import * as fs from 'fs';
import { v2 as webdav } from 'webdav-server';

function getConfig(name: string) : any {
	let config = {};
	let base = "./config/" + name;
	let debug = base + '.debug.json';
	let prod = base + '.json';
	let path = fs.existsSync(debug) ? debug : prod;
	if (fs.existsSync(path)) {
		try {
			config = JSON.parse(fs.readFileSync(path, 'utf8'));
		}
		catch (err) {	
		}
	}
	return config;
}

const config = getConfig('srvconfig');
const users  = getConfig('users');

if (typeof config.port === undefined)
	config.port = 8080;
if (typeof config.realm === undefined)
	config.realm = "WebDAV";

let mountNames : string[] = [];
for (let mount in config['mounts']) {
	if (!!config['mounts'][mount] && fs.existsSync(config['mounts'][mount]))
		mountNames.push(mount);
}

// User manager (tells who are the users)
const userManager: webdav.SimpleUserManager = new webdav.SimpleUserManager();
const privilegeManager: webdav.SimplePathPrivilegeManager = new webdav.SimplePathPrivilegeManager();
for (let nuser = 0 ; nuser < users.length; nuser++) {
	let isAdmin = !!users[nuser]['isAdmin'];
	const user = userManager.addUser(users[nuser]['username'], users[nuser]['password'], isAdmin);
	if (isAdmin) {
		privilegeManager.setRights(user, '/', [ 'all' ]);
	}
	else {
		if (!!users[nuser]['access']) {
			for (let userMount in users[nuser]['access']) {
				if (mountNames.includes(userMount) && !!users[nuser]['access'][userMount]) {
					privilegeManager.setRights(user, '/' + userMount, users[nuser]['access'][userMount]);					
				}
			}
		}
	}
	console.log(user);
}

const httpAuthentication = new webdav.HTTPBasicAuthentication(userManager);

const serverOptions: webdav.WebDAVServerOptions = {
	port: config.port || 8080,
	requireAuthentification: true,
	httpAuthentication,
	privilegeManager,
};
//serverOptions['userManager'] = userManager;

const server = new webdav.WebDAVServer(serverOptions);

let nMount = 0;

//@ts-ignore
function mountAndStart() : void {
	if (nMount < mountNames.length)	{
		let fsEntry = mountNames[nMount];
		let realPath = config['mounts'][fsEntry];
		nMount++;
		console.log(`FileSystem ${fsEntry} -> ${realPath}`)
		server.setFileSystem(
			'/' + fsEntry, new webdav.PhysicalFileSystem(realPath), (_success) => {mountAndStart();});			
	}
	else {
		server.start(httpServer => {
			console.log('Server started with success on the port : ' + httpServer.address()['port']);
		});	
	}
}
mountAndStart();