/*-
 * ============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, IAppMenu, LeftPanelModel, NodesFactory, LeftPaletteComponent, CompositionCiNodeBase, ComponentInstance, Point } from "app/models";
import { CompositionGraphGeneralUtils } from "../composition-graph/utils/composition-graph-general-utils";
import { EventListenerService } from "app/services";
import { ResourceType, GRAPH_EVENTS, EVENTS, ComponentInstanceFactory, ModalsHandler } from "app/utils";
import 'sdc-angular-dragdrop';
import { LeftPaletteLoaderService } from "../../../services/components/utils/composition-left-palette-service";
import { Resource } from "app/models/components/resource";
import { ComponentType } from "app/utils/constants";
import { LeftPaletteMetadataTypes } from "../../../models/components/displayComponent";
import { IDirectiveLinkFn, IScope } from "angular";


interface IPaletteScope extends IScope {
    components: Array<LeftPaletteComponent>;
    currentComponent: Component;
    model: any;
    displaySortedCategories: any;
    expandedSection: string;
    dragElement: JQuery;
    dragbleNode: {
        event: JQueryEventObject,
        components: LeftPaletteComponent,
        ui: any
    }

    addInstanceClick: () => void; // added code
    onPopupMouseOver: () => void  // added code
    onPopupMouseOut: () => void   // added code

    sectionClick: (section: string) => void;
    searchComponents: (searchText: string) => void;
    onMouseOver: (displayComponent: LeftPaletteComponent, elem: HTMLElement) => void;
    onMouseOut: (displayComponent: LeftPaletteComponent) => void;

    dragStartCallback: (event: JQueryEventObject, ui, displayComponent: LeftPaletteComponent) => void;
    dragStopCallback: () => void;
    onDragCallback: (event: JQueryEventObject) => void;

    setElementTemplate: (e: JQueryEventObject) => void;

    isOnDrag: boolean;
    isDragable: boolean;
    isLoading: boolean;
    isViewOnly: boolean;
}

export class Palette implements ng.IDirective {
    constructor(private $log: ng.ILogService,
        private LeftPaletteLoaderService: LeftPaletteLoaderService,
        private sdcConfig,
        private ComponentFactory,
        private ComponentInstanceFactory: ComponentInstanceFactory,
        private NodesFactory: NodesFactory,
        private CompositionGraphGeneralUtils: CompositionGraphGeneralUtils,
        private EventListenerService: EventListenerService,
        private sdcMenu: IAppMenu,
        private ModalsHandler: ModalsHandler
    ) {
    }

    private fetchingComponentFromServer: boolean = false;
    private nodeHtmlSubstitute: JQuery;

    scope = {
        currentComponent: '=',
        isViewOnly: '=',
        isLoading: '='
    };
    restrict = 'E';
    template = require('./palette.html');

    link: IDirectiveLinkFn = (scope: IPaletteScope, el: JQuery) => {
        this.LeftPaletteLoaderService.loadLeftPanel(scope.currentComponent);
        this.nodeHtmlSubstitute = $('<div class="node-substitute"><span></span><img /></div>');
        el.append(this.nodeHtmlSubstitute);
        this.registerEventListenerForLeftPalette(scope);

        this.initComponents(scope);
        this.initEvents(scope);
        this.initDragEvents(scope);
        this._initExpandedSection(scope, '');
        el.on('$destroy', () => {
            //remove listener of download event
            this.unRegisterEventListenerForLeftPalette(scope);
        });
    };


    private registerEventListenerForLeftPalette = (scope: IPaletteScope): void => {
        this.EventListenerService.registerObserverCallback(EVENTS.LEFT_PALETTE_UPDATE_EVENT, () => {
            this.updateLeftPanelDisplay(scope);
        });
    };

    private unRegisterEventListenerForLeftPalette = (scope: IPaletteScope): void => {
        this.EventListenerService.unRegisterObserver(EVENTS.LEFT_PALETTE_UPDATE_EVENT);
    };

    private leftPanelResourceFilter(resourcesNotAbstract: Array<LeftPaletteComponent>, resourceFilterTypes: Array<string>): Array<LeftPaletteComponent> {
        let filterResources = _.filter(resourcesNotAbstract, (component) => {
            return resourceFilterTypes.indexOf(component.getComponentSubType()) > -1;
        });
        return filterResources;
    }

    private initLeftPanel(leftPanelComponents: Array<LeftPaletteComponent>, resourceFilterTypes: Array<string>): LeftPanelModel {
        let leftPanelModel = new LeftPanelModel();

        if (resourceFilterTypes && resourceFilterTypes.length) {
            leftPanelComponents = this.leftPanelResourceFilter(leftPanelComponents, resourceFilterTypes);
        }
        leftPanelModel.numberOfElements = leftPanelComponents && leftPanelComponents.length || 0;

        if (leftPanelComponents && leftPanelComponents.length) {

            let categories: any = _.groupBy(leftPanelComponents, 'mainCategory');
            for (let category in categories)
                categories[category] = _.groupBy(categories[category], 'subCategory');

            leftPanelModel.sortedCategories = categories;
        }
        return leftPanelModel;
    }


    private initEvents(scope: IPaletteScope) {
        scope.sectionClick = (section: string) => {
            if (section === scope.expandedSection) {
                scope.expandedSection = '';
                return;
            }
            scope.expandedSection = section;
        };

        scope.onMouseOver = (displayComponent: LeftPaletteComponent, sectionElem: HTMLElement) => {
            if (this.isGroupOrPolicy(displayComponent)) {
                this.EventListenerService.notifyObservers(GRAPH_EVENTS.ON_PALETTE_COMPONENT_SHOW_POPUP_PANEL, scope.currentComponent, displayComponent, sectionElem);
            } else {
                if (scope.isOnDrag) {
                    return;
                }
                scope.isOnDrag = true;
                this.EventListenerService.notifyObservers(GRAPH_EVENTS.ON_PALETTE_COMPONENT_HOVER_IN, displayComponent);
                this.$log.debug('palette::onMouseOver:: fired');
            }

        };

        scope.onMouseOut = (displayComponent: LeftPaletteComponent) => {
            if (this.isGroupOrPolicy(displayComponent)) {
                this.EventListenerService.notifyObservers(GRAPH_EVENTS.ON_PALETTE_COMPONENT_HIDE_POPUP_PANEL);
            } else {
                scope.isOnDrag = false;
                this.EventListenerService.notifyObservers(GRAPH_EVENTS.ON_PALETTE_COMPONENT_HOVER_OUT);
            }
        };
    }

    private isGroupOrPolicy(component: LeftPaletteComponent): boolean {
        if (component &&
            (component.categoryType === LeftPaletteMetadataTypes.Group ||
                component.categoryType === LeftPaletteMetadataTypes.Policy)) {
            return true;
        }
        return false;
    }

    private initComponents(scope: IPaletteScope) {
        scope.searchComponents = (searchText: any): void => {
            scope.displaySortedCategories = this._searchComponents(searchText, scope.model.sortedCategories);
            this._initExpandedSection(scope, searchText);
        };

        scope.isDragable = scope.currentComponent.isComplex();
        this.updateLeftPanelDisplay(scope);
    }

    private updateLeftPanelDisplay(scope: IPaletteScope) {
        let entityType: string = scope.currentComponent.componentType.toLowerCase();
        let resourceFilterTypes: Array<string> = this.sdcConfig.resourceTypesFilter[entityType];
        scope.components = this.LeftPaletteLoaderService.getLeftPanelComponentsForDisplay(scope.currentComponent);
        //remove the container component  from the list
        let componentTempToDisplay = angular.copy(scope.components);
        componentTempToDisplay = _.remove(componentTempToDisplay, function (leftPalettecomponent) {
            return leftPalettecomponent.invariantUUID !== scope.currentComponent.invariantUUID;
        });
        scope.model = this.initLeftPanel(componentTempToDisplay, resourceFilterTypes);
        scope.displaySortedCategories = angular.copy(scope.model.sortedCategories);
    };

    private _initExpandedSection(scope: IPaletteScope, searchText: string): void {
        if (searchText == '') {
            let isContainingCategory: boolean = false;
            let categoryToExpand: string;
            if (scope.currentComponent && scope.currentComponent.categories && scope.currentComponent.categories[0]) {
                categoryToExpand = this.sdcMenu.categoriesDictionary[scope.currentComponent.categories[0].name];
                for (let category in scope.model.sortedCategories) {
                    if (categoryToExpand == category) {
                        isContainingCategory = true;
                        break;
                    }
                }
            }
            isContainingCategory ? scope.expandedSection = categoryToExpand : scope.expandedSection = 'Generic';
        }
        else {
            scope.expandedSection = Object.keys(scope.displaySortedCategories).sort()[0];
        }
    };

    private initDragEvents(scope: IPaletteScope) {
        scope.dragStartCallback = (event: IDragDropEvent, ui, displayComponent: LeftPaletteComponent): void => {
            if (scope.isLoading || !scope.isDragable || scope.isViewOnly || this.isGroupOrPolicy(displayComponent)) {
                return;
            }

            let component = _.find(this.LeftPaletteLoaderService.getLeftPanelComponentsForDisplay(scope.currentComponent), (componentFullData: LeftPaletteComponent) => {
                return displayComponent.uniqueId === componentFullData.uniqueId;
            });
            this.EventListenerService.notifyObservers(GRAPH_EVENTS.ON_PALETTE_COMPONENT_DRAG_START, scope.dragElement, component);

            scope.isOnDrag = true;

            // this.graphUtils.showMatchingNodes(component, myDiagram, scope.sdcConfig.imagesPath);
            // document.addEventListener('mousemove', moveOnDocument);
            event.dataTransfer.component = component;
        };

        scope.dragStopCallback = () => {
            scope.isOnDrag = false;
        };

        scope.onDragCallback = (event: IDragDropEvent): void => {
            this.EventListenerService.notifyObservers(GRAPH_EVENTS.ON_PALETTE_COMPONENT_DRAG_ACTION, event);
        };
        scope.setElementTemplate = (e) => {
            let dragComponent: LeftPaletteComponent = _.find(this.LeftPaletteLoaderService.getLeftPanelComponentsForDisplay(scope.currentComponent),
                (fullComponent: LeftPaletteComponent) => {
                    return (<any>angular.element(e.currentTarget).scope()).component.uniqueId === fullComponent.uniqueId;
                });
            let componentInstance: ComponentInstance = this.ComponentInstanceFactory.createComponentInstanceFromComponent(dragComponent);
            let node: CompositionCiNodeBase = this.NodesFactory.createNode(componentInstance);

            // myDiagram.dragFromPalette = node;
            this.nodeHtmlSubstitute.find("img").attr('src', node.img);
            scope.dragElement = this.nodeHtmlSubstitute.clone().show();

            return scope.dragElement;
        };
    }

    private _searchComponents = (searchText: string, categories: any): void => {
        let displaySortedCategories = angular.copy(categories);
        if (searchText != '') {
            angular.forEach(categories, function (category: any, categoryKey) {

                angular.forEach(category, function (subcategory: Array<LeftPaletteComponent>, subcategoryKey) {
                    let filteredResources = [];
                    angular.forEach(subcategory, function (component: LeftPaletteComponent) {

                        let resourceFilterTerm: string = component.searchFilterTerms.toLowerCase();
                        if (resourceFilterTerm.indexOf(searchText.toLowerCase()) >= 0) {
                            filteredResources.push(component);
                        }
                    });
                    if (filteredResources.length > 0) {
                        displaySortedCategories[categoryKey][subcategoryKey] = filteredResources;
                    }
                    else {
                        delete displaySortedCategories[categoryKey][subcategoryKey];
                    }
                });
                if (!(Object.keys(displaySortedCategories[categoryKey]).length > 0)) {
                    delete displaySortedCategories[categoryKey];
                }

            });
        }
        return displaySortedCategories;
    };

    public static factory = ($log,
        LeftPaletteLoaderService,
        sdcConfig,
        ComponentFactory,
        ComponentInstanceFactory,
        NodesFactory,
        CompositionGraphGeneralUtils,
        EventListenerService,
        sdcMenu,
        ModalsHandler
    ) => {
        return new Palette($log,
            LeftPaletteLoaderService,
            sdcConfig,
            ComponentFactory,
            ComponentInstanceFactory,
            NodesFactory,
            CompositionGraphGeneralUtils,
            EventListenerService,
            sdcMenu,
            ModalsHandler
        );
    };
}

Palette.factory.$inject = [
    '$log',
    'LeftPaletteLoaderService',
    'sdcConfig',
    'ComponentFactory',
    'ComponentInstanceFactory',
    'NodesFactory',
    'CompositionGraphGeneralUtils',
    'EventListenerService',
    'sdcMenu',
    'ModalsHandler'
];