(function() {
    "use strict";

    angular.module('shared')

        .component('readingLevels', {
            templateUrl: '/shared/js/angular/book-grid/reading-levels.html',
            controller: 'readingLevelsController'
        })
        .controller('readingLevelsController',
            ['messageHandler','ResourceList','_','languageConstants','resourceFilter','FeatureCheck',
                function readingLevelsController(messageHandler,ResourceList,_,languageConstants,resourceFilter,FeatureCheck) {
                    var ctrl = this;

                    ctrl.getLevelBarLevels = function() {
                        return ResourceList.getLevelBarLevels();
                    };

                    ctrl.displayLevelAsActive = function(readingLevel) {
                        return !anyActiveLevels() || isActiveLevel(readingLevel);
                    }

                    ctrl.toggleLevelPopout = function(readingLevel) {
                        readingLevel.showPopout = !readingLevel.showPopout;
                    };

                    ctrl.getTop = function() {
                        if (ctrl.isSpanish()) {
                            return ctrl.showLexile() ? -120 : -100;
                        }
                        return -220;
                    };

                    ctrl.isSpanish = function() {
                        return ResourceList.getLanguageId() === languageConstants.SPANISH_LANGUAGE_ID;
                    };

                    ctrl.showLexile = function() {
                        return !ctrl.isSpanish() || FeatureCheck.isFeatureEnabled('SPANISH_LEVEL_CORRELATION_CHART');
                    };

                    ctrl.clickedLevel = function(readingLevel) {
                        var newActiveLevelList = null;
                        if (isActiveLevel(readingLevel)) { // clicked level off
                            newActiveLevelList = _.filter(ResourceList.getReadingLevels(),function(level) {
                                return readingLevel['level'] !== level['level'];
                            });
                        } else {  // clicked level on
                            newActiveLevelList = ResourceList.getReadingLevels() == null ? [] : ResourceList.getReadingLevels();
                            newActiveLevelList.push(readingLevel);
                        }
                        resourceFilter.setReadingLevels(newActiveLevelList);
                    };

                    function isActiveLevel(readingLevel) {
                        var foundLevel = undefined;
                        if (ResourceList.getReadingLevels() != null)
                        {
                            foundLevel = _.find(ResourceList.getReadingLevels(), function (level) {
                                return level['level'] === readingLevel['level'];
                            });
                        }
                        return foundLevel !== undefined;
                    }

                    function anyActiveLevels() {
                        var oneSelectedLevel = _.find(ctrl.getLevelBarLevels(), function(readingLevel) {
                            return isActiveLevel(readingLevel);
                        });
                        return oneSelectedLevel !== undefined;
                    }
                }]);
}());