import React, {
  useRef,
  useState,
  MouseEvent,
  useMemo,
  useImperativeHandle,
  PropsWithoutRef,
  RefAttributes,
} from 'react'
import useTheme from '../use-theme'
import ButtonDrip from './button.drip'
import ButtonLoading from './button-loading'
import { ButtonTypes, NormalSizes } from '../utils/prop-types'
import { filterPropsWithGroup, getButtonChildrenWithIcon } from './utils'
import { useButtonGroupContext } from '../button-group/button-group-context'
import {
  getButtonColors,
  getButtonCursor,
  getButtonDripColor,
  getButtonHoverColors,
  getButtonSize,
} from './styles'

interface Props {
  type?: ButtonTypes
  size?: NormalSizes
  ghost?: boolean
  loading?: boolean
  shadow?: boolean
  auto?: boolean
  effect?: boolean
  disabled?: boolean
  htmlType?: React.ButtonHTMLAttributes<any>['type']
  icon?: React.ReactNode
  iconRight?: React.ReactNode
  onClick?: React.MouseEventHandler<HTMLButtonElement>
  className?: string
}

const defaultProps = {
  type: 'default' as ButtonTypes,
  size: 'medium' as NormalSizes,
  htmlType: 'button' as React.ButtonHTMLAttributes<any>['type'],
  ghost: false,
  loading: false,
  shadow: false,
  auto: false,
  effect: true,
  disabled: false,
  className: '',
}

type NativeAttrs = Omit<React.ButtonHTMLAttributes<any>, keyof Props>
export type ButtonProps = Props & typeof defaultProps & NativeAttrs

const Button = React.forwardRef<HTMLButtonElement, React.PropsWithChildren<ButtonProps>>(
  ({ ...btnProps }, ref: React.Ref<HTMLButtonElement | null>) => {
    const theme = useTheme()
    const buttonRef = useRef<HTMLButtonElement>(null)
    useImperativeHandle(ref, () => buttonRef.current)

    const [dripShow, setDripShow] = useState<boolean>(false)
    const [dripX, setDripX] = useState<number>(0)
    const [dripY, setDripY] = useState<number>(0)
    const groupConfig = useButtonGroupContext()
    const filteredProps = filterPropsWithGroup(btnProps, groupConfig)
    /* eslint-disable @typescript-eslint/no-unused-vars */
    const {
      children,
      disabled,
      type,
      loading,
      shadow,
      ghost,
      effect,
      onClick,
      auto,
      size,
      icon,
      htmlType,
      iconRight,
      className,
      ...props
    } = filteredProps
    /* eslint-enable @typescript-eslint/no-unused-vars */

    const { bg, border, color } = useMemo(() => getButtonColors(theme.palette, filteredProps), [
      theme.palette,
      filteredProps,
    ])
    const hover = useMemo(() => getButtonHoverColors(theme.palette, filteredProps), [
      theme.palette,
      filteredProps,
    ])
    const { cursor, events } = useMemo(() => getButtonCursor(disabled, loading), [
      disabled,
      loading,
    ])
    const { height, minWidth, padding, width, fontSize } = useMemo(
      () => getButtonSize(size, auto),
      [size, auto],
    )
    const dripColor = useMemo(() => getButtonDripColor(theme.palette, filteredProps), [
      theme.palette,
      filteredProps,
    ])

    /* istanbul ignore next */
    const dripCompletedHandle = () => {
      setDripShow(false)
      setDripX(0)
      setDripY(0)
    }

    const clickHandler = (event: MouseEvent<HTMLButtonElement>) => {
      if (disabled || loading) return
      const showDrip = !shadow && !ghost && effect
      /* istanbul ignore next */
      if (showDrip && buttonRef.current) {
        const rect = buttonRef.current.getBoundingClientRect()
        setDripShow(true)
        setDripX(event.clientX - rect.left)
        setDripY(event.clientY - rect.top)
      }

      onClick && onClick(event)
    }

    const childrenWithIcon = useMemo(
      () =>
        getButtonChildrenWithIcon(auto, size, children, {
          icon,
          iconRight,
        }),
      [auto, size, children, icon, iconRight],
    )

    return (
      <button
        ref={buttonRef}
        type={htmlType}
        className={`btn ${className}`}
        disabled={disabled}
        onClick={clickHandler}
        {...props}>
        {loading && <ButtonLoading color={color} />}
        {childrenWithIcon}
        {dripShow && (
          <ButtonDrip x={dripX} y={dripY} color={dripColor} onCompleted={dripCompletedHandle} />
        )}
        <style jsx>{`
          .btn {
            box-sizing: border-box;
            display: inline-block;
            padding: 0 ${padding};
            height: ${height};
            line-height: ${height};
            min-width: ${minWidth};
            width: ${width};
            border-radius: ${theme.layout.radius};
            font-weight: 400;
            font-size: ${fontSize};
            user-select: none;
            outline: none;
            text-transform: capitalize;
            justify-content: center;
            text-align: center;
            white-space: nowrap;
            transition: background-color 200ms ease 0ms, box-shadow 200ms ease 0ms,
              border 200ms ease 0ms, color 200ms ease 0ms;
            position: relative;
            overflow: hidden;
            color: ${color};
            background-color: ${bg};
            border: 1px solid ${border};
            cursor: ${cursor};
            pointer-events: ${events};
            box-shadow: ${shadow ? theme.expressiveness.shadowSmall : 'none'};
            --geist-ui-button-padding: ${padding};
            --geist-ui-button-height: ${height};
            --geist-ui-button-color: ${color};
            --geist-ui-button-bg: ${bg};
          }

          .btn:hover,
          .btn:focus {
            color: ${hover.color};
            --geist-ui-button-color: ${hover.color};
            background-color: ${hover.bg};
            border-color: ${hover.border};
            cursor: ${cursor};
            pointer-events: ${events};
            box-shadow: ${shadow ? theme.expressiveness.shadowMedium : 'none'};
            transform: translate3d(0px, ${shadow ? '-1px' : '0px'}, 0px);
          }

          .btn :global(.text) {
            position: relative;
            z-index: 1;
            display: inline-flex;
            justify-content: center;
            align-items: center;
            text-align: center;
            line-height: inherit;
            top: -1px;
          }

          .btn :global(.text p),
          .btn :global(.text pre),
          .btn :global(.text div) {
            margin: 0;
          }
        `}</style>
      </button>
    )
  },
)

type ButtonComponent<T, P = {}> = React.ForwardRefExoticComponent<
  PropsWithoutRef<P> & RefAttributes<T>
>
type ComponentProps = Partial<typeof defaultProps> &
  Omit<Props, keyof typeof defaultProps> &
  NativeAttrs

Button.defaultProps = defaultProps

export default React.memo(Button) as ButtonComponent<HTMLButtonElement, ComponentProps>
