/*-
 * ============LICENSE_START=======================================================
 * SDC
 * ================================================================================
 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
 * ================================================================================
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============LICENSE_END=========================================================
 */

import * as _ from "lodash";
import { Component, NodesFactory, ComponentInstance, CompositionCiNodeVl, IAppMenu, AssetPopoverObj, Service } from "app/models";
import { EventListenerService, LoaderService } from "app/services";
import { GRAPH_EVENTS, ModalsHandler, GraphUIObjects } from "app/utils";
import { CompositionGraphGeneralUtils } from "./composition-graph-general-utils";
import { CommonGraphUtils } from "../../common/common-graph-utils";
import { CompositionCiServicePathLink } from "app/models/graph/graph-links/composition-graph-links/composition-ci-service-path-link";
import { ServiceGenericResponse } from "app/ng2/services/responses/service-generic-response";
import { ServiceServiceNg2 } from 'app/ng2/services/component-services/service.service';
/**
 * Created by obarda on 11/9/2016.
 */
export class CompositionGraphNodesUtils {
    constructor(private NodesFactory: NodesFactory, private $log: ng.ILogService,
        private GeneralGraphUtils: CompositionGraphGeneralUtils,
        private commonGraphUtils: CommonGraphUtils,
        private eventListenerService: EventListenerService,
        private loaderService: LoaderService,
        private serviceService: ServiceServiceNg2) {

    }

    /**
     * Returns component instances for all nodes passed in
     * @param nodes - Cy nodes
     * @returns {any[]}
     */
    public getAllNodesData(nodes: Cy.CollectionNodes) {
        return _.map(nodes, (node: Cy.CollectionFirstNode) => {
            return node.data();
        })
    };


    public highlightMatchingNodesByName = (cy: Cy.Instance, nameToMatch: string) => {

        cy.batch(() => {
            cy.nodes("[name !@^= '" + nameToMatch + "']").style({ 'background-image-opacity': 0.4 });
            cy.nodes("[name @^= '" + nameToMatch + "']").style({ 'background-image-opacity': 1 });
        })

    }

    //Returns all nodes whose name starts with searchTerm
    public getMatchingNodesByName = (cy: Cy.Instance, nameToMatch: string): Cy.CollectionNodes => {
        return cy.nodes("[name @^= '" + nameToMatch + "']");
    };

    /**
     * Deletes component instances on server and then removes it from the graph as well
     * @param cy
     * @param component
     * @param nodeToDelete
     */
    public deleteNode(cy: Cy.Instance, component: Component, nodeToDelete: Cy.CollectionNodes): void {

        this.loaderService.showLoader('composition-graph');
        let onSuccess: (response: ComponentInstance) => void = (response: ComponentInstance) => {
            console.info('onSuccess', response);

            //if node to delete is a UCPE, remove all children (except UCPE-CPs) and remove their "hostedOn" links
            if (nodeToDelete.data().isUcpe) {
                _.each(cy.nodes('[?isInsideGroup]'), (node) => {
                    this.eventListenerService.notifyObservers(GRAPH_EVENTS.ON_REMOVE_NODE_FROM_UCPE, node, nodeToDelete);
                });
            }

            //check whether the node is connected to any VLs that only have one other connection. If so, delete that VL as well
            if (!(nodeToDelete.data() instanceof CompositionCiNodeVl)) {
                let connectedVls: Array<Cy.CollectionFirstNode> = this.getConnectedVlToNode(nodeToDelete);
                this.handleConnectedVlsToDelete(connectedVls);
            }

            // check whether there is a service path going through this node, and if so clean it from the graph.
            let nodeId = nodeToDelete.data().id;
            let connectedPathLinks = cy.collection(`[type="${CompositionCiServicePathLink.LINK_TYPE}"][source="${nodeId}"], [type="${CompositionCiServicePathLink.LINK_TYPE}"][target="${nodeId}"]`);
            _.forEach(connectedPathLinks, (link, key) => {
                cy.remove(`[pathId="${link.data().pathId}"]`);
            });

            // update service path list
            this.serviceService.getComponentCompositionData(component).subscribe((response: ServiceGenericResponse) => {
                (<Service>component).forwardingPaths = response.forwardingPaths;
            });

            this.eventListenerService.notifyObservers(GRAPH_EVENTS.ON_DELETE_COMPONENT_INSTANCE_SUCCESS, nodeId);

            //update UI
            cy.remove(nodeToDelete);
        };

        let onFailed: (response: any) => void = (response: any) => {
            console.info('onFailed', response);
        };


        this.GeneralGraphUtils.getGraphUtilsServerUpdateQueue().addBlockingUIActionWithReleaseCallback(
            () => component.deleteComponentInstance(nodeToDelete.data().componentInstance.uniqueId).then(onSuccess, onFailed),
            () => this.loaderService.hideLoader('composition-graph')
        );

    };

    /**
     * Batch delete component instances on server and then removes them from the graph as well
     * @param cy
     * @param component
     * @param nodesToDelete
     */
    public batchDeleteNodes(cy:Cy.Instance, component:Component, nodesToDelete:Cy.CollectionNodes):Array<string> {
        let nodesToDeleteIds:Array<string> = new Array<string>();
        if(nodesToDelete && nodesToDelete.size() > 0){
            nodesToDelete.each((i:number, node:Cy.CollectionNodes) => {
                nodesToDeleteIds.push(node.data('id'));
            });
            this.loaderService.showLoader('composition-graph');
            let componentInstances:Array<ComponentInstance> = component.componentInstances;
            let onSuccess:(response:any) => void = (deleteFailedIds:any) => {
                this.removeDeletedNodesOnGraph(cy, nodesToDelete, deleteFailedIds, componentInstances);
            };

            let onFailed:(response:any) => void = (response:any) => {
                console.error('batchDeleteNodes failed error is', response);
            };

            this.GeneralGraphUtils.getGraphUtilsServerUpdateQueue().addBlockingUIActionWithReleaseCallback(
                () => component.batchDeleteComponentInstance(nodesToDeleteIds).then(onSuccess, onFailed),
                () => this.loaderService.hideLoader('composition-graph')
            );
        }

            return nodesToDeleteIds;
    };

    private deleteNodeSuccess(cy:Cy.Instance, component:Component, nodeToDelete:Cy.CollectionNodes):void{
        //if node to delete is a UCPE, remove all children (except UCPE-CPs) and remove their "hostedOn" links
        if (nodeToDelete.data().isUcpe) {
            _.each(cy.nodes('[?isInsideGroup]'), (node)=> {
                this.eventListenerService.notifyObservers(GRAPH_EVENTS.ON_REMOVE_NODE_FROM_UCPE, node, nodeToDelete);
            });
        }

        //check whether the node is connected to any VLs that only have one other connection. If so, delete that VL as well
        if (!(nodeToDelete.data() instanceof CompositionCiNodeVl)) {
            let connectedVls:Array<Cy.CollectionFirstNode> = this.getConnectedVlToNode(nodeToDelete);
            this.handleConnectedVlsToDelete(connectedVls);
        }

        // check whether there is a service path going through this node, and if so clean it from the graph.
        let nodeId = nodeToDelete.data().id;
        let connectedPathLinks = cy.collection(`[type="${CompositionCiServicePathLink.LINK_TYPE}"][source="${nodeId}"], [type="${CompositionCiServicePathLink.LINK_TYPE}"][target="${nodeId}"]`);
        _.forEach(connectedPathLinks, (link, key) => {
            cy.remove(`[pathId="${link.data().pathId}"]`);
        });

        // update service path list
        this.serviceService.getComponentCompositionData(component).subscribe((response:ServiceGenericResponse) => {
            (<Service>component).forwardingPaths = response.forwardingPaths;
        });

        this.eventListenerService.notifyObservers(GRAPH_EVENTS.ON_DELETE_COMPONENT_INSTANCE_SUCCESS, nodeId);

        //update UI
        cy.remove(nodeToDelete);
    }

    private removeDeletedNodesOnGraph(cy:Cy.Instance, nodesToDelete:Cy.CollectionNodes, deleteFailedIds:Array<string>, componentInstances:Array<ComponentInstance>):void {
        nodesToDelete.each((j:number, nodeToDelete:Cy.CollectionNodes) => {
            if(deleteFailedIds.indexOf(nodeToDelete.data('id')) < 0) {
                //if node to delete is a UCPE, remove all children (except UCPE-CPs) and remove their "hostedOn" links
                if (nodeToDelete.data().isUcpe) {
                    _.each(cy.nodes('[?isInsideGroup]'), (node)=> {
                        this.eventListenerService.notifyObservers(GRAPH_EVENTS.ON_REMOVE_NODE_FROM_UCPE, node , nodeToDelete);
                    });
                }

                //check whether the node is connected to any VLs that only have one other connection. If so, delete that VL as well
                if(!(nodeToDelete.data() instanceof CompositionCiNodeVl)) {
                    let connectedVls:Array<Cy.CollectionFirstNode> = this.getConnectedVlToNode(nodeToDelete);
                    this.handleConnectedVlsToDelete(connectedVls);
                }


                cy.remove(nodeToDelete);
            }
        });
    }
 
    /**
     * Finds all VLs connected to a single node
     * @param node
     * @returns {Array<Cy.CollectionFirstNode>}
     */
    public getConnectedVlToNode = (node: Cy.CollectionNodes): Array<Cy.CollectionFirstNode> => {
        let connectedVls: Array<Cy.CollectionFirstNode> = new Array<Cy.CollectionFirstNode>();
        _.forEach(node.connectedEdges().connectedNodes(), (node: Cy.CollectionFirstNode) => {
            if (node.data() instanceof CompositionCiNodeVl) {
                connectedVls.push(node);
            }
        });
        return connectedVls;
    };


    /**
     * Delete all VLs that have only two connected nodes (this function is called when deleting a node)
     * @param connectedVls
     */
    public handleConnectedVlsToDelete = (connectedVls: Array<Cy.CollectionFirstNode>) => {
        _.forEach(connectedVls, (vlToDelete: Cy.CollectionNodes) => {

            if (vlToDelete.connectedEdges().length === 2) { // if vl connected only to 2 nodes need to delete the vl
                this.eventListenerService.notifyObservers(GRAPH_EVENTS.ON_DELETE_COMPONENT_INSTANCE, vlToDelete.data().componentInstance);
            }
        });
    };


    /**
     * This function is called when moving a node in or out of UCPE.
     * Deletes all connected VLs that have less than 2 valid connections remaining after the move
     * Returns the collection of vls that are in the process of deletion (async) to prevent duplicate calls while deletion is in progress
     * @param component
     * @param cy
     * @param node - node that was moved in/out of ucpe
     */
    public deleteNodeVLsUponMoveToOrFromUCPE = (component: Component, cy: Cy.Instance, node: Cy.CollectionNodes): Cy.CollectionNodes => {
        if (node.data() instanceof CompositionCiNodeVl) {
            return;
        }

        let connectedVLsToDelete: Cy.CollectionNodes = cy.collection();
        _.forEach(node.neighborhood('node'), (connectedNode) => {

            //Find all neighboring nodes that are VLs
            if (connectedNode.data() instanceof CompositionCiNodeVl) {

                //check VL's neighbors to see if it has 2 or more nodes whose location is compatible with VL (regardless of whether VL is in or out of UCPE)
                let compatibleNodeCount = 0;
                let vlNeighborhood = connectedNode.neighborhood('node');
                _.forEach(vlNeighborhood, (vlNeighborNode) => {
                    if (this.commonGraphUtils.nodeLocationsCompatible(cy, connectedNode, vlNeighborNode)) {
                        compatibleNodeCount++;
                    }
                });

                if (compatibleNodeCount < 2) {
                    connectedVLsToDelete = connectedVLsToDelete.add(connectedNode);
                }
            }
        });

        connectedVLsToDelete.each((i, vlToDelete: Cy.CollectionNodes) => {
            this.deleteNode(cy, component, vlToDelete);
        });
        return connectedVLsToDelete;
    };

    /**
     * This function will update nodes position. if the new position is into or out of ucpe, the node will trigger the ucpe events
     * @param cy
     * @param component
     * @param nodesMoved - the node/multiple nodes now moved by the user
     */
    public onNodesPositionChanged = (cy: Cy.Instance, component: Component, nodesMoved: Cy.CollectionNodes): void => {

        if (nodesMoved.length === 0) {
            return;
        }

        let isValidMove: boolean = this.GeneralGraphUtils.isGroupValidDrop(cy, nodesMoved);
        if (isValidMove) {

            this.$log.debug(`composition-graph::ValidDrop:: updating node position`);
            let instancesToUpdateInNonBlockingAction: Array<ComponentInstance> = new Array<ComponentInstance>();

            _.each(nodesMoved, (node: Cy.CollectionFirstNode) => {  //update all nodes new position

                if (node.data().isUcpePart && !node.data().isUcpe) {
                    return;
                }//No need to update UCPE-CPs

                //update position
                let newPosition: Cy.Position = this.commonGraphUtils.getNodePosition(node);
                node.data().componentInstance.updatePosition(newPosition.x, newPosition.y);

                //check if node moved to or from UCPE
                let ucpe = this.commonGraphUtils.isInUcpe(node.cy(), node.boundingbox());
                if (node.data().isInsideGroup || ucpe.length) {
                    this.handleUcpeChildMove(node, ucpe, instancesToUpdateInNonBlockingAction);
                } else {
                    instancesToUpdateInNonBlockingAction.push(node.data().componentInstance);
                }

            });

            if (instancesToUpdateInNonBlockingAction.length > 0) {
                this.GeneralGraphUtils.pushMultipleUpdateComponentInstancesRequestToQueue(false, instancesToUpdateInNonBlockingAction, component);
            }
        } else {
            this.$log.debug(`composition-graph::notValidDrop:: node return to latest position`);
            //reset nodes position
            nodesMoved.positions((i, node) => {
                return {
                    x: +node.data().componentInstance.posX,
                    y: +node.data().componentInstance.posY
                };
            })
        }

        this.GeneralGraphUtils.getGraphUtilsServerUpdateQueue().addBlockingUIActionWithReleaseCallback(() => {
        }, () => {
            this.loaderService.hideLoader('composition-graph');
        });

    };

    /**
     * Checks whether the node has been added or removed from UCPE and triggers appropriate events
     * @param node - node moved
     * @param ucpeContainer - UCPE container that the node has been moved to. When moving a node out of ucpe, param will be empty
     * @param instancesToUpdateInNonBlockingAction
     */
    public handleUcpeChildMove(node: Cy.CollectionFirstNode, ucpeContainer: Cy.CollectionElements, instancesToUpdateInNonBlockingAction: Array<ComponentInstance>) {

        if (node.data().isInsideGroup) {
            if (ucpeContainer.length) { //moving node within UCPE. Simply update position
                this.commonGraphUtils.updateUcpeChildPosition(<Cy.CollectionNodes>node, ucpeContainer);
                instancesToUpdateInNonBlockingAction.push(node.data().componentInstance);
            } else { //removing node from UCPE. Notify observers
                this.eventListenerService.notifyObservers(GRAPH_EVENTS.ON_REMOVE_NODE_FROM_UCPE, node, ucpeContainer);
            }
        } else if (!node.data().isInsideGroup && ucpeContainer.length && !node.data().isUcpePart) { //adding node to UCPE
            this.eventListenerService.notifyObservers(GRAPH_EVENTS.ON_INSERT_NODE_TO_UCPE, node, ucpeContainer, true);
        }
    }

}


CompositionGraphNodesUtils.$inject = ['NodesFactory', '$log', 'CompositionGraphGeneralUtils', 'CommonGraphUtils', 'EventListenerService', 'LoaderService', 'ServiceServiceNg2' /*, 'sdcMenu', 'ModalsHandler'*/]