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

import { Colors, colorPropType } from '../Types'

export interface CPlaceholderProps extends HTMLAttributes<HTMLSpanElement> {
  /**
   * Set animation type to better convey the perception of something being actively loaded.
   */
  animation?: 'glow' | 'wave'
  /**
   * A string of all className you want applied to the 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
  /**
   * Component used for the root node. Either a string to use a HTML element or a component.
   */
  component?: string | ElementType
  /**
   * Size the component extra small, small, or large.
   */
  size?: 'xs' | 'sm' | 'lg'
  /**
   * The number of columns on extra small devices (<576px).
   */
  xs?: number
  /**
   * The number of columns on small devices (<768px).
   */
  sm?: number
  /**
   * The number of columns on medium devices (<992px).
   */
  md?: number
  /**
   * The number of columns on large devices (<1200px).
   */
  lg?: number
  /**
   * The number of columns on X-Large devices (<1400px).
   */
  xl?: number
  /**
   * The number of columns on XX-Large devices (≥1400px).
   */
  xxl?: number
}

const BREAKPOINTS = [
  'xxl' as const,
  'xl' as const,
  'lg' as const,
  'md' as const,
  'sm' as const,
  'xs' as const,
]

export const CPlaceholder = forwardRef<HTMLSpanElement, CPlaceholderProps>(
  (
    { children, animation, className, color, component: Component = 'span', size, ...rest },
    ref,
  ) => {
    const repsonsiveClassNames: string[] = []

    BREAKPOINTS.forEach((bp) => {
      const breakpoint = rest[bp]
      delete rest[bp]

      const infix = bp === 'xs' ? '' : `-${bp}`

      if (typeof breakpoint === 'number') {
        repsonsiveClassNames.push(`col${infix}-${breakpoint}`)
      }

      if (typeof breakpoint === 'boolean') {
        repsonsiveClassNames.push(`col${infix}`)
      }
    })

    const _className = classNames(
      animation ? `placeholder-${animation}` : 'placeholder',
      {
        [`bg-${color}`]: color,
        [`placeholder-${size}`]: size,
      },
      repsonsiveClassNames,
      className,
    )

    return (
      <Component className={_className} {...rest} ref={ref}>
        {children}
      </Component>
    )
  },
)

CPlaceholder.propTypes = {
  animation: PropTypes.oneOf(['glow', 'wave']),
  children: PropTypes.node,
  className: PropTypes.string,
  color: colorPropType,
  component: PropTypes.elementType,
  size: PropTypes.oneOf(['xs', 'sm', 'lg']),
}

CPlaceholder.displayName = 'CPlaceholder'