import Link from 'next/link'
import { useRouter } from 'next/router'
import { IconChevronLeft } from 'ui'
import * as NavItems from './NavigationMenu.constants'

import Image from 'next/image'
import clientLibsCommonSections from '~/../../spec/common-client-libs-sections.json'

const allFunctions = Object.values(clientLibsCommonSections.sections.functions)

const NavigationMenuRefList = ({ currentLevel, setLevel, id, lib }) => {
  // Get only the functions with references in the current librarry
  // ie: if the lib === dart, only get the dart functions

  const allCurrentFunctions = allFunctions
    .map((fn: any) => {
      if (fn.items.flat().find((item) => item.libs.includes(lib))) return fn
    })
    .filter((item) => item)

  const introItems = Object.values(clientLibsCommonSections.sections.intro[lib].items)
  const router = useRouter()

  const menu = NavItems[id]

  const FunctionLink = ({
    title,
    id,
    icon,
    product,
    library,
    slug,
  }: {
    title: string
    name?: string
    id: string
    icon?: string
    product?: string
    library: string
    slug: string
  }) => {
    return (
      <li key={id} className="function-link-item text-scale-1000">
        <Link href={`/reference/${library}/${slug}`} passHref>
          <a className="cursor-pointer transition text-sm hover:text-brand-900 flex gap-3">
            {icon && <img className="w-3" src={`${router.basePath}${icon}`} />}
            {title}
          </a>
        </Link>
      </li>
    )
  }

  const SideMenuTitle = ({ title }: { title: string }) => {
    return (
      <span className="font-mono text-xs uppercase text-scale-1200 font-medium tracking-wider mb-3">
        {title}
      </span>
    )
  }

  const Divider = () => {
    return <div className="h-px w-full bg-blackA-300 dark:bg-whiteA-300 my-3"></div>
  }

  return (
    <div
      className={[
        'transition-all ml-8 duration-150 ease-out',

        // enabled
        currentLevel === id && 'opacity-100 ml-0 delay-150',
        currentLevel === 'home' && 'ml-12',

        // disabled
        currentLevel !== 'home' && currentLevel !== id ? '-ml-8' : '',
        currentLevel !== id ? 'opacity-0 invisible absolute' : '',
      ].join(' ')}
    >
      <div className={'w-full flex flex-col gap-0 sticky top-8'}>
        {/* {process.env.NEXT_PUBLIC_EXPERIMENTAL_REF !== 'true' && ( */}
        <Link href="/" passHref>
          <a
            className={[
              'flex items-center gap-1 text-xs group mb-3',
              'text-base transition-all duration-200 text-scale-1100 hover:text-brand-1200 hover:cursor-pointer ',
            ].join(' ')}
          >
            <div className="relative w-2">
              <div className="transition-all ease-out ml-0 group-hover:-ml-1">
                <IconChevronLeft size={10} strokeWidth={3} />
              </div>
            </div>
            <span>Back to Main Menu</span>
          </a>
        </Link>
        {/* )} */}
        {/* {process.env.NEXT_PUBLIC_EXPERIMENTAL_REF !== 'true' && ( */}
        <div className="flex items-center gap-3 my-3">
          <Image
            alt={id}
            width={24}
            height={24}
            src={`${router.basePath}` + menu.icon ?? `/img/icons/menu/${id}.svg`}
            className="rounded"
          />
          <h2
            className={['font-mono text-sm text-brand-1200 ', !menu.title && 'capitalize'].join(
              ' '
            )}
          >
            {menu.title}
          </h2>
        </div>
        {/* )} */}

        <ul className="function-link-list">
          {introItems.map((item) => (
            <FunctionLink {...item} library={menu.title} />
          ))}

          <Divider />

          {allCurrentFunctions.map((fn: any) => {
            const toplevelItems = fn.items.filter((item) => !item.parent)
            toplevelItems.map((item) => <li>{item.title}</li>)

            // Database has Filters and Modifiers sub-items
            if (fn.title === 'Database') {
              const filters = fn.items.filter(
                (item) => item.parent === 'filters' && item.libs.includes(lib)
              )
              const modifiers = fn.items.filter(
                (item) => item.parent === 'modifiers' && item.libs.includes(lib)
              )

              return (
                <>
                  <SideMenuTitle title="Database" />

                  {toplevelItems.map((item) => (
                    <FunctionLink {...item} library={menu.title} />
                  ))}

                  <div className="ml-2 mt-4">
                    <SideMenuTitle title="Filters" />
                    {filters.map((item) => (
                      <FunctionLink {...item} library={menu.title} />
                    ))}
                  </div>

                  <div className="ml-2 mt-4">
                    <SideMenuTitle title="Modifiers" />
                    {modifiers.map((item) => (
                      <FunctionLink {...item} library={menu.title} />
                    ))}
                  </div>
                </>
              )
            } else {
              // Only database has subitems (Filters & Modifiers)
              // so output the rest directly
              return (
                <>
                  <Divider />
                  <SideMenuTitle title={fn.title} />
                  {fn.items.map((item) =>
                    item.libs.includes(lib) ? <FunctionLink {...item} library={menu.title} /> : ''
                  )}
                </>
              )
            }
          })}
        </ul>
        {menu.extras && (
          <>
            <Divider />{' '}
            <span className="font-mono text-xs uppercase text-scale-1200 font-medium tracking-wider mb-2">
              Resources
            </span>
          </>
        )}
        {menu.extras?.map((x) => {
          return (
            <div key={x.name}>
              <li>
                <Link href={`/${x.href}`} passHref>
                  <a className="cursor-pointer transition text-scale-1100 text-sm hover:text-brand-900 flex gap-3 my-1">
                    {x.icon && (
                      <Image
                        alt={x.icon}
                        width={20}
                        height={20}
                        src={`${router.basePath}${x.icon}`}
                      />
                    )}
                    {x.name}
                  </a>
                </Link>
              </li>
            </div>
          )
        })}
      </div>
    </div>
  )
}

export default NavigationMenuRefList