import Link from 'next/link'
import { useRouter } from 'next/router'
import clsx from 'clsx'
import { AnimatePresence, motion } from 'framer-motion'
import { Button } from '@/components/Button'
import { Tag } from '@/components/Tag'
import { remToPx } from '@/lib/remToPx'
import {useEffect, useState} from "react";
import {NavigationStateProvider, useNavigationState} from "@/components/NavigationState";

export const apiNavigation = [
  {
    title: 'Guides',
    links: [
      { title: 'Quickstart', href: '/api/guides/quickstart' },
      { title: 'Authentication', href: '/api/guides/authentication' },
      { title: 'Errors', href: '/api/guides/errors' },
      // { title: 'Events', href: '/accounts' },
    ],
  },
  {
    title: 'Resources',
    links: [
      { title: 'Accounts', href: '/api/resources/accounts' },
      { title: 'Users', href: '/api/resources/users' },
      { title: 'Tokens', href: '/api/resources/tokens' },
      { title: 'Peers', href: '/api/resources/peers' },
      { title: 'Setup Keys', href: '/api/resources/setup-keys' },
      { title: 'Groups', href: '/api/resources/groups' },
      { title: 'Policies', href: '/api/resources/policies' },
      { title: 'Posture-Checks', href: '/api/resources/posture-checks' },
      { title: 'Geo-Locations', href: '/api/resources/geo-locations' },
      { title: 'Routes', href: '/api/resources/routes' },
      { title: 'DNS', href: '/api/resources/dns' },
      { title: 'Events', href: '/api/resources/events' },
    ],
  },
]

export function NavigationAPI({tableOfContents, className}) {
  return (
      <nav className={className}>
        <ul role="list">
          <TopLevelNavItem href="https://netbird.io/">Home</TopLevelNavItem>
          <TopLevelNavItem href="/">Docs</TopLevelNavItem>
          <TopLevelNavItem href="/api">API</TopLevelNavItem>
          <TopLevelNavItem href="https://netbird.io/knowledge-hub/">Learn</TopLevelNavItem>
          <TopLevelNavItem href="https://github.com/netbirdio/netbird">Github</TopLevelNavItem>
          <TopLevelNavItem href="https://join.slack.com/t/netbirdio/shared_invite/zt-vrahf41g-ik1v7fV8du6t0RwxSrJ96A">Support</TopLevelNavItem>
          {apiNavigation.map((group, groupIndex) => (
              <NavigationStateProvider key={group.title} index={groupIndex}>
                <NavigationGroup
                    group={group}
                    tableOfContents={tableOfContents}
                    className={groupIndex === 0 && 'md:mt-0'}
                />
              </NavigationStateProvider>
            ))}
          <li className="sticky bottom-0 z-10 mt-6 min-[416px]:hidden">
            <Button href="https://app.netbird.io/" variant="filled" className="w-full">
              Sign in
            </Button>
          </li>
        </ul>
      </nav>
  )
}
export function TopLevelNavItem({ href, children }) {
  return (
    <li className="md:hidden">
      <Link
        href={href}
        className="block py-1 text-sm text-zinc-600 transition hover:text-zinc-900 dark:text-zinc-400 dark:hover:text-white"
      >
        {children}
      </Link>
    </li>
  )
}

export function NavLink({ href, tag, active, isAnchorLink = false, children, links, isChildren = false }) {
  let router = useRouter();

  return (
      <div className={"relative"} >
           <Link
              href={href ? href : "#"}
              data-nb-link={active ? 1 : 0}
              aria-current={active ? 'page' : undefined}
              className={clsx(
                  'flex justify-between gap-2 py-1 pr-3 text-sm transition',
                  isAnchorLink ? 'pl-7' : 'pl-4',
                  active
                      ? 'text-zinc-900 dark:text-white'
                      : 'text-zinc-600 hover:text-zinc-900 dark:text-zinc-400 dark:hover:text-white',
                  isChildren ? 'pl-7' : 'pl-4',
              )}
          >
              <span className="truncate">{children}</span>
              {tag && (
                  <Tag variant="small" color="zinc">
                      {tag}
                  </Tag>
              )}
          </Link>

        {links &&
            <ul role="list">
              {links.map((link,index) => (
                  <motion.li key={index} layout="position" className="relative">
                    <NavLink href={link.href} active={link.href === router.pathname} isChildren={true}>
                      {link.title}
                    </NavLink>
                  </motion.li>
              ))}
            </ul>
        }
  </div>

  )
}

export function flattenNavItems(links, onlyLinks = false) {
    let output = []
    for (let link of links) {
        output.push(link)
        if (link.links) output.push(...flattenNavItems(link.links, onlyLinks))
    }
    if(onlyLinks) output = output.filter((link) => link.href)
    return output
}

export function VisibleSectionHighlight() {
    const router = useRouter();
    let height = remToPx(2)
    let offset = remToPx(0)
    const [activeIndex] = useNavigationState();
    const [top, setTop] = useState(0);

    useEffect(() => {
        setTop(offset + (activeIndex) * height);
    }, [activeIndex, router.pathname]);

    return activeIndex >= 0 && (
        <motion.div
            layout
            initial={{ opacity: 0 }}
            animate={{ opacity: 1, transition: { delay: 0.2 } }}
            exit={{ opacity: 0 }}
            className="absolute inset-x-0 top-0 bg-zinc-800/2.5 will-change-transform dark:bg-white/2.5"
            style={{ borderRadius: 8, height, top }}
        />
    )
}

export function ActivePageMarker() {
    const router = useRouter();
    let itemHeight = remToPx(2)
    let offset = remToPx(0.25)
    const [activeIndex] = useNavigationState();
    const [top, setTop] = useState(0);

    useEffect(() => {
        setTop(offset + (activeIndex) * itemHeight);
    }, [activeIndex, router.pathname]);

    return activeIndex >= 0 && (
        <motion.div
            layout
            className="absolute left-2 h-6 w-px bg-orange-500"
            initial={{ opacity: 0 }}
            animate={{ opacity: 1, transition: { delay: 0.2 } }}
            exit={{ opacity: 0 }}
            style={{ top }}
        />
    )
}

function NavigationGroup({ group, className, tableOfContents }) {
  let router = useRouter()
  let isActiveGroup =
    group.links.findIndex((link) => link.href === router.pathname.replace("ipa", "api")) !== -1

  return (
    <li className={clsx('relative mt-6', className)}>
      <motion.h2
        layout="position"
        data-nb-link={group.title}
        className="text-xs font-semibold text-zinc-900 dark:text-white"
      >
        {group.title}
      </motion.h2>
      <div className="relative mt-3 pl-2">
        <AnimatePresence >
          {isActiveGroup && (
              <VisibleSectionHighlight group={group} pathname={router.pathname.replace("ipa", "api")} />
          )}
        </AnimatePresence>
        <motion.div
          layout
          className="absolute inset-y-0 left-2 w-px bg-zinc-900/10 dark:bg-white/5"
        />
        <AnimatePresence initial={false}>
          {isActiveGroup && (
            <ActivePageMarker group={group} pathname={router.pathname.replace("ipa", "api")} />
          )}
        </AnimatePresence>
        <ul role="list" className="border-l border-transparent">
          {group.links.map((link) => (
            <motion.li key={link.href} layout="position" className="relative">
              <NavLink href={link.href} active={link.href === router.pathname.replace("ipa", "api")}>
                {link.title}
              </NavLink>
              <AnimatePresence mode="popLayout" initial={false}>
                {link.href === router.pathname.replace("ipa", "api") && (
                  <motion.ul
                    role="list"
                    initial={{ opacity: 0 }}
                    animate={{
                      opacity: 1,
                      transition: { delay: 0.1 },
                    }}
                    exit={{
                      opacity: 0,
                      transition: { duration: 0.15 },
                    }}
                  >
                    {router.route.startsWith("/ipa/resources") && tableOfContents?.map((section) => (
                      <li key={section.id}>
                        <NavLink
                          href={`${link.href}#${section.id}`}
                          tag={section.tag}
                          isAnchorLink
                        >
                          {section.title}
                        </NavLink>
                      </li>
                    ))}
                  </motion.ul>
                )}
              </AnimatePresence>
            </motion.li>
          ))}
        </ul>
      </div>
    </li>
  )
}



