import type { AlignType } from '@rc-component/trigger';
import type { PickerMode } from 'rc-picker/lib/interface';
import type { SharedTimeProps } from 'rc-picker/lib/panels/TimePanel';
import type { SelectCommonPlacement } from '../_util/motion';
import type { DirectionType } from '../config-provider';
import type { PickerLocale, PickerProps } from './generatePicker';

export function getPlaceholder(
  locale: PickerLocale,
  picker?: PickerMode,
  customizePlaceholder?: string,
): string {
  if (customizePlaceholder !== undefined) {
    return customizePlaceholder;
  }

  if (picker === 'year' && locale.lang.yearPlaceholder) {
    return locale.lang.yearPlaceholder;
  }
  if (picker === 'quarter' && locale.lang.quarterPlaceholder) {
    return locale.lang.quarterPlaceholder;
  }
  if (picker === 'month' && locale.lang.monthPlaceholder) {
    return locale.lang.monthPlaceholder;
  }
  if (picker === 'week' && locale.lang.weekPlaceholder) {
    return locale.lang.weekPlaceholder;
  }
  if (picker === 'time' && locale.timePickerLocale.placeholder) {
    return locale!.timePickerLocale.placeholder;
  }
  return locale.lang.placeholder;
}

export function getRangePlaceholder(
  locale: PickerLocale,
  picker?: PickerMode,
  customizePlaceholder?: [string, string],
) {
  if (customizePlaceholder !== undefined) {
    return customizePlaceholder;
  }

  if (picker === 'year' && locale.lang.yearPlaceholder) {
    return locale.lang.rangeYearPlaceholder;
  }
  if (picker === 'quarter' && locale.lang.quarterPlaceholder) {
    return locale.lang.rangeQuarterPlaceholder;
  }
  if (picker === 'month' && locale.lang.monthPlaceholder) {
    return locale.lang.rangeMonthPlaceholder;
  }
  if (picker === 'week' && locale.lang.weekPlaceholder) {
    return locale.lang.rangeWeekPlaceholder;
  }
  if (picker === 'time' && locale.timePickerLocale.placeholder) {
    return locale!.timePickerLocale.rangePlaceholder;
  }
  return locale.lang.rangePlaceholder;
}

export function transPlacement2DropdownAlign(
  direction: DirectionType,
  placement?: SelectCommonPlacement,
): AlignType {
  const overflow = {
    adjustX: 1,
    adjustY: 1,
  };
  switch (placement) {
    case 'bottomLeft': {
      return {
        points: ['tl', 'bl'],
        offset: [0, 4],
        overflow,
      };
    }
    case 'bottomRight': {
      return {
        points: ['tr', 'br'],
        offset: [0, 4],
        overflow,
      };
    }
    case 'topLeft': {
      return {
        points: ['bl', 'tl'],
        offset: [0, -4],
        overflow,
      };
    }
    case 'topRight': {
      return {
        points: ['br', 'tr'],
        offset: [0, -4],
        overflow,
      };
    }
    default: {
      return {
        points: direction === 'rtl' ? ['tr', 'br'] : ['tl', 'bl'],
        offset: [0, 4],
        overflow,
      };
    }
  }
}

function toArray<T>(list: T | T[]): T[] {
  if (!list) {
    return [];
  }
  return Array.isArray(list) ? list : [list];
}

export function getTimeProps<DateType, DisabledTime>(
  props: { format?: string; picker?: PickerMode } & Omit<
    SharedTimeProps<DateType>,
    'disabledTime'
  > & {
      disabledTime?: DisabledTime;
    },
) {
  const { format, picker, showHour, showMinute, showSecond, use12Hours } = props;

  const firstFormat = toArray(format)[0];
  const showTimeObj = { ...props };

  if (firstFormat && typeof firstFormat === 'string') {
    if (!firstFormat.includes('s') && showSecond === undefined) {
      showTimeObj.showSecond = false;
    }
    if (!firstFormat.includes('m') && showMinute === undefined) {
      showTimeObj.showMinute = false;
    }
    if (
      !firstFormat.includes('H') &&
      !firstFormat.includes('h') &&
      !firstFormat.includes('K') &&
      !firstFormat.includes('k') &&
      showHour === undefined
    ) {
      showTimeObj.showHour = false;
    }
    if ((firstFormat.includes('a') || firstFormat.includes('A')) && use12Hours === undefined) {
      showTimeObj.use12Hours = true;
    }
  }

  if (picker === 'time') {
    return showTimeObj;
  }

  if (typeof firstFormat === 'function') {
    // format of showTime should use default when format is custom format function
    delete showTimeObj.format;
  }

  return {
    showTime: showTimeObj,
  };
}

type AllowClear = PickerProps<unknown>['allowClear'];
type ClearIcon = PickerProps<unknown>['clearIcon'];

export function mergeAllowClear(
  allowClear: AllowClear,
  clearIcon: ClearIcon,
  defaultClearIcon: NonNullable<ClearIcon>,
) {
  if (allowClear === false) {
    return false;
  }

  const defaults = { clearIcon: clearIcon ?? defaultClearIcon };
  return typeof allowClear === 'object' ? { ...defaults, ...allowClear } : defaults;
}