"use client";

import Link from "next/link";
import { usePathname } from "next/navigation";
import { CloudSun, Droplets, TriangleAlert } from "lucide-react";
import { NAV_ITEMS } from "@/lib/constants";
import { cn } from "@/lib/utils";
import { InstallPWAButton } from "@/components/ui/install-pwa-button";
import { ThemeToggle } from "@/components/ui/theme-toggle";
import { LanguageToggle } from "@/components/ui/language-toggle";
import { useI18n } from "@/lib/i18n";

const icons = [CloudSun, TriangleAlert, Droplets];

export function AppShell({ children }: { children: React.ReactNode }) {
  const pathname = usePathname();
  const { t } = useI18n();
  return (
    <div className="min-h-screen overflow-x-hidden bg-background">
      <header className="sticky top-0 z-40 border-b border-border/70 bg-surface">
        <div className="mx-auto flex max-w-7xl items-center justify-between px-4 py-3 sm:px-6 lg:px-8">
          <Link href="/" className="text-2xl font-semibold tracking-[-0.09em] text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent">
            wtr<span className="text-accent">.</span>
          </Link>
          <nav aria-label={t("nav.main")} className="hidden items-center gap-1 md:flex">
            {NAV_ITEMS.map((item) => {
              const active = item.href === "/" ? pathname === "/" : pathname.startsWith(item.href);
              return (
                <Link key={item.href} href={item.href} className={cn("rounded-control px-4 py-2 text-sm font-medium transition focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent", active ? "bg-foreground text-background shadow-soft" : "text-muted hover:bg-surface-muted/70")}>
                  {t(item.labelKey)}
                </Link>
              );
            })}
          </nav>
          <div className="flex items-center gap-2">
            <InstallPWAButton />
            <LanguageToggle />
            <ThemeToggle />
          </div>
        </div>
      </header>
      <main className="mx-auto max-w-7xl px-4 pb-28 pt-5 sm:px-6 sm:pt-8 lg:px-8">{children}</main>
      <nav aria-label={t("nav.mobile")} className="fixed inset-x-3 bottom-3 z-50 flex justify-around rounded-panel border border-border/70 bg-surface p-1.5 shadow-card md:hidden">
        {NAV_ITEMS.map((item, index) => {
          const Icon = icons[index];
          const active = item.href === "/" ? pathname === "/" : pathname.startsWith(item.href);
          return (
            <Link key={item.href} href={item.href} className={cn("flex min-w-[5rem] flex-col items-center gap-1 rounded-card px-3 py-2 text-[0.68rem] font-medium transition focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent", active ? "bg-foreground text-background" : "text-muted")}>
              <Icon className="size-4" />
              {t(item.labelKey)}
            </Link>
          );
        })}
      </nav>
    </div>
  );
}