// 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
}

import classNames from 'classnames'
import PropTypes from '../_util/vue-types'
import Icon from '../icon'
import { initDefaultProps, getOptionProps, hasProp, getComponentFromProp } from '../_util/props-util'
import BaseMixin from '../_util/BaseMixin'
import isNumeric from '../_util/isNumeric'

const dimensionMap = {
  xs: '480px',
  sm: '576px',
  md: '768px',
  lg: '992px',
  xl: '1200px',
  xxl: '1600px',
}

// export type CollapseType = 'clickTrigger' | 'responsive';

export const SiderProps = {
  prefixCls: PropTypes.string,
  collapsible: PropTypes.bool,
  collapsed: PropTypes.bool,
  defaultCollapsed: PropTypes.bool,
  reverseArrow: PropTypes.bool,
  // onCollapse?: (collapsed: boolean, type: CollapseType) => void;
  trigger: PropTypes.any,
  width: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
  collapsedWidth: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
  breakpoint: PropTypes.oneOf(['xs', 'sm', 'md', 'lg', 'xl', 'xxl']),
  theme: PropTypes.oneOf(['light', 'dark']).def('dark'),
}

// export interface SiderState {
//   collapsed?: boolean;
//   below: boolean;
//   belowShow?: boolean;
// }

// export interface SiderContext {
//   siderCollapsed: boolean;
// }

const generateId = (() => {
  let i = 0
  return (prefix = '') => {
    i += 1
    return `${prefix}${i}`
  }
})()

export default {
  name: 'ALayoutSider',
  __ANT_LAYOUT_SIDER: true,
  mixins: [BaseMixin],
  props: initDefaultProps(SiderProps, {
    prefixCls: 'ant-layout-sider',
    collapsible: false,
    defaultCollapsed: false,
    reverseArrow: false,
    width: 200,
    collapsedWidth: 80,
  }),

  // static childContextTypes = {
  //   siderCollapsed: PropTypes.bool,
  //   collapsedWidth: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),
  // };

  // static contextTypes = {
  //   siderHook: PropTypes.object,
  // };

  // private mql: MediaQueryList;
  // private uniqueId: string;

  data () {
    this.uniqueId = generateId('ant-sider-')
    let matchMedia
    if (typeof window !== 'undefined') {
      matchMedia = window.matchMedia
    }
    const props = getOptionProps(this)
    if (matchMedia && props.breakpoint && props.breakpoint in dimensionMap) {
      this.mql = matchMedia(`(max-width: ${dimensionMap[props.breakpoint]})`)
    }
    let sCollapsed
    if ('collapsed' in props) {
      sCollapsed = props.collapsed
    } else {
      sCollapsed = props.defaultCollapsed
    }
    return {
      sCollapsed,
      below: false,
      belowShow: false,
    }
  },
  provide () {
    return {
      layoutSiderContext: this, // menu组件中使用
    }
  },
  inject: {
    siderHook: { default: {}},
  },
  // getChildContext() {
  //   return {
  //     siderCollapsed: this.state.collapsed,
  //     collapsedWidth: this.props.collapsedWidth,
  //   };
  // }
  watch: {
    collapsed (val) {
      this.setState({
        sCollapsed: val,
      })
    },
  },

  mounted () {
    this.$nextTick(() => {
      if (this.mql) {
        this.mql.addListener(this.responsiveHandler)
        this.responsiveHandler(this.mql)
      }

      if (this.siderHook.addSider) {
        this.siderHook.addSider(this.uniqueId)
      }
    })
  },

  beforeDestroy () {
    if (this.mql) {
      this.mql.removeListener(this.responsiveHandler)
    }

    if (this.siderHook.removeSider) {
      this.siderHook.removeSider(this.uniqueId)
    }
  },
  model: {
    prop: 'collapsed',
    event: 'collapse',
  },
  methods: {
    responsiveHandler (mql) {
      this.setState({ below: mql.matches })
      this.$emit('breakpoint', mql.matches)
      if (this.sCollapsed !== mql.matches) {
        this.setCollapsed(mql.matches, 'responsive')
      }
    },

    setCollapsed (collapsed, type) {
      if (!hasProp(this, 'collapsed')) {
        this.setState({
          sCollapsed: collapsed,
        })
      }
      this.$emit('collapse', collapsed, type)
    },

    toggle () {
      const collapsed = !this.sCollapsed
      this.setCollapsed(collapsed, 'clickTrigger')
    },

    belowShowChange () {
      this.setState({ belowShow: !this.belowShow })
    },
  },

  render () {
    const { prefixCls, theme,
      collapsible, reverseArrow, width, collapsedWidth,
    } = getOptionProps(this)
    const trigger = getComponentFromProp(this, 'trigger')
    const rawWidth = this.sCollapsed ? collapsedWidth : width
    // use "px" as fallback unit for width
    const siderWidth = isNumeric(rawWidth) ? `${rawWidth}px` : String(rawWidth)
    // special trigger when collapsedWidth == 0
    const zeroWidthTrigger = parseFloat(String(collapsedWidth || 0)) === 0 ? (
      <span onClick={this.toggle} class={`${prefixCls}-zero-width-trigger`}>
        <Icon type='bars' />
      </span>
    ) : null
    const iconObj = {
      'expanded': reverseArrow ? <Icon type='right' /> : <Icon type='left' />,
      'collapsed': reverseArrow ? <Icon type='left' /> : <Icon type='right' />,
    }
    const status = this.sCollapsed ? 'collapsed' : 'expanded'
    const defaultTrigger = iconObj[status]
    const triggerDom = (
      trigger !== null
        ? zeroWidthTrigger || (
          <div class={`${prefixCls}-trigger`} onClick={this.toggle} style={{ width: siderWidth }}>
            {trigger || defaultTrigger}
          </div>
        ) : null
    )
    const divStyle = {
      // ...style,
      flex: `0 0 ${siderWidth}`,
      maxWidth: siderWidth, // Fix width transition bug in IE11
      minWidth: siderWidth, // https://github.com/ant-design/ant-design/issues/6349
      width: siderWidth,
    }
    const siderCls = classNames(prefixCls, `${prefixCls}-${theme}`, {
      [`${prefixCls}-collapsed`]: !!this.sCollapsed,
      [`${prefixCls}-has-trigger`]: collapsible && trigger !== null && !zeroWidthTrigger,
      [`${prefixCls}-below`]: !!this.below,
      [`${prefixCls}-zero-width`]: parseFloat(siderWidth) === 0,
    })
    const divProps = {
      on: this.$listeners,
      class: siderCls,
      style: divStyle,
    }
    return (
      <div {...divProps}>
        <div class={`${prefixCls}-children`}>{this.$slots.default}</div>
        {collapsible || (this.below && zeroWidthTrigger) ? triggerDom : null}
      </div>
    )
  },
}