import {Component, OnInit, Output, EventEmitter, Input, ViewChild} from '@angular/core';
import { DatasetListingModel } from '@app/core/model/dataset/dataset-listing';
import { DatasetService } from '@app/core/services/dataset/dataset.service';
import { DataTableRequest } from '@app/core/model/data-table/data-table-request';
import { DatasetCriteria } from '@app/core/query/dataset/dataset-criteria';
import { AuthService } from '@app/core/services/auth/auth.service';
import { BaseComponent } from '@common/base/base.component';
import { Principal } from '@app/core/model/auth/principal';
import { TranslateService } from '@ngx-translate/core';
import { EnumUtils } from '@app/core/services/utilities/enum-utils.service';
import { FormControl, FormBuilder } from '@angular/forms';
import { DatasetCopyDialogueComponent } from '@app/ui/dataset/dataset-wizard/dataset-copy-dialogue/dataset-copy-dialogue.component';
import { MatDialog } from '@angular/material/dialog';
import { debounceTime, takeUntil } from 'rxjs/operators';
import {ActivatedRoute, Router} from '@angular/router';
import { DatasetWizardService } from '@app/core/services/dataset-wizard/dataset-wizard.service';
import * as FileSaver from 'file-saver';
import { ConfirmationDialogComponent } from '@common/modules/confirmation-dialog/confirmation-dialog.component';
import { ValidationErrorModel } from '@common/forms/validation/error-model/validation-error-model';
import { UiNotificationService } from '@app/core/services/notification/ui-notification-service';
import { SnackBarNotificationLevel } from '@common/modules/notification/ui-notification-service';
import { DatasetStatus } from '@app/core/common/enum/dataset-status';
import { DmpInvitationDialogComponent } from '@app/ui/dmp/invitation/dmp-invitation-dialog.component';
import { RecentActivityOrder } from '@app/core/common/enum/recent-activity-order';
import { Role } from '@app/core/common/enum/role';
import { Location } from '@angular/common';
import { LockService } from '@app/core/services/lock/lock.service';
import { MatomoService } from '@app/core/services/matomo/matomo-service';
import { HttpClient } from '@angular/common/http';
import {ConfigurationService} from "@app/core/services/configuration/configuration.service";

@Component({
	selector: 'app-recent-edited-dataset-activity',
	templateUrl: './recent-edited-dataset-activity.component.html',
	styleUrls: ['./recent-edited-dataset-activity.component.scss']
})
export class RecentEditedDatasetActivityComponent extends BaseComponent implements OnInit {

	@Output() totalCountDatasets: EventEmitter<any> = new EventEmitter();

	@ViewChild("datasets") resultsContainer;

	datasetActivities: DatasetListingModel[];
	totalCount: number;
	startIndex: number = 0;
	offsetLess: number = 0;
	hasMoreResults:boolean = true;
	pageSize: number = 5;
	public formGroup = new FormBuilder().group({
		like: new FormControl(),
		order: new FormControl()
	});
	publicMode = false;

	order = RecentActivityOrder;

	page: number = 1;
	@Input() isActive: boolean = false;

	constructor(
		private route: ActivatedRoute,
		private authentication: AuthService,
		private datasetService: DatasetService,
		private language: TranslateService,
		public enumUtils: EnumUtils,
		public dialog: MatDialog,
		public router: Router,
		private datasetWizardService: DatasetWizardService,
		private uiNotificationService: UiNotificationService,
		private location: Location,
		private lockService: LockService,
		private httpClient: HttpClient,
		private matomoService: MatomoService,
		private configurationService: ConfigurationService
	) {
		super();
	}

	ngOnInit() {
		this.matomoService.trackPageView('Recent Dataset Activity');
		this.route.queryParams.subscribe(params => {
			if(this.isActive) {
				let page = (params['page'] === undefined) ? 1 : +params['page'];
				this.page = (page <= 0) ? 1 : page;

				this.startIndex = (this.page-1)*this.pageSize;
				if(this.page > 1) {
					this.offsetLess = (this.page-2)*this.pageSize;
				}

				let order = params['order'];
				if (this.isAuthenticated()) {
					if(order === undefined || (order != this.order.MODIFIED && order != this.order.LABEL && order != this.order.STATUS)) {
						order = this.order.MODIFIED;
					}
				} else {
					if(order === undefined || (order != this.order.DATASETPUBLISHED && order != this.order.LABEL)) {
						order = this.order.DATASETPUBLISHED;
					}
				}
				this.formGroup.get('order').setValue(order);

				let keyword = (params['keyword'] === undefined || params['keyword'].length <= 0) ? "" : params['keyword'];
				this.formGroup.get("like").setValue(keyword);

				this.updateUrl();
			}
		});
		if (this.isAuthenticated()) {
			// const fields: Array<string> = ["-modified"];
			if(!this.formGroup.get('order').value) {
				this.formGroup.get('order').setValue(this.order.MODIFIED);
			}
			const fields: Array<string> = [((this.formGroup.get('order').value === 'status') || (this.formGroup.get('order').value === 'label') ? '+' : "-") + this.formGroup.get('order').value];
			const datasetDataTableRequest: DataTableRequest<DatasetCriteria> = new DataTableRequest(this.startIndex, this.pageSize, { fields: fields });
			datasetDataTableRequest.criteria = new DatasetCriteria();
			datasetDataTableRequest.criteria.like = this.formGroup.get('like').value;
			this.datasetService
				.getPaged(datasetDataTableRequest)
				.pipe(takeUntil(this._destroyed))
				.subscribe(response => {
					this.datasetActivities = response.data;
					this.totalCount = response.totalCount;
					this.totalCountDatasets.emit(this.datasetActivities.length)
					if(this.totalCount > 0 && this.totalCount <= (this.page-1)*this.pageSize && this.page > 1) {
						let queryParams = { type: "datasets", page: 1, order: this.formGroup.get("order").value };
						if(this.formGroup.get("like").value) {
							queryParams['keyword'] = this.formGroup.get("like").value;
						}
						this.router.navigate(["/home"],  { queryParams: queryParams })
					}
				});
				this.formGroup.get('like').valueChanges
				.pipe(takeUntil(this._destroyed), debounceTime(500))
				.subscribe(x => this.refresh());
			this.formGroup.get('order').valueChanges
				.pipe(takeUntil(this._destroyed))
				.subscribe(x => this.refresh());
		} else {
			this.publicMode = true;
			if(!this.formGroup.get('order').value) {
				this.formGroup.get('order').setValue(this.order.DATASETPUBLISHED);
			}
			const dataTableRequest = this.setPublicDataTableRequest();
			this.datasetService.getPaged(dataTableRequest).pipe(takeUntil(this._destroyed)).subscribe(response => {
				this.datasetActivities = response.data;
				this.totalCount = response.totalCount;
				this.totalCountDatasets.emit(this.datasetActivities.length);
				if(this.totalCount > 0 && this.totalCount <= (this.page-1)*this.pageSize && this.page > 1) {
					let queryParams = { type: "datasets", page: 1, order: this.formGroup.get("order").value };
					if(this.formGroup.get("like").value) {
						queryParams['keyword'] = this.formGroup.get("like").value;
					}
					this.router.navigate(["/home"],  { queryParams: queryParams })
				}
			});
			this.formGroup.get('like').valueChanges
				.pipe(takeUntil(this._destroyed), debounceTime(500))
				.subscribe(x => this.refresh());
			this.formGroup.get('order').valueChanges
				.pipe(takeUntil(this._destroyed))
				.subscribe(x => this.refresh());
		}
	}

	ngOnChanges() {
		if(this.isActive) {
			this.updateUrl();
		}
	}

	updateUrl() {
		let parameters = "?type=datasets"+
			(this.page != 1 ? "&page="+this.page : "") +
			(((this.formGroup.get("order").value != this.order.MODIFIED && !this.publicMode) || (this.formGroup.get("order").value != this.order.DATASETPUBLISHED && this.publicMode)) ? "&order="+this.formGroup.get("order").value : "") +
			(this.formGroup.get("like").value ? ("&keyword="+this.formGroup.get("like").value) : "");
		this.location.go(this.router.url.split('?')[0]+parameters);
	}

	setPublicDataTableRequest(fields?: Array<string>, more: boolean = true): DataTableRequest<DatasetCriteria> {
		const datasetCriteria = new DatasetCriteria();
		datasetCriteria.allVersions = false;
		datasetCriteria.isPublic = true;
		datasetCriteria.like = this.formGroup.get("like").value ? this.formGroup.get("like").value : "";
		if (!fields) {
			fields = new Array<string>('-dmp:publishedAt|join|');
		}
		const dataTableRequest: DataTableRequest<DatasetCriteria> = more ? new DataTableRequest(this.startIndex, this.pageSize, { fields: fields }) : new DataTableRequest(this.offsetLess, this.pageSize, { fields: fields });
		dataTableRequest.criteria = datasetCriteria;
		return dataTableRequest;
	}

	refresh(): void {
		this.startIndex = 0;
		this.page = 1;
		this.updateUrl();


		const fields: Array<string> = [((this.formGroup.get('order').value === 'status') || (this.formGroup.get('order').value === 'label') ? '+' : "-") + this.formGroup.get('order').value];
		const datasetDataTableRequest = this.isAuthenticated() ? new DataTableRequest<DatasetCriteria>(this.startIndex, this.pageSize, { fields: fields }) : this.setPublicDataTableRequest(fields);
		if (this.isAuthenticated()) {
			datasetDataTableRequest.criteria = new DatasetCriteria();
			datasetDataTableRequest.criteria.like = this.formGroup.get("like").value ? this.formGroup.get("like").value : "";
		}
		this.datasetService
			.getPaged(datasetDataTableRequest)
			.pipe(takeUntil(this._destroyed))
			.subscribe(response => {
				this.datasetActivities = response.data;
				this.totalCount = response.totalCount;
				this.totalCountDatasets.emit(this.datasetActivities.length);
				if(response.data.length< this.pageSize) {
					this.hasMoreResults = false;
				} else {
					this.hasMoreResults = true;
				}
			});
	}

	public loadNextOrPrevious(more: boolean = true) {
		this.startIndex = this.startIndex + this.pageSize;

		const fields: Array<string> = [((this.formGroup.get('order').value === 'status') || (this.formGroup.get('order').value === 'label') ? '+' : "-") + this.formGroup.get('order').value];
		let request;
		this.startIndex = (this.page)*this.pageSize;
		if(this.page > 1) {
			this.offsetLess = (this.page-2)*this.pageSize;
		}
		if(this.isAuthenticated()) {
			if(more) {
				request = new DataTableRequest<DatasetCriteria>(this.startIndex, this.pageSize, { fields: fields });
			} else {
				request = new DataTableRequest<DatasetCriteria>(this.offsetLess, this.pageSize, { fields: fields });
			}
		} else {
			request = this.setPublicDataTableRequest(fields, more);
		}
		if (this.isAuthenticated()) {
			request.criteria = new DatasetCriteria();
			request.criteria.like = this.formGroup.get("like").value ? this.formGroup.get("like").value : "";
		}

		this.datasetService.getPaged(request).pipe(takeUntil(this._destroyed)).subscribe(result => {
			if (!result || !result.data || result.data.length == 0) {
				this.hasMoreResults = false;
				// return [];
			} else {
				this.page = this.page + (more ? 1 : -1);
				this.updateUrl();
				// this.datasetActivities = this.datasetActivities.concat(result.data);
				// this.datasetActivities = this.datasetActivities.length > 0 ? this.mergeTwoSortedLists(this.datasetActivities, result.data, this.formGroup.get('order').value) : result.data;
				this.datasetActivities = result.data;

				if(result.data.length < this.pageSize) {
					this.hasMoreResults = false;
				} else {
					this.hasMoreResults = true;
				}

				this.totalCountDatasets.emit(this.datasetActivities.length);
				if (more) {
					this.resultsContainer.nativeElement.scrollIntoView();
				}
			}
		});
	}

	public isAuthenticated(): boolean {
		return !!this.authentication.current();
	}

	isUserOwner(activity: DatasetListingModel): boolean {
		const principal: Principal = this.authentication.current();
		if (principal) return !!activity.users.find(x => (x.role === Role.Owner) && (principal.id === x.id));
	}

	goToOverview(id: string): string[] {
		if (this.isAuthenticated()) {
			return ['../datasets/overview/' + id];
		} else {
			return ['../explore/publicOverview', id];
		}
	}

	roleDisplay(value: any) {
		const principal: Principal = this.authentication.current();
		let role: number;
		if (principal) {
			value.forEach(element => {
				if (principal.id === element.id) {
					role = element.role;
				}
			});
		}
		if (role === 0) {
			return this.language.instant('DMP-LISTING.OWNER');
		}
		else if (role === 1) {
			return this.language.instant('DMP-LISTING.MEMBER');
		}
		else {
			return this.language.instant('DMP-LISTING.OWNER');
		}
	}

	openDmpSearchDialogue(dataset: DatasetListingModel) {
		const formControl = new FormControl();
		const dialogRef = this.dialog.open(DatasetCopyDialogueComponent, {
			width: '500px',
			restoreFocus: false,
			data: {
				formControl: formControl,
				datasetId: dataset.id,
				datasetProfileId: dataset.profile.id,
				datasetProfileExist: false,
				confirmButton: this.language.instant('DATASET-WIZARD.DIALOGUE.COPY'),
				cancelButton: this.language.instant('DATASET-WIZARD.DIALOGUE.CANCEL')
			}
		});

		dialogRef.afterClosed().pipe(takeUntil(this._destroyed))
			.subscribe(result => {
				if (result && result.datasetProfileExist) {
					const newDmpId = result.formControl.value.id;
					this.router.navigate(['/datasets/copy/' + result.datasetId], { queryParams: { newDmpId: newDmpId } });
					// let url = this.router.createUrlTree(['/datasets/copy/', result.datasetId, { newDmpId: newDmpId }]);
					// window.open(url.toString(), '_blank');
				}
			});
	}

	deleteClicked(id: string) {
		this.lockService.checkLockStatus(id).pipe(takeUntil(this._destroyed))
			.subscribe(lockStatus => {
				if (!lockStatus) {
					this.openDeleteDialog(id);
				} else {
					this.openLockedByUserDialog();
				}
			});
	}

	openDeleteDialog(id: string): void {
		const dialogRef = this.dialog.open(ConfirmationDialogComponent, {
			maxWidth: '300px',
			restoreFocus: false,
			data: {
				message: this.language.instant('GENERAL.CONFIRMATION-DIALOG.DELETE-ITEM'),
				confirmButton: this.language.instant('GENERAL.CONFIRMATION-DIALOG.ACTIONS.DELETE'),
				cancelButton: this.language.instant('GENERAL.CONFIRMATION-DIALOG.ACTIONS.CANCEL'),
				isDeleteConfirmation: true
			}
		});
		dialogRef.afterClosed().pipe(takeUntil(this._destroyed)).subscribe(result => {
			if (result) {
				this.datasetWizardService.delete(id)
					.pipe(takeUntil(this._destroyed))
					.subscribe(
						complete => this.onDeleteCallbackSuccess(),
						error => this.onDeleteCallbackError(error)
					);
			}
		});
	}

	openLockedByUserDialog() {
		const dialogRef = this.dialog.open(ConfirmationDialogComponent, {
			maxWidth: '400px',
			restoreFocus: false,
			data: {
				message: this.language.instant('DATASET-WIZARD.ACTIONS.LOCK')
			}
		});
	}

	openShareDialog(dmpRowId: any, dmpRowName: any, activity: any) {
		const dialogRef = this.dialog.open(DmpInvitationDialogComponent, {
			// height: '250px',
			// width: '700px',
			autoFocus: false,
			restoreFocus: false,
			data: {
				dmpId: dmpRowId,
				dmpName: dmpRowName
			}
		});
	}

	getFilenameFromContentDispositionHeader(header: string): string {
		const regex: RegExp = new RegExp(/filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/g);

		const matches = header.match(regex);
		let filename: string;
		for (let i = 0; i < matches.length; i++) {
			const match = matches[i];
			if (match.includes('filename="')) {
				filename = match.substring(10, match.length - 1);
				break;
			} else if (match.includes('filename=')) {
				filename = match.substring(9);
				break;
			}
		}
		return filename;
	}

	downloadPDF(dataset: DatasetListingModel): void {
		this.datasetWizardService.downloadPDF(dataset.id as string)
			.pipe(takeUntil(this._destroyed))
			.subscribe(response => {
				const blob = new Blob([response.body], { type: 'application/pdf' });
				const filename = this.getFilenameFromContentDispositionHeader(response.headers.get('Content-Disposition'));

				FileSaver.saveAs(blob, filename);
				this.matomoService.trackDownload('datasets', "pdf", dataset.id);
			});
	}

	downloadDOCX(dataset: DatasetListingModel): void {
		this.datasetWizardService.downloadDOCX(dataset.id as string)
			.pipe(takeUntil(this._destroyed))
			.subscribe(response => {
				const blob = new Blob([response.body], { type: 'application/msword' });
				const filename = this.getFilenameFromContentDispositionHeader(response.headers.get('Content-Disposition'));

				FileSaver.saveAs(blob, filename);
				this.matomoService.trackDownload('datasets', "docx", dataset.id);
			});

	}

	downloadXML(dataset: DatasetListingModel): void {
		this.datasetWizardService.downloadXML(dataset.id as string)
			.pipe(takeUntil(this._destroyed))
			.subscribe(response => {
				const blob = new Blob([response.body], { type: 'application/xml' });
				const filename = this.getFilenameFromContentDispositionHeader(response.headers.get('Content-Disposition'));

				FileSaver.saveAs(blob, filename);
				this.matomoService.trackDownload('datasets', "xml", dataset.id);
			});
	}

	onCallbackSuccess(id?: String): void {
		this.uiNotificationService.snackBarNotification(this.language.instant('GENERAL.SNACK-BAR.SUCCESSFUL-UPDATE'), SnackBarNotificationLevel.Success);
		id ? this.router.navigate(['/reload']).then(() => { this.router.navigate(['/datasets', 'edit', id]); }) : this.router.navigate(['/datasets']);
	}

	onCallbackError(error: any) {
		this.setErrorModel(error.error);
	}

	reloadPage(): void {
		const path = this.location.path();
		this.router.navigateByUrl('/reload', { skipLocationChange: true }).then(() => {
			this.router.navigate([path]);
		});
	}

	onDeleteCallbackSuccess(): void {
		this.uiNotificationService.snackBarNotification(this.language.instant('GENERAL.SNACK-BAR.SUCCESSFUL-DELETE'), SnackBarNotificationLevel.Success);
		this.reloadPage();
	}

	onDeleteCallbackError(error) {
		this.uiNotificationService.snackBarNotification(error.error.message ? this.language.instant(error.error.message) : this.language.instant('GENERAL.SNACK-BAR.UNSUCCESSFUL-DELETE'), SnackBarNotificationLevel.Error);
	}

	openUpdateDatasetProfileDialogue(id: string) {
		const dialogRef = this.dialog.open(ConfirmationDialogComponent, {
			restoreFocus: false,
			data: {
				message: this.language.instant('DATASET-EDITOR.VERSION-DIALOG.QUESTION'),
				confirmButton: this.language.instant('GENERAL.CONFIRMATION-DIALOG.ACTIONS.CONFIRM'),
				cancelButton: this.language.instant('GENERAL.CONFIRMATION-DIALOG.ACTIONS.CANCEL'),
				isDeleteConfirmation: false
			}
		});
		dialogRef.afterClosed().pipe(takeUntil(this._destroyed)).subscribe(result => {
			if (result) {
				this.uiNotificationService.snackBarNotification(this.language.instant('DATASET-WIZARD.MESSAGES.SUCCESS-UPDATE-DATASET-PROFILE'), SnackBarNotificationLevel.Success);
				this.router.navigate(['/datasets/profileupdate/' + id]);
			}
		});
	}

	public setErrorModel(validationErrorModel: ValidationErrorModel) {
	}

	needsUpdate(activity: DatasetListingModel) {
		if (activity.isProfileLatestVersion || (activity.status === DatasetStatus.Finalized)
			|| (activity.isProfileLatestVersion == undefined && activity.status == undefined)) {
			return false;
		}
		else {
			return true;
		}
	}

	private mergeTwoSortedLists(arr1: DatasetListingModel[], arr2: DatasetListingModel[], order: string): DatasetListingModel[] {
		let merged = [];
		let index1 = 0;
		let index2 = 0;
		let current = 0;

		while (current < (arr1.length + arr2.length)) {
			let isArr1Depleted = index1 >= arr1.length;
			let isArr2Depleted = index2 >= arr2.length;
			if (order === 'modified') {
				if (!isArr1Depleted && (isArr2Depleted || (new Date(arr1[index1].modified) > new Date(arr2[index2].modified)))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			} else if (order === 'created') {
				if (!isArr1Depleted && (isArr2Depleted || (new Date(arr1[index1].created) > new Date(arr2[index2].created)))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			} else if (order === 'label') {
				if (!isArr1Depleted && (isArr2Depleted || (arr1[index1].label.localeCompare(arr2[index2].label)))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			} else if (order === 'status') {
				if (!isArr1Depleted && (isArr2Depleted || (arr1[index1].status < arr2[index2].status))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			} else if (order === 'dmp:publishedAt|join|') {
				if (!isArr1Depleted && (isArr2Depleted || (new Date(arr1[index1].dmpPublishedAt) > new Date(arr2[index2].dmpPublishedAt)))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			}
			current++;
		}
		return merged;
	}
}