/*-
 * ============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 {Component, NodesFactory, ComponentInstance, CompositionCiNodeVl,IAppMenu,AssetPopoverObj} 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";
/**
 * 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 sdcMenu: IAppMenu,
                    private ModalsHandler: ModalsHandler*/) {

    }

    /**
     * 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();
        })
    };

    /**
     * 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);
            }

            //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')
        );

    };

/*
        public confirmDeleteNode = (nodeId:string, cy:Cy.Instance, component:Component) => {
            let node:Cy.CollectionNodes = cy.getElementById(nodeId);
            let onOk = ():void => {
                this.deleteNode(cy, component, node);
            };

            let componentInstance:ComponentInstance = node.data().componentInstance;
            let state = "deleteInstance";
            let title:string =  this.sdcMenu.alertMessages[state].title;
            let message:string =  this.sdcMenu.alertMessages[state].message.format([componentInstance.name]);

            this.ModalsHandler.openAlertModal(title, message).then(onOk);
        };*/
    /**
     * 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);
        }
    }
        /**
         * Gets the position for the asset popover menu
         * Then, check if right edge of menu would overlap horizontal screen edge (palette offset + canvas width - right panel)
         * Then, check if bottom edge of menu would overlap the vertical end of the canvas.
         * @param cy
         * @param node
         * @returns {Cy.Position}
        
        public createAssetPopover = (cy: Cy.Instance, node:Cy.CollectionFirstNode, isViewOnly:boolean):AssetPopoverObj => {

            let menuOffset:Cy.Position = { x: node.renderedWidth() / 2, y: -(node.renderedWidth() / 2) };// getNodePositionWithOffset returns central point of node. First add node.renderedWidth()/2 to get its to border.
            let menuPosition:Cy.Position = this.commonGraphUtils.getNodePositionWithOffset(node, menuOffset);
            let menuSide:string = 'right';

            if(menuPosition.x + GraphUIObjects.COMPOSITION_NODE_MENU_WIDTH >= cy.width() + GraphUIObjects.DIAGRAM_PALETTE_WIDTH_OFFSET - GraphUIObjects.COMPOSITION_RIGHT_PANEL_OFFSET){
                menuPosition.x -= menuOffset.x * 2 + GraphUIObjects.COMPOSITION_NODE_MENU_WIDTH; //menu position already includes offset to the right. Therefore, subtract double offset so we have same distance from node for menu on left
                menuSide = 'left';
            }

            if(menuPosition.y + GraphUIObjects.COMPOSITION_NODE_MENU_HEIGHT >= cy.height()){
                menuPosition.y = menuPosition.y - GraphUIObjects.COMPOSITION_NODE_MENU_HEIGHT - menuOffset.y * 2;
            }

            return new AssetPopoverObj(node.data().id, node.data().name, menuPosition, menuSide, isViewOnly);
        };
 */

    }


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