/**
 * Copyright (c) 2020, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import { FunctionComponent, SVGProps, useEffect, useState } from "react";
import { SVGRLoadedInterface } from "../models";

/**
 * React Hook to resolve lazily loaded SVGs.
 *
 * @param {Promise<SVGRLoadedInterface> | SVGRLoadedInterface} imagePromise - Image to be resolved.
 * @return {[string, React.FunctionComponent<React.SVGProps<SVGSVGElement>>]}
 */
export const useSVGPromise = (
    imagePromise: Promise<SVGRLoadedInterface> | SVGRLoadedInterface
): [ string, FunctionComponent<SVGProps<SVGSVGElement>> ] => {

    const [ image, setImage ] = useState(imagePromise);
    const [ imageAsDataURL, setImageAsDataURL ] = useState<string>(null);
    const [
        imageAsReactComponent,
        setImageAsReactComponent
    ] = useState<FunctionComponent<SVGProps<SVGSVGElement>>>(null);

    useEffect(() => {
        if (image instanceof Promise) {
            image
                .then((response: SVGRLoadedInterface) => {
                    setImageAsDataURL(response?.default);
                    setImageAsReactComponent(response?.ReactComponent);
                });
        } else if (image.default || image.ReactComponent) {
            setImageAsDataURL(image.default);
            setImageAsReactComponent(image.ReactComponent);
        }
    }, [ image ]);

    return [ imageAsDataURL, imageAsReactComponent ];
};