import type { RuleSetConditionAbsolute } from 'webpack';

/**
 * Compares two regular expressions or other types of conditions to see if they are equal.
 *
 * @param x - The first condition to compare. It can be a string, a RegExp, a function that takes a string and returns a boolean, an array of RuleSetConditionAbsolute, or undefined.
 * @param y - The second condition to compare. It is always a RegExp.
 * @returns True if the conditions are equal, false otherwise.
 *
 * @remarks
 * This function compares two conditions to see if they are equal in terms of their source,
 * global, ignoreCase, and multiline properties. It is used to check if two conditions match
 * the same pattern. If the first condition is not a RegExp, the function will always return false.
 */
export const regexEqual = (
  x:
    | string
    | RegExp
    | ((value: string) => boolean)
    | RuleSetConditionAbsolute[]
    | undefined,
  y: RegExp,
): boolean => {
  return (
    x instanceof RegExp &&
    y instanceof RegExp &&
    x.source === y.source &&
    x.global === y.global &&
    x.ignoreCase === y.ignoreCase &&
    x.multiline === y.multiline
  );
};