(function(){
    "use strict";
    angular.module('shared')
        .component('classroomList', {
            templateUrl: '/shared/js/angular/classroom-list/classroom-list.html',
            controller: 'ClassroomList'
        })
        .controller('ClassroomList', ['studentList', 'memberInfo', 'ChunkStudents', '$scope', 'StudentsUtil', '$parse',
            'classroomInfo', 'FeatureCheck', 'AuthGo', 'SiteHelper', 'SITE_ID',
            function (studentList, memberInfo, ChunkStudents, $scope, StudentsUtil, $parse, classroomInfo, FeatureCheck,
                      AuthGo, SiteHelper, SITE_ID) {
                var ctrl = angular.extend(this, {
                    students: studentList,
                    memberInfo: memberInfo,
                    hasSharedStudents: StudentsUtil.getShared(studentList.get()).length > 0,
                    classrooms: classroomInfo.activeClassrooms,
                    hasMultipleClassrooms: classroomInfo.activeClassrooms &&
                        Object.keys(classroomInfo.activeClassrooms).length > 1 &&
                        FeatureCheck.isFeatureEnabled('MULTIPLE_CLASSROOMS_MODEL'),
                    isKaz: parseInt(SITE_ID) === SiteHelper.KAZ_SITE_ID,
                    isVaz: parseInt(SITE_ID) === SiteHelper.VAZ_SITE_ID,
                    isMainNavRedesignEnabled: isMainNavRedesignEnabled(),
                    isManageStudentsRedesignEnabled: FeatureCheck.isFeatureEnabled('MANAGE_STUDENTS_REDESIGN'),
                    $postLink: postLink,
                    isHomeroom: isHomeroom,
                    filterByClassroom: filterByClassroom,
                    filterByShared: filterByShared,
                    showAllStudents: showAllStudents,
                    toggleShowShared: toggleShowShared,
                    getKazUrl: getKazUrl
                });
                var SHOW_SHARED_SESSION_KEY = 'ClassroomList::showShared';
                var SELECTED_CLASSROOM_SESSION_KEY = 'ClassroomList::selectedClassroom';
                var SELECTED_SHARED_SESSION_KEY = 'ClassroomList::selectedShared';
                var getStudents = $parse('$ctrl.students.get() | sortByStudentName: $ctrl.memberInfo.sort_by_last_name');
                return ctrl;

                function isMainNavRedesignEnabled() {
                    return parseInt(SITE_ID) === SiteHelper.KAZ_SITE_ID ?
                        FeatureCheck.isFeatureEnabled('ANGULARJS_KAZ_MAIN_NAV') : true;
                }

                function toggleShowShared() {
                    updateChunkedStudents(getStudents($scope));
                    localStorage.setItem(SHOW_SHARED_SESSION_KEY, ctrl.showShared);
                }
                function filterByClassroom(classroom) {
                    localStorage.setItem(SELECTED_CLASSROOM_SESSION_KEY, ctrl.selectedClassroomId = classroom.classroom_id);
                    localStorage.setItem(SELECTED_SHARED_SESSION_KEY, ctrl.selectedShared = false);
                    updateChunkedStudents(getStudents($scope));
                }
                function filterByShared() {
                    localStorage.setItem(SELECTED_CLASSROOM_SESSION_KEY, ctrl.selectedClassroomId = 0);
                    localStorage.setItem(SELECTED_SHARED_SESSION_KEY, ctrl.selectedShared = true);
                    updateChunkedStudents(getStudents($scope));
                }
                function showAllStudents() {
                    localStorage.setItem(SELECTED_CLASSROOM_SESSION_KEY, ctrl.selectedClassroomId = 0);
                    localStorage.setItem(SELECTED_SHARED_SESSION_KEY, ctrl.selectedShared = false);
                    updateChunkedStudents(getStudents($scope));
                }
                function getKazUrl(url) {
                    return ctrl.isKaz ? url : AuthGo.getUrl('kaz', url);
                }
                function isHomeroom(student) {
                    return !student.is_shared;
                }
                function postLink() {
                    $scope.$watchCollection(
                        getStudents,
                        updateChunkedStudents);
                    ctrl.pending = true;
                    ctrl.selectedShared = false;
                    studentList.get().$promise.finally(function () {
                        ctrl.showShared = getShowShared();
                        if (ctrl.hasMultipleClassrooms) {
                            if (ctrl.isManageStudentsRedesignEnabled) {
                                ctrl.selectedClassroomId = getSelectedClassroom();
                                ctrl.selectedShared = getSelectedShared();
                            }
                        }
                        updateChunkedStudents(getStudents($scope));
                        ctrl.pending = false;
                    })
                }
                function updateChunkedStudents (students) {
                    ctrl.chunkedStudents = ChunkStudents.chunk(students.filter(function (student) {
                        if (ctrl.hasMultipleClassrooms) {
                            if (ctrl.selectedClassroomId > 0) {
                                return student.classroom_id == ctrl.selectedClassroomId;
                            } else if (ctrl.selectedShared) {
                                return student.is_shared;
                            } else if (ctrl.isManageStudentsRedesignEnabled && !ctrl.selectedShared) {
                                return true;
                            }
                        } else {
                            return ctrl.showShared
                                ? true
                                : !student.is_shared;
                        }
                    }));
                    ctrl.numCols = ctrl.chunkedStudents.length;
                    ctrl.hasSharedStudents = (StudentsUtil.getShared(studentList.get()).length > 0);
                }
                function getShowShared() {
                    var result;
                    if (localStorage.getItem(SHOW_SHARED_SESSION_KEY) === null) {
                        result = StudentsUtil.getHomeroom(ctrl.students.get()).length === 0;
                    } else {
                        result = localStorage.getItem(SHOW_SHARED_SESSION_KEY) === "true";
                    }
                    return result;
                }
                function getSelectedClassroom() {
                    var result = localStorage.getItem(SELECTED_CLASSROOM_SESSION_KEY);
                    var classroomId = result === null ? 0 : parseInt(result);
                    return classroomInfo.activeClassrooms.hasOwnProperty(classroomId) ? classroomId : 0;
                }
                function getSelectedShared() {
                    return localStorage.getItem(SELECTED_SHARED_SESSION_KEY) === 'true';
                }
            }]);
})();