/**
 * Input Box is in different position for different mode.
 * This not the same design as `Select` cause it's followed by antd 0.x `Select`.
 * We will not follow the new design immediately since antd 3.x is already released.
 *
 * So this file named as Selector to avoid confuse.
 */
import { createRef } from '../util'
import PropTypes from '../../../_util/vue-types'
import classNames from 'classnames'
import { initDefaultProps, getComponentFromProp } from '../../../_util/props-util'
import BaseMixin from '../../../_util/BaseMixin'
export const selectorPropTypes = () => ({
  prefixCls: PropTypes.string,
  className: PropTypes.string,
  open: PropTypes.bool,
  valueList: PropTypes.array, // Name as valueList to diff the single value
  allowClear: PropTypes.bool,
  showArrow: PropTypes.bool,
  // onClick: PropTypes.func,
  // onBlur: PropTypes.func,
  // onFocus: PropTypes.func,
  removeSelected: PropTypes.func,
  choiceTransitionName: PropTypes.string,
  // Pass by component
  ariaId: PropTypes.string,
  inputIcon: PropTypes.any,
  clearIcon: PropTypes.any,
  removeIcon: PropTypes.any,
  selectorValueList: PropTypes.array,
  placeholder: PropTypes.any,
  disabled: PropTypes.bool,
  focused: PropTypes.bool,
})

function noop () {}
export default function (modeName) {
  const BaseSelector = {
    name: 'BaseSelector',
    mixins: [BaseMixin],
    props: initDefaultProps({
      ...selectorPropTypes(),

      // Pass by HOC
      renderSelection: PropTypes.func.isRequired,
      renderPlaceholder: PropTypes.func,
      tabIndex: PropTypes.number,
    }, {
      tabIndex: 0,
    }),
    inject: {
      vcTreeSelect: { default: {}},
    },
    created () {
      this.domRef = createRef()
    },
    methods: {
      onFocus  (e) {
        const { focused } = this.$props
        const { vcTreeSelect: { onSelectorFocus }} = this

        if (!focused) {
          onSelectorFocus()
        }
        this.__emit('focus', e)
      },

      onBlur (e) {
        const { vcTreeSelect: { onSelectorBlur }} = this

        // TODO: Not trigger when is inner component get focused
        onSelectorBlur()
        this.__emit('blur', e)
      },

      focus  () {
        this.domRef.current.focus()
      },

      blur  () {
        this.domRef.current.blur()
      },

      renderClear () {
        const { prefixCls, allowClear, valueList } = this.$props
        const { vcTreeSelect: { onSelectorClear }} = this

        if (!allowClear || !valueList.length || !valueList[0].value) {
          return null
        }
        const clearIcon = getComponentFromProp(this, 'clearIcon')
        return (
          <span
            key='clear'
            class={`${prefixCls}-selection__clear`}
            onClick={onSelectorClear}
          >
            {clearIcon}
          </span>
        )
      },

      renderArrow () {
        const { prefixCls, showArrow } = this.$props
        if (!showArrow) {
          return null
        }
        const inputIcon = getComponentFromProp(this, 'inputIcon')
        return (
          <span
            key='arrow'
            class={`${prefixCls}-arrow`}
            style={{ outline: 'none' }}
          >
            {inputIcon}
          </span>
        )
      },
    },

    render () {
      const {
        prefixCls, className, style,
        open, focused, disabled, allowClear,
        ariaId,
        renderSelection, renderPlaceholder,
        tabIndex,
      } = this.$props
      const { vcTreeSelect: { onSelectorKeyDown }, $listeners } = this

      let myTabIndex = tabIndex
      if (disabled) {
        myTabIndex = null
      }

      return (
        <span
          style={style}
          onClick={$listeners.click || noop}
          class={classNames(
            className,
            prefixCls,
            {
              [`${prefixCls}-open`]: open,
              [`${prefixCls}-focused`]: open || focused,
              [`${prefixCls}-disabled`]: disabled,
              [`${prefixCls}-enabled`]: !disabled,
              [`${prefixCls}-allow-clear`]: allowClear,
            }
          )}
          {...{
            directives: [{
              name: 'ant-ref',
              value: this.domRef,
            }],
          }}
          role='combobox'
          aria-expanded={open}
          aria-owns={open ? ariaId : undefined}
          aria-controls={open ? ariaId : undefined}
          aria-haspopup='listbox'
          aria-disabled={disabled}
          tabIndex={myTabIndex}
          onFocus={this.onFocus}
          onBlur={this.onBlur}
          onKeydown={onSelectorKeyDown}
        >
          <span
            key='selection'
            class={classNames(
              `${prefixCls}-selection`,
              `${prefixCls}-selection--${modeName}`
            )}
          >
            {renderSelection()}
            {this.renderClear()}
            {this.renderArrow()}

            {renderPlaceholder && renderPlaceholder()}
          </span>
        </span>
      )
    },
  }

  return BaseSelector
}