var Reflux          = require('reflux');
var FeatureActions  = require('./FeatureToggleActions');
var filter          = require('lodash/collection/filter');
var sortBy          = require('lodash/collection/sortBy');
var findIndex       = require('lodash/array/findIndex');

var _featureToggles = [];

var FeatureStore = Reflux.createStore({

  // Initial setup
    init: function() {
        this.listenTo(FeatureActions.init.completed,    this.setToggles);
        this.listenTo(FeatureActions.create.completed,  this.onCreate);
        this.listenTo(FeatureActions.update.completed,  this.onUpdate);
        this.listenTo(FeatureActions.archive.completed, this.onArchive);
        this.listenTo(FeatureActions.revive.completed,  this.onRevive);
    },

    onCreate: function(feature) {
        this.setToggles([feature].concat(_featureToggles));
    },

    setToggles: function(toggles) {
        _featureToggles = sortBy(toggles, 'name');
        this.trigger();
    },

    onUpdate: function(feature) {
        var idx = findIndex(_featureToggles, 'name', feature.name);
        _featureToggles[idx] = feature;
        this.trigger();
    },

    onArchive: function(feature) {
        var featureToggles = filter(_featureToggles, function(item) {
            return item.name !== feature.name;
        });
        this.setToggles(featureToggles);
        this.trigger();
    },

    onRevive: function(item) {
        this.setToggles(_featureToggles.concat([item]));
        this.trigger();
    },

    getFeatureToggles: function() {
        return _featureToggles;
    },

    initStore: function(toggles) {
        _featureToggles = toggles;
    }
});

module.exports = FeatureStore;