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

//  ENiGMA½
const { MenuModule }        = require('./menu_module.js');
const messageArea           = require('./message_area.js');
const { Errors }            = require('./enig_error.js');

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

exports.moduleInfo = {
    name    : 'Message Area List',
    desc    : 'Module for listing / choosing message areas',
    author  : 'NuSkooler',
};

//    :TODO: Obv/2 others can show # of messages in area

const MciViewIds = {
    areaList            : 1,
    areaDesc            : 2,    //  area desc updated @ index update
    customRangeStart    : 10,   //  updated @ index update
};

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

        this.initList();

        this.menuMethods = {
            changeArea : (formData, extraArgs, cb) => {
                if(1 === formData.submitId) {
                    const area = this.messageAreas[formData.value.area];

                    messageArea.changeMessageArea(this.client, area.areaTag, err => {
                        if(err) {
                            this.client.term.pipeWrite(`\n|00Cannot change area: ${err.message}\n`);
                            return this.prevMenuOnTimeout(1000, cb);
                        }

                        if(area.hasArt) {
                            const menuOpts = {
                                extraArgs : {
                                    areaTag : area.areaTag,
                                },
                                menuFlags : [ 'popParent', 'noHistory' ]
                            };

                            return this.gotoMenu(this.menuConfig.config.changeAreaPreArtMenu || 'changeMessageAreaPreArt', menuOpts, cb);
                        }

                        return this.prevMenu(cb);
                    });
                } else {
                    return cb(null);
                }
            }
        };
    }

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

            async.series(
                [
                    (next) => {
                        return this.prepViewController('areaList', 0, mciData.menu, next);
                    },
                    (next) => {
                        const areaListView = this.viewControllers.areaList.getView(MciViewIds.areaList);
                        if(!areaListView) {
                            return cb(Errors.MissingMci(`Missing area list MCI ${MciViewIds.areaList}`));
                        }

                        areaListView.on('index update', idx => {
                            this.selectionIndexUpdate(idx);
                        });

                        areaListView.setItems(this.messageAreas);
                        areaListView.redraw();
                        this.selectionIndexUpdate(0);
                        return next(null);
                    }
                ],
                err => {
                    if(err) {
                        this.client.log.error( { error : err.message }, 'Failed loading message area list');
                    }
                    return cb(err);
                }
            );
        });
    }

    selectionIndexUpdate(idx) {
        const area = this.messageAreas[idx];
        if(!area) {
            return;
        }
        this.setViewText('areaList', MciViewIds.areaDesc, area.desc);
        this.updateCustomViewTextsWithFilter('areaList', MciViewIds.customRangeStart, area);
    }

    initList() {
        let index = 1;
        this.messageAreas = messageArea.getSortedAvailMessageAreasByConfTag(
            this.client.user.properties.message_conf_tag,
            { client : this.client }
        ).map(area => {
            return {
                index       : index++,
                areaTag     : area.area.areaTag,
                name        : area.area.name,
                text        : area.area.name,  //  standard
                desc        : area.area.desc,
                hasArt      : _.isString(area.area.art),
            };
        });
    }
};