"use client"

import { useEffect, useRef, useState } from "react"
import { RiArrowRightLine, RiCloseLine, RiMenu3Line } from "@remixicon/react"
import { Dialog as DialogPrimitive } from "radix-ui"

import { Brand } from "@/components/shared/brand"
import {
  Dialog,
  DialogClose,
  DialogDescription,
  DialogOverlay,
  DialogPortal,
  DialogTitle,
  DialogTrigger,
} from "@/components/ui/dialog"

type NavigationItem = {
  label: string
  href: string
  description: string
}

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 (
    <Dialog open={open} onOpenChange={setOpen}>
      <DialogTrigger asChild>
        <button
          type="button"
          aria-label="Open navigation menu"
          className="inline-flex size-11 items-center justify-center rounded-sm border bg-background/80 text-foreground transition-colors hover:border-blue-500/40 hover:bg-blue-600/10 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring md:hidden"
        >
          <RiMenu3Line className="size-5" aria-hidden="true" />
        </button>
      </DialogTrigger>

      <DialogPortal>
        <DialogOverlay className="z-[60] bg-black/45 duration-200 supports-backdrop-filter:backdrop-blur-md md:hidden" />
        <DialogPrimitive.Content
          className="fixed inset-x-3 top-3 z-[61] mx-auto flex max-h-[calc(100dvh-1.5rem)] max-w-lg flex-col overflow-hidden rounded-2xl border bg-background text-foreground shadow-[0_24px_100px_rgba(0,0,0,.35)] outline-none duration-200 data-open:animate-in data-open:fade-in-0 data-open:slide-in-from-top-4 data-closed:animate-out data-closed:fade-out-0 data-closed:slide-out-to-top-4 md:hidden"
          onCloseAutoFocus={(event) => {
            // Let the anchor move focus to its section without the trigger
            // interrupting the page's smooth scroll when the dialog closes.
            if (navigating.current) event.preventDefault()
            navigating.current = false
          }}
        >
          <div className="flex shrink-0 items-center justify-between border-b bg-linear-to-r from-blue-600/10 via-blue-600/5 to-transparent px-5 py-3">
            <Brand />
            <DialogClose asChild>
              <button
                type="button"
                aria-label="Close navigation menu"
                className="inline-flex size-11 items-center justify-center rounded-full border bg-background/70 text-muted-foreground transition-colors hover:bg-muted hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring"
              >
                <RiCloseLine className="size-5" aria-hidden="true" />
              </button>
            </DialogClose>
          </div>

          <div className="min-h-0 overflow-y-auto overscroll-contain p-3">
            <DialogTitle className="px-3 pb-2 pt-3 font-mono text-[10px] font-medium tracking-[0.18em] text-muted-foreground uppercase">
              Explore Vertex
            </DialogTitle>
            <DialogDescription className="sr-only">
              Explore our products, models, features, pricing, and developer documentation.
            </DialogDescription>
            <nav aria-label="Mobile navigation">
              <ul className="space-y-1">
                {items.map(({ label, href, description }) => (
                  <li key={label}>
                    <DialogClose asChild>
                      <a
                        href={href}
                        onClick={() => { navigating.current = true }}
                        className="group flex items-center justify-between gap-4 rounded-xl px-3 py-3 transition-colors hover:bg-blue-600/8 focus-visible:bg-blue-600/8 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-inset focus-visible:ring-ring"
                      >
                        <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-muted-foreground">{description}</span>
                        </span>
                        <span className="flex size-8 shrink-0 items-center justify-center rounded-full border text-muted-foreground transition-colors group-hover:border-blue-500/30 group-hover:bg-blue-600/10 group-hover:text-blue-600 dark:group-hover:text-blue-400">
                          <RiArrowRightLine className="size-4" aria-hidden="true" />
                        </span>
                      </a>
                    </DialogClose>
                  </li>
                ))}
              </ul>
            </nav>
          </div>

          <div className="shrink-0 border-t bg-muted/35 p-5">
            <p className="mb-3 text-xs text-muted-foreground">One API. Every AI model.</p>
            <DialogClose asChild>
              <a
                href="#pricing"
                onClick={() => { navigating.current = true }}
                className="flex h-12 items-center justify-between rounded-lg bg-blue-600 px-4 text-sm font-medium text-white shadow-[0_6px_24px_rgba(23,61,166,.2)] transition-colors hover:bg-blue-500 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background"
              >
                Get started
                <RiArrowRightLine className="size-4" aria-hidden="true" />
              </a>
            </DialogClose>
          </div>
        </DialogPrimitive.Content>
      </DialogPortal>
    </Dialog>
  )
}