import * as React from 'react';
import clsx from 'clsx';
import { Button } from '@tesseract-design/web-base';

/**
 * Derived HTML element of the {@link LinkButton} component.
 */
export type LinkButtonDerivedElement = HTMLAnchorElement;

/**
 * Props of the {@link LinkButton} component.
 */
export interface LinkButtonProps<T = any> extends Omit<React.HTMLProps<LinkButtonDerivedElement>, 'size'> {
  /**
   * Should the component occupy the whole width of its parent?
   */
  block?: boolean;
  /**
   * Variant of the component.
   */
  variant?: Button.Variant;
  /**
   * Complementary content of the component.
   */
  subtext?: React.ReactNode;
  /**
   * Short complementary content displayed at the edge of the component.
   */
  badge?: React.ReactNode;
  /**
   * Is this component part of a menu?
   */
  menuItem?: boolean;
  /**
   * Size of the component.
   */
  size?: Button.Size;
  /**
   * Should the component's content use minimal space?
   */
  compact?: boolean;
  /**
   * Component to use in rendering.
   */
  component?: React.ElementType<T>;
  /**
   * Is the component unable to receive activation?
   */
  disabled?: boolean;
}

/**
 * Component for performing a navigation action.
 */
export const LinkButton = React.forwardRef<LinkButtonDerivedElement, LinkButtonProps>((
  {
    variant = 'bare' as const,
    subtext,
    badge,
    menuItem = false,
    children,
    size = 'medium' as const,
    compact = false,
    className,
    block = false,
    component: EnabledComponent = 'a',
    disabled = false,
    href,
    style,
    ...etcProps
  },
  forwardedRef,
) => {
  const Component = disabled ? 'button' : EnabledComponent;
  return (
    <Component
      {...etcProps}
      href={disabled ? undefined : href}
      type={disabled ? 'button' : undefined}
      ref={forwardedRef}
      disabled={disabled || undefined}
      className={clsx(
        'items-center justify-center rounded overflow-hidden ring-secondary/50 leading-none select-none no-underline m-0',
        'focus:outline-0 focus:ring-4',
        'active:ring-tertiary/50',
        'disabled:opacity-50 disabled:cursor-not-allowed',
        {
          'flex w-full': block,
          'inline-flex max-w-full align-middle': !block,
        },
        {
          'pl-2 gap-2': compact,
          'pl-4 gap-4': !compact,
          'pr-4': !(compact || menuItem),
          'pr-2': compact || menuItem,
        },
        {
          'border-2 border-primary focus:border-secondary active:border-tertiary disabled:border-primary': variant !== 'bare',
          'bg-negative text-primary focus:text-secondary active:text-tertiary disabled:text-primary': variant !== 'filled',
          'bg-primary text-negative focus:bg-secondary active:bg-tertiary focus:text-negative active:text-negative disabled:bg-primary': variant === 'filled',
        },
        {
          'h-10': size === 'small',
          'h-12': size === 'medium',
          'h-16': size === 'large',
        },
        className,
      )}
      data-testid="link"
      style={style}
    >
      <span
        className={clsx(
          'flex-auto min-w-0',
          {
            'text-left': compact || menuItem,
            'text-center': !(compact || menuItem),
          },
        )}
      >
        <span
          className="block uppercase font-bold h-[1.1em] w-full whitespace-nowrap overflow-hidden text-ellipsis font-semi-expanded"
          data-testid="children"
        >
          {children}
        </span>
        {subtext && (
          <>
            <span className="sr-only">
              {' - '}
            </span>
            <span
              className="block h-[1.3em] w-full whitespace-nowrap overflow-hidden text-ellipsis font-semi-expanded font-bold text-xs"
              data-testid="subtext"
            >
              {subtext}
            </span>
          </>
        )}
      </span>
      {badge && (
        <>
          <span className="sr-only">
            {' - '}
          </span>
          <span
            data-testid="badge"
          >
            {badge}
          </span>
        </>
      )}
      {menuItem && (
        <span
          data-testid="menuItemIndicator"
        >
          <svg
            className="w-6 h-6 fill-none stroke-current stroke-2 linejoin-round linecap-round"
            viewBox="0 0 24 24"
            role="presentation"
          >
            <polyline points="9 18 15 12 9 6" />
          </svg>
        </span>
      )}
    </Component>
  );
});

LinkButton.displayName = 'LinkButton';

LinkButton.defaultProps = {
  variant: 'bare',
  size: 'medium',
  compact: false,
  menuItem: false,
  component: 'a',
  badge: undefined,
  subtext: undefined,
  block: false,
  disabled: false,
};