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

const MenuModule        = require('./menu_module.js').MenuModule;
const ViewController    = require('./view_controller.js').ViewController;
const theme             = require('./theme.js');
const sysValidate       = require('./system_view_validate.js');

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

exports.moduleInfo = {
    name        : 'User Configuration',
    desc        : 'Module for user configuration',
    author      : 'NuSkooler',
};

const MciCodeIds = {
    RealName    : 1,
    BirthDate   : 2,
    Sex         : 3,
    Loc         : 4,
    Affils      : 5,
    Email       : 6,
    Web         : 7,
    TermHeight  : 8,
    Theme       : 9,
    Password    : 10,
    PassConfirm : 11,
    ThemeInfo   : 20,
    ErrorMsg    : 21,

    SaveCancel  : 25,
};

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

        const self = this;

        this.menuMethods = {
            //
            //  Validation support
            //
            validateEmailAvail : function(data, cb) {
                //
                //  If nothing changed, we know it's OK
                //
                if(self.client.user.properties.email_address.toLowerCase() === data.toLowerCase()) {
                    return cb(null);
                }

                //  Otherwise we can use the standard system method
                return sysValidate.validateEmailAvail(data, cb);
            },

            validatePassword : function(data, cb) {
                //
                //  Blank is OK - this means we won't be changing it
                //
                if(!data || 0 === data.length) {
                    return cb(null);
                }

                //  Otherwise we can use the standard system method
                return sysValidate.validatePasswordSpec(data, cb);
            },

            validatePassConfirmMatch : function(data, cb) {
                var passwordView = self.getView(MciCodeIds.Password);
                cb(passwordView.getData() === data ? null : new Error('Passwords do not match'));
            },

            viewValidationListener : function(err, cb) {
                var errMsgView = self.getView(MciCodeIds.ErrorMsg);
                var newFocusId;
                if(errMsgView) {
                    if(err) {
                        errMsgView.setText(err.message);

                        if(err.view.getId() === MciCodeIds.PassConfirm) {
                            newFocusId = MciCodeIds.Password;
                            var passwordView = self.getView(MciCodeIds.Password);
                            passwordView.clearText();
                            err.view.clearText();
                        }
                    } else {
                        errMsgView.clearText();
                    }
                }
                cb(newFocusId);
            },

            //
            //  Handlers
            //
            saveChanges : function(formData, extraArgs, cb) {
                assert(formData.value.password === formData.value.passwordConfirm);

                const newProperties = {
                    real_name           : formData.value.realName,
                    birthdate           : new Date(Date.parse(formData.value.birthdate)).toISOString(),
                    sex                 : formData.value.sex,
                    location            : formData.value.location,
                    affiliation         : formData.value.affils,
                    email_address       : formData.value.email,
                    web_address         : formData.value.web,
                    term_height         : formData.value.termHeight.toString(),
                    theme_id            : self.availThemeInfo[formData.value.theme].themeId,
                };

                //  runtime set theme
                theme.setClientTheme(self.client, newProperties.theme_id);

                //  persist all changes
                self.client.user.persistProperties(newProperties, err => {
                    if(err) {
                        self.client.log.warn( { error : err.toString() }, 'Failed persisting updated properties');
                        //  :TODO: warn end user!
                        return self.prevMenu(cb);
                    }
                    //
                    //  New password if it's not empty
                    //
                    self.client.log.info('User updated properties');

                    if(formData.value.password.length > 0) {
                        self.client.user.setNewAuthCredentials(formData.value.password, err => {
                            if(err) {
                                self.client.log.error( { err : err }, 'Failed storing new authentication credentials');
                            } else {
                                self.client.log.info('User changed authentication credentials');
                            }
                            return self.prevMenu(cb);
                        });
                    } else {
                        return self.prevMenu(cb);
                    }
                });
            },
        };
    }

    getView(viewId) {
        return this.viewControllers.menu.getView(viewId);
    }

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

            const self              = this;
            const vc                = self.viewControllers.menu = new ViewController( { client : self.client} );
            let currentThemeIdIndex = 0;

            async.series(
                [
                    function loadFromConfig(callback) {
                        vc.loadFromMenuConfig( { callingMenu : self, mciMap : mciData.menu }, callback);
                    },
                    function prepareAvailableThemes(callback) {
                        self.availThemeInfo = _.sortBy([...theme.getAvailableThemes()].map(entry => {
                            const theme = entry[1];
                            return {
                                themeId     : theme.info.themeId,
                                name        : theme.info.name,
                                author      : theme.info.author,
                                desc        : _.isString(theme.info.desc) ? theme.info.desc : '',
                                group       : _.isString(theme.info.group) ? theme.info.group : '',
                            };
                        }), 'name');

                        currentThemeIdIndex = Math.max(0, _.findIndex(self.availThemeInfo, function cmp(ti) {
                            return ti.themeId === self.client.user.properties.theme_id;
                        }));

                        callback(null);
                    },
                    function populateViews(callback) {
                        var user = self.client.user;

                        self.setViewText('menu', MciCodeIds.RealName, user.properties.real_name);
                        self.setViewText('menu', MciCodeIds.BirthDate, moment(user.properties.birthdate).format('YYYYMMDD'));
                        self.setViewText('menu', MciCodeIds.Sex, user.properties.sex);
                        self.setViewText('menu', MciCodeIds.Loc, user.properties.location);
                        self.setViewText('menu', MciCodeIds.Affils, user.properties.affiliation);
                        self.setViewText('menu', MciCodeIds.Email, user.properties.email_address);
                        self.setViewText('menu', MciCodeIds.Web, user.properties.web_address);
                        self.setViewText('menu', MciCodeIds.TermHeight, user.properties.term_height.toString());


                        var themeView = self.getView(MciCodeIds.Theme);
                        if(themeView) {
                            themeView.setItems(_.map(self.availThemeInfo, 'name'));
                            themeView.setFocusItemIndex(currentThemeIdIndex);
                        }

                        var realNameView = self.getView(MciCodeIds.RealName);
                        if(realNameView) {
                            realNameView.setFocus(true);    //  :TODO: HACK! menu.hjson sets focus, but manual population above breaks this. Needs a real fix!
                        }

                        callback(null);
                    }
                ],
                function complete(err) {
                    if(err) {
                        self.client.log.warn( { error : err.toString() }, 'User configuration failed to init');
                        self.prevMenu();
                    } else {
                        cb(null);
                    }
                }
            );
        });
    }
};