import PropTypes from '../_util/vue-types'
import { initDefaultProps, getComponentFromProp } from '../_util/props-util'
import classNames from 'classnames'

export const AnchorLinkProps = {
  prefixCls: PropTypes.string,
  href: PropTypes.string,
  title: PropTypes.any,
}

export default {
  name: 'AAnchorLink',
  props: initDefaultProps(AnchorLinkProps, {
    prefixCls: 'ant-anchor',
    href: '#',
  }),
  inject: {
    antAnchor: { default: {}},
    antAnchorContext: { default: {}},
  },

  mounted () {
    this.antAnchor.registerLink(this.href)
  },

  beforeDestroy () {
    this.antAnchor.unregisterLink(this.href)
  },
  watch: {
    href (val, oldVal) {
      this.antAnchor.unregisterLink(oldVal)
      this.antAnchor.registerLink(val)
    },
  },
  methods: {
    handleClick (e) {
      this.antAnchor.scrollTo(this.href)
      const { scrollTo } = this.antAnchor
      const { href, title } = this.$props
      if (this.antAnchorContext.$emit) {
        this.antAnchorContext.$emit('click', e, { title, href })
      }
      scrollTo(href)
    },
  },
  render () {
    const {
      prefixCls,
      href,
      $slots,
    } = this
    const title = getComponentFromProp(this, 'title')
    const active = this.antAnchor.$data.activeLink === href
    const wrapperClassName = classNames(`${prefixCls}-link`, {
      [`${prefixCls}-link-active`]: active,
    })
    const titleClassName = classNames(`${prefixCls}-link-title`, {
      [`${prefixCls}-link-title-active`]: active,
    })
    return (
      <div class={wrapperClassName}>
        <a
          class={titleClassName}
          href={href}
          title={typeof title === 'string' ? title : ''}
          onClick={this.handleClick}
        >
          {title}
        </a>
        {$slots.default}
      </div>
    )
  },
}