import {UIElement} from "../UIElement";
import {UIEventSource} from "../../Logic/UIEventSource";
import {LicenseInfo} from "../../Logic/Web/Wikimedia";
import {Imgur} from "../../Logic/Web/Imgur";


export class ImgurImage extends UIElement {


    /***
     * Dictionary from url to alreayd known license info
     */
    static allLicenseInfos: any = {};
    private readonly _imageMeta: UIEventSource<LicenseInfo>;
    private readonly _imageLocation: string;

    constructor(source: string) {
        super(undefined)
        this._imageLocation = source;
        if (ImgurImage.allLicenseInfos[source] !== undefined) {
            this._imageMeta = ImgurImage.allLicenseInfos[source];
        } else {
            this._imageMeta = new UIEventSource<LicenseInfo>(null);
            ImgurImage.allLicenseInfos[source] = this._imageMeta;
            const self = this;
            Imgur.getDescriptionOfImage(source, (license) => {
                self._imageMeta.setData(license)
            })
        }
        
        this.ListenTo(this._imageMeta);
      
    }

    InnerRender(): string {
        const image = "<img src='" + this._imageLocation + "' " + "alt='' >";
        
        if(this._imageMeta.data === null){
            return image;
        }

        const attribution =
            "<span class='attribution-author'><b>" + (this._imageMeta.data.artist ?? "") + "</b></span>" + " <span class='license'>" + (this._imageMeta.data.licenseShortName ?? "") + "</span>";

        return "<div class='imgWithAttr'>" +
            image +
            "<div class='attribution'>" +
            attribution +
            "</div>" +
            "</div>";
    }


}