import PropTypes from '../_util/vue-types'
import ScrollNumber from './ScrollNumber'
import classNames from 'classnames'
import { initDefaultProps, filterEmpty, getComponentFromProp } from '../_util/props-util'
import { cloneElement } from '../_util/vnode'
import getTransitionProps from '../_util/getTransitionProps'
import isNumeric from '../_util/isNumeric'

export const BadgeProps = {
  /** Number to show in badge */
  count: PropTypes.any,
  showZero: PropTypes.bool,
  /** Max count to show */
  overflowCount: PropTypes.number,
  /** whether to show red dot without number */
  dot: PropTypes.bool,
  prefixCls: PropTypes.string,
  scrollNumberPrefixCls: PropTypes.string,
  status: PropTypes.oneOf(['success', 'processing', 'default', 'error', 'warning']),
  text: PropTypes.string,
  offset: PropTypes.array,
  numberStyle: PropTypes.object.def({}),
  title: PropTypes.string,
}

export default {
  name: 'ABadge',
  props: initDefaultProps(BadgeProps, {
    prefixCls: 'ant-badge',
    scrollNumberPrefixCls: 'ant-scroll-number',
    showZero: false,
    dot: false,
    overflowCount: 99,
  }),
  methods: {
    getBadgeClassName () {
      const { prefixCls, status } = this.$props
      const children = filterEmpty(this.$slots.default)
      return classNames(prefixCls, {
        [`${prefixCls}-status`]: !!status,
        [`${prefixCls}-not-a-wrapper`]: !children.length,
      })
    },

    isZero () {
      const numberedDispayCount = this.getNumberedDispayCount()
      return numberedDispayCount === '0' || numberedDispayCount === 0
    },

    isDot () {
      const { dot, status } = this.$props
      const isZero = this.isZero()
      return (dot && !isZero) || status
    },

    isHidden () {
      const { showZero } = this.$props
      const displayCount = this.getDispayCount()
      const isZero = this.isZero()
      const isDot = this.isDot()
      const isEmpty = displayCount === null || displayCount === undefined || displayCount === ''
      return (isEmpty || (isZero && !showZero)) && !isDot
    },

    getNumberedDispayCount () {
      const { overflowCount } = this.$props
      const count = this.badgeCount
      const displayCount =
        count > overflowCount ? `${overflowCount}+` : count
      return displayCount
    },

    getDispayCount () {
      const isDot = this.isDot()
      // dot mode don't need count
      if (isDot) {
        return ''
      }
      return this.getNumberedDispayCount()
    },

    getScollNumberTitle () {
      const { title } = this.$props
      const count = this.badgeCount
      if (title) {
        return title
      }
      return typeof count === 'string' || typeof count === 'number' ? count : undefined
    },

    getStyleWithOffset () {
      const { offset, numberStyle } = this.$props
      return offset
        ? {
          right: `${-parseInt(offset[0], 10)}px`,
          marginTop: isNumeric(offset[1]) ? `${offset[1]}px` : offset[1],
          ...numberStyle,
        }
        : numberStyle
    },

    renderStatusText () {
      const { prefixCls, text } = this.$props
      const hidden = this.isHidden()
      return hidden || !text ? null : <span class={`${prefixCls}-status-text`}>{text}</span>
    },

    renderDispayComponent () {
      const count = this.badgeCount
      const customNode = count
      if (!customNode || typeof customNode !== 'object') {
        return undefined
      }
      return cloneElement(customNode, {
        style: this.getStyleWithOffset(),
      })
    },

    renderBadgeNumber () {
      const { prefixCls, scrollNumberPrefixCls, status } = this.$props
      const count = this.badgeCount
      const displayCount = this.getDispayCount()
      const isDot = this.isDot()
      const hidden = this.isHidden()

      const scrollNumberCls = {
        [`${prefixCls}-dot`]: isDot,
        [`${prefixCls}-count`]: !isDot,
        [`${prefixCls}-multiple-words`]:
          !isDot && count && count.toString && count.toString().length > 1,
        [`${prefixCls}-status-${status}`]: !!status,
      }

      return hidden ? null : (
        <ScrollNumber
          prefixCls={scrollNumberPrefixCls}
          data-show={!hidden}
          v-show={!hidden}
          className={scrollNumberCls}
          count={displayCount}
          displayComponent={this.renderDispayComponent()} // <Badge status="success" count={<Icon type="xxx" />}></Badge>
          title={this.getScollNumberTitle()}
          style={this.getStyleWithOffset()}
          key='scrollNumber'
        />
      )
    },
  },

  render () {
    const {
      prefixCls,
      status,
      text,
      $slots,
    } = this
    const children = filterEmpty($slots.default)
    let count = getComponentFromProp(this, 'count')
    if (Array.isArray(count)) {
      count = count[0]
    }
    this.badgeCount = count
    const scrollNumber = this.renderBadgeNumber()
    const statusText = this.renderStatusText()
    const statusCls = classNames({
      [`${prefixCls}-status-dot`]: !!status,
      [`${prefixCls}-status-${status}`]: !!status,
    })

    // <Badge status="success" />
    if (!children.length && status) {
      return (
        <span
          {...{ on: this.$listeners }}
          class={this.getBadgeClassName()}
          style={this.getStyleWithOffset()}
        >
          <span class={statusCls} />
          <span class={`${prefixCls}-status-text`}>{text}</span>
        </span>
      )
    }

    const transitionProps = getTransitionProps(children.length ? `${prefixCls}-zoom` : '')

    return (<span {...{ on: this.$listeners }} class={this.getBadgeClassName()}>
      {children}
      <transition {...transitionProps}>
        {scrollNumber}
      </transition>
      {statusText}
    </span>)
  },
}