/* jslint node: true */
'use strict';

const MenuModule		= require('./menu_module.js').MenuModule;
const User				= require('./user.js');
const ViewController	= require('./view_controller.js').ViewController;
const stringFormat		= require('./string_format.js');

const moment			= require('moment');
const async				= require('async');
const _					= require('lodash');

/*
	Available listFormat/focusListFormat object members:
	
	userId			: User ID
	userName		: User name/handle
	lastLoginTs		: Last login timestamp
	status			: Status: active | inactive
	location		: Location
	affiliation		: Affils
	note			: User note
*/

exports.moduleInfo = {
	name		: 'User List',
	desc		: 'Lists all system users',
	author		: 'NuSkooler',
};

const MciViewIds = {
	UserList	: 1,
};

exports.getModule = class UserListModule extends MenuModule {
	constructor(options) {
		super(options);
	}

	mciReady(mciData, cb) {
		super.mciReady(mciData, err => {
			if(err) {
				return cb(err);
			}

			const self		= this;
			const vc		= self.viewControllers.allViews = new ViewController( { client : self.client } );

			let userList = [];

			const USER_LIST_OPTS = {
				properties : [ 'location', 'affiliation', 'last_login_timestamp' ],
			};

			async.series(
				[
					function loadFromConfig(callback) {
						var loadOpts = {
							callingMenu		: self,
							mciMap			: mciData.menu,
						};

						vc.loadFromMenuConfig(loadOpts, callback);
					},
					function fetchUserList(callback) {
						//	:TODO: Currently fetching all users - probably always OK, but this could be paged
						User.getUserList(USER_LIST_OPTS, function got(err, ul) {
							userList = ul;
							callback(err);
						});
					},
					function populateList(callback) {
						var userListView = vc.getView(MciViewIds.UserList);

						var listFormat 		= self.menuConfig.config.listFormat || '{userName} - {affils}';
						var focusListFormat	= self.menuConfig.config.focusListFormat || listFormat;	//	:TODO: default changed color!
						var dateTimeFormat	= self.menuConfig.config.dateTimeFormat || 'ddd MMM DD';

						function getUserFmtObj(ue) {
							return {
								userId		: ue.userId,
								userName	: ue.userName,
								affils		: ue.affiliation,
								location	: ue.location,
								//	:TODO: the rest!
								note		: ue.note || '',
								lastLoginTs	: moment(ue.last_login_timestamp).format(dateTimeFormat),
							};
						}

						userListView.setItems(_.map(userList, function formatUserEntry(ue) {
							return stringFormat(listFormat, getUserFmtObj(ue));
						}));

						userListView.setFocusItems(_.map(userList, function formatUserEntry(ue) {
							return stringFormat(focusListFormat, getUserFmtObj(ue));
						}));

						userListView.redraw();
						callback(null);
					}
				],		
				function complete(err) {
					if(err) {
						self.client.log.error( { error : err.toString() }, 'Error loading user list');
					}
					cb(err);
				}
			);
		});
	}	
};