import React, { ElementType, forwardRef } from 'react'
import PropTypes from 'prop-types'
import classNames from 'classnames'

import { CLink, CLinkProps } from '../link/CLink'

import { PolymorphicRefForwardingComponent } from '../../helpers'
import { colorPropType } from '../../props'
import type { Colors, Shapes } from '../../types'

export interface CButtonProps extends Omit<CLinkProps, 'size'> {
  /**
   * Toggle the active state for the component.
   */
  active?: boolean
  /**
   * Component used for the root node. Either a string to use a HTML element or a component.
   */
  as?: ElementType
  /**
   * A string of all className you want applied to the base component.
   */
  className?: string
  /**
   * Sets the color context of the component to one of CoreUI’s themed colors.
   *
   * @type 'primary' | 'secondary' | 'success' | 'danger' | 'warning' | 'info' | 'dark' | 'light' | string
   */
  color?: Colors
  /**
   * Toggle the disabled state for the component.
   */
  disabled?: boolean
  /**
   * The href attribute specifies the URL of the page the link goes to.
   */
  href?: string
  /**
   * The role attribute describes the role of an element in programs that can make use of it, such as screen readers or magnifiers.
   */
  role?: string
  /**
   * Select the shape of the component.
   *
   * @type 'rounded' | 'rounded-top' | 'rounded-end' | 'rounded-bottom' | 'rounded-start' | 'rounded-circle' | 'rounded-pill' | 'rounded-0' | 'rounded-1' | 'rounded-2' | 'rounded-3' | string
   */
  shape?: Shapes
  /**
   * Size the component small or large.
   */
  size?: 'sm' | 'lg'
  /**
   * Specifies the type of button. Always specify the type attribute for the `<button>` element.
   * Different browsers may use different default types for the `<button>` element.
   */
  type?: 'button' | 'submit' | 'reset'
  /**
   * Set the button variant to an outlined button or a ghost button.
   */
  variant?: 'outline' | 'ghost'
}

export const CButton: PolymorphicRefForwardingComponent<'button', CButtonProps> = forwardRef<
  HTMLButtonElement | HTMLAnchorElement,
  CButtonProps
>(
  (
    { children, as = 'button', className, color, shape, size, type = 'button', variant, ...rest },
    ref
  ) => {
    return (
      <CLink
        as={rest.href ? 'a' : as}
        {...(!rest.href && { type: type })}
        className={classNames(
          'btn',
          {
            [`btn-${variant}-${color}`]: variant && color,
            [`btn-${variant}`]: variant && !color,
            [`btn-${color}`]: !variant && color,
            [`btn-${size}`]: size,
          },
          shape,
          className
        )}
        {...rest}
        ref={ref}
      >
        {children}
      </CLink>
    )
  }
)

CButton.propTypes = {
  as: PropTypes.elementType,
  children: PropTypes.node,
  className: PropTypes.string,
  color: colorPropType,
  shape: PropTypes.string,
  size: PropTypes.oneOf(['sm', 'lg']),
  type: PropTypes.oneOf(['button', 'submit', 'reset']),
  variant: PropTypes.oneOf(['outline', 'ghost']),
}

CButton.displayName = 'CButton'