/* ============================================================
   BOTTOM NAV — Luxsin X9 Controller (Mobile)
   Design: iOS/Android App-style bottom tab bar
   5 tabs — labels from locales/bottomNav, language = deviceState.language (同系统页)
   - 社区：移动端进入 /community 引导复制链接；桌面（lg+）点击仍 window.open 论坛
   - Active tab: cyan icon + top indicator bar
   - Inactive: muted icon + label
   ============================================================ */
import { useDevice } from "@/contexts/DeviceContext";
import { cn } from "@/lib/utils";
import { readAndClearAiSplitRestorePath, useAIDrawer } from "@/contexts/AIDrawerContext";
import { useIsLgUp } from "@/hooks/useIsLgUp";
import localeZh from "@/locales/data-zh.json";
import localeEn from "@/locales/data-en.json";
import { resolveLocalePack } from "@/locales/resolveLocale";
import {
  Activity,
  Bot,
  Home,
  MessageSquare,
  Sliders,
} from "lucide-react";
import { Link, useLocation } from "wouter";
import { useMemo } from "react";
import { bottomNavInnerClass, bottomNavOuterClass } from "@/lib/appShell";

type BottomNavLocale = NonNullable<(typeof localeZh)["bottomNav"]>;

interface NavItem {
  path: string;
  icon: React.ComponentType<{ size?: number; className?: string }>;
  labelKey: keyof BottomNavLocale;
}

const FORUM_URL = "https://forum.zidoo.tv/index.php";

const NAV_ITEMS: NavItem[] = [
  { path: "/community", icon: MessageSquare, labelKey: "community" },
  { path: "/eq", icon: Sliders, labelKey: "hpEq" },
  { path: "/", icon: Home, labelKey: "home" },
  { path: "/effects", icon: Activity, labelKey: "effects" },
  { path: "/ai", icon: Bot, labelKey: "myAi" },
];

export default function BottomNav() {
  const [location, setLocation] = useLocation();
  const isLgUp = useIsLgUp();
  const { open: aiDrawerOpen, setOpen: setAiDrawerOpen } = useAIDrawer();
  const { deviceState } = useDevice();

  const navText = useMemo((): BottomNavLocale => {
    const pack = resolveLocalePack(deviceState?.language);
    return (pack.bottomNav ?? localeEn.bottomNav) as BottomNavLocale;
  }, [deviceState?.language]);

  return (
    <nav
      className={bottomNavOuterClass}
    >
      <div
        className={bottomNavInnerClass}
        style={{
          background: "rgba(10, 10, 12, 0.96)",
          backdropFilter: "blur(40px) saturate(200%)",
          WebkitBackdropFilter: "blur(40px) saturate(200%)",
          borderTop: "0.5px solid rgba(255,255,255,0.1)",
          boxShadow: "0 -1px 0 rgba(0,255,246,0.05)",
          paddingBottom: "env(safe-area-inset-bottom, 8px)",
        }}
      >
      <div className="flex items-stretch justify-around">
        {NAV_ITEMS.map((item) => {
          const isActive =
            item.path === "/ai"
              ? location === "/ai" || (isLgUp && aiDrawerOpen)
              : location === item.path ||
                (item.path === "/" && location === "/") ||
                (item.path !== "/" && location.startsWith(item.path));
          const Icon = item.icon;

          const inner = (
            <div className="flex flex-col items-center justify-center relative pt-2.5 pb-1.5 px-3">
                {/* Active indicator bar */}
                <div
                  className="absolute top-0 left-1/2 -translate-x-1/2 rounded-b-full transition-all duration-300"
                  style={{
                    width: isActive ? 24 : 0,
                    height: 2.5,
                    background: "#00FFF6",
                    boxShadow: isActive ? "0 0 8px rgba(0,255,246,0.9)" : "none",
                    opacity: isActive ? 1 : 0,
                    transition: "width 0.25s cubic-bezier(0.34,1.56,0.64,1), opacity 0.2s ease",
                  }}
                />

                {/* Icon */}
                <div
                  className="flex items-center justify-center rounded-[12px] transition-all duration-200"
                  style={{
                    width: 38,
                    height: 32,
                    background: isActive ? "rgba(0,255,246,0.1)" : "transparent",
                  }}
                >
                  <Icon
                    size={isActive ? 20 : 19}
                    className={cn(
                      "transition-all duration-200",
                      isActive ? "text-[#00FFF6]" : "text-white/30"
                    )}
                  />
                </div>

                {/* Label */}
                <span
                  className="mt-0.5 transition-all duration-200 leading-none"
                  style={{
                    fontFamily: "-apple-system, 'SF Pro Text', sans-serif",
                    fontSize: 10,
                    fontWeight: isActive ? 600 : 400,
                    color: isActive ? "#00FFF6" : "rgba(255,255,255,0.28)",
                    textShadow: isActive ? "0 0 8px rgba(0,255,246,0.5)" : "none",
                  }}
                >
                  {navText[item.labelKey]}
                </span>
              </div>
          );

          if (item.path === "/community") {
            if (isLgUp) {
              return (
                <button
                  key={item.path}
                  type="button"
                  className="cursor-pointer border-0 bg-transparent p-0 text-inherit outline-none focus-visible:ring-2 focus-visible:ring-[#00FFF6]/40 focus-visible:ring-offset-2 focus-visible:ring-offset-[rgba(10,10,12,0.96)]"
                  onClick={() => window.open(FORUM_URL, "_blank", "noopener,noreferrer")}
                >
                  {inner}
                </button>
              );
            }
            return (
              <Link key={item.path} href={item.path}>
                {inner}
              </Link>
            );
          }

          if (item.path === "/ai") {
            if (!isLgUp) {
              return (
                <Link key={item.path} href={item.path}>
                  {inner}
                </Link>
              );
            }
            return (
              <div
                key={item.path}
                role="button"
                tabIndex={0}
                className="cursor-pointer select-none"
                onClick={() => {
                  if (location === "/ai") {
                    const path = readAndClearAiSplitRestorePath();
                    setLocation(path);
                    setAiDrawerOpen(true);
                    return;
                  }
                  setAiDrawerOpen((o) => !o);
                }}
                onKeyDown={(e) => {
                  if (e.key !== "Enter" && e.key !== " ") return;
                  e.preventDefault();
                  if (location === "/ai") {
                    const path = readAndClearAiSplitRestorePath();
                    setLocation(path);
                    setAiDrawerOpen(true);
                    return;
                  }
                  setAiDrawerOpen((o) => !o);
                }}
              >
                {inner}
              </div>
            );
          }

          return (
            <Link key={item.path} href={item.path}>
              {inner}
            </Link>
          );
        })}
      </div>
      </div>
    </nav>
  );
}