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

//  ENiGMA½
const { MenuModule }            = require('./menu_module.js');
const { ViewController }        = require('./view_controller.js');
const ansi                      = require('./ansi_term.js');
const theme                     = require('./theme.js');
const Message                   = require('./message.js');
const {
    updateMessageAreaLastReadId
}                               = require('./message_area.js');
const { getMessageAreaByTag }   = require('./message_area.js');
const User                      = require('./user.js');
const StatLog                   = require('./stat_log.js');
const stringFormat              = require('./string_format.js');
const {
    MessageAreaConfTempSwitcher
}                               = require('./mod_mixins.js');
const {
    isAnsi, cleanControlCodes,
    insert
}                               = require('./string_util.js');
const Config                    = require('./config.js').get;
const { getAddressedToInfo }    = require('./mail_util.js');
const Events                    = require('./events.js');
const UserProps                 = require('./user_property.js');
const SysProps                  = require('./system_property.js');

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

exports.moduleInfo = {
    name    : 'Full Screen Editor (FSE)',
    desc    : 'A full screen editor/viewer',
    author  : 'NuSkooler',
};

const MciViewIds = {
    header : {
        from                : 1,
        to                  : 2,
        subject             : 3,
        errorMsg            : 4,
        modTimestamp        : 5,
        msgNum              : 6,
        msgTotal            : 7,

        customRangeStart    : 10,   //  10+ = customs
    },

    body : {
        message : 1,
    },

    //  :TODO: quote builder MCIs - remove all magic #'s

    //  :TODO: consolidate all footer MCI's - remove all magic #'s
    ViewModeFooter : {
        MsgNum          : 6,
        MsgTotal        : 7,
        //  :TODO: Just use custom ranges
    },

    quoteBuilder : {
        quotedMsg   : 1,
        //  2 NYI
        quoteLines  : 3,
    }
};

/*
    Custom formatting:
    header
        fromUserName
        toUserName

        fromRealName (may be fromUserName) NYI
        toRealName (may be toUserName) NYI

        fromRemoteUser (may be "N/A")
        toRemoteUser (may be "N/A")
        subject
        modTimestamp
        msgNum
        msgTotal (in area)
        messageId
*/

//  :TODO: convert code in this class to newer styles, conventions, etc. There is a lot of experimental stuff here that has better (DRY) alternatives

exports.FullScreenEditorModule = exports.getModule = class FullScreenEditorModule extends MessageAreaConfTempSwitcher(MenuModule) {

    constructor(options) {
        super(options);

        const self      = this;
        const config    = this.menuConfig.config;

        //
        //  menuConfig.config:
        //      editorType              : email | area
        //      editorMode              : view | edit | quote
        //
        //  menuConfig.config or extraArgs
        //      messageAreaTag
        //      messageIndex / messageTotal
        //      toUserId
        //
        this.editorType         = config.editorType;
        this.editorMode         = config.editorMode;

        if(config.messageAreaTag) {
            //  :TODO: swtich to this.config.messageAreaTag so we can follow Object.assign pattern for config/extraArgs
            this.messageAreaTag = config.messageAreaTag;
        }

        this.messageIndex       = config.messageIndex || 0;
        this.messageTotal       = config.messageTotal || 0;
        this.toUserId           = config.toUserId || 0;

        //  extraArgs can override some config
        if(_.isObject(options.extraArgs)) {
            if(options.extraArgs.messageAreaTag) {
                this.messageAreaTag = options.extraArgs.messageAreaTag;
            }
            if(options.extraArgs.messageIndex) {
                this.messageIndex = options.extraArgs.messageIndex;
            }
            if(options.extraArgs.messageTotal) {
                this.messageTotal = options.extraArgs.messageTotal;
            }
            if(options.extraArgs.toUserId) {
                this.toUserId = options.extraArgs.toUserId;
            }
        }

        this.noUpdateLastReadId = _.get(options, 'extraArgs.noUpdateLastReadId', config.noUpdateLastReadId) || false;

        this.isReady = false;

        if(_.has(options, 'extraArgs.message')) {
            this.setMessage(options.extraArgs.message);
        } else if(_.has(options, 'extraArgs.replyToMessage')) {
            this.replyToMessage = options.extraArgs.replyToMessage;
        }

        this.menuMethods = {
            //
            //  Validation stuff
            //
            viewValidationListener : function(err, cb) {
                var errMsgView = self.viewControllers.header.getView(MciViewIds.header.errorMsg);
                var newFocusViewId;
                if(errMsgView) {
                    if(err) {
                        errMsgView.setText(err.message);

                        if(MciViewIds.header.subject === err.view.getId()) {
                            //  :TODO: for "area" mode, should probably just bail if this is emtpy (e.g. cancel)
                        }
                    } else {
                        errMsgView.clearText();
                    }
                }
                cb(newFocusViewId);
            },
            headerSubmit : function(formData, extraArgs, cb) {
                self.switchToBody();
                return cb(null);
            },
            editModeEscPressed : function(formData, extraArgs, cb) {
                self.footerMode = 'editor' === self.footerMode ? 'editorMenu' : 'editor';

                self.switchFooter(function next(err) {
                    if(err) {
                        return cb(err);
                    }

                    switch(self.footerMode) {
                        case 'editor' :
                            if(!_.isUndefined(self.viewControllers.footerEditorMenu)) {
                                self.viewControllers.footerEditorMenu.detachClientEvents();
                            }
                            self.viewControllers.body.switchFocus(1);
                            self.observeEditorEvents();
                            break;

                        case 'editorMenu' :
                            self.viewControllers.body.setFocus(false);
                            self.viewControllers.footerEditorMenu.switchFocus(1);
                            break;

                        default : throw new Error('Unexpected mode');
                    }

                    return cb(null);
                });
            },
            editModeMenuQuote : function(formData, extraArgs, cb) {
                self.viewControllers.footerEditorMenu.setFocus(false);
                self.displayQuoteBuilder();
                return cb(null);
            },
            appendQuoteEntry: function(formData, extraArgs, cb) {
                const quoteMsgView = self.viewControllers.quoteBuilder.getView(MciViewIds.quoteBuilder.quotedMsg);

                if(self.newQuoteBlock) {
                    self.newQuoteBlock = false;

                    //  :TODO: If replying to ANSI, add a blank sepration line here

                    quoteMsgView.addText(self.getQuoteByHeader());
                }

                const quoteListView = self.viewControllers.quoteBuilder.getView(MciViewIds.quoteBuilder.quoteLines);
                const quoteText     = quoteListView.getItem(formData.value.quote);

                quoteMsgView.addText(quoteText);

                //
                //  If this is *not* the last item, advance. Otherwise, do nothing as we
                //  don't want to jump back to the top and repeat already quoted lines
                //

                if(quoteListView.getData() !== quoteListView.getCount() - 1) {
                    quoteListView.focusNext();
                } else {
                    self.quoteBuilderFinalize();
                }

                return cb(null);
            },
            quoteBuilderEscPressed : function(formData, extraArgs, cb) {
                self.quoteBuilderFinalize();
                return cb(null);
            },
            /*
            replyDiscard : function(formData, extraArgs) {
                //  :TODO: need to prompt yes/no
                //  :TODO: @method for fallback would be better
                self.prevMenu();
            },
            */
            editModeMenuHelp : function(formData, extraArgs, cb) {
                self.viewControllers.footerEditorMenu.setFocus(false);
                return self.displayHelp(cb);
            },
            ///////////////////////////////////////////////////////////////////////
            //  View Mode
            ///////////////////////////////////////////////////////////////////////
            viewModeMenuHelp : function(formData, extraArgs, cb) {
                self.viewControllers.footerView.setFocus(false);
                return self.displayHelp(cb);
            }
        };
    }

    isEditMode() {
        return 'edit' === this.editorMode;
    }

    isViewMode() {
        return 'view' === this.editorMode;
    }

    isPrivateMail() {
        return Message.WellKnownAreaTags.Private === this.messageAreaTag;
    }

    isReply() {
        return !_.isUndefined(this.replyToMessage);
    }

    getFooterName() {
        return 'footer' + _.upperFirst(this.footerMode);    //  e.g. 'footerEditor', 'footerEditorMenu', ...
    }

    getFormId(name) {
        return {
            header              : 0,
            body                : 1,
            footerEditor        : 2,
            footerEditorMenu    : 3,
            footerView          : 4,
            quoteBuilder        : 5,

            help                : 50,
        }[name];
    }

    getHeaderFormatObj() {
        const remoteUserNotAvail    = this.menuConfig.config.remoteUserNotAvail || 'N/A';
        const localUserIdNotAvail   = this.menuConfig.config.localUserIdNotAvail || 'N/A';
        const modTimestampFormat    = this.menuConfig.config.modTimestampFormat || this.client.currentTheme.helpers.getDateTimeFormat();

        return {
            //  :TODO: ensure we show real names for form/to if they are enforced in the area
            fromUserName        : this.message.fromUserName,
            toUserName          : this.message.toUserName,
            //  :TODO:
            //fromRealName
            //toRealName
            fromUserId          : _.get(this.message, 'meta.System.local_from_user_id', localUserIdNotAvail),
            toUserId            : _.get(this.message, 'meta.System.local_to_user_id', localUserIdNotAvail),
            fromRemoteUser      : _.get(this.message, 'meta.System.remote_from_user', remoteUserNotAvail),
            toRemoteUser        : _.get(this.messgae, 'meta.System.remote_to_user', remoteUserNotAvail),
            subject             : this.message.subject,
            modTimestamp        : this.message.modTimestamp.format(modTimestampFormat),
            msgNum              : this.messageIndex + 1,
            msgTotal            : this.messageTotal,
            messageId           : this.message.messageId,
        };
    }

    setInitialFooterMode() {
        switch(this.editorMode) {
            case 'edit' : this.footerMode = 'editor'; break;
            case 'view' : this.footerMode = 'view'; break;
        }
    }

    buildMessage(cb) {
        const headerValues = this.viewControllers.header.getFormData().value;

        const msgOpts = {
            areaTag         : this.messageAreaTag,
            toUserName      : headerValues.to,
            fromUserName    : this.client.user.username,
            subject         : headerValues.subject,
            //  :TODO: don't hard code 1 here:
            message         : this.viewControllers.body.getView(MciViewIds.body.message).getData( { forceLineTerms : this.replyIsAnsi } ),
        };

        if(this.isReply()) {
            msgOpts.replyToMsgId    = this.replyToMessage.messageId;

            if(this.replyIsAnsi) {
                //
                //  Ensure first characters indicate ANSI for detection down
                //  the line (other boards/etc.). We also set explicit_encoding
                //  to packetAnsiMsgEncoding (generally cp437) as various boards
                //  really don't like ANSI messages in UTF-8 encoding (they should!)
                //
                msgOpts.meta        = { System : { 'explicit_encoding' : _.get(Config(), 'scannerTossers.ftn_bso.packetAnsiMsgEncoding', 'cp437') } };
                msgOpts.message     = `${ansi.reset()}${ansi.eraseData(2)}${ansi.goto(1,1)}\r\n${ansi.up()}${msgOpts.message}`;
            }
        }

        this.message = new Message(msgOpts);

        return cb(null);
    }

    updateLastReadId(cb) {
        if(this.noUpdateLastReadId) {
            return cb(null);
        }

        return updateMessageAreaLastReadId(
            this.client.user.userId, this.messageAreaTag, this.message.messageId, cb
        );
    }

    setMessage(message) {
        this.message = message;

        this.updateLastReadId( () => {
            if(this.isReady) {
                this.initHeaderViewMode();
                this.initFooterViewMode();

                const bodyMessageView   = this.viewControllers.body.getView(MciViewIds.body.message);
                let msg                 = this.message.message;

                if(bodyMessageView && _.has(this, 'message.message')) {
                    //
                    //  We handle ANSI messages differently than standard messages -- this is required as
                    //  we don't want to do things like word wrap ANSI, but instead, trust that it's formatted
                    //  how the author wanted it
                    //
                    if(isAnsi(msg)) {
                        //
                        //  Find tearline - we want to color it differently.
                        //
                        const tearLinePos = this.message.getTearLinePosition(msg);

                        if(tearLinePos > -1) {
                            msg = insert(msg, tearLinePos, bodyMessageView.getSGRFor('text'));
                        }

                        bodyMessageView.setAnsi(
                            msg.replace(/\r?\n/g, '\r\n'),  //  messages are stored with CRLF -> LF
                            {
                                prepped             : false,
                                forceLineTerm       : true,
                            }
                        );
                    } else {
                        bodyMessageView.setText(cleanControlCodes(msg));
                    }
                }
            }
        });
    }

    getMessage(cb) {
        const self = this;

        async.series(
            [
                function buildIfNecessary(callback) {
                    if(self.isEditMode()) {
                        return self.buildMessage(callback); //  creates initial self.message
                    }

                    return callback(null);
                },
                function populateLocalUserInfo(callback) {
                    self.message.setLocalFromUserId(self.client.user.userId);

                    if(!self.isPrivateMail()) {
                        return callback(null);
                    }

                    if(self.toUserId > 0) {
                        self.message.setLocalToUserId(self.toUserId);
                        return callback(null);
                    }

                    //
                    //  If the message we're replying to is from a remote user
                    //  don't try to look up the local user ID. Instead, mark the mail
                    //  for export with the remote to address.
                    //
                    if(self.replyToMessage && self.replyToMessage.isFromRemoteUser()) {
                        self.message.setRemoteToUser(self.replyToMessage.meta.System[Message.SystemMetaNames.RemoteFromUser]);
                        self.message.setExternalFlavor(self.replyToMessage.meta.System[Message.SystemMetaNames.ExternalFlavor]);
                        return callback(null);
                    }

                    //
                    //  Detect if the user is attempting to send to a remote mail type that we support
                    //
                    //  :TODO: how to plug in support without tying to various types here? isSupportedExteranlType() or such
                    const addressedToInfo = getAddressedToInfo(self.message.toUserName);
                    if(addressedToInfo.name && Message.AddressFlavor.FTN === addressedToInfo.flavor) {
                        self.message.setRemoteToUser(addressedToInfo.remote);
                        self.message.setExternalFlavor(addressedToInfo.flavor);
                        self.message.toUserName = addressedToInfo.name;
                        return callback(null);
                    }

                    //  we need to look it up
                    User.getUserIdAndNameByLookup(self.message.toUserName, (err, toUserId) => {
                        if(err) {
                            return callback(err);
                        }

                        self.message.setLocalToUserId(toUserId);
                        return callback(null);
                    });
                }
            ],
            err => {
                return cb(err, self.message);
            }
        );
    }

    updateUserAndSystemStats(cb) {
        if(Message.isPrivateAreaTag(this.message.areaTag)) {
            Events.emit(Events.getSystemEvents().UserSendMail, { user : this.client.user });
            if(cb) {
                cb(null);
            }
            return; //  don't inc stats for private messages
        }

        Events.emit(Events.getSystemEvents().UserPostMessage, { user : this.client.user, areaTag : this.message.areaTag });

        StatLog.incrementNonPersistentSystemStat(SysProps.MessageTotalCount, 1);
        StatLog.incrementNonPersistentSystemStat(SysProps.MessagesToday, 1);
        return StatLog.incrementUserStat(this.client.user, UserProps.MessagePostCount, 1, cb);
    }

    redrawFooter(options, cb) {
        const self = this;

        async.waterfall(
            [
                function moveToFooterPosition(callback) {
                    //
                    //  Calculate footer starting position
                    //
                    //  row = (header height + body height)
                    //
                    var footerRow = self.header.height + self.body.height;
                    self.client.term.rawWrite(ansi.goto(footerRow, 1));
                    callback(null);
                },
                function clearFooterArea(callback) {
                    if(options.clear) {
                        //  footer up to 3 rows in height

                        //  :TODO: We'd like to delete up to N rows, but this does not work
                        //  in NetRunner:
                        self.client.term.rawWrite(ansi.reset() + ansi.deleteLine(3));

                        self.client.term.rawWrite(ansi.reset() + ansi.eraseLine(2));
                    }
                    callback(null);
                },
                function displayFooterArt(callback) {
                    const footerArt = self.menuConfig.config.art[options.footerName];

                    theme.displayThemedAsset(
                        footerArt,
                        self.client,
                        { font : self.menuConfig.font },
                        function displayed(err, artData) {
                            callback(err, artData);
                        }
                    );
                }
            ],
            function complete(err, artData) {
                cb(err, artData);
            }
        );
    }

    redrawScreen(cb) {
        var comps   = [ 'header', 'body' ];
        const self  = this;
        var art     = self.menuConfig.config.art;

        self.client.term.rawWrite(ansi.resetScreen());

        async.series(
            [
                function displayHeaderAndBody(callback) {
                    async.eachSeries( comps, function dispArt(n, next) {
                        theme.displayThemedAsset(
                            art[n],
                            self.client,
                            { font : self.menuConfig.font },
                            function displayed(err) {
                                next(err);
                            }
                        );
                    }, function complete(err) {
                        //self.body.height = self.client.term.termHeight - self.header.height - 1;
                        callback(err);
                    });
                },
                function displayFooter(callback) {
                    //  we have to treat the footer special
                    self.redrawFooter( { clear : false, footerName : self.getFooterName() }, function footerDisplayed(err) {
                        callback(err);
                    });
                },
                function refreshViews(callback) {
                    comps.push(self.getFooterName());

                    comps.forEach(function artComp(n) {
                        self.viewControllers[n].redrawAll();
                    });

                    callback(null);
                }
            ],
            function complete(err) {
                cb(err);
            }
        );
    }

    switchFooter(cb) {
        var footerName = this.getFooterName();

        this.redrawFooter( { footerName : footerName, clear : true }, (err, artData) => {
            if(err) {
                cb(err);
                return;
            }

            var formId = this.getFormId(footerName);

            if(_.isUndefined(this.viewControllers[footerName])) {
                var menuLoadOpts = {
                    callingMenu : this,
                    formId      : formId,
                    mciMap      : artData.mciMap
                };

                this.addViewController(
                    footerName,
                    new ViewController( { client : this.client, formId : formId } )
                ).loadFromMenuConfig(menuLoadOpts, err => {
                    cb(err);
                });
            } else {
                this.viewControllers[footerName].redrawAll();
                cb(null);
            }
        });
    }

    initSequence() {
        var mciData = { };
        const self  = this;
        var art     = self.menuConfig.config.art;

        assert(_.isObject(art));

        async.series(
            [
                function beforeDisplayArt(callback) {
                    self.beforeArt(callback);
                },
                function displayHeaderAndBodyArt(callback) {
                    async.eachSeries( [ 'header', 'body' ], function dispArt(n, next) {
                        theme.displayThemedAsset(
                            art[n],
                            self.client,
                            { font : self.menuConfig.font },
                            function displayed(err, artData) {
                                if(artData) {
                                    mciData[n] = artData;
                                    self[n] = { height : artData.height };
                                }

                                next(err);
                            }
                        );
                    }, function complete(err) {
                        callback(err);
                    });
                },
                function displayFooter(callback) {
                    self.setInitialFooterMode();

                    var footerName = self.getFooterName();

                    self.redrawFooter( { footerName : footerName }, function artDisplayed(err, artData) {
                        mciData[footerName] = artData;
                        callback(err);
                    });
                },
                function afterArtDisplayed(callback) {
                    self.mciReady(mciData, callback);
                }
            ],
            function complete(err) {
                if(err) {
                    self.client.log.warn( { error : err.message }, 'FSE init error');
                } else {
                    self.isReady = true;
                    self.finishedLoading();
                }
            }
        );
    }

    createInitialViews(mciData, cb) {
        const self = this;
        var menuLoadOpts = { callingMenu : self };

        async.series(
            [
                function header(callback) {
                    menuLoadOpts.formId = self.getFormId('header');
                    menuLoadOpts.mciMap = mciData.header.mciMap;

                    self.addViewController(
                        'header',
                        new ViewController( { client : self.client, formId : menuLoadOpts.formId } )
                    ).loadFromMenuConfig(menuLoadOpts, function headerReady(err) {
                        callback(err);
                    });
                },
                function body(callback) {
                    menuLoadOpts.formId = self.getFormId('body');
                    menuLoadOpts.mciMap = mciData.body.mciMap;

                    self.addViewController(
                        'body',
                        new ViewController( { client : self.client, formId : menuLoadOpts.formId } )
                    ).loadFromMenuConfig(menuLoadOpts, function bodyReady(err) {
                        callback(err);
                    });
                },
                function footer(callback) {
                    var footerName = self.getFooterName();

                    menuLoadOpts.formId = self.getFormId(footerName);
                    menuLoadOpts.mciMap = mciData[footerName].mciMap;

                    self.addViewController(
                        footerName,
                        new ViewController( { client : self.client, formId : menuLoadOpts.formId } )
                    ).loadFromMenuConfig(menuLoadOpts, function footerReady(err) {
                        callback(err);
                    });
                },
                function prepareViewStates(callback) {
                    var header = self.viewControllers.header;
                    var from = header.getView(MciViewIds.header.from);
                    from.acceptsFocus = false;
                    //from.setText(self.client.user.username);

                    //  :TODO: make this a method
                    var body = self.viewControllers.body.getView(MciViewIds.body.message);
                    self.updateTextEditMode(body.getTextEditMode());
                    self.updateEditModePosition(body.getEditPosition());

                    //  :TODO: If view mode, set body to read only... which needs an impl...

                    callback(null);
                },
                function setInitialData(callback) {

                    switch(self.editorMode) {
                        case 'view' :
                            if(self.message) {
                                self.initHeaderViewMode();
                                self.initFooterViewMode();

                                var bodyMessageView = self.viewControllers.body.getView(MciViewIds.body.message);
                                if(bodyMessageView && _.has(self, 'message.message')) {
                                    //self.setBodyMessageViewText();
                                    bodyMessageView.setText(cleanControlCodes(self.message.message));
                                }
                            }
                            break;

                        case 'edit' :
                            {
                                const fromView = self.viewControllers.header.getView(MciViewIds.header.from);
                                const area = getMessageAreaByTag(self.messageAreaTag);
                                if(area && area.realNames) {
                                    fromView.setText(self.client.user.properties[UserProps.RealName] || self.client.user.username);
                                } else {
                                    fromView.setText(self.client.user.username);
                                }

                                if(self.replyToMessage) {
                                    self.initHeaderReplyEditMode();
                                }
                            }
                            break;
                    }

                    callback(null);
                },
                function setInitialFocus(callback) {

                    switch(self.editorMode) {
                        case 'edit' :
                            self.switchToHeader();
                            break;

                        case 'view' :
                            self.switchToFooter();
                            //self.observeViewPosition();
                            break;
                    }

                    callback(null);
                }
            ],
            function complete(err) {
                return cb(err);
            }
        );
    }

    mciReadyHandler(mciData, cb) {

        this.createInitialViews(mciData, err => {
            //  :TODO: Can probably be replaced with @systemMethod:validateUserNameExists when the framework is in
            //  place - if this is for existing usernames else validate spec

            /*
            self.viewControllers.header.on('leave', function headerViewLeave(view) {

                if(2 === view.id) { //  "to" field
                    self.validateToUserName(view.getData(), function result(err) {
                        if(err) {
                            //  :TODO: display a error in a %TL area or such
                            view.clearText();
                            self.viewControllers.headers.switchFocus(2);
                        }
                    });
                }
            });*/

            cb(err);
        });
    }

    updateEditModePosition(pos) {
        if(this.isEditMode()) {
            var posView = this.viewControllers.footerEditor.getView(1);
            if(posView) {
                this.client.term.rawWrite(ansi.savePos());
                //  :TODO: Use new formatting techniques here, e.g. state.cursorPositionRow, cursorPositionCol and cursorPositionFormat
                posView.setText(_.padStart(String(pos.row + 1), 2, '0') + ',' + _.padEnd(String(pos.col + 1), 2, '0'));
                this.client.term.rawWrite(ansi.restorePos());
            }
        }
    }

    updateTextEditMode(mode) {
        if(this.isEditMode()) {
            var modeView = this.viewControllers.footerEditor.getView(2);
            if(modeView) {
                this.client.term.rawWrite(ansi.savePos());
                modeView.setText('insert' === mode ? 'INS' : 'OVR');
                this.client.term.rawWrite(ansi.restorePos());
            }
        }
    }

    setHeaderText(id, text) {
        this.setViewText('header', id, text);
    }

    initHeaderViewMode() {
        this.setHeaderText(MciViewIds.header.from,          this.message.fromUserName);
        this.setHeaderText(MciViewIds.header.to,            this.message.toUserName);
        this.setHeaderText(MciViewIds.header.subject,       this.message.subject);
        this.setHeaderText(MciViewIds.header.modTimestamp,  moment(this.message.modTimestamp).format(this.client.currentTheme.helpers.getDateTimeFormat()));
        this.setHeaderText(MciViewIds.header.msgNum,        (this.messageIndex + 1).toString());
        this.setHeaderText(MciViewIds.header.msgTotal,      this.messageTotal.toString());

        this.updateCustomViewTextsWithFilter('header', MciViewIds.header.customRangeStart, this.getHeaderFormatObj());

        //  if we changed conf/area we need to update any related standard MCI view
        this.refreshPredefinedMciViewsByCode('header', [ 'MA', 'MC', 'ML', 'CM' ] );
    }

    initHeaderReplyEditMode() {
        assert(_.isObject(this.replyToMessage));

        this.setHeaderText(MciViewIds.header.to, this.replyToMessage.fromUserName);

        //
        //  We want to prefix the subject with "RE: " only if it's not already
        //  that way -- avoid RE: RE: RE: RE: ...
        //
        let newSubj = this.replyToMessage.subject;
        if(false === /^RE:\s+/i.test(newSubj)) {
            newSubj = `RE: ${newSubj}`;
        }

        this.setHeaderText(MciViewIds.header.subject,   newSubj);
    }

    initFooterViewMode() {
        this.setViewText('footerView', MciViewIds.ViewModeFooter.msgNum, (this.messageIndex + 1).toString() );
        this.setViewText('footerView', MciViewIds.ViewModeFooter.msgTotal, this.messageTotal.toString() );
    }

    displayHelp(cb) {
        this.client.term.rawWrite(ansi.resetScreen());

        theme.displayThemeArt(
            { name : this.menuConfig.config.art.help, client : this.client },
            () => {
                this.client.waitForKeyPress( () => {
                    this.redrawScreen( () => {
                        this.viewControllers[this.getFooterName()].setFocus(true);
                        return cb(null);
                    });
                });
            }
        );
    }

    displayQuoteBuilder() {
        //
        //  Clear body area
        //
        this.newQuoteBlock = true;
        const self = this;

        async.waterfall(
            [
                function clearAndDisplayArt(callback) {
                    //  :TODO: NetRunner does NOT support delete line, so this does not work:
                    self.client.term.rawWrite(
                        ansi.goto(self.header.height + 1, 1) +
                        ansi.deleteLine((self.client.term.termHeight - self.header.height) - 1));

                    theme.displayThemeArt( { name : self.menuConfig.config.art.quote, client : self.client }, function displayed(err, artData) {
                        callback(err, artData);
                    });
                },
                function createViewsIfNecessary(artData, callback) {
                    var formId = self.getFormId('quoteBuilder');

                    if(_.isUndefined(self.viewControllers.quoteBuilder)) {
                        var menuLoadOpts = {
                            callingMenu : self,
                            formId      : formId,
                            mciMap      : artData.mciMap,
                        };

                        self.addViewController(
                            'quoteBuilder',
                            new ViewController( { client : self.client, formId : formId } )
                        ).loadFromMenuConfig(menuLoadOpts, function quoteViewsReady(err) {
                            callback(err);
                        });
                    } else {
                        self.viewControllers.quoteBuilder.redrawAll();
                        callback(null);
                    }
                },
                function loadQuoteLines(callback) {
                    const quoteView = self.viewControllers.quoteBuilder.getView(MciViewIds.quoteBuilder.quoteLines);
                    const bodyView  = self.viewControllers.body.getView(MciViewIds.body.message);

                    self.replyToMessage.getQuoteLines(
                        {
                            termWidth           : self.client.term.termWidth,
                            termHeight          : self.client.term.termHeight,
                            cols                : quoteView.dimens.width,
                            startCol            : quoteView.position.col,
                            ansiResetSgr        : bodyView.styleSGR1,
                            ansiFocusPrefixSgr  : quoteView.styleSGR2,
                        },
                        (err, quoteLines, focusQuoteLines, replyIsAnsi) => {
                            if(err) {
                                return callback(err);
                            }

                            self.replyIsAnsi = replyIsAnsi;

                            quoteView.setItems(quoteLines);
                            quoteView.setFocusItems(focusQuoteLines);

                            self.viewControllers.quoteBuilder.getView(MciViewIds.quoteBuilder.quotedMsg).setFocus(false);
                            self.viewControllers.quoteBuilder.switchFocus(MciViewIds.quoteBuilder.quoteLines);

                            return callback(null);
                        }
                    );
                },
            ],
            function complete(err) {
                if(err) {
                    self.client.log.warn( { error : err.message }, 'Error displaying quote builder');
                }
            }
        );
    }

    observeEditorEvents() {
        const bodyView = this.viewControllers.body.getView(MciViewIds.body.message);

        bodyView.on('edit position', pos => {
            this.updateEditModePosition(pos);
        });

        bodyView.on('text edit mode', mode => {
            this.updateTextEditMode(mode);
        });
    }

    /*
    this.observeViewPosition = function() {
        self.viewControllers.body.getView(MciViewIds.body.message).on('edit position', function positionUpdate(pos) {
            console.log(pos.percent + ' / ' + pos.below)
        });
    };
    */

    switchToHeader() {
        this.viewControllers.body.setFocus(false);
        this.viewControllers.header.switchFocus(2); //  to
    }

    switchToBody() {
        this.viewControllers.header.setFocus(false);
        this.viewControllers.body.switchFocus(1);

        this.observeEditorEvents();
    }

    switchToFooter() {
        this.viewControllers.header.setFocus(false);
        this.viewControllers.body.setFocus(false);

        this.viewControllers[this.getFooterName()].switchFocus(1);  //  HM1
    }

    switchFromQuoteBuilderToBody() {
        this.viewControllers.quoteBuilder.setFocus(false);
        var body = this.viewControllers.body.getView(MciViewIds.body.message);
        body.redraw();
        this.viewControllers.body.switchFocus(1);

        //  :TODO: create method (DRY)

        this.updateTextEditMode(body.getTextEditMode());
        this.updateEditModePosition(body.getEditPosition());

        this.observeEditorEvents();
    }

    quoteBuilderFinalize() {
        //  :TODO: fix magic #'s
        const quoteMsgView  = this.viewControllers.quoteBuilder.getView(MciViewIds.quoteBuilder.quotedMsg);
        const msgView       = this.viewControllers.body.getView(MciViewIds.body.message);

        let quoteLines      = quoteMsgView.getData().trim();

        if(quoteLines.length > 0) {
            if(this.replyIsAnsi) {
                const bodyMessageView = this.viewControllers.body.getView(MciViewIds.body.message);
                quoteLines += `${ansi.normal()}${bodyMessageView.getSGRFor('text')}`;
            }
            msgView.addText(`${quoteLines}\n\n`);
        }

        quoteMsgView.setText('');

        this.footerMode = 'editor';

        this.switchFooter( () => {
            this.switchFromQuoteBuilderToBody();
        });
    }

    getQuoteByHeader() {
        let quoteFormat = this.menuConfig.config.quoteFormats;

        if(Array.isArray(quoteFormat)) {
            quoteFormat =  quoteFormat[ Math.floor(Math.random() * quoteFormat.length) ];
        } else if(!_.isString(quoteFormat)) {
            quoteFormat = 'On {dateTime} {userName} said...';
        }

        const dtFormat = this.menuConfig.config.quoteDateTimeFormat || this.client.currentTheme.helpers.getDateTimeFormat();
        return stringFormat(quoteFormat, {
            dateTime    : moment(this.replyToMessage.modTimestamp).format(dtFormat),
            userName    : this.replyToMessage.fromUserName,
        });
    }

    enter() {
        if(this.messageAreaTag) {
            this.tempMessageConfAndAreaSwitch(this.messageAreaTag);
        }

        super.enter();
    }

    leave() {
        this.tempMessageConfAndAreaRestore();
        super.leave();
    }

    mciReady(mciData, cb) {
        return this.mciReadyHandler(mciData, cb);
    }
};