import Link from 'next/link'
import orderBy from 'lodash.orderby'
import {
  RssIcon,
  TutorialIcon,
  GuideIcon,
  HelpIcon,
  DocsIcon,
  DesignIcon,
  BoxIcon,
  CogIcon,
  UserIcon,
  CommunityIcon,
  ShowcaseIcon,
} from 'shared/components/icons.mjs'

// Don't show children for blog and showcase posts
const keepClosed = ['blog', 'showcase']

// List of icons matched to top-level slug
const icons = {
  accessories: (className = '') => <TutorialIcon className={className} />,
  account: (className = '') => <UserIcon className={className} />,
  blocks: (className = '') => <BoxIcon className={className} />,
  blog: (className = '') => <RssIcon className={className} />,
  community: (className = '') => <CommunityIcon className={className} />,
  designs: (className = '') => <DesignIcon className={className} />,
  docs: (className = '') => <DocsIcon className={className} />,
  garments: (className = '') => <DesignIcon className={className} />,
  guides: (className = '') => <GuideIcon className={className} />,
  howtos: (className = '') => <HelpIcon className={className} />,
  reference: (className = '') => <DocsIcon className={className} />,
  showcase: (className = '') => <ShowcaseIcon className={className} />,
  tutorials: (className = '') => <TutorialIcon className={className} />,
  utilities: (className = '') => <CogIcon className={className} />,
}

/* helper method to order nav entries */
const order = (obj) => orderBy(obj, ['__order', '__title'], ['asc', 'asc'])

// Component for the collapse toggle
// Exported for re-use
export const Chevron = ({ w = 8, m = 2 }) => (
  <svg
    className={`
    fill-current opacity-75 w-${w} h-${w} mr-${m}
    details-toggle hover:text-secondary sm:hover:text-secondary
  `}
    xmlns="http://www.w3.org/2000/svg"
    viewBox="0 0 20 20"
  >
    <path d="M12.95 10.707l.707-.707L8 4.343 6.586 5.757 10.828 10l-4.242 4.243L8 15.657l4.95-4.95z" />
  </svg>
)

// Helper method to filter out the real children
const currentChildren = (current) =>
  Object.values(order(current)).filter((entry) => typeof entry === 'object')

// Shared classes for links
// Exported for re-use
export const linkClasses = `text-lg lg:text-xl
  py-1
  text-base-content sm:text-base-content
  hover:text-secondary
  sm:hover:text-secondary
`

// Figure out whether a page is on the path to the active page
const isActive = (slug, active) => {
  if (slug === active) return true
  let result = true
  const slugParts = slug.split('/')
  const activeParts = active.split('/')
  for (const i in slugParts) {
    if (slugParts[i] !== activeParts[i]) result = false
  }

  return result
}

// Component that renders a sublevel of navigation
const SubLevel = ({ nodes = {}, active }) => (
  <ul className="pl-5 list-inside">
    {currentChildren(nodes).map((child) =>
      Object.keys(child).length > 4 ? (
        <li key={child.__slug} className="flex flex-row">
          <details className="grow" open={isActive(child.__slug, active)}>
            <summary
              className={`
              flex flex-row
              px-2
              text-base-content
              sm:text-base-content
              hover:cursor-row-resize
              items-center
            `}
            >
              <Link
                href={`${child.__slug}`}
                title={child.__title}
                className={`
                  grow pl-2 border-l-2
                  hover:cursor-pointer
                  hover:border-secondary
                  sm:hover:border-secondary
                  ${
                    child.__slug === active
                      ? 'text-secondary border-secondary sm:text-secondary sm:border-secondary'
                      : 'text-base-content sm:text-base-content'
                  }
                `}
              >
                <span className={linkClasses}>
                  <span
                    className={`
                      text-3xl mr-2 inline-block p-0 leading-3
                      ${
                        child.__slug === active
                          ? 'text-secondary sm:text-secondary translate-y-1'
                          : 'translate-y-3'
                      }
                    `}
                  >
                    {child.__slug === active ? <>&bull;</> : <>&deg;</>}
                  </span>
                  <span className={child.__slug === active ? 'font-bold' : ''}>
                    {child.__linktitle || child.__title}
                  </span>
                </span>
              </Link>
              <Chevron w={6} m={3} />
            </summary>
            <SubLevel nodes={child} active={active} />
          </details>
        </li>
      ) : (
        <li className="pl-2 flex flex-row items-center" key={child.__slug}>
          <Link
            href={`${child.__slug}`}
            title={child.__title}
            className={`
              pl-2 border-l-2
              grow
              hover:cursor-pointer
              hover:border-secondary
              sm:hover:border-secondary
              ${
                child.__slug === active
                  ? 'text-secondary border-secondary sm:text-secondary sm:border-secondary'
                  : 'text-base-content sm:text-base-content'
              }`}
          >
            <span className={linkClasses}>
              <span
                className={`
                  text-3xl mr-2 inline-block p-0 leading-3
                  ${
                    child.__slug === active
                      ? 'text-secondary sm:text-secondary translate-y-1'
                      : 'translate-y-3'
                  }
                `}
              >
                {child.__slug === active ? <>&bull;</> : <>&deg;</>}
              </span>
              <span className={child.__slug === active ? 'font-bold' : ''}>
                {child.__linktitle || child.__title}
              </span>
            </span>
          </Link>
        </li>
      )
    )}
  </ul>
)

// Component that renders a toplevel of navigation
const TopLevel = ({ icon, title, current, slug, hasChildren = false, active }) => (
  <details className="py-1" open={keepClosed.indexOf(current.__slug) === -1 ? 1 : 0}>
    <summary
      className={`
      flex flex-row uppercase gap-4 font-bold text-lg
      hover:cursor-row-resize
      p-2
      text-base-content
      sm:text-base-content
      items-center
    `}
    >
      <span className="text-secondary">{icon}</span>
      <Link
        href={`${slug}`}
        className={`
          grow ${linkClasses} hover:cursor-pointer
          ${slug === active ? 'text-secondary sm:text-secondary' : ''}`}
      >
        {title}
      </Link>
      {hasChildren && <Chevron />}
    </summary>
    {hasChildren && <SubLevel nodes={current} active={active} />}
  </details>
)

const Navigation = ({ app, active, className = '' }) => {
  if (!app.navigation) return null
  const output = []
  for (const page of order(app.navigation))
    output.push(
      <TopLevel
        key={page.__slug}
        icon={
          icons[page.__slug] ? (
            icons[page.__slug]('w-6 h-6')
          ) : (
            <span className="text-3xl mr-2 translate-y-3 inline-block p-0 leading-3">&deg;</span>
          )
        }
        title={page.__title}
        slug={page.__slug}
        hasChildren={keepClosed.indexOf(page.__slug) === -1}
        nav={app.navigation}
        current={order(app.navigation[page.__slug])}
        active={active}
      />
    )

  return <div className={`pb-20 ${className}`}>{output}</div>
}

export const Icons = ({
  app,
  ulClasses = '',
  liClasses = '',
  linkClasses = `grow text-lg lg:text-xl py-1 text-base-content sm:text-base-content
  hover:text-secondary sm:hover:text-secondary hover:cursor-pointer
  flex flex-col items-center`,
  linkStyle = {},
}) => {
  if (!app.navigation) return null
  const output = []
  for (const page of order(app.navigation)) {
    output.push(
      <li key={page.__slug} className={liClasses}>
        <Link href={`${page.__slug}`} title={page.__title} style={linkStyle}>
          <span className={linkClasses}>
            {icons[page.__slug] ? icons[page.__slug]('w-14 h-14') : <HelpIcon />}
            <span className="font-bold">{page.__title}</span>
          </span>
        </Link>
      </li>
    )
  }

  return <ul className={ulClasses}>{output}</ul>
}

export const PrimaryNavigation = ({ app, active, before = [], after = [] }) => (
  <nav className="mb-12">
    {before}
    <Icons app={app} ulClasses="hidden md:block lg:hidden flex flex-col items-center" />
    <Navigation app={app} active={active} className="md:hidden lg:block" />
    {after}
  </nav>
)