'use client'

import React, { Suspense, useCallback, useEffect, useMemo, useRef } from 'react'
import { usePathname } from 'next/navigation'
import Image from 'next/image'

import '@/styles/userSidebar.scss'
import { siteConfig } from '@/config/site'
import Loading from '@/components/layouts/Loading'
import SidebarUserFooter from '@/components/layouts/SidebarUserFooter'
import SidebarNav from '@/components/layouts/sidebar/SidebarNav'
import Button from '@/components/formElements/Button'
import { MOBILE_SIDEBAR_WIDTH } from '@/config/sidebar'
import MenuBurgerIcon from '@/components/icons/MenuBurgerIcon'
import CloseIcon from '@/components/icons/CloseIcon'
import { withBasePath } from '@/constants/images'

const FOCUSABLE_SELECTOR =
  'a[href], button:not([disabled]), input:not([disabled]), select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex="-1"])'

const SidebarMobile = () => {
  const [isOpen, setIsOpen] = React.useState(false)
  const triggerRef = useRef<HTMLButtonElement>(null)
  const closeButtonRef = useRef<HTMLButtonElement>(null)
  const panelRef = useRef<HTMLDivElement>(null)
  const pathname = usePathname()
  const accessibleMenus = useMemo(() => siteConfig().userSidebar, [])

  const handleLinkClick = () => {
    setIsOpen(false)
  }

  const closeMenu = useCallback(() => {
    setIsOpen(false)
    window.requestAnimationFrame(() => triggerRef.current?.focus())
  }, [])

  useEffect(() => {
    if (!isOpen) return

    const previousOverflow = document.body.style.overflow
    const handleKeyDown = (event: KeyboardEvent) => {
      if (event.key === 'Escape') {
        closeMenu()

        return
      }

      if (event.key !== 'Tab') return
      const focusableElements = Array.from(panelRef.current?.querySelectorAll<HTMLElement>(FOCUSABLE_SELECTOR) ?? [])
      const firstElement = focusableElements[0]
      const lastElement = focusableElements.at(-1)

      if (!firstElement || !lastElement) return
      if (event.shiftKey && document.activeElement === firstElement) {
        event.preventDefault()
        lastElement.focus()
      } else if (!event.shiftKey && document.activeElement === lastElement) {
        event.preventDefault()
        firstElement.focus()
      }
    }

    document.body.style.overflow = 'hidden'
    document.addEventListener('keydown', handleKeyDown)
    window.requestAnimationFrame(() => closeButtonRef.current?.focus())

    return () => {
      document.body.style.overflow = previousOverflow
      document.removeEventListener('keydown', handleKeyDown)
    }
  }, [closeMenu, isOpen])

  return (
    <>
      <Button
        ref={triggerRef}
        iconOnly
        aria-controls="admin-mobile-navigation"
        aria-expanded={isOpen}
        aria-label="باز کردن منو"
        className="ms-2 rounded-xl border border-secondary-40 bg-white p-2 shadow-sm hover:bg-secondary-50 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
        variant="bordered"
        onClick={() => {
          setIsOpen(true)
        }}
      >
        <MenuBurgerIcon className="size-6 text-tertiary-600" />
      </Button>

      {isOpen ? (
        <div
          aria-hidden="true"
          className="fixed inset-0 z-40 bg-black/50 md:hidden"
          onClick={closeMenu}
        />
      ) : null}

      <div
        ref={panelRef}
        aria-hidden={!isOpen}
        aria-label="منوی مدیریت"
        aria-modal="true"
        className={`sidebar fixed start-0 top-0 z-50 flex h-[100dvh] flex-col border-e border-secondary-40 bg-white shadow-2xl transition-transform duration-300 ease-in-out motion-reduce:transition-none md:hidden ${
          isOpen ? 'translate-x-0' : 'translate-x-full'
        }`}
        id="admin-mobile-navigation"
        inert={!isOpen}
        role="dialog"
        style={{ width: MOBILE_SIDEBAR_WIDTH }}
      >
        <div className="relative mx-4 flex h-24 shrink-0 items-center gap-3 border-b border-secondary-40 px-2">
          <Button
            ref={closeButtonRef}
            iconOnly
            aria-label="بستن منو"
            className="absolute end-1 top-1 rounded-lg p-2 hover:bg-primary-100 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary-500"
            size="sm"
            variant="light"
            onClick={closeMenu}
          >
            <CloseIcon className="size-5 text-tertiary-600" />
          </Button>
          <div className="flex size-11 items-center justify-center rounded-2xl bg-primary-600">
            <Image
              alt="قبیله"
              className="size-7 brightness-0 invert"
              height={28}
              src={withBasePath('/logo.svg')}
              width={28}
            />
          </div>
          <div className="text-right">
            <h2 className="font-bold text-secondary-10">مدیریت قبیله</h2>
            <p className="text-smt-neutral-30">پنل مدیریت پلتفرم</p>
          </div>
        </div>
        <div className="pb-3 flex flex-col justify-between flex-1 min-h-0 overflow-auto">
          <div className="px-3 pt-4">
            <p className="mb-2 px-3 text-[10px] font-bold text-secondary-30">منوی مدیریت</p>
            <SidebarNav
              items={accessibleMenus}
              pathname={pathname}
              onLinkClick={handleLinkClick}
            />
          </div>
          <SidebarUserFooter />
        </div>
      </div>
    </>
  )
}

const SidebarMobileWrapper = () => {
  return (
    <Suspense fallback={<Loading />}>
      <SidebarMobile />
    </Suspense>
  )
}

export default SidebarMobileWrapper