/**
 * Since search box is in different position with different mode.
 * - Single: in the popup box
 * - multiple: in the selector
 * Move the code as a SearchInput for easy management.
 */

import PropTypes from '../../_util/vue-types'
import { createRef } from './util'

const SearchInput = {
  name: 'SearchInput',
  props: {
    open: PropTypes.bool,
    searchValue: PropTypes.string,
    prefixCls: PropTypes.string,
    disabled: PropTypes.bool,
    renderPlaceholder: PropTypes.func,
    needAlign: PropTypes.bool,
    ariaId: PropTypes.string,
  },
  inject: {
    vcTreeSelect: { default: {}},
  },

  created () {
    this.inputRef = createRef()
    this.mirrorInputRef = createRef()
    this.prevProps = { ...this.$props }
  },
  mounted () {
    this.$nextTick(() => {
      const { open, needAlign } = this.$props
      if (needAlign) {
        this.alignInputWidth()
      }

      if (open) {
        this.focus(true)
      }
    })
  },

  updated () {
    const { open, searchValue, needAlign } = this.$props
    const { prevProps } = this
    this.$nextTick(() => {
      if (open && prevProps.open !== open) {
        this.focus()
      }
      if (needAlign && searchValue !== prevProps.searchValue) {
        this.alignInputWidth()
      }
      this.prevProps = { ...this.$props }
    })
  },
  methods: {
    /**
   * `scrollWidth` is not correct in IE, do the workaround.
   * ref: https://github.com/react-component/tree-select/issues/65
   *  clientWidth 0 when mounted in vue. why?
   */
    alignInputWidth () {
      this.inputRef.current.style.width =
      `${this.mirrorInputRef.current.clientWidth || this.mirrorInputRef.current.offsetWidth}px`
    },

    /**
   * Need additional timeout for focus cause parent dom is not ready when didMount trigger
   */
    focus (isDidMount) {
      if (this.inputRef.current) {
        if (isDidMount) {
          setTimeout(() => {
            this.inputRef.current.focus()
          }, 0)
        } else { // set it into else, Avoid scrolling when focus
          this.inputRef.current.focus()
        }
      }
    },

    blur () {
      if (this.inputRef.current) {
        this.inputRef.current.blur()
      }
    },
  },

  render () {
    const { searchValue, prefixCls, disabled, renderPlaceholder, open, ariaId } = this.$props
    const { vcTreeSelect: {
      onSearchInputChange, onSearchInputKeyDown,
    }} = this
    return (
      <span class={`${prefixCls}-search__field__wrap`}>
        <input
          type='text'
          {...{ directives: [{
            name: 'ant-ref',
            value: this.inputRef,
          }] }}
          onInput={onSearchInputChange}
          onKeydown={onSearchInputKeyDown}
          value={searchValue}
          disabled={disabled}
          class={`${prefixCls}-search__field`}
          aria-label='filter select'
          aria-autocomplete='list'
          aria-controls={open ? ariaId : undefined}
          aria-multiline='false'
        />
        <span
          {...{ directives: [{
            name: 'ant-ref',
            value: this.mirrorInputRef,
          }] }}
          class={`${prefixCls}-search__field__mirror`}
        >
          {searchValue}&nbsp;
        </span>
        {renderPlaceholder ? renderPlaceholder() : null}
      </span>
    )
  },
}

export default SearchInput