import type { DisabledTimes, PanelMode, PickerMode, RangeValue, EventValue } from './interface';
import type { PickerBaseProps, PickerDateProps, PickerTimeProps } from './Picker';
import type { SharedTimeProps } from './panels/TimePanel';
import PickerTrigger from './PickerTrigger';
import PickerPanel from './PickerPanel';
import usePickerInput from './hooks/usePickerInput';
import getDataOrAriaProps, { toArray, getValue, updateValues } from './utils/miscUtil';
import { getDefaultFormat, getInputSize, elementsContains } from './utils/uiUtil';
import type { ContextOperationRefProps } from './PanelContext';
import { useProvidePanel } from './PanelContext';
import {
  isEqual,
  getClosingViewDate,
  isSameDate,
  isSameWeek,
  isSameQuarter,
  formatValue,
  parseValue,
} from './utils/dateUtil';
import useValueTexts from './hooks/useValueTexts';
import useTextValueMapping from './hooks/useTextValueMapping';
import type { GenerateConfig } from './generate';
import type { PickerPanelProps } from '.';
import { RangeContextProvider } from './RangeContext';
import useRangeDisabled from './hooks/useRangeDisabled';
import getExtraFooter from './utils/getExtraFooter';
import getRanges from './utils/getRanges';
import useRangeViewDates from './hooks/useRangeViewDates';
import type { DateRender } from './panels/DatePanel/DateBody';
import useHoverValue from './hooks/useHoverValue';
import type { VueNode } from '../_util/type';
import type { ChangeEvent, FocusEventHandler, MouseEventHandler } from '../_util/EventInterface';
import { computed, defineComponent, ref, toRef, watch, watchEffect } from 'vue';
import useMergedState from '../_util/hooks/useMergedState';
import { warning } from '../vc-util/warning';
import useState from '../_util/hooks/useState';
import classNames from '../_util/classNames';

function reorderValues<DateType>(
  values: RangeValue<DateType>,
  generateConfig: GenerateConfig<DateType>,
): RangeValue<DateType> {
  if (values && values[0] && values[1] && generateConfig.isAfter(values[0], values[1])) {
    return [values[1], values[0]];
  }

  return values;
}

function canValueTrigger<DateType>(
  value: EventValue<DateType>,
  index: number,
  disabled: [boolean, boolean],
  allowEmpty?: [boolean, boolean] | null,
): boolean {
  if (value) {
    return true;
  }

  if (allowEmpty && allowEmpty[index]) {
    return true;
  }

  if (disabled[(index + 1) % 2]) {
    return true;
  }

  return false;
}

export type RangeType = 'start' | 'end';

export type RangeInfo = {
  range: RangeType;
};

export type RangeDateRender<DateType> = (props: {
  current: DateType;
  today: DateType;
  info: RangeInfo;
}) => VueNode;

export type RangePickerSharedProps<DateType> = {
  id?: string;
  value?: RangeValue<DateType>;
  defaultValue?: RangeValue<DateType>;
  defaultPickerValue?: [DateType, DateType];
  placeholder?: [string, string];
  disabled?: boolean | [boolean, boolean];
  disabledTime?: (date: EventValue<DateType>, type: RangeType) => DisabledTimes;
  ranges?: Record<
    string,
    Exclude<RangeValue<DateType>, null> | (() => Exclude<RangeValue<DateType>, null>)
  >;
  separator?: VueNode;
  allowEmpty?: [boolean, boolean];
  mode?: [PanelMode, PanelMode];
  onChange?: (values: RangeValue<DateType>, formatString: [string, string]) => void;
  onCalendarChange?: (
    values: RangeValue<DateType>,
    formatString: [string, string],
    info: RangeInfo,
  ) => void;
  onPanelChange?: (values: RangeValue<DateType>, modes: [PanelMode, PanelMode]) => void;
  onFocus?: FocusEventHandler;
  onBlur?: FocusEventHandler;
  onMouseenter?: MouseEventHandler;
  onMouseleave?: MouseEventHandler;
  onOk?: (dates: RangeValue<DateType>) => void;
  direction?: 'ltr' | 'rtl';
  autocomplete?: string;
  /** @private Internal control of active picker. Do not use since it's private usage */
  activePickerIndex?: 0 | 1;
  dateRender?: RangeDateRender<DateType>;
  panelRender?: (originPanel: VueNode) => VueNode;
};

type OmitPickerProps<Props> = Omit<
  Props,
  | 'value'
  | 'defaultValue'
  | 'defaultPickerValue'
  | 'placeholder'
  | 'disabled'
  | 'disabledTime'
  | 'showToday'
  | 'showTime'
  | 'mode'
  | 'onChange'
  | 'onSelect'
  | 'onPanelChange'
  | 'pickerValue'
  | 'onPickerValueChange'
  | 'onOk'
  | 'dateRender'
>;

type RangeShowTimeObject<DateType> = Omit<SharedTimeProps<DateType>, 'defaultValue'> & {
  defaultValue?: DateType[];
};

export type RangePickerBaseProps<DateType> = {} & RangePickerSharedProps<DateType> &
  OmitPickerProps<PickerBaseProps<DateType>>;

export type RangePickerDateProps<DateType> = {
  showTime?: boolean | RangeShowTimeObject<DateType>;
} & RangePickerSharedProps<DateType> &
  OmitPickerProps<PickerDateProps<DateType>>;

export type RangePickerTimeProps<DateType> = {
  order?: boolean;
} & RangePickerSharedProps<DateType> &
  OmitPickerProps<PickerTimeProps<DateType>>;

export type RangePickerProps<DateType> =
  | RangePickerBaseProps<DateType>
  | RangePickerDateProps<DateType>
  | RangePickerTimeProps<DateType>;

// TMP type to fit for ts 3.9.2
type OmitType<DateType> = Omit<RangePickerBaseProps<DateType>, 'picker'> &
  Omit<RangePickerDateProps<DateType>, 'picker'> &
  Omit<RangePickerTimeProps<DateType>, 'picker'>;

type MergedRangePickerProps<DateType> = {
  picker?: PickerMode;
} & OmitType<DateType>;
function RangerPicker<DateType>() {
  return defineComponent<MergedRangePickerProps<DateType>>({
    name: 'RangerPicker',
    inheritAttrs: false,
    props: [
      'prefixCls',
      'id',
      'popupStyle',
      'dropdownClassName',
      'transitionName',
      'dropdownAlign',
      'getPopupContainer',
      'generateConfig',
      'locale',
      'placeholder',
      'autofocus',
      'disabled',
      'format',
      'picker',
      'showTime',
      'use12Hours',
      'separator',
      'value',
      'defaultValue',
      'defaultPickerValue',
      'open',
      'defaultOpen',
      'disabledDate',
      'disabledTime',
      'dateRender',
      'panelRender',
      'ranges',
      'allowEmpty',
      'allowClear',
      'suffixIcon',
      'clearIcon',
      'pickerRef',
      'inputReadOnly',
      'mode',
      'renderExtraFooter',
      'onChange',
      'onOpenChange',
      'onPanelChange',
      'onCalendarChange',
      'onFocus',
      'onBlur',
      'onMouseenter',
      'onMouseleave',
      'onOk',
      'onKeydown',
      'components',
      'order',
      'direction',
      'activePickerIndex',
      'autocomplete',
    ] as any,
    setup(props, { attrs, expose }) {
      const needConfirmButton = computed(
        () => (props.picker === 'date' && !!props.showTime) || props.picker === 'time',
      );

      // We record opened status here in case repeat open with picker
      const openRecordsRef = ref<Record<number, boolean>>({});

      const containerRef = ref<HTMLDivElement>(null);
      const panelDivRef = ref<HTMLDivElement>(null);
      const startInputDivRef = ref<HTMLDivElement>(null);
      const endInputDivRef = ref<HTMLDivElement>(null);
      const separatorRef = ref<HTMLDivElement>(null);
      const startInputRef = ref<HTMLInputElement>(null);
      const endInputRef = ref<HTMLInputElement>(null);

      // ============================= Misc ==============================
      const formatList = computed(() =>
        toArray(
          getDefaultFormat<DateType>(props.format, props.picker, props.showTime, props.use12Hours),
        ),
      );

      // Active picker
      const [mergedActivePickerIndex, setMergedActivePickerIndex] = useMergedState<0 | 1>(0, {
        value: toRef(props, 'activePickerIndex'),
      });

      // Operation ref
      const operationRef = ref<ContextOperationRefProps>(null);

      const mergedDisabled = computed<[boolean, boolean]>(() => {
        const { disabled } = props;
        if (Array.isArray(disabled)) {
          return disabled;
        }

        return [disabled || false, disabled || false];
      });

      // ============================= Value =============================
      const [mergedValue, setInnerValue] = useMergedState<RangeValue<DateType>>(null, {
        value: toRef(props, 'value'),
        defaultValue: props.defaultValue,
        postState: values =>
          props.picker === 'time' && !props.order
            ? values
            : reorderValues(values, props.generateConfig),
      });

      // =========================== View Date ===========================
      // Config view panel
      const [startViewDate, endViewDate, setViewDate] = useRangeViewDates({
        values: mergedValue,
        picker: toRef(props, 'picker'),
        defaultDates: props.defaultPickerValue,
        generateConfig: toRef(props, 'generateConfig'),
      });

      // ========================= Select Values =========================
      const [selectedValue, setSelectedValue] = useMergedState(mergedValue.value, {
        postState: values => {
          let postValues = values;

          if (mergedDisabled.value[0] && mergedDisabled.value[1]) {
            return postValues;
          }

          // Fill disabled unit
          for (let i = 0; i < 2; i += 1) {
            if (mergedDisabled[i] && !getValue(postValues, i) && !getValue(props.allowEmpty, i)) {
              postValues = updateValues(postValues, props.generateConfig.getNow(), i);
            }
          }
          return postValues;
        },
      });

      // ============================= Modes =============================
      const [mergedModes, setInnerModes] = useMergedState<[PanelMode, PanelMode]>(
        [props.picker, props.picker],
        {
          value: toRef(props, 'mode'),
        },
      );

      watch(
        () => props.picker,
        () => {
          setInnerModes([props.picker, props.picker]);
        },
      );

      const triggerModesChange = (modes: [PanelMode, PanelMode], values: RangeValue<DateType>) => {
        setInnerModes(modes);
        props.onPanelChange?.(values, modes);
      };

      // ========================= Disable Date ==========================
      const [disabledStartDate, disabledEndDate] = useRangeDisabled(
        {
          picker: toRef(props, 'picker'),
          selectedValue,
          locale: toRef(props, 'locale'),
          disabled: mergedDisabled,
          disabledDate: toRef(props, 'disabledDate'),
          generateConfig: toRef(props, 'generateConfig'),
        },
        openRecordsRef,
      );

      // ============================= Open ==============================
      const [mergedOpen, triggerInnerOpen] = useMergedState(false, {
        value: toRef(props, 'open'),
        defaultValue: props.defaultOpen,
        postState: postOpen =>
          mergedDisabled.value[mergedActivePickerIndex.value] ? false : postOpen,
        onChange: newOpen => {
          props.onOpenChange?.(newOpen);

          if (!newOpen && operationRef.value && operationRef.value.onClose) {
            operationRef.value.onClose();
          }
        },
      });

      const startOpen = computed(() => mergedOpen.value && mergedActivePickerIndex.value === 0);
      const endOpen = computed(() => mergedOpen.value && mergedActivePickerIndex.value === 1);

      // ============================= Popup =============================
      // Popup min width
      const popupMinWidth = ref(0);
      watch(mergedOpen, () => {
        if (!mergedOpen.value && containerRef.value) {
          popupMinWidth.value = containerRef.value.offsetWidth;
        }
      });

      // ============================ Trigger ============================
      const triggerRef = ref<any>();

      function triggerOpen(newOpen: boolean, index: 0 | 1) {
        if (newOpen) {
          clearTimeout(triggerRef.value);
          openRecordsRef.value[index] = true;

          setMergedActivePickerIndex(index);
          triggerInnerOpen(newOpen);

          // Open to reset view date
          if (!mergedOpen.value) {
            setViewDate(null, index);
          }
        } else if (mergedActivePickerIndex.value === index) {
          triggerInnerOpen(newOpen);

          // Clean up async
          // This makes ref not quick refresh in case user open another input with blur trigger
          const openRecords = openRecordsRef.value;
          triggerRef.value = setTimeout(() => {
            if (openRecords === openRecordsRef.value) {
              openRecordsRef.value = {};
            }
          });
        }
      }

      function triggerOpenAndFocus(index: 0 | 1) {
        triggerOpen(true, index);
        // Use setTimeout to make sure panel DOM exists
        window.setTimeout(() => {
          const inputRef = [startInputRef, endInputRef][index];
          if (inputRef.value) {
            inputRef.value.focus();
          }
        }, 0);
      }

      function triggerChange(newValue: RangeValue<DateType>, sourceIndex: 0 | 1) {
        let values = newValue;
        let startValue = getValue(values, 0);
        let endValue = getValue(values, 1);
        const { generateConfig, locale, picker, order, onCalendarChange, allowEmpty, onChange } =
          props;

        // >>>>> Format start & end values
        if (startValue && endValue && generateConfig.isAfter(startValue, endValue)) {
          if (
            // WeekPicker only compare week
            (picker === 'week' &&
              !isSameWeek(generateConfig, locale.locale, startValue, endValue)) ||
            // QuotaPicker only compare week
            (picker === 'quarter' && !isSameQuarter(generateConfig, startValue, endValue)) ||
            // Other non-TimePicker compare date
            (picker !== 'week' &&
              picker !== 'quarter' &&
              picker !== 'time' &&
              !isSameDate(generateConfig, startValue, endValue))
          ) {
            // Clean up end date when start date is after end date
            if (sourceIndex === 0) {
              values = [startValue, null];
              endValue = null;
            } else {
              startValue = null;
              values = [null, endValue];
            }

            // Clean up cache since invalidate
            openRecordsRef.value = {
              [sourceIndex]: true,
            };
          } else if (picker !== 'time' || order !== false) {
            // Reorder when in same date
            values = reorderValues(values, generateConfig);
          }
        }

        setSelectedValue(values);

        const startStr =
          values && values[0]
            ? formatValue(values[0], { generateConfig, locale, format: formatList.value[0] })
            : '';
        const endStr =
          values && values[1]
            ? formatValue(values[1], { generateConfig, locale, format: formatList.value[0] })
            : '';
        if (onCalendarChange) {
          const info: RangeInfo = { range: sourceIndex === 0 ? 'start' : 'end' };

          onCalendarChange(values, [startStr, endStr], info);
        }

        // >>>>> Trigger `onChange` event
        const canStartValueTrigger = canValueTrigger(
          startValue,
          0,
          mergedDisabled.value,
          allowEmpty,
        );
        const canEndValueTrigger = canValueTrigger(endValue, 1, mergedDisabled.value, allowEmpty);

        const canTrigger = values === null || (canStartValueTrigger && canEndValueTrigger);

        if (canTrigger) {
          // Trigger onChange only when value is validate
          setInnerValue(values);

          if (
            onChange &&
            (!isEqual(generateConfig, getValue(mergedValue.value, 0), startValue) ||
              !isEqual(generateConfig, getValue(mergedValue.value, 1), endValue))
          ) {
            onChange(values, [startStr, endStr]);
          }
        }

        // >>>>> Open picker when

        // Always open another picker if possible
        let nextOpenIndex: 0 | 1 = null;
        if (sourceIndex === 0 && !mergedDisabled.value[1]) {
          nextOpenIndex = 1;
        } else if (sourceIndex === 1 && !mergedDisabled.value[0]) {
          nextOpenIndex = 0;
        }

        if (
          nextOpenIndex !== null &&
          nextOpenIndex !== mergedActivePickerIndex.value &&
          (!openRecordsRef.value[nextOpenIndex] || !getValue(values, nextOpenIndex)) &&
          getValue(values, sourceIndex)
        ) {
          // Delay to focus to avoid input blur trigger expired selectedValues
          triggerOpenAndFocus(nextOpenIndex);
        } else {
          triggerOpen(false, sourceIndex);
        }
      }

      const forwardKeydown = (e: KeyboardEvent) => {
        if (mergedOpen && operationRef.value && operationRef.value.onKeydown) {
          // Let popup panel handle keyboard
          return operationRef.value.onKeydown(e);
        }

        /* istanbul ignore next */
        /* eslint-disable no-lone-blocks */
        {
          warning(
            false,
            'Picker not correct forward Keydown operation. Please help to fire issue about this.',
          );
          return false;
        }
      };

      // ============================= Text ==============================
      const sharedTextHooksProps = {
        formatList,
        generateConfig: toRef(props, 'generateConfig'),
        locale: toRef(props, 'locale'),
      };

      const [startValueTexts, firstStartValueText] = useValueTexts<DateType>(
        computed(() => getValue(selectedValue.value, 0)),
        sharedTextHooksProps,
      );

      const [endValueTexts, firstEndValueText] = useValueTexts<DateType>(
        computed(() => getValue(selectedValue.value, 1)),
        sharedTextHooksProps,
      );

      const onTextChange = (newText: string, index: 0 | 1) => {
        const inputDate = parseValue(newText, {
          locale: props.locale,
          formatList: formatList.value,
          generateConfig: props.generateConfig,
        });

        const disabledFunc = index === 0 ? disabledStartDate : disabledEndDate;

        if (inputDate && !disabledFunc(inputDate)) {
          setSelectedValue(updateValues(selectedValue.value, inputDate, index));
          setViewDate(inputDate, index);
        }
      };

      const [startText, triggerStartTextChange, resetStartText] = useTextValueMapping({
        valueTexts: startValueTexts,
        onTextChange: newText => onTextChange(newText, 0),
      });

      const [endText, triggerEndTextChange, resetEndText] = useTextValueMapping({
        valueTexts: endValueTexts,
        onTextChange: newText => onTextChange(newText, 1),
      });

      const [rangeHoverValue, setRangeHoverValue] = useState<RangeValue<DateType>>(null);

      // ========================== Hover Range ==========================
      const [hoverRangedValue, setHoverRangedValue] = useState<RangeValue<DateType>>(null);

      const [startHoverValue, onStartEnter, onStartLeave] = useHoverValue(
        startText,
        sharedTextHooksProps,
      );

      const [endHoverValue, onEndEnter, onEndLeave] = useHoverValue(endText, sharedTextHooksProps);

      const onDateMouseenter = (date: DateType) => {
        setHoverRangedValue(updateValues(selectedValue.value, date, mergedActivePickerIndex.value));
        if (mergedActivePickerIndex.value === 0) {
          onStartEnter(date);
        } else {
          onEndEnter(date);
        }
      };

      const onDateMouseleave = () => {
        setHoverRangedValue(updateValues(selectedValue.value, null, mergedActivePickerIndex.value));
        if (mergedActivePickerIndex.value === 0) {
          onStartLeave();
        } else {
          onEndLeave();
        }
      };

      // ============================= Input =============================
      const getSharedInputHookProps = (index: 0 | 1, resetText: () => void) => ({
        forwardKeydown,
        onBlur: (e: FocusEvent) => {
          props.onBlur?.(e);
        },
        isClickOutside: (target: EventTarget | null) =>
          !elementsContains(
            [panelDivRef.value, startInputDivRef.value, endInputDivRef.value],
            target as HTMLElement,
          ),
        onFocus: (e: FocusEvent) => {
          setMergedActivePickerIndex(index);
          props.onFocus?.(e);
        },
        triggerOpen: (newOpen: boolean) => {
          triggerOpen(newOpen, index);
        },
        onSubmit: () => {
          triggerChange(selectedValue.value, index);
          resetText();
        },
        onCancel: () => {
          triggerOpen(false, index);
          setSelectedValue(mergedValue.value);
          resetText();
        },
      });

      const [startInputProps, { focused: startFocused, typing: startTyping }] = usePickerInput({
        ...getSharedInputHookProps(0, resetStartText),
        blurToCancel: needConfirmButton,
        open: startOpen,
        value: startText,
        onKeydown: (e, preventDefault) => {
          props.onKeydown?.(e, preventDefault);
        },
      });

      const [endInputProps, { focused: endFocused, typing: endTyping }] = usePickerInput({
        ...getSharedInputHookProps(1, resetEndText),
        blurToCancel: needConfirmButton,
        open: endOpen,
        value: endText,
        onKeydown: (e, preventDefault) => {
          props.onKeydown?.(e, preventDefault);
        },
      });

      // ========================== Click Picker ==========================
      const onPickerClick = (e: MouseEvent) => {
        // When click inside the picker & outside the picker's input elements
        // the panel should still be opened
        if (
          !mergedOpen.value &&
          !startInputRef.value.contains(e.target as Node) &&
          !endInputRef.value.contains(e.target as Node)
        ) {
          if (!mergedDisabled.value[0]) {
            triggerOpenAndFocus(0);
          } else if (!mergedDisabled.value[1]) {
            triggerOpenAndFocus(1);
          }
        }
      };

      const onPickerMousedown = (e: MouseEvent) => {
        // shouldn't affect input elements if picker is active
        if (
          mergedOpen.value &&
          (startFocused.value || endFocused.value) &&
          !startInputRef.value.contains(e.target as Node) &&
          !endInputRef.value.contains(e.target as Node)
        ) {
          e.preventDefault();
        }
      };

      // ============================= Sync ==============================
      // Close should sync back with text value
      const startStr = computed(() =>
        mergedValue.value?.[0]
          ? formatValue(mergedValue.value[0], {
              locale: props.locale,
              format: 'YYYYMMDDHHmmss',
              generateConfig: props.generateConfig,
            })
          : '',
      );
      const endStr = computed(() =>
        mergedValue.value?.[1]
          ? formatValue(mergedValue.value[1], {
              locale: props.locale,
              format: 'YYYYMMDDHHmmss',
              generateConfig: props.generateConfig,
            })
          : '',
      );

      watch([mergedOpen, startValueTexts, endValueTexts], () => {
        if (!mergedOpen.value) {
          setSelectedValue(mergedValue.value);

          if (!startValueTexts.value.length || startValueTexts.value[0] === '') {
            triggerStartTextChange('');
          } else if (firstStartValueText.value !== startText.value) {
            resetStartText();
          }
          if (!endValueTexts.value.length || endValueTexts.value[0] === '') {
            triggerEndTextChange('');
          } else if (firstEndValueText.value !== endText.value) {
            resetEndText();
          }
        }
      });

      // Sync innerValue with control mode
      watch([startStr, endStr], () => {
        setSelectedValue(mergedValue.value);
      });

      // ============================ Warning ============================
      if (process.env.NODE_ENV !== 'production') {
        watchEffect(() => {
          const { value, disabled } = props;
          if (
            value &&
            Array.isArray(disabled) &&
            ((getValue(disabled, 0) && !getValue(value, 0)) ||
              (getValue(disabled, 1) && !getValue(value, 1)))
          ) {
            warning(
              false,
              '`disabled` should not set with empty `value`. You should set `allowEmpty` or `value` instead.',
            );
          }
        });
      }

      expose({
        focus: () => {
          if (startInputRef.value) {
            startInputRef.value.focus();
          }
        },
        blur: () => {
          if (startInputRef.value) {
            startInputRef.value.blur();
          }
          if (endInputRef.value) {
            endInputRef.value.blur();
          }
        },
      });

      // ============================ Ranges =============================

      const rangeList = computed(() =>
        Object.keys(props.ranges || {}).map(label => {
          const range = props.ranges![label];
          const newValues = typeof range === 'function' ? range() : range;

          return {
            label,
            onClick: () => {
              triggerChange(newValues, null);
              triggerOpen(false, mergedActivePickerIndex.value);
            },
            onMouseenter: () => {
              setRangeHoverValue(newValues);
            },
            onMouseleave: () => {
              setRangeHoverValue(null);
            },
          };
        }),
      );
      // ============================= Panel =============================
      const panelHoverRangedValue = computed(() => {
        if (
          mergedOpen.value &&
          hoverRangedValue.value &&
          hoverRangedValue.value[0] &&
          hoverRangedValue.value[1] &&
          props.generateConfig.isAfter(hoverRangedValue.value[1], hoverRangedValue.value[0])
        ) {
          return hoverRangedValue.value;
        } else {
          return null;
        }
      });
      function renderPanel(
        panelPosition: 'left' | 'right' | false = false,
        panelProps: Partial<PickerPanelProps<DateType>> = {},
      ) {
        const { generateConfig, showTime, dateRender, direction, disabledTime, prefixCls, locale } =
          props;

        let panelShowTime: boolean | SharedTimeProps<DateType> | undefined =
          showTime as SharedTimeProps<DateType>;
        if (showTime && typeof showTime === 'object' && showTime.defaultValue) {
          const timeDefaultValues: DateType[] = showTime.defaultValue!;
          panelShowTime = {
            ...showTime,
            defaultValue: getValue(timeDefaultValues, mergedActivePickerIndex.value) || undefined,
          };
        }

        let panelDateRender: DateRender<DateType> | null = null;
        if (dateRender) {
          panelDateRender = ({ current: date, today }) =>
            dateRender({
              current: date,
              today,
              info: {
                range: mergedActivePickerIndex.value ? 'end' : 'start',
              },
            });
        }

        return (
          <RangeContextProvider
            value={{
              inRange: true,
              panelPosition,
              rangedValue: rangeHoverValue.value || selectedValue.value,
              hoverRangedValue: panelHoverRangedValue.value,
            }}
          >
            <PickerPanel<DateType>
              {...(props as any)}
              {...panelProps}
              dateRender={panelDateRender}
              showTime={panelShowTime}
              mode={mergedModes.value[mergedActivePickerIndex.value]}
              generateConfig={generateConfig}
              style={undefined}
              direction={direction}
              disabledDate={
                mergedActivePickerIndex.value === 0 ? disabledStartDate : disabledEndDate
              }
              disabledTime={date => {
                if (disabledTime) {
                  return disabledTime(date, mergedActivePickerIndex.value === 0 ? 'start' : 'end');
                }
                return false;
              }}
              class={classNames({
                [`${prefixCls}-panel-focused`]:
                  mergedActivePickerIndex.value === 0 ? !startTyping.value : !endTyping.value,
              })}
              value={getValue(selectedValue.value, mergedActivePickerIndex.value)}
              locale={locale}
              tabIndex={-1}
              onPanelChange={(date, newMode) => {
                // clear hover value when panel change
                if (mergedActivePickerIndex.value === 0) {
                  onStartLeave(true);
                }
                if (mergedActivePickerIndex.value === 1) {
                  onEndLeave(true);
                }
                triggerModesChange(
                  updateValues(mergedModes.value, newMode, mergedActivePickerIndex.value),
                  updateValues(selectedValue.value, date, mergedActivePickerIndex.value),
                );

                let viewDate = date;
                if (
                  panelPosition === 'right' &&
                  mergedModes.value[mergedActivePickerIndex.value] === newMode
                ) {
                  viewDate = getClosingViewDate(viewDate, newMode as any, generateConfig, -1);
                }
                setViewDate(viewDate, mergedActivePickerIndex.value);
              }}
              onOk={null}
              onSelect={undefined}
              onChange={undefined}
              defaultValue={
                mergedActivePickerIndex.value === 0
                  ? getValue(selectedValue.value, 1)
                  : getValue(selectedValue.value, 0)
              }
              defaultPickerValue={undefined}
            />
          </RangeContextProvider>
        );
      }

      const onContextSelect = (date: DateType, type: 'key' | 'mouse' | 'submit') => {
        const values = updateValues(selectedValue.value, date, mergedActivePickerIndex.value);

        if (type === 'submit' || (type !== 'key' && !needConfirmButton.value)) {
          // triggerChange will also update selected values
          triggerChange(values, mergedActivePickerIndex.value);
          // clear hover value style
          if (mergedActivePickerIndex.value === 0) {
            onStartLeave();
          } else {
            onEndLeave();
          }
        } else {
          setSelectedValue(values);
        }
      };

      useProvidePanel({
        operationRef,
        hideHeader: computed(() => props.picker === 'time'),
        onDateMouseenter,
        onDateMouseleave,
        hideRanges: computed(() => true),
        onSelect: onContextSelect,
        open: mergedOpen,
      });

      return () => {
        const {
          prefixCls = 'rc-picker',
          id,
          popupStyle,
          dropdownClassName,
          transitionName,
          dropdownAlign,
          getPopupContainer,
          generateConfig,
          locale,
          placeholder,
          autofocus,
          picker = 'date',
          showTime,
          separator = '~',
          disabledDate,
          panelRender,
          allowClear,
          suffixIcon,
          clearIcon,
          inputReadOnly,
          renderExtraFooter,
          onMouseenter,
          onMouseleave,
          onOk,
          components,
          direction,
          autocomplete = 'off',
        } = props;
        let arrowLeft = 0;
        let panelLeft = 0;
        if (
          mergedActivePickerIndex.value &&
          startInputDivRef.value &&
          separatorRef.value &&
          panelDivRef.value
        ) {
          // Arrow offset
          arrowLeft = startInputDivRef.value.offsetWidth + separatorRef.value.offsetWidth;

          if (panelDivRef.value.offsetWidth && arrowLeft > panelDivRef.value.offsetWidth) {
            panelLeft = arrowLeft;
          }
        }

        const arrowPositionStyle = direction === 'rtl' ? { right: arrowLeft } : { left: arrowLeft };

        function renderPanels() {
          let panels: VueNode;
          const extraNode = getExtraFooter(
            prefixCls,
            mergedModes.value[mergedActivePickerIndex.value],
            renderExtraFooter,
          );

          const rangesNode = getRanges({
            prefixCls,
            components,
            needConfirmButton: needConfirmButton.value,
            okDisabled:
              !getValue(selectedValue.value, mergedActivePickerIndex.value) ||
              (disabledDate && disabledDate(selectedValue.value[mergedActivePickerIndex.value])),
            locale,
            rangeList: rangeList.value,
            onOk: () => {
              if (getValue(selectedValue.value, mergedActivePickerIndex.value)) {
                // triggerChangeOld(selectedValue.value);
                triggerChange(selectedValue.value, mergedActivePickerIndex.value);
                if (onOk) {
                  onOk(selectedValue.value);
                }
              }
            },
          });

          if (picker !== 'time' && !showTime) {
            const viewDate =
              mergedActivePickerIndex.value === 0 ? startViewDate.value : endViewDate.value;
            const nextViewDate = getClosingViewDate(viewDate, picker, generateConfig);
            const currentMode = mergedModes.value[mergedActivePickerIndex.value];

            const showDoublePanel = currentMode === picker;
            const leftPanel = renderPanel(showDoublePanel ? 'left' : false, {
              pickerValue: viewDate,
              onPickerValueChange: newViewDate => {
                setViewDate(newViewDate, mergedActivePickerIndex.value);
              },
            });
            const rightPanel = renderPanel('right', {
              pickerValue: nextViewDate,
              onPickerValueChange: newViewDate => {
                setViewDate(
                  getClosingViewDate(newViewDate, picker, generateConfig, -1),
                  mergedActivePickerIndex.value,
                );
              },
            });

            if (direction === 'rtl') {
              panels = (
                <>
                  {rightPanel}
                  {showDoublePanel && leftPanel}
                </>
              );
            } else {
              panels = (
                <>
                  {leftPanel}
                  {showDoublePanel && rightPanel}
                </>
              );
            }
          } else {
            panels = renderPanel();
          }

          let mergedNodes: VueNode = (
            <>
              <div class={`${prefixCls}-panels`}>{panels}</div>
              {(extraNode || rangesNode) && (
                <div class={`${prefixCls}-footer`}>
                  {extraNode}
                  {rangesNode}
                </div>
              )}
            </>
          );

          if (panelRender) {
            mergedNodes = panelRender(mergedNodes);
          }

          return (
            <div
              class={`${prefixCls}-panel-container`}
              style={{ marginLeft: panelLeft }}
              ref={panelDivRef}
              onMousedown={e => {
                e.preventDefault();
              }}
            >
              {mergedNodes}
            </div>
          );
        }

        const rangePanel = (
          <div
            class={classNames(`${prefixCls}-range-wrapper`, `${prefixCls}-${picker}-range-wrapper`)}
            style={{ minWidth: `${popupMinWidth.value}px` }}
          >
            <div class={`${prefixCls}-range-arrow`} style={arrowPositionStyle} />
            {renderPanels()}
          </div>
        );

        // ============================= Icons =============================
        let suffixNode: VueNode;
        if (suffixIcon) {
          suffixNode = <span class={`${prefixCls}-suffix`}>{suffixIcon}</span>;
        }

        let clearNode: VueNode;
        if (
          allowClear &&
          ((getValue(mergedValue.value, 0) && !mergedDisabled.value[0]) ||
            (getValue(mergedValue.value, 1) && !mergedDisabled.value[1]))
        ) {
          clearNode = (
            <span
              onMousedown={e => {
                e.preventDefault();
                e.stopPropagation();
              }}
              onMouseup={e => {
                e.preventDefault();
                e.stopPropagation();
                let values = mergedValue.value;

                if (!mergedDisabled.value[0]) {
                  values = updateValues(values, null, 0);
                }
                if (!mergedDisabled.value[1]) {
                  values = updateValues(values, null, 1);
                }

                triggerChange(values, null);
                triggerOpen(false, mergedActivePickerIndex.value);
              }}
              class={`${prefixCls}-clear`}
            >
              {clearIcon || <span class={`${prefixCls}-clear-btn`} />}
            </span>
          );
        }

        const inputSharedProps = {
          size: getInputSize(picker, formatList.value[0], generateConfig),
        };

        let activeBarLeft = 0;
        let activeBarWidth = 0;
        if (startInputDivRef.value && endInputDivRef.value && separatorRef.value) {
          if (mergedActivePickerIndex.value === 0) {
            activeBarWidth = startInputDivRef.value.offsetWidth;
          } else {
            activeBarLeft = arrowLeft;
            activeBarWidth = endInputDivRef.value.offsetWidth;
          }
        }
        const activeBarPositionStyle =
          direction === 'rtl' ? { right: `${activeBarLeft}px` } : { left: `${activeBarLeft}px` };
        // ============================ Return =============================

        return (
          <PickerTrigger
            visible={mergedOpen.value}
            popupStyle={popupStyle}
            prefixCls={prefixCls}
            dropdownClassName={dropdownClassName}
            dropdownAlign={dropdownAlign}
            getPopupContainer={getPopupContainer}
            transitionName={transitionName}
            range
            direction={direction}
            v-slots={{
              popupElement: () => rangePanel,
            }}
          >
            <div
              ref={containerRef}
              class={classNames(prefixCls, `${prefixCls}-range`, attrs.class, {
                [`${prefixCls}-disabled`]: mergedDisabled.value[0] && mergedDisabled.value[1],
                [`${prefixCls}-focused`]:
                  mergedActivePickerIndex.value === 0 ? startFocused.value : endFocused.value,
                [`${prefixCls}-rtl`]: direction === 'rtl',
              })}
              style={attrs.style}
              onClick={onPickerClick}
              onMouseenter={onMouseenter}
              onMouseleave={onMouseleave}
              onMousedown={onPickerMousedown}
              {...getDataOrAriaProps(props)}
            >
              <div
                class={classNames(`${prefixCls}-input`, {
                  [`${prefixCls}-input-active`]: mergedActivePickerIndex.value === 0,
                  [`${prefixCls}-input-placeholder`]: !!startHoverValue.value,
                })}
                ref={startInputDivRef}
              >
                <input
                  id={id}
                  disabled={mergedDisabled.value[0]}
                  readonly={
                    inputReadOnly || typeof formatList.value[0] === 'function' || !startTyping.value
                  }
                  value={startHoverValue.value || startText.value}
                  onInput={(e: ChangeEvent) => {
                    triggerStartTextChange(e.target.value);
                  }}
                  autofocus={autofocus}
                  placeholder={getValue(placeholder, 0) || ''}
                  ref={startInputRef}
                  {...startInputProps.value}
                  {...inputSharedProps}
                  autocomplete={autocomplete}
                />
              </div>
              <div class={`${prefixCls}-range-separator`} ref={separatorRef}>
                {separator}
              </div>
              <div
                class={classNames(`${prefixCls}-input`, {
                  [`${prefixCls}-input-active`]: mergedActivePickerIndex.value === 1,
                  [`${prefixCls}-input-placeholder`]: !!endHoverValue.value,
                })}
                ref={endInputDivRef}
              >
                <input
                  disabled={mergedDisabled.value[1]}
                  readonly={
                    inputReadOnly || typeof formatList.value[0] === 'function' || !endTyping.value
                  }
                  value={endHoverValue.value || endText.value}
                  onInput={(e: ChangeEvent) => {
                    triggerEndTextChange(e.target.value);
                  }}
                  placeholder={getValue(placeholder, 1) || ''}
                  ref={endInputRef}
                  {...endInputProps.value}
                  {...inputSharedProps}
                  autocomplete={autocomplete}
                />
              </div>
              <div
                class={`${prefixCls}-active-bar`}
                style={{
                  ...activeBarPositionStyle,
                  width: `${activeBarWidth}px`,
                  position: 'absolute',
                }}
              />
              {suffixNode}
              {clearNode}
            </div>
          </PickerTrigger>
        );
      };
    },
  });
}

const InterRangerPicker = RangerPicker<any>();
export default InterRangerPicker;
