import type Photo from '../../data/photo';
import PowerduckState from '../../app/powerduck-state';
import { AppHttpProvider } from '../api-http';
import { DomainHelper } from './domain-helper';

const ABSOLUTE_URL_RE = /^https?:\/\//i;
const LEADING_SLASH_ABSOLUTE_RE = /^\/https?:\/\//i;

export default class FileHelper {
	static getFullPath(file: Photo) {
		if (file == null || file.path == null) {
			return null;
		}

		const rawPath = file.path.trim();

		// 1. Already-absolute URL (Bunny CDN, S3, data:, protocol-relative) — return as-is.
		if (ABSOLUTE_URL_RE.test(rawPath) || rawPath.startsWith('//') || rawPath.startsWith('data:')) {
			return rawPath;
		}

		// 2. Stray leading-slash before scheme ("/https://..."): strip the slash.
		if (LEADING_SLASH_ABSOLUTE_RE.test(rawPath)) {
			return rawPath.slice(1);
		}

		// 3. Legacy relative path (e.g. "/photos/resorts/file.png") — resolve against backend domain.
		if (AppHttpProvider.enforceDomain == '/') {
			return PowerduckState.getCdnPath() + PowerduckState.getFilesPath() + rawPath;
		}

		return DomainHelper.getDomainFromUrl(AppHttpProvider.enforceDomain, true) + PowerduckState.getFilesPath() + rawPath;
	}
}