import { Component, OnInit } from '@angular/core';
import { Params, ActivatedRoute, Router } from '@angular/router';
import { BaseComponent } from '../../../core/common/base/base.component';
import { DmpService } from '../../../core/services/dmp/dmp.service';
import { takeUntil } from 'rxjs/operators';
import { DmpOverviewModel } from '../../../core/model/dmp/dmp-overview';
import { TranslateService } from '@ngx-translate/core';
import { Principal } from '../../../core/model/auth/Principal';
import { AuthService } from '../../../core/services/auth/auth.service';
import { UserInfoListingModel } from '../../../core/model/user/user-info-listing';
import { DatasetOverviewModel } from '../../../core/model/dataset/dataset-overview';
import { MatDialog } from '@angular/material';
import { ConfirmationDialogComponent } from '../../../library/confirmation-dialog/confirmation-dialog.component';
import { UiNotificationService, SnackBarNotificationLevel } from '../../../core/services/notification/ui-notification-service';
import * as FileSaver from 'file-saver';
import { ExportMethodDialogComponent } from '../../../library/export-method-dialog/export-method-dialog.component';
import { Observable } from 'rxjs';
import { BreadcrumbItem } from '../../misc/breadcrumb/definition/breadcrumb-item';

@Component({
	selector: 'app-dmp-overview',
	templateUrl: './dmp-overview.component.html',
	styleUrls: ['./dmp-overview.component.scss']
})
export class DmpOverviewComponent extends BaseComponent implements OnInit {

	dmp: DmpOverviewModel;
	isNew = true;
	breadCrumbs: Observable<BreadcrumbItem[]> = Observable.of();

	constructor(
		private route: ActivatedRoute,
		private router: Router,
		private dmpService: DmpService,
		private translate: TranslateService,
		private authentication: AuthService,
		private dialog: MatDialog,
		private language: TranslateService,
		private uiNotificationService: UiNotificationService
	) {
		super();
	}

	ngOnInit() {
		// Gets dmp data using parameter id
		this.route.params
			.pipe(takeUntil(this._destroyed))
			.subscribe((params: Params) => {
				const itemId = params['id'];
				if (itemId != null) {
					this.isNew = false;
					this.dmpService.getOverviewSingle(itemId)
						.pipe(takeUntil(this._destroyed))
						.subscribe(data => {
							this.dmp = data;
							const breadCrumbs = [];
							breadCrumbs.push({ parentComponentName: null, label: 'DMPs', url: "/plans" });
							breadCrumbs.push({ parentComponentName: 'DmpListingComponent', label: this.dmp.label, url: '/overview/' + this.dmp.id });
							this.breadCrumbs = Observable.of(breadCrumbs);
						})
				}
			});
	}

	editClicked(dmp: DmpOverviewModel) {
		this.router.navigate(['/plans/edit/' + dmp.id]);
	}

	cloneClicked(dmp: DmpOverviewModel) {
		this.router.navigate(['/plans/clone/' + dmp.id]);
	}

	projectClicked(projectId: String) {
		this.router.navigate(['/projects/edit/' + projectId]);
	}

	datasetClicked(datasetId: String) {
		this.router.navigate(['/datasets/edit/' + datasetId]);
	}

	datasetsClicked(dmpId: String) {
		this.router.navigate(['/datasets'], { queryParams: { dmpId: dmpId } });
	}

	goToUri(uri: string) {
		window.open(uri, "_blank");
	}

	deleteClicked() {
		const dialogRef = this.dialog.open(ConfirmationDialogComponent, {
			maxWidth: '300px',
			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')
			}
		});
		dialogRef.afterClosed().pipe(takeUntil(this._destroyed)).subscribe(result => {
			if (result) {
				this.dmpService.delete(this.dmp.id)
					.pipe(takeUntil(this._destroyed))
					.subscribe(
					complete => { this.onCallbackSuccess() },
					error => this.onDeleteCallbackError(error)
					);
			}
		});
	}

	advancedClicked() {
		const dialogRef = this.dialog.open(ExportMethodDialogComponent, {
			maxWidth: '400px',
			data: {
				message: "Download as:",
				XMLButton: "XML",
				documentButton: "Document",
				pdfButton: "PDF"
			}
		});
		dialogRef.afterClosed().pipe(takeUntil(this._destroyed)).subscribe(result => {
			if (result == "pdf") {
				this.downloadPDF(this.dmp.id);
			} else if (result == "xml") {
				this.downloadXml(this.dmp.id);
			} else if (result == "doc") {
				this.downloadDocx(this.dmp.id);
			}
		});
	}

	onCallbackSuccess(): void {
		this.uiNotificationService.snackBarNotification(this.isNew ? this.language.instant('GENERAL.SNACK-BAR.SUCCESSFUL-CREATION') : this.language.instant('GENERAL.SNACK-BAR.SUCCESSFUL-UPDATE'), SnackBarNotificationLevel.Success);
		this.router.navigate(['/plans']);
	}

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

	downloadXml(id: string) {
		this.dmpService.downloadXML(id)
			.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);
			});
	}

	downloadDocx(id: string) {
		this.dmpService.downloadDocx(id)
			.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);
			});
	}

	downloadPDF(id: string) {
		this.dmpService.downloadPDF(id)
			.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);
			});
	}

	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;
	}

	roleDisplay(value: UserInfoListingModel[]) {
		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.translate.instant('DMP-LISTING.OWNER');
		}
		else if (role === 1) {
			return this.translate.instant('DMP-LISTING.MEMBER');
		}
		else {
			return this.translate.instant('DMP-LISTING.OWNER');
		}
	}

	isDraft(dataset: DatasetOverviewModel) {
		if (dataset.status == 0) { return true }
		else { return false }
	}
}