type DatabasePathInfo = {
	directories: string[];
	fileName: string;
	tempFileNames: string[];
	getDirectoryHandle: () => Promise<FileSystemDirectoryHandle>;
};

export function parseDatabasePath(path: string): DatabasePathInfo {
	const directories = path.split(/[\\/]/).filter((part) => part !== '');
	const fileName = directories.pop();

	if (!fileName) {
		throw new Error('Database path is invalid.');
	}

	const tempFileNames = ['journal', 'wal', 'shm'].map(
		(ext) => `${fileName}-${ext}`
	);

	const getDirectoryHandle = async (): Promise<FileSystemDirectoryHandle> => {
		let dirHandle = await navigator.storage.getDirectory();
		for (let dirName of directories)
			dirHandle = await dirHandle.getDirectoryHandle(dirName);
		return dirHandle;
	};

	return {
		directories,
		fileName,
		tempFileNames,
		getDirectoryHandle,
	};
}