'use client';

import * as React from 'react';
import { ChevronRightIcon, MoreHorizontalIcon } from '@/icons';
import { Slot } from 'radix-ui';

import { cn } from '@/lib/utils';

export type BreadcrumbProps = React.ComponentProps<'nav'>;
export interface BreadcrumbLinkProps extends React.ComponentProps<'a'> {
  /** Render the child element instead of an `<a>` — e.g. a router `<Link>`. */
  asChild?: boolean;
}

/**
 * Trail showing where the current page sits in the hierarchy.
 *
 * The last crumb is the current page: render it as `BreadcrumbPage`, not a
 * link, so it is announced with `aria-current="page"`.
 */
function Breadcrumb(props: BreadcrumbProps) {
  return <nav aria-label="breadcrumb" data-slot="breadcrumb" {...props} />;
}

function BreadcrumbList({ className, ...props }: React.ComponentProps<'ol'>) {
  return (
    <ol
      data-slot="breadcrumb-list"
      className={cn(
        'flex flex-wrap items-center gap-1.5 text-sm break-words text-muted-foreground sm:gap-2.5',
        className
      )}
      {...props}
    />
  );
}

function BreadcrumbItem({ className, ...props }: React.ComponentProps<'li'>) {
  return (
    <li
      data-slot="breadcrumb-item"
      className={cn('inline-flex items-center gap-1.5', className)}
      {...props}
    />
  );
}

function BreadcrumbLink({ asChild, className, ...props }: BreadcrumbLinkProps) {
  const Comp = asChild ? Slot.Root : 'a';

  return (
    <Comp
      data-slot="breadcrumb-link"
      className={cn(
        'transition-colors duration-(--ui-duration-fast) hover:text-foreground',
        className
      )}
      {...props}
    />
  );
}

/** The current page. Not a link — it is where the user already is. */
function BreadcrumbPage({ className, ...props }: React.ComponentProps<'span'>) {
  return (
    <span
      data-slot="breadcrumb-page"
      role="link"
      aria-disabled="true"
      aria-current="page"
      className={cn('font-normal text-foreground', className)}
      {...props}
    />
  );
}

function BreadcrumbSeparator({ children, className, ...props }: React.ComponentProps<'li'>) {
  return (
    <li
      data-slot="breadcrumb-separator"
      role="presentation"
      aria-hidden="true"
      className={cn('[&>svg]:size-3.5', className)}
      {...props}
    >
      {children ?? <ChevronRightIcon />}
    </li>
  );
}

/** Stands in for collapsed middle crumbs on narrow screens. */
function BreadcrumbEllipsis({ className, ...props }: React.ComponentProps<'span'>) {
  return (
    <span
      data-slot="breadcrumb-ellipsis"
      role="presentation"
      aria-hidden="true"
      className={cn('flex size-9 items-center justify-center', className)}
      {...props}
    >
      <MoreHorizontalIcon className="size-4" />
      <span className="sr-only">More</span>
    </span>
  );
}

export {
  Breadcrumb,
  BreadcrumbList,
  BreadcrumbItem,
  BreadcrumbLink,
  BreadcrumbPage,
  BreadcrumbSeparator,
  BreadcrumbEllipsis,
};