import * as React from 'react';

declare module 'react-themable-hoc' {
    //
    // ThemeProvider
    // ----------------------------------------------------------------------

    interface ThemeProviderProps {
        theme: string;
    }

    export class ThemeProvider extends React.Component<ThemeProviderProps, {}> {}

    //
    // ThemeManager
    // ----------------------------------------------------------------------

    export interface StyleInterface {
        // TODO
        css: (styles?: any) => {} | undefined;
    }

    // TODO
    type Theme = any;

    interface ThemeStyles {
        [key: string]: React.CSSProperties;
    }

    export class ThemeManager {
        static setStyleInterface: (styleInterface: StyleInterface) => void;

        static addTheme: (themeName: string, themeStyles: Theme) => void;

        static getTheme: (themeName: string) => Theme | undefined;

        static css: (styles: ThemeStyles) => any;
    }

    //
    // themed (HOC)
    // ----------------------------------------------------------------------

    type StylesThunk<P> = (theme: Theme, props: P) => ThemeStyles;

    export interface ThemableOptions<P> {
        pure: boolean;
        shouldUpdateStyles?: (currProps: P, nextProps: P) => boolean;
        classesPropName?: string;
    }

    export interface ExtraProps {
        innerRef?: (el: any) => void;
    }

    export function themed<Props = {}, ThemeProps = {}>(
        createStyles: StylesThunk<Props> | {},
        options?: Partial<ThemableOptions<Props>>
    ): (WrappedComponent: React.ComponentType<Props & ThemeProps>) => React.ComponentType<Props & ExtraProps>;
}