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import {List} from 'immutable';

import {Value} from './index';

/**
 * Sass's [number type](https://sass-lang.com/documentation/values/numbers).
 *
 * @category Custom Function
 */
export class SassNumber extends Value {
  /**
   * Creates a new number with more complex units than just a single numerator.
   *
   * Upon construction, any compatible numerator and denominator units are
   * simplified away according to the conversion factor between them.
   *
   * @param value - The number's numeric value.
   *
   * @param unit - If this is a string, it's used as the single numerator unit
   * for the number.
   *
   * @param unit.numeratorUnits - If passed, these are the numerator units to
   * use for the number. This may be either a plain JavaScript array or an
   * immutable [[List]] from the [`immutable`
   * package](https://immutable-js.com/).
   *
   * @param unit.denominatorUnits - If passed, these are the denominator units
   * to use for the number. This may be either a plain JavaScript array or an
   * immutable [[List]] from the [`immutable`
   * package](https://immutable-js.com/).
   */
  constructor(
    value: number,
    unit?:
      | string
      | {
          numeratorUnits?: string[] | List<string>;
          denominatorUnits?: string[] | List<string>;
        }
  );

/** This number's numeric value. */
  get value(): number;

/** Whether [[value]] is an integer according to Sass's equality logic. */
  get isInt(): boolean;

/**
   * If [[value]] is an integer according to [[isInt]], returns [[value]]
   * rounded to that integer. If it's not an integer, returns `null`.
   */
  get asInt(): number | null;

/**
   * This number's numerator units as an immutable [[List]] from the
   * [`immutable` package](https://immutable-js.com/).
   */
  get numeratorUnits(): List<string>;

/**
   * This number's denominator units as an immutable [[List]] from the
   * [`immutable` package](https://immutable-js.com/).
   */
  get denominatorUnits(): List<string>;

/** Whether this number has any numerator or denominator units. */
  get hasUnits(): boolean;

/**
   * If [[value]] is an integer according to [[isInt]], returns it rounded to
   * that integer. Otherwise, throws an error.
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   */
  assertInt(name?: string): number;

/**
   * Returns [[value]] if it's within `min` and `max`. If [[value]] is equal to
   * `min` or `max` according to Sass's equality, returns `min` or `max`
   * respectively. Otherwise, throws an error.
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   */
  assertInRange(min: number, max: number, name?: string): number;

/**
   * If this number has no units, returns it. Otherwise, throws an error.
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   */
  assertNoUnits(name?: string): SassNumber;

/**
   * If this number has `unit` as its only unit (and as a numerator), returns
   * this number. Otherwise, throws an error.
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   */
  assertUnit(unit: string, name?: string): SassNumber;

/** Whether this number has `unit` as its only unit (and as a numerator). */
  hasUnit(unit: string): boolean;

/**
   * Whether this has exactly one numerator unit, and that unit is compatible
   * with `unit`.
   */
  compatibleWithUnit(unit: string): boolean;

/**
   * Returns a copy of this number, converted to the units represented by
   * `newNumerators` and `newDenominators`.
   *
   * @throws `Error` if this number's units are incompatible with
   * `newNumerators` and `newDenominators`; or if this number is unitless and
   * either `newNumerators` or `newDenominators` are not empty, or vice-versa.
   *
   * @param newNumerators - The numerator units to convert this number to. This
   * may be either a plain JavaScript array or an immutable [[List]] from the
   * [`immutable` package](https://immutable-js.com/).
   *
   * @param newDenominators - The denominator units to convert this number to.
   * This may be either a plain JavaScript array or an immutable [[List]] from
   * the [`immutable` package](https://immutable-js.com/).
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   */
  convert(
    newNumerators: string[] | List<string>,
    newDenominators: string[] | List<string>,
    name?: string
  ): SassNumber;

/**
   * Returns a copy of this number, converted to the same units as `other`.
   *
   * @throws `Error` if this number's units are incompatible with `other`'s
   * units, or if either number is unitless but the other is not.
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   *
   * @param otherName - The name of the function argument `other` came from
   * (without the `$`) if it came from an argument. Used for error reporting.
   */
  convertToMatch(
    other: SassNumber,
    name?: string,
    otherName?: string
  ): SassNumber;

/**
   * Returns [[value]], converted to the units represented by `newNumerators`
   * and `newDenominators`.
   *
   * @throws `Error` if this number's units are incompatible with
   * `newNumerators` and `newDenominators`; or if this number is unitless and
   * either `newNumerators` or `newDenominators` are not empty, or vice-versa.
   *
   * @param newNumerators - The numerator units to convert [[value]] to. This
   * may be either a plain JavaScript array or an immutable [[List]] from the
   * [`immutable` package](https://immutable-js.com/).
   *
   * @param newDenominators - The denominator units to convert [[value]] to.
   * This may be either a plain JavaScript array or an immutable [[List]] from
   * the [`immutable` package](https://immutable-js.com/).
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   */
  convertValue(
    newNumerators: string[] | List<string>,
    newDenominators: string[] | List<string>,
    name?: string
  ): number;

/**
   * Returns [[value]], converted to the same units as `other`.
   *
   * @throws `Error` if this number's units are incompatible with `other`'s
   * units, or if either number is unitless but the other is not.
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   *
   * @param otherName - The name of the function argument `other` came from
   * (without the `$`) if it came from an argument. Used for error reporting.
   */
  convertValueToMatch(
    other: SassNumber,
    name?: string,
    otherName?: string
  ): number;

/**
   * Returns a copy of this number, converted to the units represented by
   * `newNumerators` and `newDenominators`.
   *
   * Unlike [[convert]] this does *not* throw an error if this number is
   * unitless and either `newNumerators` or `newDenominators` are not empty, or
   * vice-versa. Instead, it treats all unitless numbers as convertible to and
   * from all units without changing the value.
   *
   * @throws `Error` if this number's units are incompatible with
   * `newNumerators` and `newDenominators`.
   *
   * @param newNumerators - The numerator units to convert this number to. This
   * may be either a plain JavaScript array or an immutable [[List]] from the
   * [`immutable` package](https://immutable-js.com/).
   *
   * @param newDenominators - The denominator units to convert this number to.
   * This may be either a plain JavaScript array or an immutable [[List]] from
   * the [`immutable` package](https://immutable-js.com/).
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   */
  coerce(
    newNumerators: string[] | List<string>,
    newDenominators: string[] | List<string>,
    name?: string
  ): SassNumber;

/**
   * Returns a copy of this number, converted to the units represented by
   * `newNumerators` and `newDenominators`.
   *
   * Unlike [[convertToMatch]] this does *not* throw an error if this number is
   * unitless and either `newNumerators` or `newDenominators` are not empty, or
   * vice-versa. Instead, it treats all unitless numbers as convertible to and
   * from all units without changing the value.
   *
   * @throws `Error` if this number's units are incompatible with `other`'s
   * units.
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   *
   * @param otherName - The name of the function argument `other` came from
   * (without the `$`) if it came from an argument. Used for error reporting.
   */
  coerceToMatch(
    other: SassNumber,
    name?: string,
    otherName?: string
  ): SassNumber;

/**
   * Returns [[value]], converted to the units represented by `newNumerators` and
   * `newDenominators`.
   *
   * Unlike [[convertValue]] this does *not* throw an error if this number is
   * unitless and either `newNumerators` or `newDenominators` are not empty, or
   * vice-versa. Instead, it treats all unitless numbers as convertible to and
   * from all units without changing the value.
   *
   * @throws `Error` if this number's units are incompatible with
   * `newNumerators` and `newDenominators`.
   *
   * @param newNumerators - The numerator units to convert [[value]] to. This
   * may be either a plain JavaScript array or an immutable [[List]] from the
   * [`immutable` package](https://immutable-js.com/).
   *
   * @param newDenominators - The denominator units to convert [[value]] to.
   * This may be either a plain JavaScript array or an immutable [[List]] from
   * the [`immutable` package](https://immutable-js.com/).
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   */
  coerceValue(
    newNumerators: string[] | List<string>,
    newDenominators: string[] | List<string>,
    name?: string
  ): number;

/**
   * Returns [[value]], converted to the units represented by `newNumerators`
   * and `newDenominators`.
   *
   * Unlike [[convertValueToMatch]] this does *not* throw an error if this
   * number is unitless and either `newNumerators` or `newDenominators` are not
   * empty, or vice-versa. Instead, it treats all unitless numbers as
   * convertible to and from all units without changing the value.
   *
   * @throws `Error` if this number's units are incompatible with `other`'s
   * units.
   *
   * @param name - The name of the function argument `this` came from (without
   * the `$`) if it came from an argument. Used for error reporting.
   *
   * @param otherName - The name of the function argument `other` came from
   * (without the `$`) if it came from an argument. Used for error reporting.
   */
  coerceValueToMatch(
    other: SassNumber,
    name?: string,
    otherName?: string
  ): number;
}