import { PureComponent, Requireable, Validator } from "react";

export type OnScrollParams = {
    clientHeight: number;
    clientWidth: number;
    scrollHeight: number;
    scrollLeft: number;
    scrollTop: number;
    scrollWidth: number;
};

export type ScrollSyncChildProps = {
    clientHeight: number;
    clientWidth: number;
    onScroll: (params: OnScrollParams) => void;
    scrollHeight: number;
    scrollLeft: number;
    scrollTop: number;
    scrollWidth: number;
};

export type ScrollSyncProps = {
    /**
     * Function responsible for rendering 2 or more virtualized components.
     * This function should implement the following signature:
     * ({ onScroll, scrollLeft, scrollTop }) => PropTypes.element
     */
    children: (props: ScrollSyncChildProps) => React.ReactNode;
    /**
     * PLEASE NOTE
     * The [key: string]: any; line is here on purpose
     * This is due to the need of force re-render of PureComponent
     * Check the following link if you want to know more
     * https://github.com/bvaughn/react-virtualized#pass-thru-props
     */
    [key: string]: any;
};

export type ScrollSyncState = {
    clientHeight: number;
    clientWidth: number;
    scrollHeight: number;
    scrollLeft: number;
    scrollTop: number;
    scrollWidth: number;
};

/**
 * HOC that simplifies the process of synchronizing scrolling between two or more virtualized components.
 */
export class ScrollSync extends PureComponent<ScrollSyncProps, ScrollSyncState> {
    static propTypes: {
        children: Validator<(props: ScrollSyncChildProps) => React.ReactNode>;
    };
}

export default ScrollSync;