import PropTypes from '../../_util/vue-types';
import BaseMixin from '../../_util/BaseMixin';
import {
  getOptionProps,
  hasProp,
  mergeProps,
  getComponentFromProp,
  getListeners,
} from '../../_util/props-util';
import moment from 'moment';
import KeyCode from '../../_util/KeyCode';
import CalendarPart from './range-calendar/CalendarPart';
import TodayButton from './calendar/TodayButton';
import OkButton from './calendar/OkButton';
import TimePickerButton from './calendar/TimePickerButton';
import CommonMixin from './mixin/CommonMixin';
import enUs from './locale/en_US';
import { syncTime, getTodayTime, isAllowedDate } from './util/';
import { goTime, goStartMonth, goEndMonth, includesTime } from './util/toTime';

function noop() {}

function isEmptyArray(arr) {
  return Array.isArray(arr) && (arr.length === 0 || arr.every(i => !i));
}

function isArraysEqual(a, b) {
  if (a === b) return true;
  if (a === null || typeof a === 'undefined' || b === null || typeof b === 'undefined') {
    return false;
  }
  if (a.length !== b.length) return false;

  for (let i = 0; i < a.length; ++i) {
    if (a[i] !== b[i]) return false;
  }
  return true;
}

function getValueFromSelectedValue(selectedValue) {
  let [start, end] = selectedValue;
  if (end && (start === undefined || start === null)) {
    start = end.clone().subtract(1, 'month');
  }

  if (start && (end === undefined || end === null)) {
    end = start.clone().add(1, 'month');
  }
  return [start, end];
}

function normalizeAnchor(props, init) {
  const selectedValue = props.selectedValue || (init && props.defaultSelectedValue);
  const value = props.value || (init && props.defaultValue);
  const normalizedValue = value
    ? getValueFromSelectedValue(value)
    : getValueFromSelectedValue(selectedValue);
  return !isEmptyArray(normalizedValue)
    ? normalizedValue
    : init && [moment(), moment().add(1, 'months')];
}

function generateOptions(length, extraOptionGen) {
  const arr = extraOptionGen ? extraOptionGen().concat() : [];
  for (let value = 0; value < length; value++) {
    if (arr.indexOf(value) === -1) {
      arr.push(value);
    }
  }
  return arr;
}

function onInputSelect(direction, value, cause) {
  if (!value) {
    return;
  }
  const originalValue = this.sSelectedValue;
  const selectedValue = originalValue.concat();
  const index = direction === 'left' ? 0 : 1;
  selectedValue[index] = value;
  if (selectedValue[0] && this.compare(selectedValue[0], selectedValue[1]) > 0) {
    selectedValue[1 - index] = this.sShowTimePicker ? selectedValue[index] : undefined;
  }
  this.__emit('inputSelect', selectedValue);
  this.fireSelectValueChange(selectedValue, null, cause || { source: 'dateInput' });
}

const RangeCalendar = {
  props: {
    locale: PropTypes.object.def(enUs),
    visible: PropTypes.bool.def(true),
    prefixCls: PropTypes.string.def('rc-calendar'),
    dateInputPlaceholder: PropTypes.any,
    seperator: PropTypes.string.def('~'),
    defaultValue: PropTypes.any,
    value: PropTypes.any,
    hoverValue: PropTypes.any,
    mode: PropTypes.arrayOf(PropTypes.oneOf(['time', 'date', 'month', 'year', 'decade'])),
    showDateInput: PropTypes.bool.def(true),
    timePicker: PropTypes.any,
    showOk: PropTypes.bool,
    showToday: PropTypes.bool.def(true),
    defaultSelectedValue: PropTypes.array.def([]),
    selectedValue: PropTypes.array,
    showClear: PropTypes.bool,
    showWeekNumber: PropTypes.bool,
    // locale: PropTypes.object,
    // onChange: PropTypes.func,
    // onSelect: PropTypes.func,
    // onValueChange: PropTypes.func,
    // onHoverChange: PropTypes.func,
    // onPanelChange: PropTypes.func,
    format: PropTypes.oneOfType([PropTypes.string, PropTypes.arrayOf(PropTypes.string), PropTypes.func]),
    // onClear: PropTypes.func,
    type: PropTypes.any.def('both'),
    disabledDate: PropTypes.func,
    disabledTime: PropTypes.func.def(noop),
    renderFooter: PropTypes.func.def(() => null),
    renderSidebar: PropTypes.func.def(() => null),
    dateRender: PropTypes.func,
    clearIcon: PropTypes.any,
    inputReadOnly: PropTypes.bool,
  },

  mixins: [BaseMixin, CommonMixin],

  data() {
    const props = this.$props;
    const selectedValue = props.selectedValue || props.defaultSelectedValue;
    const value = normalizeAnchor(props, 1);
    return {
      sSelectedValue: selectedValue,
      prevSelectedValue: selectedValue,
      firstSelectedValue: null,
      sHoverValue: props.hoverValue || [],
      sValue: value,
      sShowTimePicker: false,
      sMode: props.mode || ['date', 'date'],
      sPanelTriggerSource: '', // Trigger by which picker panel: 'start' & 'end'
    };
  },
  watch: {
    value() {
      const newState = {};
      newState.sValue = normalizeAnchor(this.$props, 0);
      this.setState(newState);
    },
    hoverValue(val) {
      if (!isArraysEqual(this.sHoverValue, val)) {
        this.setState({ sHoverValue: val });
      }
    },
    selectedValue(val) {
      const newState = {};
      newState.sSelectedValue = val;
      newState.prevSelectedValue = val;
      this.setState(newState);
    },
    mode(val) {
      if (!isArraysEqual(this.sMode, val)) {
        this.setState({ sMode: val });
      }
    },
  },

  methods: {
    onDatePanelEnter() {
      if (this.hasSelectedValue()) {
        this.fireHoverValueChange(this.sSelectedValue.concat());
      }
    },

    onDatePanelLeave() {
      if (this.hasSelectedValue()) {
        this.fireHoverValueChange([]);
      }
    },

    onSelect(value) {
      const { type, sSelectedValue, prevSelectedValue, firstSelectedValue } = this;
      let nextSelectedValue;
      if (type === 'both') {
        if (!firstSelectedValue) {
          syncTime(prevSelectedValue[0], value);
          nextSelectedValue = [value];
        } else if (this.compare(firstSelectedValue, value) < 0) {
          syncTime(prevSelectedValue[1], value);
          nextSelectedValue = [firstSelectedValue, value];
        } else {
          syncTime(prevSelectedValue[0], value);
          syncTime(prevSelectedValue[1], firstSelectedValue);
          nextSelectedValue = [value, firstSelectedValue];
        }
      } else if (type === 'start') {
        syncTime(prevSelectedValue[0], value);
        const endValue = sSelectedValue[1];
        nextSelectedValue =
          endValue && this.compare(endValue, value) > 0 ? [value, endValue] : [value];
      } else {
        // type === 'end'
        const startValue = sSelectedValue[0];
        if (startValue && this.compare(startValue, value) <= 0) {
          syncTime(prevSelectedValue[1], value);
          nextSelectedValue = [startValue, value];
        } else {
          syncTime(prevSelectedValue[0], value);
          nextSelectedValue = [value];
        }
      }

      this.fireSelectValueChange(nextSelectedValue);
    },

    onKeyDown(event) {
      if (event.target.nodeName.toLowerCase() === 'input') {
        return;
      }

      const { keyCode } = event;
      const ctrlKey = event.ctrlKey || event.metaKey;

      const {
        sSelectedValue: selectedValue,
        sHoverValue: hoverValue,
        firstSelectedValue,
        sValue: value, // Value is used for `CalendarPart` current page
      } = this.$data;
      const { disabledDate } = this.$props;

      // Update last time of the picker
      const updateHoverPoint = func => {
        // Change hover to make focus in UI
        let currentHoverTime;
        let nextHoverTime;
        let nextHoverValue;

        if (!firstSelectedValue) {
          currentHoverTime = hoverValue[0] || selectedValue[0] || value[0] || moment();
          nextHoverTime = func(currentHoverTime);
          nextHoverValue = [nextHoverTime];
          this.fireHoverValueChange(nextHoverValue);
        } else {
          if (hoverValue.length === 1) {
            currentHoverTime = hoverValue[0].clone();
            nextHoverTime = func(currentHoverTime);
            nextHoverValue = this.onDayHover(nextHoverTime);
          } else {
            currentHoverTime = hoverValue[0].isSame(firstSelectedValue, 'day')
              ? hoverValue[1]
              : hoverValue[0];
            nextHoverTime = func(currentHoverTime);
            nextHoverValue = this.onDayHover(nextHoverTime);
          }
        }

        // Find origin hover time on value index
        if (nextHoverValue.length >= 2) {
          const miss = nextHoverValue.some(ht => !includesTime(value, ht, 'month'));
          if (miss) {
            const newValue = nextHoverValue.slice().sort((t1, t2) => t1.valueOf() - t2.valueOf());
            if (newValue[0].isSame(newValue[1], 'month')) {
              newValue[1] = newValue[0].clone().add(1, 'month');
            }
            this.fireValueChange(newValue);
          }
        } else if (nextHoverValue.length === 1) {
          // If only one value, let's keep the origin panel
          let oriValueIndex = value.findIndex(time => time.isSame(currentHoverTime, 'month'));
          if (oriValueIndex === -1) oriValueIndex = 0;

          if (value.every(time => !time.isSame(nextHoverTime, 'month'))) {
            const newValue = value.slice();
            newValue[oriValueIndex] = nextHoverTime.clone();
            this.fireValueChange(newValue);
          }
        }

        event.preventDefault();

        return nextHoverTime;
      };

      switch (keyCode) {
        case KeyCode.DOWN:
          updateHoverPoint(time => goTime(time, 1, 'weeks'));
          return;
        case KeyCode.UP:
          updateHoverPoint(time => goTime(time, -1, 'weeks'));
          return;
        case KeyCode.LEFT:
          if (ctrlKey) {
            updateHoverPoint(time => goTime(time, -1, 'years'));
          } else {
            updateHoverPoint(time => goTime(time, -1, 'days'));
          }
          return;
        case KeyCode.RIGHT:
          if (ctrlKey) {
            updateHoverPoint(time => goTime(time, 1, 'years'));
          } else {
            updateHoverPoint(time => goTime(time, 1, 'days'));
          }
          return;
        case KeyCode.HOME:
          updateHoverPoint(time => goStartMonth(time));
          return;
        case KeyCode.END:
          updateHoverPoint(time => goEndMonth(time));
          return;
        case KeyCode.PAGE_DOWN:
          updateHoverPoint(time => goTime(time, 1, 'month'));
          return;
        case KeyCode.PAGE_UP:
          updateHoverPoint(time => goTime(time, -1, 'month'));
          return;
        case KeyCode.ENTER: {
          let lastValue;
          if (hoverValue.length === 0) {
            lastValue = updateHoverPoint(time => time);
          } else if (hoverValue.length === 1) {
            lastValue = hoverValue[0];
          } else {
            lastValue = hoverValue[0].isSame(firstSelectedValue, 'day')
              ? hoverValue[1]
              : hoverValue[0];
          }
          if (lastValue && (!disabledDate || !disabledDate(lastValue))) {
            this.onSelect(lastValue);
          }
          event.preventDefault();
          return;
        }
        default:
          this.__emit('keydown', event);
      }
    },

    onDayHover(value) {
      let hoverValue = [];
      const { sSelectedValue, firstSelectedValue, type } = this;
      if (type === 'start' && sSelectedValue[1]) {
        hoverValue =
          this.compare(value, sSelectedValue[1]) < 0 ? [value, sSelectedValue[1]] : [value];
      } else if (type === 'end' && sSelectedValue[0]) {
        hoverValue = this.compare(value, sSelectedValue[0]) > 0 ? [sSelectedValue[0], value] : [];
      } else {
        if (!firstSelectedValue) {
          if (this.sHoverValue.length) {
            this.setState({ sHoverValue: [] });
          }
          return hoverValue;
        }
        hoverValue =
          this.compare(value, firstSelectedValue) < 0
            ? [value, firstSelectedValue]
            : [firstSelectedValue, value];
      }
      this.fireHoverValueChange(hoverValue);
      return hoverValue;
    },

    onToday() {
      const startValue = getTodayTime(this.sValue[0]);
      const endValue = startValue.clone().add(1, 'months');
      this.setState({ sValue: [startValue, endValue] });
    },

    onOpenTimePicker() {
      this.setState({
        sShowTimePicker: true,
      });
    },
    onCloseTimePicker() {
      this.setState({
        sShowTimePicker: false,
      });
    },

    onOk() {
      const { sSelectedValue } = this;
      if (this.isAllowedDateAndTime(sSelectedValue)) {
        this.__emit('ok', sSelectedValue);
      }
    },

    onStartInputChange(...oargs) {
      const args = ['left'].concat(oargs);
      return onInputSelect.apply(this, args);
    },

    onEndInputChange(...oargs) {
      const args = ['right'].concat(oargs);
      return onInputSelect.apply(this, args);
    },

    onStartInputSelect(value) {
      const args = ['left', value, { source: 'dateInputSelect' }];
      return onInputSelect.apply(this, args);
    },

    onEndInputSelect(value) {
      const args = ['right', value, { source: 'dateInputSelect' }];
      return onInputSelect.apply(this, args);
    },

    onStartValueChange(leftValue) {
      const value = [...this.sValue];
      value[0] = leftValue;
      return this.fireValueChange(value);
    },

    onEndValueChange(rightValue) {
      const value = [...this.sValue];
      value[1] = rightValue;
      return this.fireValueChange(value);
    },

    onStartPanelChange(value, mode) {
      const { sMode, sValue } = this;
      const newMode = [mode, sMode[1]];
      const newValue = [value || sValue[0], sValue[1]];
      this.__emit('panelChange', newValue, newMode);
      const newState = {
        sPanelTriggerSource: 'start',
      };
      if (!hasProp(this, 'mode')) {
        newState.sMode = newMode;
      }
      this.setState(newState);
    },

    onEndPanelChange(value, mode) {
      const { sMode, sValue } = this;
      const newMode = [sMode[0], mode];
      const newValue = [sValue[0], value || sValue[1]];
      this.__emit('panelChange', newValue, newMode);
      const newState = {
        sPanelTriggerSource: 'end',
      };
      if (!hasProp(this, 'mode')) {
        newState.sMode = newMode;
      }
      this.setState(newState);
    },

    getStartValue() {
      const {
        sSelectedValue: selectedValue,
        sShowTimePicker: showTimePicker,
        sValue: value,
        sMode: mode,
        sPanelTriggerSource: panelTriggerSource,
      } = this.$data;
      let startValue = value[0];
      // keep selectedTime when select date
      if (selectedValue[0] && this.$props.timePicker) {
        startValue = startValue.clone();
        syncTime(selectedValue[0], startValue);
      }
      if (showTimePicker && selectedValue[0]) {
        startValue = selectedValue[0];
      }

      // Adjust month if date not align
      if (
        panelTriggerSource === 'end' &&
        mode[0] === 'date' &&
        mode[1] === 'date' &&
        startValue.isSame(value[1], 'month')
      ) {
        startValue = startValue.clone().subtract(1, 'month');
      }

      return startValue;
    },

    getEndValue() {
      const {
        sSelectedValue: selectedValue,
        sShowTimePicker: showTimePicker,
        sValue: value,
        sMode: mode,
        sPanelTriggerSource: panelTriggerSource,
      } = this.$data;
      let endValue = value[1] ? value[1].clone() : value[0].clone().add(1, 'month');
      // keep selectedTime when select date
      if (selectedValue[1] && this.$props.timePicker) {
        syncTime(selectedValue[1], endValue);
      }
      if (showTimePicker) {
        endValue = selectedValue[1] ? selectedValue[1] : this.getStartValue();
      }

      // Adjust month if date not align
      if (
        !showTimePicker &&
        panelTriggerSource !== 'end' &&
        mode[0] === 'date' &&
        mode[1] === 'date' &&
        endValue.isSame(value[0], 'month')
      ) {
        endValue = endValue.clone().add(1, 'month');
      }

      return endValue;
    },
    // get disabled hours for second picker
    getEndDisableTime() {
      const { sSelectedValue, sValue, disabledTime } = this;
      const userSettingDisabledTime = disabledTime(sSelectedValue, 'end') || {};
      const startValue = (sSelectedValue && sSelectedValue[0]) || sValue[0].clone();
      // if startTime and endTime is same day..
      // the second time picker will not able to pick time before first time picker
      if (!sSelectedValue[1] || startValue.isSame(sSelectedValue[1], 'day')) {
        const hours = startValue.hour();
        const minutes = startValue.minute();
        const second = startValue.second();
        let { disabledHours, disabledMinutes, disabledSeconds } = userSettingDisabledTime;
        const oldDisabledMinutes = disabledMinutes ? disabledMinutes() : [];
        const olddisabledSeconds = disabledSeconds ? disabledSeconds() : [];
        disabledHours = generateOptions(hours, disabledHours);
        disabledMinutes = generateOptions(minutes, disabledMinutes);
        disabledSeconds = generateOptions(second, disabledSeconds);
        return {
          disabledHours() {
            return disabledHours;
          },
          disabledMinutes(hour) {
            if (hour === hours) {
              return disabledMinutes;
            }
            return oldDisabledMinutes;
          },
          disabledSeconds(hour, minute) {
            if (hour === hours && minute === minutes) {
              return disabledSeconds;
            }
            return olddisabledSeconds;
          },
        };
      }
      return userSettingDisabledTime;
    },

    isAllowedDateAndTime(selectedValue) {
      return (
        isAllowedDate(selectedValue[0], this.disabledDate, this.disabledStartTime) &&
        isAllowedDate(selectedValue[1], this.disabledDate, this.disabledEndTime)
      );
    },

    isMonthYearPanelShow(mode) {
      return ['month', 'year', 'decade'].indexOf(mode) > -1;
    },

    hasSelectedValue() {
      const { sSelectedValue } = this;
      return !!sSelectedValue[1] && !!sSelectedValue[0];
    },

    compare(v1, v2) {
      if (this.timePicker) {
        return v1.diff(v2);
      }
      return v1.diff(v2, 'days');
    },

    fireSelectValueChange(selectedValue, direct, cause) {
      const { timePicker, prevSelectedValue } = this;
      if (timePicker) {
        const timePickerProps = getOptionProps(timePicker);
        if (timePickerProps.defaultValue) {
          const timePickerDefaultValue = timePickerProps.defaultValue;
          if (!prevSelectedValue[0] && selectedValue[0]) {
            syncTime(timePickerDefaultValue[0], selectedValue[0]);
          }
          if (!prevSelectedValue[1] && selectedValue[1]) {
            syncTime(timePickerDefaultValue[1], selectedValue[1]);
          }
        }
      }
      // 尚未选择过时间，直接输入的话
      if (!this.sSelectedValue[0] || !this.sSelectedValue[1]) {
        const startValue = selectedValue[0] || moment();
        const endValue = selectedValue[1] || startValue.clone().add(1, 'months');
        this.setState({
          sSelectedValue: selectedValue,
          sValue:
            selectedValue && selectedValue.length === 2
              ? getValueFromSelectedValue([startValue, endValue])
              : this.sValue,
        });
      }

      if (selectedValue[0] && !selectedValue[1]) {
        this.setState({ firstSelectedValue: selectedValue[0] });
        this.fireHoverValueChange(selectedValue.concat());
      }
      this.__emit('change', selectedValue);
      if (direct || (selectedValue[0] && selectedValue[1])) {
        this.setState({
          prevSelectedValue: selectedValue,
          firstSelectedValue: null,
        });
        this.fireHoverValueChange([]);
        this.__emit('select', selectedValue, cause);
      }
      if (!hasProp(this, 'selectedValue')) {
        this.setState({
          sSelectedValue: selectedValue,
        });
      }
    },

    fireValueChange(value) {
      if (!hasProp(this, 'value')) {
        this.setState({
          sValue: value,
        });
      }
      this.__emit('valueChange', value);
    },

    fireHoverValueChange(hoverValue) {
      if (!hasProp(this, 'hoverValue')) {
        this.setState({ sHoverValue: hoverValue });
      }
      this.__emit('hoverChange', hoverValue);
    },

    clear() {
      this.fireSelectValueChange([], true);
      this.__emit('clear');
    },

    disabledStartTime(time) {
      return this.disabledTime(time, 'start');
    },

    disabledEndTime(time) {
      return this.disabledTime(time, 'end');
    },

    disabledStartMonth(month) {
      const { sValue } = this;
      return month.isAfter(sValue[1], 'month');
    },

    disabledEndMonth(month) {
      const { sValue } = this;
      return month.isBefore(sValue[0], 'month');
    },
  },

  render() {
    const props = getOptionProps(this);
    const {
      prefixCls,
      dateInputPlaceholder,
      timePicker,
      showOk,
      locale,
      showClear,
      showToday,
      type,
      seperator,
    } = props;
    const clearIcon = getComponentFromProp(this, 'clearIcon');
    const { sHoverValue, sSelectedValue, sMode: mode, sShowTimePicker, sValue } = this;
    const className = {
      [prefixCls]: 1,
      [`${prefixCls}-hidden`]: !props.visible,
      [`${prefixCls}-range`]: 1,
      [`${prefixCls}-show-time-picker`]: sShowTimePicker,
      [`${prefixCls}-week-number`]: props.showWeekNumber,
    };
    const baseProps = {
      props,
      on: getListeners(this),
    };
    const newProps = {
      props: {
        selectedValue: sSelectedValue,
      },
      on: {
        select: this.onSelect,
        dayHover:
          (type === 'start' && sSelectedValue[1]) ||
          (type === 'end' && sSelectedValue[0]) ||
          !!sHoverValue.length
            ? this.onDayHover
            : noop,
      },
    };

    let placeholder1;
    let placeholder2;

    if (dateInputPlaceholder) {
      if (Array.isArray(dateInputPlaceholder)) {
        [placeholder1, placeholder2] = dateInputPlaceholder;
      } else {
        placeholder1 = placeholder2 = dateInputPlaceholder;
      }
    }
    const showOkButton = showOk === true || (showOk !== false && !!timePicker);
    const cls = {
      [`${prefixCls}-footer`]: true,
      [`${prefixCls}-range-bottom`]: true,
      [`${prefixCls}-footer-show-ok`]: showOkButton,
    };

    const startValue = this.getStartValue();
    const endValue = this.getEndValue();
    const todayTime = getTodayTime(startValue);
    const thisMonth = todayTime.month();
    const thisYear = todayTime.year();
    const isTodayInView =
      (startValue.year() === thisYear && startValue.month() === thisMonth) ||
      (endValue.year() === thisYear && endValue.month() === thisMonth);
    const nextMonthOfStart = startValue.clone().add(1, 'months');
    const isClosestMonths =
      nextMonthOfStart.year() === endValue.year() && nextMonthOfStart.month() === endValue.month();
    const leftPartProps = mergeProps(baseProps, newProps, {
      props: {
        hoverValue: sHoverValue,
        direction: 'left',
        disabledTime: this.disabledStartTime,
        disabledMonth: this.disabledStartMonth,
        format: this.getFormat(),
        value: startValue,
        mode: mode[0],
        placeholder: placeholder1,
        showDateInput: this.showDateInput,
        timePicker,
        showTimePicker: sShowTimePicker || mode[0] === 'time',
        enablePrev: true,
        enableNext: !isClosestMonths || this.isMonthYearPanelShow(mode[1]),
        clearIcon,
      },
      on: {
        inputChange: this.onStartInputChange,
        inputSelect: this.onStartInputSelect,
        valueChange: this.onStartValueChange,
        panelChange: this.onStartPanelChange,
      },
    });
    const rightPartProps = mergeProps(baseProps, newProps, {
      props: {
        hoverValue: sHoverValue,
        direction: 'right',
        format: this.getFormat(),
        timePickerDisabledTime: this.getEndDisableTime(),
        placeholder: placeholder2,
        value: endValue,
        mode: mode[1],
        showDateInput: this.showDateInput,
        timePicker,
        showTimePicker: sShowTimePicker || mode[1] === 'time',
        disabledTime: this.disabledEndTime,
        disabledMonth: this.disabledEndMonth,
        enablePrev: !isClosestMonths || this.isMonthYearPanelShow(mode[0]),
        enableNext: true,
        clearIcon,
      },
      on: {
        inputChange: this.onEndInputChange,
        inputSelect: this.onEndInputSelect,
        valueChange: this.onEndValueChange,
        panelChange: this.onEndPanelChange,
      },
    });
    let TodayButtonNode = null;
    if (showToday) {
      const todayButtonProps = mergeProps(baseProps, {
        props: {
          disabled: isTodayInView,
          value: sValue[0],
          text: locale.backToToday,
        },
        on: {
          today: this.onToday,
        },
      });
      TodayButtonNode = <TodayButton key="todayButton" {...todayButtonProps} />;
    }

    let TimePickerButtonNode = null;
    if (props.timePicker) {
      const timePickerButtonProps = mergeProps(baseProps, {
        props: {
          showTimePicker: sShowTimePicker || (mode[0] === 'time' && mode[1] === 'time'),
          timePickerDisabled: !this.hasSelectedValue() || sHoverValue.length,
        },
        on: {
          openTimePicker: this.onOpenTimePicker,
          closeTimePicker: this.onCloseTimePicker,
        },
      });
      TimePickerButtonNode = <TimePickerButton key="timePickerButton" {...timePickerButtonProps} />;
    }

    let OkButtonNode = null;
    if (showOkButton) {
      const okButtonProps = mergeProps(baseProps, {
        props: {
          okDisabled:
            !this.isAllowedDateAndTime(sSelectedValue) ||
            !this.hasSelectedValue() ||
            sHoverValue.length,
        },
        on: {
          ok: this.onOk,
        },
      });
      OkButtonNode = <OkButton key="okButtonNode" {...okButtonProps} />;
    }
    const extraFooter = this.renderFooter(mode);
    return (
      <div ref="rootInstance" class={className} tabIndex="0" onKeydown={this.onKeyDown}>
        {props.renderSidebar()}
        <div class={`${prefixCls}-panel`}>
          {showClear && sSelectedValue[0] && sSelectedValue[1] ? (
            <a role="button" title={locale.clear} onClick={this.clear}>
              {clearIcon || <span class={`${prefixCls}-clear-btn`} />}
            </a>
          ) : null}
          <div
            class={`${prefixCls}-date-panel`}
            onMouseleave={type !== 'both' ? this.onDatePanelLeave : noop}
            onMouseenter={type !== 'both' ? this.onDatePanelEnter : noop}
          >
            <CalendarPart {...leftPartProps} />
            <span class={`${prefixCls}-range-middle`}>{seperator}</span>
            <CalendarPart {...rightPartProps} />
          </div>
          <div class={cls}>
            {showToday || props.timePicker || showOkButton || extraFooter ? (
              <div class={`${prefixCls}-footer-btn`}>
                {extraFooter}
                {TodayButtonNode}
                {TimePickerButtonNode}
                {OkButtonNode}
              </div>
            ) : null}
          </div>
        </div>
      </div>
    );
  },
};

export default RangeCalendar;