import Link from "next/link";
import { usePathname } from "next/navigation";
import React, { Fragment } from "react";

import { classNames } from "@calcom/lib";
import { useLocale } from "@calcom/lib/hooks/useLocale";
import { Tooltip, Icon, SkeletonText } from "@calcom/ui";
import type { IconName } from "@calcom/ui";

import { useShouldDisplayNavigationItem } from "./useShouldDisplayNavigationItem";

export type NavigationItemType = {
  name: string;
  href: string;
  isLoading?: boolean;
  onClick?: React.MouseEventHandler<HTMLAnchorElement | HTMLButtonElement>;
  target?: HTMLAnchorElement["target"];
  badge?: React.ReactNode;
  icon?: IconName;
  child?: NavigationItemType[];
  pro?: true;
  onlyMobile?: boolean;
  onlyDesktop?: boolean;
  moreOnMobile?: boolean;
  isCurrent?: ({
    item,
    isChild,
    pathname,
  }: {
    item: Pick<NavigationItemType, "href">;
    isChild?: boolean;
    pathname: string | null;
  }) => boolean;
};

const defaultIsCurrent: NavigationItemType["isCurrent"] = ({ isChild, item, pathname }) => {
  return isChild ? item.href === pathname : item.href ? pathname?.startsWith(item.href) ?? false : false;
};

export const NavigationItem: React.FC<{
  index?: number;
  item: NavigationItemType;
  isChild?: boolean;
}> = (props) => {
  const { item, isChild } = props;
  const { t, isLocaleReady } = useLocale();
  const pathname = usePathname();
  const isCurrent: NavigationItemType["isCurrent"] = item.isCurrent || defaultIsCurrent;
  const current = isCurrent({ isChild: !!isChild, item, pathname });
  const shouldDisplayNavigationItem = useShouldDisplayNavigationItem(props.item);

  if (!shouldDisplayNavigationItem) return null;

  return (
    <Fragment>
      <Tooltip side="right" content={t(item.name)} className="lg:hidden">
        <Link
          data-test-id={item.name}
          href={item.href}
          aria-label={t(item.name)}
          target={item.target}
          className={classNames(
            "todesktop:py-[7px] text-default group flex items-center rounded-md px-2 py-1.5 text-sm font-medium transition",
            item.child ? `[&[aria-current='page']]:!bg-transparent` : `[&[aria-current='page']]:bg-emphasis`,
            isChild
              ? `[&[aria-current='page']]:text-emphasis [&[aria-current='page']]:bg-emphasis hidden h-8 pl-16 lg:flex lg:pl-11 ${
                  props.index === 0 ? "mt-0" : "mt-px"
                }`
              : "[&[aria-current='page']]:text-emphasis mt-0.5 text-sm",
            isLocaleReady
              ? "hover:bg-subtle todesktop:[&[aria-current='page']]:bg-emphasis todesktop:hover:bg-transparent hover:text-emphasis"
              : ""
          )}
          aria-current={current ? "page" : undefined}>
          {item.icon && (
            <Icon
              name={item.isLoading ? "rotate-cw" : item.icon}
              className={classNames(
                "todesktop:!text-blue-500 mr-2 h-4 w-4 flex-shrink-0 rtl:ml-2 md:ltr:mx-auto lg:ltr:mr-2 [&[aria-current='page']]:text-inherit",
                item.isLoading && "animate-spin"
              )}
              aria-hidden="true"
              aria-current={current ? "page" : undefined}
            />
          )}
          {isLocaleReady ? (
            <span
              className="hidden w-full justify-between truncate text-ellipsis lg:flex"
              data-testid={`${item.name}-test`}>
              {t(item.name)}
              {item.badge && item.badge}
            </span>
          ) : (
            <SkeletonText className="h-[20px] w-full" />
          )}
        </Link>
      </Tooltip>
      {item.child &&
        isCurrent({ pathname, isChild, item }) &&
        item.child.map((item, index) => <NavigationItem index={index} key={item.name} item={item} isChild />)}
    </Fragment>
  );
};

export const MobileNavigationItem: React.FC<{
  item: NavigationItemType;
  isChild?: boolean;
}> = (props) => {
  const { item, isChild } = props;
  const pathname = usePathname();
  const { t, isLocaleReady } = useLocale();
  const isCurrent: NavigationItemType["isCurrent"] = item.isCurrent || defaultIsCurrent;
  const current = isCurrent({ isChild: !!isChild, item, pathname });
  const shouldDisplayNavigationItem = useShouldDisplayNavigationItem(props.item);

  if (!shouldDisplayNavigationItem) return null;
  return (
    <Link
      key={item.name}
      href={item.href}
      target={item.target}
      className="[&[aria-current='page']]:text-emphasis hover:text-default text-muted relative my-2 min-w-0 flex-1 overflow-hidden rounded-md !bg-transparent p-1 text-center text-xs font-medium focus:z-10 sm:text-sm"
      aria-current={current ? "page" : undefined}>
      {item.badge && <div className="absolute right-1 top-1">{item.badge}</div>}
      {item.icon && (
        <Icon
          name={item.icon}
          className="[&[aria-current='page']]:text-emphasis  mx-auto mb-1 block h-5 w-5 flex-shrink-0 text-center text-inherit"
          aria-hidden="true"
          aria-current={current ? "page" : undefined}
        />
      )}
      {isLocaleReady ? <span className="block truncate">{t(item.name)}</span> : <SkeletonText />}
    </Link>
  );
};

export const MobileNavigationMoreItem: React.FC<{
  item: NavigationItemType;
  isChild?: boolean;
}> = (props) => {
  const { item } = props;
  const { t, isLocaleReady } = useLocale();
  const shouldDisplayNavigationItem = useShouldDisplayNavigationItem(props.item);

  if (!shouldDisplayNavigationItem) return null;

  return (
    <li className="border-subtle border-b last:border-b-0" key={item.name}>
      <Link href={item.href} className="hover:bg-subtle flex items-center justify-between p-5 transition">
        <span className="text-default flex items-center font-semibold ">
          {item.icon && (
            <Icon name={item.icon} className="h-5 w-5 flex-shrink-0 ltr:mr-3 rtl:ml-3" aria-hidden="true" />
          )}
          {isLocaleReady ? t(item.name) : <SkeletonText />}
        </span>
        <Icon name="arrow-right" className="text-subtle h-5 w-5" />
      </Link>
    </li>
  );
};