'use client';

import { useEffect, useRef, useState } from 'react';
import { RiCloseLine, RiMenuLine } from '@remixicon/react';

import { Brand } from '@/components/shared/brand';
import {
  Sheet,
  SheetClose,
  SheetContent,
  SheetDescription,
  SheetTitle,
  SheetTrigger,
} from '@/components/ui/sheet';
import { siteConfig, type NavigationItem } from '@/lib/site';

export function MobileNavigation({ items }: { items: NavigationItem[] }) {
  const [open, setOpen] = useState(false);
  const navigating = useRef(false);

  useEffect(() => {
    const desktop = window.matchMedia('(min-width: 768px)');
    const closeOnDesktop = () => {
      if (desktop.matches) setOpen(false);
    };

    desktop.addEventListener('change', closeOnDesktop);
    return () => desktop.removeEventListener('change', closeOnDesktop);
  }, []);

  return (
    <Sheet open={open} onOpenChange={setOpen}>
      <SheetTrigger asChild>
        <button
          type="button"
          aria-label="Open navigation menu"
          className="inline-flex size-10 items-center justify-center rounded-md text-foreground/70 transition-colors hover:bg-foreground/5 hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-foreground/30 md:hidden"
        >
          <RiMenuLine className="size-5" aria-hidden="true" />
        </button>
      </SheetTrigger>

      <SheetContent
        side="top"
        showCloseButton={false}
        overlayClassName="z-[60] bg-black/45 duration-300 supports-backdrop-filter:backdrop-blur-md md:hidden"
        className="z-[61] max-h-dvh w-full gap-0 overflow-hidden rounded-none border-border bg-background text-foreground outline-none duration-300 data-[side=top]:data-open:slide-in-from-top data-[side=top]:data-closed:slide-out-to-top md:hidden"
        onCloseAutoFocus={(event) => {
          // Let the anchor move focus to its section without the trigger
          // interrupting the page's smooth scroll when the sheet closes.
          if (navigating.current) event.preventDefault();
          navigating.current = false;
        }}
      >
        <div className="flex h-16 shrink-0 items-center justify-between border-b border-border px-6">
          <Brand />
          <SheetClose asChild>
            <button
              type="button"
              aria-label="Close navigation menu"
              className="inline-flex size-10 items-center justify-center rounded-md text-foreground/60 transition-colors hover:bg-foreground/5 hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-foreground/30"
            >
              <RiCloseLine className="size-5" aria-hidden="true" />
            </button>
          </SheetClose>
        </div>

        <div className="min-h-0 overflow-y-auto overscroll-contain p-3">
          <SheetTitle className="px-3 pb-2 pt-3 text-[10px] font-medium uppercase tracking-[0.2em] text-foreground/40">
            Explore {siteConfig.name}
          </SheetTitle>
          <SheetDescription className="sr-only">
            Explore our products, solutions, resources, documentation, and pricing.
          </SheetDescription>
          <nav aria-label="Mobile navigation">
            <ul className="space-y-1">
              {items.map(({ label, href, description }) => (
                <li key={label}>
                  <SheetClose asChild>
                    <a
                      href={href}
                      onClick={() => {
                        navigating.current = true;
                      }}
                      className="flex items-center rounded-xl px-3 py-3 transition-colors hover:bg-foreground/5 focus-visible:bg-foreground/5 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-foreground/30"
                    >
                      <span className="min-w-0">
                        <span className="block text-xl font-medium tracking-tight">
                          {label}
                        </span>
                        <span className="mt-0.5 block text-xs leading-5 text-foreground/45">
                          {description}
                        </span>
                      </span>
                    </a>
                  </SheetClose>
                </li>
              ))}
            </ul>
          </nav>
        </div>

        <div className="shrink-0 space-y-2 border-t border-border bg-foreground/[0.02] p-5">
          <SheetClose asChild>
            <a
              href={siteConfig.links.signup}
              onClick={() => {
                navigating.current = true;
              }}
              className="flex h-12 items-center justify-center rounded-full bg-foreground px-4 text-sm font-medium text-background transition-colors hover:bg-foreground/90 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-foreground/30 focus-visible:ring-offset-2 focus-visible:ring-offset-background"
            >
              Sign Up
            </a>
          </SheetClose>
          <SheetClose asChild>
            <a
              href={siteConfig.links.login}
              onClick={() => {
                navigating.current = true;
              }}
              className="flex h-12 items-center justify-center rounded-full border border-border px-4 text-sm font-medium text-foreground/70 transition-colors hover:bg-foreground/5 hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-foreground/30"
            >
              Log In
            </a>
          </SheetClose>
        </div>
      </SheetContent>
    </Sheet>
  );
}