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

//  ENiGMA½
const MenuModule            = require('./menu_module.js').MenuModule;
const ViewController        = require('./view_controller.js').ViewController;
const theme                 = require('./theme.js');
const resetScreen           = require('./ansi_term.js').resetScreen;
const StatLog               = require('./stat_log.js');
const renderStringLength    = require('./string_util.js').renderStringLength;
const SystemLogKeys         = require('./system_log.js');

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

exports.moduleInfo = {
    name        : 'Rumorz',
    desc        : 'Standard local rumorz',
    author      : 'NuSkooler',
    packageName : 'codes.l33t.enigma.rumorz',
};

const FormIds = {
    View    : 0,
    Add     : 1,
};

const MciCodeIds = {
    ViewForm    :  {
        Entries     : 1,
        AddPrompt   : 2,
    },
    AddForm : {
        NewEntry        : 1,
        EntryPreview    : 2,
        AddPrompt       : 3,
    }
};

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

        this.menuMethods =  {
            viewAddScreen : (formData, extraArgs, cb) => {
                return this.displayAddScreen(cb);
            },

            addEntry : (formData, extraArgs, cb) => {
                if(_.isString(formData.value.rumor) && renderStringLength(formData.value.rumor) > 0) {
                    const rumor = formData.value.rumor.trim();  //  remove any trailing ws

                    StatLog.appendSystemLogEntry(
                        SystemLogKeys.UserAddedRumorz,
                        rumor,
                        StatLog.KeepDays.Forever,
                        StatLog.KeepType.Forever,
                        () => {
                            this.clearAddForm();
                            return this.displayViewScreen(true, cb);    //  true=cls
                        }
                    );
                } else {
                    //  empty message - treat as if cancel was hit
                    return this.displayViewScreen(true, cb);    //  true=cls
                }
            },

            cancelAdd : (formData, extraArgs, cb) => {
                this.clearAddForm();
                return this.displayViewScreen(true, cb);    //  true=cls
            }
        };
    }

    get config() { return this.menuConfig.config; }

    clearAddForm() {
        const newEntryView  = this.viewControllers.add.getView(MciCodeIds.AddForm.NewEntry);
        const previewView   = this.viewControllers.add.getView(MciCodeIds.AddForm.EntryPreview);

        newEntryView.setText('');

        //  preview is optional
        if(previewView) {
            previewView.setText('');
        }
    }

    initSequence() {
        const self = this;

        async.series(
            [
                function beforeDisplayArt(callback) {
                    self.beforeArt(callback);
                },
                function display(callback) {
                    self.displayViewScreen(false, callback);
                }
            ],
            err => {
                if(err) {
                    //  :TODO: Handle me -- initSequence() should really take a completion callback
                }
                self.finishedLoading();
            }
        );
    }

    displayViewScreen(clearScreen, cb) {
        const self = this;
        async.waterfall(
            [
                function clearAndDisplayArt(callback) {
                    if(self.viewControllers.add) {
                        self.viewControllers.add.setFocus(false);
                    }

                    if(clearScreen) {
                        self.client.term.rawWrite(resetScreen());
                    }

                    theme.displayThemedAsset(
                        self.config.art.entries,
                        self.client,
                        { font : self.menuConfig.font, trailingLF : false },
                        (err, artData) => {
                            return callback(err, artData);
                        }
                    );
                },
                function initOrRedrawViewController(artData, callback) {
                    if(_.isUndefined(self.viewControllers.add)) {
                        const vc = self.addViewController(
                            'view',
                            new ViewController( { client : self.client, formId : FormIds.View } )
                        );

                        const loadOpts = {
                            callingMenu     : self,
                            mciMap          : artData.mciMap,
                            formId          : FormIds.View,
                        };

                        return vc.loadFromMenuConfig(loadOpts, callback);
                    } else {
                        self.viewControllers.view.setFocus(true);
                        self.viewControllers.view.getView(MciCodeIds.ViewForm.AddPrompt).redraw();
                        return callback(null);
                    }
                },
                function fetchEntries(callback) {
                    const entriesView = self.viewControllers.view.getView(MciCodeIds.ViewForm.Entries);

                    StatLog.getSystemLogEntries(SystemLogKeys.UserAddedRumorz, StatLog.Order.Timestamp, (err, entries) => {
                        return callback(err, entriesView, entries);
                    });
                },
                function populateEntries(entriesView, entries, callback) {
                    entriesView.setItems(entries.map(e => {
                        return {
                            text    : e.log_value,  //  standard
                            rumor   : e.log_value,
                        };
                    }));

                    entriesView.redraw();

                    return callback(null);
                },
                function finalPrep(callback) {
                    const promptView = self.viewControllers.view.getView(MciCodeIds.ViewForm.AddPrompt);
                    promptView.setFocusItemIndex(1);    //  default to NO
                    return callback(null);
                }
            ],
            err => {
                if(cb) {
                    return cb(err);
                }
            }
        );
    }

    displayAddScreen(cb) {
        const self = this;

        async.waterfall(
            [
                function clearAndDisplayArt(callback) {
                    self.viewControllers.view.setFocus(false);
                    self.client.term.rawWrite(resetScreen());

                    theme.displayThemedAsset(
                        self.config.art.add,
                        self.client,
                        { font : self.menuConfig.font },
                        (err, artData) => {
                            return callback(err, artData);
                        }
                    );
                },
                function initOrRedrawViewController(artData, callback) {
                    if(_.isUndefined(self.viewControllers.add)) {
                        const vc = self.addViewController(
                            'add',
                            new ViewController( { client : self.client, formId : FormIds.Add } )
                        );

                        const loadOpts = {
                            callingMenu     : self,
                            mciMap          : artData.mciMap,
                            formId          : FormIds.Add,
                        };

                        return vc.loadFromMenuConfig(loadOpts, callback);
                    } else {
                        self.viewControllers.add.setFocus(true);
                        self.viewControllers.add.redrawAll();
                        self.viewControllers.add.switchFocus(MciCodeIds.AddForm.NewEntry);
                        return callback(null);
                    }
                },
                function initPreviewUpdates(callback) {
                    const previewView   = self.viewControllers.add.getView(MciCodeIds.AddForm.EntryPreview);
                    const entryView     = self.viewControllers.add.getView(MciCodeIds.AddForm.NewEntry);
                    if(previewView) {
                        let timerId;
                        entryView.on('key press', () => {
                            clearTimeout(timerId);
                            timerId = setTimeout( () => {
                                const focused = self.viewControllers.add.getFocusedView();
                                if(focused === entryView) {
                                    previewView.setText(entryView.getData());
                                    focused.setFocus(true);
                                }
                            }, 500);
                        });
                    }
                    return callback(null);
                }
            ],
            err => {
                if(cb) {
                    return cb(err);
                }
            }
        );
    }
};