(function () {
    "use strict";

    angular
        .module('shared')
        .controller('storylineLessonAssignModal', storylineLessonAssignModal);

    storylineLessonAssignModal.$inject = ['close', '$scope', 'windowService', 'SiteHelper', 'studentList', 'resources', 'lessonId', 'storylineLesson', 'storylineLessonServer', 'AuthGo', 'messageHandler', 'MessageBox'];

    function storylineLessonAssignModal(close, $scope, windowService, SiteHelper, studentList, resources, lessonId, storylineLesson, storylineLessonServer, AuthGo, messageHandler, MessageBox) {
        var ctrl = this;
        var maxResourceLimit = 100;
        ctrl.close = ctrl.cancel = function() {
            studentList.clearSelected();
            close();
        };
        ctrl.resources = resources;
        ctrl.lessonId = lessonId;
        ctrl.activities = angular.copy(storylineLesson.getActivitiesForCurrentStorylineLessons());
        ctrl.resources = angular.copy(storylineLesson.getAssignableResources());
        ctrl.chosenLevel = getReadingLevels().length ? getReadingLevels()[0] : null;
        updateActivities();
        ctrl.hasShowableActivities = hasSelectableActivities();
        ctrl.kidsRosterUrl = AuthGo.getUrl('kaz', '/main/students');

        ctrl.isActivitySelectable = isActivitySelectable;
        ctrl.isShowableActivity = isShowableActivity;
        ctrl.hasSelectableActivities = hasSelectableActivities;
        ctrl.determineStepNumber = determineStepNumber;
        ctrl.switchAnyStudents = switchAnyStudents;
        ctrl.updateActivities = updateActivities;
        ctrl.isQuizSelected = isQuizSelected;
        ctrl.getReadingLevel = getReadingLevel;
        ctrl.getReadingLevels = getReadingLevels;
        ctrl.getStudentStep = getStudentStep;
        ctrl.isValid = isValid;
        ctrl.submit = submit;

        function isActivitySelectable(activityName) {
            if(activityName !== 'read' && activityName !== 'listen' && activityName !== 'quiz') {
                return false;
            }
            var selectedMaterials = getSelectedMaterials();
            return storylineLesson.getActivitiesForResources(selectedMaterials).includes(activityName);
        }

        function isShowableActivity(activityName) {
            return (activityName === 'read') || (activityName === 'listen') || (activityName === 'quiz');
        }

        function hasSelectableActivities() {
            var hasShowableActivity = false;
            for (var i = 0; i < ctrl.activities.length; i++) {
                if (isShowableActivity(ctrl.activities[i].name)) {
                    hasShowableActivity = true;
                    break;
                }
            }
            return hasShowableActivity;
        }

        function determineStepNumber(defaultNum) {
            if (!ctrl.hasShowableActivities) {
                return defaultNum - 1;
            }
            return defaultNum;
        }

        function switchAnyStudents() {
            if (studentList.pending) {
                return "pending";
            }
            return studentList.get().length ? "some" : "none";
        }

        function updateActivities() {
            _.each(ctrl.activities, function(activity) {
                if(isActivitySelectable(activity.name) && !activity.selectable) {
                    activity.selected = true;
                    activity.selectable = true;
                }
                else if(!isActivitySelectable(activity.name)) {
                    activity.selected = storylineLesson.getActivitiesForResources(getSelectedMaterials()).includes(activity.name);
                    activity.selectable = false;
                }
            });
        }

        function getSelectedMaterials() {
            var resourceCopy = angular.copy(ctrl.resources);
            return _.reduce(resourceCopy, function(memo, resource) {
                if(resource.selected) {
                    memo.push(resource.material);
                }
                return memo;
            }, []);
        }

        function isQuizSelected() {
            return getSelectedActivities().includes(3);
        }

        function getReadingLevel(resource) {
            if(resource.landing_page_material_id || resource.investigation_pack_material_id ||
                resource.material.typeId === null || resource.material.readingLevel === 'none') {
                return '';
            }
            else {
                return resource.material.readingLevel.charAt(0).toUpperCase() + resource.material.readingLevel.slice(1);
            }
        }

        function getReadingLevels() {
            return storylineLesson.getReadingLevels();
        }

        function getStudentStep() {
            return getReadingLevels().length > 1 ? determineStepNumber(4) : determineStepNumber(3);
        }

        function isValid() {
            //check activities, check resources, check levels if needed, check students
            return validStudents() && validActivities() && validMaterials();
        }

        function validStudents() {
            return studentList.getSelected().length ;
        }

        function validActivities() {
            var validQuizSelection = true;
            if(getSelectedActivities().includes(3)) {
                validQuizSelection = getSelectedActivities().includes(1) || getSelectedActivities().includes(2);
            }
            return getSelectedActivities().length !== 0 && validQuizSelection;
        }

        function getSelectedActivities() {
            var activityCopy = angular.copy(ctrl.activities);
            return _.reduce(activityCopy, function(memo, activity) {
                if(activity.selected) memo.push(activity.id);
                return memo;
            }, []);
        }

        function validMaterials() {
            return getFinalMaterialIds()['count'];
        }

        function getFinalMaterialIds() {
            var resourceCopy = angular.copy(ctrl.resources);
            var resourceGroups = {
                'investigation_pack_unit_ids': [],
                'sibling_material_ids': [],
                'material_ids': [],
                'count': 0
            };
            _.each(resourceCopy, function(resource) {
                if(resource.selected) {
                    if(resource.investigation_pack_material_id) resourceGroups.investigation_pack_unit_ids.push(resource.material.unitId);
                    else if(resource.landing_page_material_id) resourceGroups.sibling_material_ids.push(resource.landing_page_material_id);
                    else if(resource.material_id) resourceGroups.material_ids.push(resource.material_id);
                    resourceGroups.count++;
                }
            });
            return resourceGroups;
        }
        
        function getSelectedStudents() {
            return studentList.getSelected().map(function (student) {
                return _.pick(student, 'student_id')['student_id']
            });
        }
        
        function getFormData() {
            var data = getFinalMaterialIds();
            data['activity_types'] = getSelectedActivities();
            data['level'] = ctrl.chosenLevel;
            data['student_ids'] = getSelectedStudents();
            data['storyline_id'] = ctrl.resources[0]['storyline_id'];
            data['lesson_id'] = ctrl.lessonId;
            data['constructed_response_enabled'] = ctrl.constructedResponseEnabled;
            return data;
        }

        function assignmentRedirect() {
            windowService.redirect(AuthGo.getUrl(SiteHelper.KAZ_SITE_ABBREVIATION, '/main/Assign/action/readingPractice#!/tabs/science'));
        }

        function submit() {
            if(!isValid()) {
                messageHandler.publishError("Invalid selection. Please change selections and try again.");
                return;
            }
            var limitLookup = null;
            var studentIDsAsDelimitedString = "";
            for (var i = 0; i < studentList.getSelected().length; i++) {
                var studentId = studentList.getSelected()[i].student_id;
                studentIDsAsDelimitedString = studentIDsAsDelimitedString + studentId + ",";
            }
            if (studentIDsAsDelimitedString.length < 1) {
                studentIDsAsDelimitedString = 0;
            } else {
                studentIDsAsDelimitedString = studentIDsAsDelimitedString.slice(0, -1);
            }

            storylineLessonServer.getStudentResourceLimit(studentIDsAsDelimitedString).then(function (response) {
                limitLookup = JSON.parse(response.data);
            });

            storylineLessonServer.putStorylineLessonAssignment(getFormData())
                .then(function() {
                    messageHandler.publishSuccess('Assignment created. Track progress on the ', 'assignments page.', assignmentRedirect);
                    ctrl.close();
                })
                .catch(function(error) {
                    var errorMessage = error.data.message;
                    if (errorMessage.includes('limit')) {
                        errorMessage = "The following students have exceeded their resource limit: ";
                        for (var i = 0; i < studentList.getSelected().length; ++i) {
                            var currentStudentId = studentList.getSelected()[i].student_id;
                            if (limitLookup[currentStudentId] >= maxResourceLimit) {
                                var student = studentList.getSelected()[i];
                                errorMessage = errorMessage + student.student_name + ", ";
                            }
                        }
                        errorMessage = errorMessage.slice(0, -2);

                        MessageBox.show({
                            message: errorMessage,
                            responses: [
                                {
                                    id: 'ok',
                                    confirm: true,
                                    label: 'OK'
                                }
                            ]
                        }).then(function (response) {
                            ctrl.messageBoxOpen = false;
                        },function (reason) {
                            alert(errorMessage);
                        });
                    } else {
                        messageHandler.publishError('There was a problem processing your request.');
                    }
                });
        }

        ctrl.lessonTitle = function() {
            return ctrl.lessonId > 0 ? 'Lesson ' + ctrl.lessonId : 'End of Storyline';
        };


    }
})();