
        >
          {/* ── Logo (fixed src → no refresh flash) ── */}
          <DockIcon className="group relative overflow-visible rounded-[26%] bg-white shadow-[0_6px_14px_-6px_rgba(0,0,0,0.5)] ring-1 ring-black/10">
            <Link
              href={homeHref}
              aria-label="mohfarawati — Home"
              className="flex h-full w-full items-center justify-center rounded-[inherit]"
            >
              <Image
                src="/logos/light-primary.svg"
                alt="mohfarawati"
                width={104}
                height={104}
                sizes="104px"
                priority
                className="h-full w-full rounded-[inherit] object-contain"
              />
            </Link>
            <DockTip label="mohfarawati" />
          </DockIcon>

          <DockSeparator />

          {/* ── Pages ── */}
          {navItems.map(({ key, path, disabled }) => {
            const itemPath = path || "/";
            const isActive = isNavItemActive(currentPath, itemPath);
            const label = t(key);
            const src = `/dock/${key}${isActive ? "-active" : ""}.svg`;

            const icon = (
              <Image
                src={src}
                alt={label}
                width={104}
                height={104}
                sizes="104px"
                className={cn("h-full w-full rounded-[inherit] object-contain", disabled && "opacity-55")}
              />
            );

            return (
              <DockIcon
                key={key}
                className={cn(
                  "group relative overflow-visible rounded-[26%] transition-shadow duration-200",
                  isActive
                    ? "shadow-[0_12px_26px_-8px_hsl(var(--primary)/0.65)]"
                    : "shadow-[0_6px_14px_-6px_rgba(0,0,0,0.5)] hover:shadow-[0_10px_22px_-8px_rgba(0,0,0,0.6)]",
                )}
              >
                {disabled ? (
                  <span
                    aria-disabled="true"
                    className="flex h-full w-full cursor-not-allowed items-center justify-center rounded-[inherit]"
                  >
                    {icon}
                  </span>
                ) : (
                  <Link
                    href={getLocalizedPath(locale, itemPath, defaultLocale)}
                    aria-label={label}
                    aria-current={isActive ? "page" : undefined}
                    className="flex h-full w-full items-center justify-center rounded-[inherit]"
                  >
                    {icon}
                  </Link>
                )}
                <DockTip label={label} soon={disabled ? t("soon") : undefined} />
              </DockIcon>
            );
          })}

          <DockSeparator />

          {/* ── Settings — press to fan the controls out along an arc ── */}
          <DockIcon className={controlTile}>
            <TileGloss />

            <AnimatePresence>
              {settingsOpen
                ? fanItems.map((node, index) => {
                    const { x, y } = arcPosition(index);
                    return (
                      <motion.div
                        key={index}
                        className="absolute inset-0 z-10 flex items-center justify-center"
                        initial={reducedMotion ? { opacity: 0 } : { opacity: 0, x: 0, y: 0, scale: 0.4 }}
                        animate={reducedMotion ? { opacity: 1 } : { opacity: 1, x, y, scale: 1 }}
                        exit={reducedMotion ? { opacity: 0 } : { opacity: 0, x: 0, y: 0, scale: 0.4 }}
                        transition={
                          reducedMotion
                            ? { duration: 0 }
                            : { type: "spring", stiffness: 480, damping: 26, delay: index * 0.035 }
                        }
                      >
                        {node}
                      </motion.div>
                    );
                  })
                : null}
            </AnimatePresence>

            <button
              type="button"
              onClick={() => setSettingsOpen((value) => !value)}
              aria-expanded={settingsOpen}
              aria-label={settingsOpen ? t("closeMenu") : t("openMenu")}
              className="relative z-20 flex h-full w-full items-center justify-center rounded-[inherit] text-white hover:bg-white/10"
            >
              <motion.span
                animate={{ rotate: settingsOpen ? 90 : 0 }}
                transition={reducedMotion ? { duration: 0 } : { type: "spring", stiffness: 400, damping: 22 }}
                className="flex items-center justify-center"
              >
                <Settings className="h-[46%] w-[46%]" />
              </motion.span>
            </button>

            {settingsOpen ? null : <DockTip label={t("themeToggle")} />}
          </DockIcon>
        </Dock>
      </div>
    </>
  );
}

function DockSeparator() {
  return <div className="mx-0.5 h-9 w-px self-center bg-border/70" aria-hidden />;
}

function TileGloss() {
  return (
    <span
      aria-hidden
      className="pointer-events-none absolute inset-x-0 top-0 h-1/2 rounded-t-[26%] bg-gradient-to-b from-white/25 to-transparent"
    />
  );
}

function DockTip({ label, soon }: { label: string; soon?: string }) {
  return (
    <span
      role="tooltip"
      className="pointer-events-none absolute bottom-[calc(100%+0.75rem)] left-1/2 -translate-x-1/2 translate-y-1 whitespace-nowrap rounded-lg border border-border/60 bg-background/90 px-2.5 py-1 text-xs font-semibold text-foreground opacity-0 shadow-md backdrop-blur-chrome transition-all duration-150 group-hover:translate-y-0 group-hover:opacity-100"
    >
      {label}
      {soon ? <span className="ms-1.5 text-[0.625rem] tracking-wide text-primary">{soon}</span> : null}
    </span>
  );
}