/* tslint:disable jsx-no-multiline-js */
import * as React from 'react';
import * as moment from 'moment';
import RangeCalendar from 'rc-calendar/lib/RangeCalendar';
import RcDatePicker from 'rc-calendar/lib/Picker';
import classNames from 'classnames';
import Icon from '../icon';
import warning from '../_util/warning';
import callMoment from '../_util/callMoment';
import { RangePickerValue, RangePickerPresetRange } from './interface';

export interface RangePickerState {
  value?: RangePickerValue;
  showDate?: RangePickerValue;
  open?: boolean;
  hoverValue?: RangePickerValue;
}

function getShowDateFromValue(value: RangePickerValue) {
  const [start, end] = value;
  // value could be an empty array, then we should not reset showDate
  if (!start && !end) {
    return;
  }
  const newEnd = end && end.isSame(start, 'month') ? end.clone().add(1, 'month') : end;
  return [start, newEnd] as RangePickerValue;
}

function formatValue(value: moment.Moment | undefined, format: string): string {
  return (value && value.format(format)) || '';
}

function pickerValueAdapter(value?: moment.Moment | RangePickerValue): RangePickerValue | undefined {
  if (!value) {
    return;
  }
  if (Array.isArray(value)) {
    return value;
  }
  return [value, value.clone().add(1, 'month')];
}

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

function fixLocale(value: RangePickerValue | undefined, localeCode: string) {
  if (!localeCode) {
    return;
  }
  if (!value || value.length === 0) {
    return;
  }
  if (value[0]) {
    value[0]!.locale(localeCode);
  }
  if (value[1]) {
    value[1]!.locale(localeCode);
  }
}

export default class RangePicker extends React.Component<any, RangePickerState> {
  static defaultProps = {
    prefixCls: 'ant-calendar',
    allowClear: true,
    showToday: false,
  };

  private picker: HTMLSpanElement;

  constructor(props: any) {
    super(props);
    const value = props.value || props.defaultValue || [];
    if (
      value[0] && !moment.isMoment(value[0]) ||
      value[1] && !moment.isMoment(value[1])
    ) {
      throw new Error(
        'The value/defaultValue of RangePicker must be a moment object array after `antd@2.0`, ' +
        'see: https://u.ant.design/date-picker-value',
      );
    }
    const pickerValue = !value || isEmptyArray(value) ? props.defaultPickerValue : value;
    this.state = {
      value,
      showDate: pickerValueAdapter(pickerValue || callMoment(moment)),
      open: props.open,
      hoverValue: [],
    };
  }

  componentWillReceiveProps(nextProps: any) {
    if ('value' in nextProps) {
      const state = this.state;
      const value = nextProps.value || [];
      this.setState({
        value,
        showDate: getShowDateFromValue(value) || state.showDate,
      });
    }
    if ('open' in nextProps) {
      this.setState({
        open: nextProps.open,
      });
    }
  }

  clearSelection = (e: React.MouseEvent<HTMLElement>) => {
    e.preventDefault();
    e.stopPropagation();
    this.setState({ value: [] });
    this.handleChange([]);
  }

  clearHoverValue = () => this.setState({ hoverValue: [] });

  handleChange = (value: RangePickerValue) => {
    const props = this.props;
    if (!('value' in props)) {
      this.setState(({ showDate }) => ({
        value,
        showDate: getShowDateFromValue(value) || showDate,
      }));
    }
    props.onChange(value, [
      formatValue(value[0], props.format),
      formatValue(value[1], props.format),
    ]);
  }

  handleOpenChange = (open: boolean) => {
    if (!('open' in this.props)) {
      this.setState({ open });
    }

    if (open === false) {
      this.clearHoverValue();
    }

    const { onOpenChange } = this.props;
    if (onOpenChange) {
      onOpenChange(open);
    }
  }

  handleShowDateChange = (showDate: RangePickerValue) => this.setState({ showDate });

  handleHoverChange = (hoverValue: any) => this.setState({ hoverValue });

  handleCalendarInputSelect = (value: RangePickerValue) => {
    this.setState(({ showDate }) => ({
      value,
      showDate: getShowDateFromValue(value) || showDate,
    }));
  }

  handleRangeClick = (value: RangePickerPresetRange) => {
    if (typeof value === 'function') {
      value = value();
    }

    this.setValue(value, true);

    const { onOk } = this.props;
    if (onOk) {
      onOk(value);
    }
  }

  setValue(value: RangePickerValue, hidePanel?: boolean) {
    this.handleChange(value);
    if ((hidePanel || !this.props.showTime) && !('open' in this.props)) {
      this.setState({ open: false });
    }
  }

  focus() {
    this.picker.focus();
  }

  blur() {
    this.picker.blur();
  }

  savePicker = (node: HTMLSpanElement) => {
    this.picker = node;
  }

  renderFooter = (...args: any[]) => {
    const { prefixCls, ranges, renderExtraFooter } = this.props;
    if (!ranges && !renderExtraFooter) {
      return null;
    }
    const customFooter = renderExtraFooter ? (
      <div className={`${prefixCls}-footer-extra`} key="extra">
        {renderExtraFooter(...args)}
      </div>
    ) : null;
    const operations = Object.keys(ranges || {}).map((range) => {
      const value = ranges[range];
      return (
        <a
          key={range}
          onClick={() => this.handleRangeClick(value)}
          onMouseEnter={() => this.setState({ hoverValue: value })}
          onMouseLeave={this.clearHoverValue}
        >
          {range}
        </a>
      );
    });
    const rangeNode = (
      <div className={`${prefixCls}-footer-extra ${prefixCls}-range-quick-selector`} key="range">
        {operations}
      </div>
    );
    return [rangeNode, customFooter];
  }

  render() {
    const { state, props } = this;
    const { value, showDate, hoverValue, open } = state;
    const {
      prefixCls, popupStyle, style,
      disabledDate, disabledTime,
      showTime, showToday,
      ranges, onOk, locale, localeCode, format,
      dateRender, onCalendarChange,
    } = props;

    fixLocale(value, localeCode);
    fixLocale(showDate, localeCode);

    warning(!('onOK' in props), 'It should be `RangePicker[onOk]`, instead of `onOK`!');

    const calendarClassName = classNames({
      [`${prefixCls}-time`]: showTime,
      [`${prefixCls}-range-with-ranges`]: ranges,
    });

    // 需要选择时间时，点击 ok 时才触发 onChange
    let pickerChangeHandler = {
      onChange: this.handleChange,
    };
    let calendarProps: any = {
      onOk: this.handleChange,
    };
    if (props.timePicker) {
      pickerChangeHandler.onChange = changedValue => this.handleChange(changedValue);
    } else {
      calendarProps = {};
    }
    if ('mode' in props) {
      calendarProps.mode = props.mode;
    }

    const startPlaceholder = ('placeholder' in props)
      ? props.placeholder[0] : locale.lang.rangePlaceholder[0];
    const endPlaceholder = ('placeholder' in props)
      ? props.placeholder[1] : locale.lang.rangePlaceholder[1];

    const calendar = (
      <RangeCalendar
        {...calendarProps}
        onChange={onCalendarChange}
        format={format}
        prefixCls={prefixCls}
        className={calendarClassName}
        renderFooter={this.renderFooter}
        timePicker={props.timePicker}
        disabledDate={disabledDate}
        disabledTime={disabledTime}
        dateInputPlaceholder={[startPlaceholder, endPlaceholder]}
        locale={locale.lang}
        onOk={onOk}
        dateRender={dateRender}
        value={showDate}
        onValueChange={this.handleShowDateChange}
        hoverValue={hoverValue}
        onHoverChange={this.handleHoverChange}
        onPanelChange={props.onPanelChange}
        showToday={showToday}
        onInputSelect={this.handleCalendarInputSelect}
      />
    );

    // default width for showTime
    const pickerStyle = {} as any;
    if (props.showTime) {
      pickerStyle.width = (style && style.width) || 350;
    }

    const clearIcon = (!props.disabled && props.allowClear && value && (value[0] || value[1])) ? (
      <Icon
        type="cross-circle"
        className={`${prefixCls}-picker-clear`}
        onClick={this.clearSelection}
      />
    ) : null;

    const input = ({ value: inputValue }: { value: any }) => {
      const start = inputValue[0];
      const end = inputValue[1];
      return (
        <span className={props.pickerInputClass}>
          <input
            disabled={props.disabled}
            readOnly
            value={(start && start.format(props.format)) || ''}
            placeholder={startPlaceholder}
            className={`${prefixCls}-range-picker-input`}
            tabIndex={-1}
          />
          <span className={`${prefixCls}-range-picker-separator`}> ~ </span>
          <input
            disabled={props.disabled}
            readOnly
            value={(end && end.format(props.format)) || ''}
            placeholder={endPlaceholder}
            className={`${prefixCls}-range-picker-input`}
            tabIndex={-1}
          />
          {clearIcon}
          <span className={`${prefixCls}-picker-icon`} />
        </span>
      );
    };

    return (
      <span
        ref={this.savePicker}
        id={props.id}
        className={classNames(props.className, props.pickerClass)}
        style={{ ...style, ...pickerStyle }}
        tabIndex={props.disabled ? -1 : 0}
        onFocus={props.onFocus}
        onBlur={props.onBlur}
      >
        <RcDatePicker
          {...props}
          {...pickerChangeHandler}
          calendar={calendar}
          value={value}
          open={open}
          onOpenChange={this.handleOpenChange}
          prefixCls={`${prefixCls}-picker-container`}
          style={popupStyle}
        >
          {input}
        </RcDatePicker>
      </span>
    );
  }
}