// Class helping in correct domain obtaining for API calls and other purposes
export class DomainHelper {
	/**
	 * Get domain path for cookie storage.
	 */
	static getCookieDomain(): string {
		const schemeEndIndex = location.href.indexOf('//');
		let domainHost = location.href
			.substring(schemeEndIndex + 2)
			.split('/')[0]
			.split(':')[0]
			.trim();
		if (domainHost.toLowerCase().indexOf('www.') == 0) {
			domainHost = domainHost.substring(4);
		}

		if (domainHost.split('.').length == 2) {
			return domainHost;
		} else {
			return '';
		}
	}

	/**
	 * Get domain from given URL string
	 *
	 * @param url URL from which the domain should be extracted
	 * @param includeScheme  Determines if the scheme (http:// or https://) should be included [defaults false]
	 * @param stripLeadingWWW  Strips leading www if present [defaults false]
	 */
	static getDomainFromUrl(
		url: string,
		includeScheme?: boolean,
		stripLeadingWWW?: boolean,
	) {
		const schemeEndIndex = url.indexOf('//');
		const scheme = url.substring(0, schemeEndIndex - 1);
		let domainAuthority = url.substring(schemeEndIndex + 2).split('/')[0];
		let schemePrefix = '';

		if (includeScheme) {
			schemePrefix += `${scheme}://`;
		}

		if (stripLeadingWWW && domainAuthority.toLowerCase().indexOf('www.') == 0) {
			domainAuthority = domainAuthority.substring(4);
		}

		return schemePrefix + domainAuthority;
	}

	/**
	 * Get current domain
	 *
	 * @param includeScheme  Determines if the scheme (http:// or https://) should be included  [defaults false]
	 * @param stripLeadingWWW  Strips leading www if present  [defaults false]
	 */
	static getDomain(includeScheme?: boolean, stripLeadingWWW?: boolean) {
		return DomainHelper.getDomainFromUrl(
			location.href,
			includeScheme,
			stripLeadingWWW,
		);
	}

	/**
	 * Get current domain base (e.g. https://www.inviton.sk/one/two becomes https://www.inviton.sk)
	 */
	static getDomainForHttpLinks() {
		return DomainHelper.getDomain(true, false);
	}
}