import Event from '../../event/Event.js';
import ErrorEvent from '../../event/events/ErrorEvent.js';
import ResourceFetch from '../../fetch/ResourceFetch.js';
import CSSStyleSheet from '../../css/CSSStyleSheet.js';
import DOMException from '../../exception/DOMException.js';
import DOMExceptionNameEnum from '../../exception/DOMExceptionNameEnum.js';
/**
 * Helper class for getting the URL relative to a Location object.
 */
export default class HTMLLinkElementUtility {
    /**
     * Returns a URL relative to the given Location object.
     *
     * @param options Options.
     * @param options.element Element.
     * @param element
     */
    static async loadExternalStylesheet(element) {
        const href = element.getAttribute('href');
        const rel = element.getAttribute('rel');
        if (href !== null && rel && rel.toLowerCase() === 'stylesheet' && element.isConnected) {
            if (element.ownerDocument.defaultView.happyDOM.settings.disableCSSFileLoading) {
                this.onError(element, new DOMException(`Failed to load external stylesheet "${href}". CSS file loading is disabled.`, DOMExceptionNameEnum.notSupportedError));
                return;
            }
            element.ownerDocument._readyStateManager.startTask();
            let code;
            try {
                code = await ResourceFetch.fetch(element.ownerDocument, href);
            }
            catch (error) {
                this.onError(element, error);
                return;
            }
            const styleSheet = new CSSStyleSheet();
            styleSheet.replaceSync(code);
            element.sheet = styleSheet;
            element.dispatchEvent(new Event('load'));
            element.ownerDocument._readyStateManager.endTask();
        }
    }
    /**
     * Triggered when an error occurs.
     *
     * @param element Element.
     * @param error Error.
     */
    static onError(element, error) {
        element.dispatchEvent(new ErrorEvent('error', {
            message: error.message,
            error
        }));
        element.ownerDocument.defaultView.dispatchEvent(new ErrorEvent('error', {
            message: error.message,
            error
        }));
        element.ownerDocument._readyStateManager.endTask();
        if (!element['_listeners']['error'] &&
            !element.ownerDocument.defaultView['_listeners']['error']) {
            element.ownerDocument.defaultView.console.error(error);
        }
    }
}
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