let $injector = widgetContext.$scope.$injector;
let customDialog = $injector.get(widgetContext.servicesMap.get('customDialog'));
let entityService = $injector.get(widgetContext.servicesMap.get('entityService'));
let assetService = $injector.get(widgetContext.servicesMap.get('assetService'));
let deviceService = $injector.get(widgetContext.servicesMap.get('deviceService'));
let attributeService = $injector.get(widgetContext.servicesMap.get('attributeService'));
let entityRelationService = $injector.get(widgetContext.servicesMap.get('entityRelationService'));

openEditEntityDialog();

function openEditEntityDialog() {
    customDialog.customDialog(htmlTemplate, EditEntityDialogController).subscribe();
}

function EditEntityDialogController(instance) {
    let vm = instance;

    vm.entityName = entityName;
    vm.entityType = entityId.entityType;
    vm.entitySearchDirection = {
        from: "FROM",
        to: "TO"
    };
    vm.attributes = {};
    vm.oldRelationsData = [];
    vm.relationsToDelete = [];
    vm.entity = {};

    vm.editEntityFormGroup = vm.fb.group({
        entityName: ['', [vm.validators.required]],
        entityType: [null],
        entityLabel: [null],
        type: ['', [vm.validators.required]],
        attributes: vm.fb.group({
            latitude: [null],
            longitude: [null],
            address: [null],
            owner: [null],
            number: [null, [vm.validators.pattern(/^-?[0-9]+$/)]],
            booleanValue: [false]
        }),
        oldRelations: vm.fb.array([]),
        relations: vm.fb.array([])
    });

    getEntityInfo();

    vm.cancel = function() {
        vm.dialogRef.close(null);
    };

    vm.relations = function() {
        return vm.editEntityFormGroup.get('relations');
    };

    vm.oldRelations = function() {
        return vm.editEntityFormGroup.get('oldRelations');
    };

    vm.addRelation = function() {
        vm.relations().push(vm.fb.group({
            relatedEntity: [null, [vm.validators.required]],
            relationType: [null, [vm.validators.required]],
            direction: [null, [vm.validators.required]]
        }));
    };

    function addOldRelation() {
        vm.oldRelations().push(vm.fb.group({
            relatedEntity: [{value: null, disabled: true}, [vm.validators.required]],
            relationType: [{value: null, disabled: true}, [vm.validators.required]],
            direction: [{value: null, disabled: true}, [vm.validators.required]]
        }));
    }

    vm.removeRelation = function(index) {
        vm.relations().removeAt(index);
        vm.relations().markAsDirty();
    };

    vm.removeOldRelation = function(index) {
        vm.oldRelations().removeAt(index);
        vm.relationsToDelete.push(vm.oldRelationsData[index]);
        vm.oldRelations().markAsDirty();
    };

    vm.save = function() {
        vm.editEntityFormGroup.markAsPristine();
        widgetContext.rxjs.forkJoin([
            saveAttributes(entityId),
            saveRelations(entityId),
            saveEntity()
        ]).subscribe(
            function () {
                widgetContext.updateAliases();
                vm.dialogRef.close(null);
            }
        );
    };

    function getEntityAttributes(attributes) {
        for (var i = 0; i < attributes.length; i++) {
            vm.attributes[attributes[i].key] = attributes[i].value;
        }
    }

    function getEntityRelations(relations) {
        let relationsFrom = relations[0];
        let relationsTo = relations[1];
        for (let i=0; i < relationsFrom.length; i++) {
            let relation = {
                direction: 'FROM',
                relationType: relationsFrom[i].type,
                relatedEntity: relationsFrom[i].to
            };
            vm.oldRelationsData.push(relation);
            addOldRelation();
        }
        for (let i=0; i < relationsTo.length; i++) {
            let relation = {
                direction: 'TO',
                relationType: relationsTo[i].type,
                relatedEntity: relationsTo[i].from
            };
            vm.oldRelationsData.push(relation);
            addOldRelation();
        }
    }

    function getEntityInfo() {
         widgetContext.rxjs.forkJoin([
             entityRelationService.findInfoByFrom(entityId),
             entityRelationService.findInfoByTo(entityId),
             attributeService.getEntityAttributes(entityId, 'SERVER_SCOPE'),
             entityService.getEntity(entityId.entityType, entityId.id)
         ]).subscribe(
             function (data) {
                 getEntityRelations(data.slice(0,2));
                 getEntityAttributes(data[2]);
                 vm.entity = data[3];
                 vm.editEntityFormGroup.patchValue({
                     entityName: vm.entity.name,
                     entityType: vm.entityType,
                     entityLabel: vm.entity.label,
                     type: vm.entity.type,
                     attributes: vm.attributes,
                     oldRelations: vm.oldRelationsData
                 }, {emitEvent: false});
             }
         );
     }

    function saveEntity() {
        const formValues = vm.editEntityFormGroup.value;
        if (vm.entity.label !== formValues.entityLabel){
            vm.entity.label = formValues.entityLabel;
            if (formValues.entityType == 'ASSET') {
                return assetService.saveAsset(vm.entity);
            } else if (formValues.entityType == 'DEVICE') {
                return deviceService.saveDevice(vm.entity);
            }
        }
        return widgetContext.rxjs.of([]);
    }

    function saveAttributes(entityId) {
        let attributes = vm.editEntityFormGroup.get('attributes').value;
        let attributesArray = [];
        for (let key in attributes) {
            if (attributes[key] !== vm.attributes[key]) {
                attributesArray.push({key: key, value: attributes[key]});
            }
        }
        if (attributesArray.length > 0) {
            return attributeService.saveEntityAttributes(entityId, "SERVER_SCOPE", attributesArray);
        }
        return widgetContext.rxjs.of([]);
    }

    function saveRelations(entityId) {
        let relations = vm.editEntityFormGroup.get('relations').value;
        let tasks = [];
        for(let i=0; i < relations.length; i++) {
            let relation = {
                type: relations[i].relationType,
                typeGroup: 'COMMON'
            };
            if (relations[i].direction == 'FROM') {
                relation.to = relations[i].relatedEntity;
                relation.from = entityId;
            } else {
                relation.to = entityId;
                relation.from = relations[i].relatedEntity;
            }
            tasks.push(entityRelationService.saveRelation(relation));
        }
        for (let i=0; i < vm.relationsToDelete.length; i++) {
            let relation = {
                type: vm.relationsToDelete[i].relationType
            };
            if (vm.relationsToDelete[i].direction == 'FROM') {
                relation.to = vm.relationsToDelete[i].relatedEntity;
                relation.from = entityId;
            } else {
                relation.to = entityId;
                relation.from = vm.relationsToDelete[i].relatedEntity;
            }
            tasks.push(entityRelationService.deleteRelation(relation.from, relation.type, relation.to));
        }
        if (tasks.length > 0) {
            return widgetContext.rxjs.forkJoin(tasks);
        }
        return widgetContext.rxjs.of([]);
    }
}