import PropTypes from '../_util/vue-types'
import debounce from 'lodash/debounce'
import { initDefaultProps, getComponentFromProp, filterEmpty } from '../_util/props-util'

// matchMedia polyfill for
// https://github.com/WickyNilliams/enquire.js/issues/82
if (typeof window !== 'undefined') {
  const matchMediaPolyfill = (mediaQuery) => {
    return {
      media: mediaQuery,
      matches: false,
      addListener () {
      },
      removeListener () {
      },
    }
  }
  window.matchMedia = window.matchMedia || matchMediaPolyfill
}
// Use require over import (will be lifted up)
// make sure matchMedia polyfill run before require('vc-slick')
// Fix https://github.com/ant-design/ant-design/issues/6560
// Fix https://github.com/ant-design/ant-design/issues/3308
const SlickCarousel = require('../vc-slick/src').default

export const CarouselEffect = PropTypes.oneOf(['scrollx', 'fade'])
// Carousel
export const CarouselProps = {
  effect: CarouselEffect,
  dots: PropTypes.bool,
  vertical: PropTypes.bool,
  autoplay: PropTypes.bool,
  easing: PropTypes.string,
  beforeChange: PropTypes.func,
  afterChange: PropTypes.func,
  // style: PropTypes.React.CSSProperties,
  prefixCls: PropTypes.string,
  accessibility: PropTypes.bool,
  nextArrow: PropTypes.any,
  prevArrow: PropTypes.any,
  pauseOnHover: PropTypes.bool,
  // className: PropTypes.string,
  adaptiveHeight: PropTypes.bool,
  arrows: PropTypes.bool,
  autoplaySpeed: PropTypes.number,
  centerMode: PropTypes.bool,
  centerPadding: PropTypes.string,
  cssEase: PropTypes.string,
  dotsClass: PropTypes.string,
  draggable: PropTypes.bool,
  fade: PropTypes.bool,
  focusOnSelect: PropTypes.bool,
  infinite: PropTypes.bool,
  initialSlide: PropTypes.number,
  lazyLoad: PropTypes.bool,
  rtl: PropTypes.bool,
  slide: PropTypes.string,
  slidesToShow: PropTypes.number,
  slidesToScroll: PropTypes.number,
  speed: PropTypes.number,
  swipe: PropTypes.bool,
  swipeToSlide: PropTypes.bool,
  touchMove: PropTypes.bool,
  touchThreshold: PropTypes.number,
  variableWidth: PropTypes.bool,
  useCSS: PropTypes.bool,
  slickGoTo: PropTypes.number,
}

const Carousel = {
  name: 'ACarousel',
  props: initDefaultProps(CarouselProps, {
    dots: true,
    arrows: false,
    prefixCls: 'ant-carousel',
    draggable: false,
  }),

  // innerSlider: any;

  // private slick: any;

  beforeMount () {
    this.onWindowResized = debounce(this.onWindowResized, 500, {
      leading: false,
    })
  },

  mounted () {
    const { autoplay } = this
    if (autoplay) {
      window.addEventListener('resize', this.onWindowResized)
    }
    // https://github.com/ant-design/ant-design/issues/7191
    this.innerSlider = this.$refs.slick && this.$refs.slick.innerSlider
  },

  beforeDestroy () {
    const { autoplay } = this
    if (autoplay) {
      window.removeEventListener('resize', this.onWindowResized)
      this.onWindowResized.cancel()
    }
  },
  methods: {
    onWindowResized () {
      // Fix https://github.com/ant-design/ant-design/issues/2550
      const { autoplay } = this
      if (autoplay && this.$refs.slick && this.$refs.slick.innerSlider && this.$refs.slick.innerSlider.autoPlay) {
        this.$refs.slick.innerSlider.autoPlay()
      }
    },

    next () {
      this.$refs.slick.slickNext()
    },

    prev () {
      this.$refs.slick.slickPrev()
    },

    goTo (slide, dontAnimate = false) {
      this.$refs.slick.slickGoTo(slide, dontAnimate)
    },
  },

  render () {
    const props = {
      ...this.$props,
    }
    const { $slots, $listeners } = this

    if (props.effect === 'fade') {
      props.fade = true
    }

    let className = props.prefixCls
    if (props.vertical) {
      className = `${className} ${className}-vertical`
    }
    const SlickCarouselProps = {
      props: {
        ...props,
        nextArrow: getComponentFromProp(this, 'nextArrow'),
        prevArrow: getComponentFromProp(this, 'prevArrow'),
      },
      on: $listeners,
      scopedSlots: this.$scopedSlots,
    }

    return (
      <div class={className}>
        <SlickCarousel ref='slick' {...SlickCarouselProps}>
          {filterEmpty($slots.default)}
        </SlickCarousel>
      </div>
    )
  },
}

/* istanbul ignore next */
Carousel.install = function (Vue) {
  Vue.component(Carousel.name, Carousel)
}

export default Carousel