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

//  enigma-bbs
const MenuModule                        = require('./menu_module.js').MenuModule;
const { getSortedAvailableFileAreas }   = require('./file_base_area.js');
const StatLog                           = require('./stat_log.js');
const SysProps                          = require('./system_property.js');

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

exports.moduleInfo = {
    name    : 'File Area Selector',
    desc    : 'Select from available file areas',
    author  : 'NuSkooler',
};

const MciViewIds = {
    areaList    : 1,
};

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

        this.menuMethods = {
            selectArea : (formData, extraArgs, cb) => {
                const filterCriteria = {
                    areaTag     : formData.value.areaTag,
                };

                const menuOpts = {
                    extraArgs   : {
                        filterCriteria  : filterCriteria,
                    },
                    menuFlags   : [ 'popParent', 'mergeFlags' ],
                };

                return this.gotoMenu(this.menuConfig.config.fileBaseListEntriesMenu || 'fileBaseListEntries', menuOpts, cb);
            }
        };
    }

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

            const self = this;

            async.waterfall(
                [
                    function mergeAreaStats(callback) {
                        const areaStats = StatLog.getSystemStat(SysProps.FileBaseAreaStats) || { areas : {} };

                        //  we could use 'sort' alone, but area/conf sorting has some special properties; user can still override
                        const availAreas = getSortedAvailableFileAreas(self.client);
                        availAreas.forEach(area => {
                            const stats = areaStats.areas[area.areaTag];
                            area.totalFiles = stats ? stats.files : 0;
                            area.totalBytes = stats ? stats.bytes : 0;
                        });

                        return callback(null, availAreas);
                    },
                    function prepView(availAreas, callback) {
                        self.prepViewController('allViews', 0, mciData.menu, (err, vc) => {
                            if(err) {
                                return callback(err);
                            }

                            const areaListView = vc.getView(MciViewIds.areaList);
                            areaListView.setItems(availAreas.map(area => Object.assign(area, { text : area.name, data : area.areaTag } )));
                            areaListView.redraw();

                            return callback(null);
                        });
                    }
                ],
                err => {
                    return cb(err);
                }
            );
        });
    }
};