import { CSSProperties } from "styled-components";

export type Identity<Self = any> = (x: Self) => Self;

export const withSpecifiedStyles: <Self>() => Identity<Self> = () => (x) => x;

export type WithSpecifiedStyles<
  Styles extends keyof CSSProperties = keyof CSSProperties
> = Identity<{ [K in Styles]?: string | number }>;

export type PickStyles<Styles extends keyof CSSProperties = keyof CSSProperties> = {
  [K in Styles]?: string | number;
};

export type GetStylesFrom<
  WithSpecifiedStyleFn extends WithSpecifiedStyles
> = ReturnType<WithSpecifiedStyleFn>;