import {AfterViewInit, Component, Input, OnChanges, OnDestroy, OnInit, SimpleChanges, ViewChild} from "@angular/core";
import {Indicator, IndicatorPath, Stakeholder} from "../utils/entities/stakeholder";
import {IndicatorUtils, Option} from "../utils/indicator-utils";
import {FormArray, FormBuilder, FormControl, FormGroup, Validators} from "@angular/forms";
import {AlertModal} from "../openaireLibrary/utils/modal/alert";
import {StatisticsService} from "../utils/services/statistics.service";
import {HelperFunctions} from "../openaireLibrary/utils/HelperFunctions.class";
import {DomSanitizer} from "@angular/platform-browser";
import {StakeholderService} from "../services/stakeholder.service";
import {EnvProperties} from "../openaireLibrary/utils/properties/env-properties";
import {Subscriber} from "rxjs";
import {LayoutService} from "../library/sharedComponents/sidebar/layout.service";

declare var UIkit;

@Component({
    selector: 'indicators',
    templateUrl: './indicators.component.html'
})
export class IndicatorsComponent implements OnInit, OnDestroy, OnChanges, AfterViewInit {

    @Input()
    public properties: EnvProperties = null;
    @Input()
    public topicIndex: number = 0;
    @Input()
    public categoryIndex: number = 0;
    @Input()
    public subcategoryIndex: number = 0;
    @Input()
    public stakeholder: Stakeholder = null;
    public indicatorUtils: IndicatorUtils = new IndicatorUtils();
    public indicatorFb: FormGroup;
    /**
     * Editable indicator
     */
    public indicator: Indicator;
    public index: number;
    /**
     * Displayed chart and numbers base on Top filters
     */
    public displayCharts: Indicator[] = [];
    public displayNumbers: Indicator[] = [];
    /**
     * Top filters
     */
    public filters: FormGroup;
    public all: Option = {
        value: 'all',
        label: 'All'
    };
    /**
     * Grid or List View
     */
    public grid: boolean = true;
    private subscriptions: any[] = [];
    private urlSubscriptions: any[] = [];
    @ViewChild('editIndicatorModal') editIndicatorModal: AlertModal;
    @ViewChild('deleteIndicatorModal') deleteIndicatorModal: AlertModal;

    constructor(private layoutService: LayoutService,
                private stakeholderService: StakeholderService,
                private statisticsService: StatisticsService,
                private fb: FormBuilder,
                private sanitizer: DomSanitizer) {
    }

    ngOnInit(): void {
        this.buildFilters();
    }

    ngOnDestroy(): void {
        this.subscriptions.forEach(value => {
            if (value instanceof Subscriber) {
                value.unsubscribe();
            } else if (value instanceof Function) {
                value();
            }
        });
    }

    ngAfterViewInit(): void {
        if (document !== undefined) {
            let callback = (list): void => {
                let items: HTMLCollection = list.current.children;
                let reordered = [];
                for (let i = 0; i < items.length; i++) {
                    if (items.item(i).id) {
                        reordered.push(items.item(i).id);
                    }
                }
                this.reorderIndicators(list.current.id, reordered);
            };
            this.subscriptions.push(UIkit.util.on(document, 'moved', '#chart', callback));
            this.subscriptions.push(UIkit.util.on(document, 'moved', '#number', callback));
        }
    }

    ngOnChanges(changes: SimpleChanges): void {
        if (this.canEdit) {
            if (changes.topicIndex || changes.categoryIndex || changes.subcategoryIndex) {
                this.buildFilters();
            }
            this.filterCharts();
            this.filterNumbers();
        }
    }

    public toggleOpen(event = null) {
        if (!event) {
            this.layoutService.setOpen(!this.open);
        } else if (event && event['value'] === true) {
            this.layoutService.setOpen(false);
        }
    }

    public changeGrid(value) {
        this.grid = value;
    }

    private buildFilters() {
        this.filters = this.fb.group({
            chartType: this.fb.control('all'),
            privacy: this.fb.control('all'),
            status: this.fb.control('all'),
            keyword: this.fb.control('')
        });
        this.subscriptions.push(this.filters.get('chartType').valueChanges.subscribe(value => {
            this.onChartTypeChange(value);
        }));
        this.subscriptions.push(this.filters.get('privacy').valueChanges.subscribe(value => {
            this.onPrivacyChange(value);
        }));
        this.subscriptions.push(this.filters.get('status').valueChanges.subscribe(value => {
            this.onStatusChange(value);
        }));
        this.subscriptions.push(this.filters.get('keyword').valueChanges.subscribe(value => {
            this.onKeywordChange(value);
        }));
    }

    filterCharts() {
        this.displayCharts = this.filterChartType(this.filterPrivacy(
            this.filterStatus(this.filterByKeyword(this.charts, this.filters.value.keyword),
                this.filters.value.status),
            this.filters.value.privacy),
            this.filters.value.chartType
        );
    }

    filterNumbers() {
        this.displayNumbers = this.filterPrivacy(this.filterStatus(
            this.filterByKeyword(this.numbers, this.filters.value.keyword),
            this.filters.value.status),
            this.filters.value.privacy);
    }

    onChartTypeChange(value) {
        this.displayCharts = this.filterChartType(this.charts, value);
    }

    onPrivacyChange(value) {
        this.displayCharts = this.filterPrivacy(this.charts, value);
        this.displayNumbers = this.filterPrivacy(this.numbers, value);
    }

    onStatusChange(value) {
        this.displayCharts = this.filterStatus(this.charts, value);
        this.displayNumbers = this.filterStatus(this.numbers, value);
    }

    onKeywordChange(value) {
        this.displayCharts = this.filterByKeyword(this.charts, value);
        this.displayNumbers = this.filterByKeyword(this.numbers, value);
    }

    private filterChartType(indicators: Indicator[], value): Indicator[] {
        if (value === 'all') {
            return indicators;
        } else {
            return indicators.filter(indicator =>
                indicator.indicatorPaths.filter(indicatorPath => indicatorPath.type === value).length > 0);
        }
    }

    private filterPrivacy(indicators: Indicator[], value): Indicator[] {
        if (value === 'all') {
            return indicators;
        } else {
            return indicators.filter(indicator => indicator.isPublic === value);
        }
    }

    private filterStatus(indicators: Indicator[], value): Indicator[] {
        if (value === 'all') {
            return indicators;
        } else {
            return indicators.filter(indicator => indicator.isActive === value);
        }
    }

    private filterByKeyword(indicators: Indicator[], value): Indicator[] {
        if (value === null || value === '') {
            return indicators;
        } else {
            return indicators.filter(indicator => (indicator.name && indicator.name.toLowerCase().includes(value.toLowerCase()))
                || (indicator.description && indicator.description.toLowerCase().includes(value.toLowerCase())));
        }
    }

    get charts(): Indicator[] {
        return this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex].charts;
    }

    set charts(indicators: Indicator[]) {
        this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex].charts = indicators;
    }

    get numbers(): Indicator[] {
        return this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex].numbers;
    }

    set numbers(indicators: Indicator[]) {
        this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex].numbers = indicators;
    }

    get open(): boolean {
        return this.layoutService.open;
    }

    get canNumbersReorder(): boolean {
        return this.displayNumbers.length === this.numbers.length;
    }

    get canChartsReorder(): boolean {
        return this.displayCharts.length === this.charts.length;
    }

    get canEdit() {
        return this.stakeholder &&
            this.stakeholder.topics[this.topicIndex] &&
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex] &&
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex];
    }

    public get indicatorPaths(): FormArray {
        return this.indicatorFb.get('indicatorPaths') as FormArray;
    }

    public getParameters(index: number): FormArray {
        return this.indicatorPaths.at(index).get('parameters') as FormArray;
    }

    public getParameter(index: number, key: string): FormControl {
        return this.getParameters(index).controls.filter(control => control.value.key === key)[0] as FormControl;
    }

    private getSecureUrlByStakeHolder(indicatorPath: IndicatorPath) {
        return this.sanitizer.bypassSecurityTrustResourceUrl(
            this.statisticsService.getChartUrl(indicatorPath.source, this.indicatorUtils.getFullUrl(indicatorPath)));
    }

    private getUrlByStakeHolder(indicatorPath: IndicatorPath) {
        return this.statisticsService.getChartUrl(indicatorPath.source, this.indicatorUtils.getFullUrl(indicatorPath));
    }

    public addIndicatorPath(value: string = '', parameters: FormArray = new FormArray([])) {
        this.indicatorPaths.push(this.fb.group({
                url: this.fb.control(value, [Validators.required,
                    Validators.pattern('https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|www\.' +
                        '[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\.[^\s]{2,}|https?:\/\/(?:www\.|(?!www))[a-zA-Z0-9]+\.[^\s]{2,}|www\.' +
                        '[a-zA-Z0-9]+\.[^\s]{2,}')]),
                parameters: parameters
            }
        ));
        let index = this.indicatorPaths.length - 1;
        this.urlSubscriptions.push(this.indicatorPaths.at(index).valueChanges.subscribe(value => {
                if (this.indicatorPaths.at(index).valid) {
                    let indicatorPath: IndicatorPath = this.indicatorUtils.generateIndicatorByChartUrl(this.statisticsService.getChartSource(value.url), value.url);
                    let parameters = this.getParametersAsFormArray(indicatorPath);
                    (this.indicatorPaths.at(index) as FormGroup).setControl('parameters', parameters);
                    if (!this.indicator.indicatorPaths[index]) {
                        this.indicator.indicatorPaths[index] = indicatorPath;
                        this.indicator.indicatorPaths[index].safeResourceUrl = this.getSecureUrlByStakeHolder(indicatorPath);
                    } else {
                        indicatorPath.safeResourceUrl = this.indicator.indicatorPaths[index].safeResourceUrl;
                        this.indicator.indicatorPaths[index] = indicatorPath;
                    }
                }
            })
        );
    }

    private getParametersAsFormArray(indicatorPath: IndicatorPath): FormArray {
        let parameters = this.fb.array([]);
        if (indicatorPath.parameters) {
            Object.keys(indicatorPath.parameters).forEach(key => {
                if (this.indicatorUtils.ignoredParameters.indexOf(key) === -1) {
                    if (this.indicatorUtils.parametersValidators.has(key)) {
                        parameters.push(this.fb.group({
                            key: this.fb.control(key),
                            value: this.fb.control(indicatorPath.parameters[key], this.indicatorUtils.parametersValidators.get(key))
                        }));
                    } else {
                        parameters.push(this.fb.group({
                            key: this.fb.control(key),
                            value: this.fb.control(indicatorPath.parameters[key])
                        }));
                    }
                }
            });
        }
        return parameters;
    }

    public editChartIndicatorOpen(id = null) {
        this.urlSubscriptions.forEach(value => {
           if(value instanceof Subscriber) {
               value.unsubscribe();
           }
        });
        this.index = (id) ? this.charts.findIndex(value => value._id === id) : -1;
        if (this.index !== -1) {
            this.indicator = HelperFunctions.copy(this.charts[this.index]);
            this.indicatorFb = this.fb.group({
                id: this.fb.control(this.indicator._id),
                name: this.fb.control(this.indicator.name/*, Validators.required*/),
                description: this.fb.control(this.indicator.description),
                isPublic: this.fb.control(this.indicator.isPublic),
                isActive: this.fb.control(this.indicator.isActive),
                indicatorPaths: this.fb.array([]),
                width: this.fb.control(this.indicator.width),
            });
            this.indicator.indicatorPaths.forEach(indicatorPath => {
                this.addIndicatorPath(this.getUrlByStakeHolder(indicatorPath), this.getParametersAsFormArray(indicatorPath));
                indicatorPath.safeResourceUrl = this.getSecureUrlByStakeHolder(indicatorPath)
            });
        } else {
            this.indicator = new Indicator('', '', 'chart', 'small', false, false, []);
            this.indicatorFb = this.fb.group({
                id: this.fb.control(null),
                name: this.fb.control(''),
                description: this.fb.control(''),
                isPublic: this.fb.control(false),
                isActive: this.fb.control(false),
                indicatorPaths: this.fb.array([]),
                width: this.fb.control('small', Validators.required),
            });
            this.addIndicatorPath();
        }
        this.editIndicatorModal.cancelButtonText = 'Cancel';
        this.editIndicatorModal.okButtonLeft = false;
        this.editIndicatorModal.alertMessage = false;
        if (this.index === -1) {
            this.editIndicatorModal.alertTitle = 'Create a new chart Indicator';
            this.editIndicatorModal.okButtonText = 'Save';
        } else {
            this.editIndicatorModal.okButtonText = 'Save Changes';
        }
        this.editIndicatorModal.open();
    }

    saveIndicator() {
        if (this.indicator.type === 'chart') {
            this.indicator = this.indicatorUtils.generateIndicatorByForm(this.indicatorFb.value, this.indicator.indicatorPaths);
        }
        let path = [
            this.stakeholder._id,
            this.stakeholder.topics[this.topicIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex]._id
        ];
        this.stakeholderService.saveElement(this.properties.monitorServiceAPIURL, this.indicator, path).subscribe(indicator => {
            if (this.index !== -1) {
                this.charts[this.index] = indicator;
            } else {
                this.charts.push(indicator);
            }
            this.filterCharts();
            this.stakeholderService.setStakeholder(this.stakeholder);
            this.indicatorFb = null;
        }, error => {
            this.indicatorFb = null;
        });
    }

    reorderIndicators(type: string, indicatorIds: string[]) {
        let path = [
            this.stakeholder._id,
            this.stakeholder.topics[this.topicIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex]._id
        ];
        this.stakeholderService.reorderIndicators(this.properties.monitorServiceAPIURL, path, indicatorIds, type).subscribe(indicators => {
            if (type === 'chart') {
                this.charts = indicators;
                this.filterCharts();
            } else {
                this.numbers = indicators;
                this.filterNumbers();
            }
            this.stakeholderService.setStakeholder(this.stakeholder);
        });
    }

    hasDifference(index: number): boolean {
        return this.indicator.indicatorPaths[index].safeResourceUrl.toString() !==
            this.getSecureUrlByStakeHolder(this.indicator.indicatorPaths[index]).toString();
    }

    refreshIndicator() {
        this.indicator = this.indicatorUtils.generateIndicatorByForm(this.indicatorFb.value, this.indicator.indicatorPaths);
        this.indicator.indicatorPaths.forEach(indicatorPath => {
            indicatorPath.safeResourceUrl = this.getSecureUrlByStakeHolder(indicatorPath);
        });
    }

    deleteIndicatorOpen(id: string, type: string = 'chart') {
        if (type === 'chart') {
            this.indicator = this.charts.find(value => value._id == id);
        } else {
            this.indicator = this.numbers.find(value => value._id == id);
        }
        this.deleteIndicatorModal.alertTitle = 'Delete ' + this.indicator.name;
        this.deleteIndicatorModal.cancelButtonText = 'No';
        this.deleteIndicatorModal.okButtonText = 'Yes';
        this.deleteIndicatorModal.message = 'This indicator will permanently be deleted. Are you sure you want to proceed?';
        this.deleteIndicatorModal.open();
    }

    deleteIndicator() {
        let path = [
            this.stakeholder._id,
            this.stakeholder.topics[this.topicIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex]._id,
            this.indicator._id
        ];
        this.stakeholderService.deleteElement(this.properties.monitorServiceAPIURL, path).subscribe(() => {
            if (this.indicator.type === 'chart') {
                this.charts.splice(this.index, 1);
            } else {
                this.numbers.splice(this.index, 1);
            }
            this.stakeholderService.setStakeholder(this.stakeholder);
        });
    }

    toggleIndicatorStatus(indicator: Indicator) {
        let path = [
            this.stakeholder._id,
            this.stakeholder.topics[this.topicIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex]._id,
            indicator._id
        ];
        this.stakeholderService.toggleStatus(this.properties.monitorServiceAPIURL, path).subscribe(isActive => {
            indicator.isActive = isActive;
            this.stakeholderService.setStakeholder(this.stakeholder);
        });
    }

    toggleIndicatorAccess(indicator: Indicator) {
        let path = [
            this.stakeholder._id,
            this.stakeholder.topics[this.topicIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex]._id,
            this.stakeholder.topics[this.topicIndex].categories[this.categoryIndex].subCategories[this.subcategoryIndex]._id,
            indicator._id
        ];
        this.stakeholderService.toggleAccess(this.properties.monitorServiceAPIURL, path).subscribe(isPublic => {
            indicator.isPublic = isPublic;
            this.stakeholderService.setStakeholder(this.stakeholder);
        });
    }
}