import type { AllowNullish, AllowNullishReturn, WithOptionalFind, WithUnit } from '../common/private-types';
import { Nullish } from '../common/private-types';
import type { DeclarativeFindUnit, MultiplierFindItem } from '../common/types';
import type { DeprecatedFormatFindUnitFunction, DeprecatedFormatGetUnitFunction } from '../deprecated-types';
export type FormatUnitOption = AllowNullish<string>;
export type FormatFindUnitFunction = (value: number) => AllowNullishReturn<MultiplierFindItem>;
export type FormatFindUnitOption = AllowNullish<DeclarativeFindUnit | FormatFindUnitFunction> | DeprecatedFormatFindUnitFunction;
export type RoundDecimals = number;
export type RoundFunction = (num: number) => string | number;
export interface FormatRoundAdvancedOptions {
    readonly dec?: AllowNullish<RoundDecimals>;
    readonly fixed?: AllowNullish<boolean>;
}
export type FormatRoundOption = AllowNullish<RoundDecimals | FormatRoundAdvancedOptions | RoundFunction | boolean>;
export type FormatOutputFunction<U extends string = string> = (value: string | number, pre: string, unit: U) => string;
export interface FormatOutputAdvancedOption {
    readonly space?: AllowNullish<string | number>;
}
export type FormatOutputOption<U extends string = string> = AllowNullish<FormatOutputFunction<U> | FormatOutputAdvancedOption>;
interface CreateFormatterOptionsBase<U extends string> extends WithOptionalFind<FormatFindUnitOption> {
    readonly round?: FormatRoundOption;
    readonly output?: FormatOutputOption<U>;
}
export interface CreateFormatterOptionsWithoutUnit extends Partial<WithUnit<Nullish>>, CreateFormatterOptionsBase<string> {
}
export interface CreateFormatterOptionsWithUnit<U extends FormatUnitOption> extends WithUnit<U | DeprecatedFormatGetUnitFunction<U extends string ? U : string>>, CreateFormatterOptionsBase<U extends string ? U : string> {
}
export type CreateFormatterOptions = Partial<CreateFormatterOptionsWithUnit<FormatUnitOption>>;
export type FormatInput = number;
export type Formatter = (value: FormatInput) => string;
export {};
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