import PropTypes from '../_util/vue-types'
import BaseMixin from '../_util/BaseMixin'
import Trigger from '../trigger'
import Panel from './Panel'
import placements from './placements'
import moment from 'moment'
import { initDefaultProps, hasProp } from '../_util/props-util'

function noop () {
}

export default {
  mixins: [BaseMixin],
  name: 'VcTimePicker',
  props: initDefaultProps({
    prefixCls: PropTypes.string,
    clearText: PropTypes.string,
    value: PropTypes.any,
    defaultOpenValue: {
      type: Object,
      default: () => {
        return moment()
      },
    },
    inputReadOnly: PropTypes.bool,
    disabled: PropTypes.bool,
    allowEmpty: PropTypes.bool,
    defaultValue: PropTypes.any,
    open: PropTypes.bool,
    defaultOpen: PropTypes.bool,
    align: PropTypes.object,
    placement: PropTypes.any,
    transitionName: PropTypes.string,
    getPopupContainer: PropTypes.func,
    placeholder: PropTypes.string,
    format: PropTypes.string,
    showHour: PropTypes.bool,
    showMinute: PropTypes.bool,
    showSecond: PropTypes.bool,
    popupClassName: PropTypes.string,
    disabledHours: PropTypes.func,
    disabledMinutes: PropTypes.func,
    disabledSeconds: PropTypes.func,
    hideDisabledOptions: PropTypes.bool,
    // onChange: PropTypes.func,
    // onOpen: PropTypes.func,
    // onClose: PropTypes.func,
    // onFocus: PropTypes.func,
    // onBlur: PropTypes.func,
    name: PropTypes.string,
    autoComplete: PropTypes.string,
    use12Hours: PropTypes.bool,
    hourStep: PropTypes.number,
    minuteStep: PropTypes.number,
    secondStep: PropTypes.number,
    focusOnOpen: PropTypes.bool,
    // onKeyDown: PropTypes.func,
    autoFocus: PropTypes.bool,
    id: PropTypes.string,
  }, {
    clearText: 'clear',
    prefixCls: 'rc-time-picker',
    defaultOpen: false,
    inputReadOnly: false,
    popupClassName: '',
    align: {},
    id: '',
    allowEmpty: true,
    showHour: true,
    showMinute: true,
    showSecond: true,
    disabledHours: noop,
    disabledMinutes: noop,
    disabledSeconds: noop,
    hideDisabledOptions: false,
    placement: 'bottomLeft',
    use12Hours: false,
    focusOnOpen: false,
  }),
  data () {
    const { defaultOpen, defaultValue, open = defaultOpen, value = defaultValue } = this
    return {
      sOpen: open,
      sValue: value,
    }
  },
  mounted () {
    this.$nextTick(() => {
      if (this.autoFocus) {
        this.focus()
      }
    })
  },

  watch: {
    value (val) {
      this.setState({
        sValue: val,
      })
    },
    open (val) {
      if (val !== undefined) {
        this.setState({
          sOpen: val,
        })
      }
    },
  },
  methods: {
    onPanelChange (value) {
      this.setValue(value)
    },

    onPanelClear () {
      this.setValue(null)
      this.setOpen(false)
    },

    onVisibleChange (open) {
      this.setOpen(open)
    },

    onEsc () {
      this.setOpen(false)
      this.focus()
    },

    onKeyDown (e) {
      if (e.keyCode === 40) {
        this.setOpen(true)
      }
    },
    onKeyDown2 (e) {
      this.__emit('keydown', e)
    },

    setValue (value) {
      if (!hasProp(this, 'value')) {
        this.setState({
          sValue: value,
        })
      }
      this.__emit('change', value)
    },

    getFormat () {
      const { format, showHour, showMinute, showSecond, use12Hours } = this
      if (format) {
        return format
      }

      if (use12Hours) {
        const fmtString = ([
          showHour ? 'h' : '',
          showMinute ? 'mm' : '',
          showSecond ? 'ss' : '',
        ].filter(item => !!item).join(':'))

        return fmtString.concat(' a')
      }

      return [
        showHour ? 'HH' : '',
        showMinute ? 'mm' : '',
        showSecond ? 'ss' : '',
      ].filter(item => !!item).join(':')
    },

    getPanelElement () {
      const {
        prefixCls, placeholder, disabledHours,
        disabledMinutes, disabledSeconds, hideDisabledOptions, inputReadOnly,
        allowEmpty, showHour, showMinute, showSecond, defaultOpenValue, clearText,
        use12Hours, focusOnOpen, onKeyDown2, hourStep, minuteStep, secondStep,
        sValue,
      } = this
      return (
        <Panel
          clearText={clearText}
          prefixCls={`${prefixCls}-panel`}
          ref='panel'
          value={sValue}
          inputReadOnly={inputReadOnly}
          onChange={this.onPanelChange}
          onClear={this.onPanelClear}
          defaultOpenValue={defaultOpenValue}
          showHour={showHour}
          showMinute={showMinute}
          showSecond={showSecond}
          onEsc={this.onEsc}
          allowEmpty={allowEmpty}
          format={this.getFormat()}
          placeholder={placeholder}
          disabledHours={disabledHours}
          disabledMinutes={disabledMinutes}
          disabledSeconds={disabledSeconds}
          hideDisabledOptions={hideDisabledOptions}
          use12Hours={use12Hours}
          hourStep={hourStep}
          minuteStep={minuteStep}
          secondStep={secondStep}
          focusOnOpen={focusOnOpen}
          onKeyDown={onKeyDown2}
        >
          {this.$slots.addon}
        </Panel>
      )
    },

    getPopupClassName () {
      const { showHour, showMinute, showSecond, use12Hours, prefixCls } = this
      let popupClassName = this.popupClassName
      // Keep it for old compatibility
      if ((!showHour || !showMinute || !showSecond) && !use12Hours) {
        popupClassName += ` ${prefixCls}-panel-narrow`
      }
      let selectColumnCount = 0
      if (showHour) {
        selectColumnCount += 1
      }
      if (showMinute) {
        selectColumnCount += 1
      }
      if (showSecond) {
        selectColumnCount += 1
      }
      if (use12Hours) {
        selectColumnCount += 1
      }
      popupClassName += ` ${prefixCls}-panel-column-${selectColumnCount}`
      return popupClassName
    },

    setOpen (open) {
      if (this.sOpen !== open) {
        if (!hasProp(this, 'open')) {
          this.setState({ sOpen: open })
        }
        if (open) {
          this.__emit('open', { open })
        } else {
          this.__emit('close', { open })
        }
      }
    },

    focus () {
      this.$refs.picker.focus()
    },

    blur () {
      this.$refs.picker.blur()
    },
    onFocus (e) {
      this.__emit('focus', e)
    },
    onBlur (e) {
      this.__emit('blur', e)
    },
  },

  render () {
    const {
      prefixCls, placeholder, placement, align, id,
      disabled, transitionName, getPopupContainer, name, autoComplete,
      autoFocus, inputReadOnly, sOpen, sValue, onFocus, onBlur,
    } = this
    const popupClassName = this.getPopupClassName()
    return (
      <Trigger
        prefixCls={`${prefixCls}-panel`}
        popupClassName={popupClassName}
        popupAlign={align}
        builtinPlacements={placements}
        popupPlacement={placement}
        action={disabled ? [] : ['click']}
        destroyPopupOnHide
        getPopupContainer={getPopupContainer}
        popupTransitionName={transitionName}
        popupVisible={sOpen}
        onPopupVisibleChange={this.onVisibleChange}
      >
        <template slot='popup'>
          {this.getPanelElement()}
        </template>
        <span class={`${prefixCls}`}>
          <input
            class={`${prefixCls}-input`}
            ref='picker'
            type='text'
            placeholder={placeholder}
            name={name}
            onKeydown={this.onKeyDown}
            disabled={disabled}
            value={sValue && sValue.format(this.getFormat()) || ''}
            autoComplete={autoComplete}
            onFocus={onFocus}
            onBlur={onBlur}
            autoFocus={autoFocus}
            readOnly={!!inputReadOnly}
            id={id}
          />
          <span class={`${prefixCls}-icon`}/>
        </span>
      </Trigger>
    )
  },
}