import { AfterViewInit, Component, OnInit, ViewChild } from '@angular/core';
import { FormGroup } from '@angular/forms';
import { MatDialog, MatSnackBar, MatStepper } from '@angular/material';
import { ActivatedRoute, Params, Router } from '@angular/router';
import { TranslateService } from '@ngx-translate/core';
import * as FileSaver from 'file-saver';
import { Observable } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { ValidationErrorModel } from '../../../common/forms/validation/error-model/validation-error-model';
import { BaseComponent } from '../../../core/common/base/base.component';
import { DatasetStatus } from '../../../core/common/enum/dataset-status';
import { DatasetProfileModel } from '../../../core/model/dataset/dataset-profile';
import { DmpModel } from '../../../core/model/dmp/dmp';
import { DmpListingModel } from '../../../core/model/dmp/dmp-listing';
import { DatasetProfileCriteria } from '../../../core/query/dataset-profile/dataset-profile-criteria';
import { DmpCriteria } from '../../../core/query/dmp/dmp-criteria';
import { RequestItem } from '../../../core/query/request-item';
import { DatasetWizardService } from '../../../core/services/dataset-wizard/dataset-wizard.service';
import { DmpService } from '../../../core/services/dmp/dmp.service';
import { ExternalSourcesConfigurationService } from '../../../core/services/external-sources/external-sources-configuration.service';
import { ExternalSourcesService } from '../../../core/services/external-sources/external-sources.service';
import { SingleAutoCompleteConfiguration } from '../../../library/auto-complete/single/single-auto-complete-configuration';
import { SnackBarNotificationComponent } from '../../../library/notification/snack-bar/snack-bar-notification.component';
import { BreadcrumbItem } from '../../misc/breadcrumb/definition/breadcrumb-item';
import { IBreadCrumbComponent } from '../../misc/breadcrumb/definition/IBreadCrumbComponent';
import { DatasetDescriptionFormEditorModel } from '../../misc/dataset-description-form/dataset-description-form.model';
import { DatasetWizardEditorModel } from './dataset-wizard-editor.model';

@Component({
	selector: 'app-dataset-wizard-component',
	templateUrl: 'dataset-wizard.component.html',
	styleUrls: ['./dataset-wizard.component.scss']
})
export class DatasetWizardComponent extends BaseComponent implements OnInit, AfterViewInit, IBreadCrumbComponent {

	breadCrumbs: Observable<BreadcrumbItem[]>;
	viewOnly = false;
	@ViewChild('stepper') stepper: MatStepper;
	editMode = false;

	DatasetStatus = DatasetStatus;
	dmpAutoCompleteConfiguration: SingleAutoCompleteConfiguration;

	datasetWizardModel: DatasetWizardEditorModel;
	isNew = true;
	formGroup: FormGroup;
	datasetProfileDefinitionModel: DatasetDescriptionFormEditorModel;

	availableProfiles: DatasetProfileModel[] = [];
	itemId: string;
	isLinear = false;
	firstStepFormGroup: FormGroup;
	secondFormGroup: FormGroup;



	constructor(
		private datasetWizardService: DatasetWizardService,
		private route: ActivatedRoute,
		public snackBar: MatSnackBar,
		public router: Router,
		public language: TranslateService,
		public externalSourcesService: ExternalSourcesService,
		public dmpService: DmpService,
		public dialog: MatDialog,
		public externalSourcesConfigurationService: ExternalSourcesConfigurationService
	) {
		super();
	}


	ngOnInit() {
		this.route
			.data
			.pipe(takeUntil(this._destroyed))
			.subscribe(v => this.viewOnly = v['public']);

		const dmpRequestItem: RequestItem<DmpCriteria> = new RequestItem();
		dmpRequestItem.criteria = new DmpCriteria();

		// const externalDatasetRequestItem: RequestItem<ExternalDatasetCriteria> = new RequestItem();
		// externalDatasetRequestItem.criteria = new ExternalDatasetCriteria();
		// this.externalDatasetAutoCompleteConfiguration = new AutoCompleteConfiguration(this.externalSourcesService.searchDatasetSExternalDatasetservice.bind(this.externalSourcesService),
		// 	externalDatasetRequestItem, new BehaviorSubject(false));

		// const registriesRequestItem: RequestItem<RegistryCriteria> = new RequestItem();
		// registriesRequestItem.criteria = new RegistryCriteria();
		// this.registriesAutoCompleteConfiguration = new AutoCompleteConfiguration(this.externalSourcesService.searchDatasetRegistry.bind(this.externalSourcesService),
		// 	registriesRequestItem, new BehaviorSubject(false));

		// const dataRepositoriesRequestItem: RequestItem<DataRepositoryCriteria> = new RequestItem();
		// dataRepositoriesRequestItem.criteria = new DataRepositoryCriteria();
		// this.dataRepositoriesAutoCompleteConfiguration = new AutoCompleteConfiguration(this.externalSourcesService.searchDatasetRepository.bind(this.externalSourcesService),
		// 	dataRepositoriesRequestItem, new BehaviorSubject(false));

		// const servicesRequestItem: RequestItem<ServiceCriteria> = new RequestItem();
		// servicesRequestItem.criteria = new ServiceCriteria();
		// this.servicesAutoCompleteConfiguration = new AutoCompleteConfiguration(this.externalSourcesService.searchDatasetService.bind(this.externalSourcesService),
		// 	servicesRequestItem, new BehaviorSubject(false));

		// const tagsRequestItem: RequestItem<TagCriteria> = new RequestItem();
		// tagsRequestItem.criteria = new TagCriteria();
		// this.tagsAutoCompleteConfiguration = new AutoCompleteConfiguration(this.externalSourcesService.searchDatasetTags.bind(this.externalSourcesService),
		// 	tagsRequestItem, new BehaviorSubject(false));

		this.dmpAutoCompleteConfiguration = {
			filterFn: this.searchDmp.bind(this),
			initialItems: (extraData) => this.searchDmp(''),
			displayFn: (item) => item['label'],
			titleFn: (item) => item['label']
		};

		const params = this.route.snapshot.params;
		this.itemId = params['id'];
		const dmpId = params['dmpId'];
		if (this.itemId != null) {
			this.isNew = false;
			this.datasetWizardService.getSingle(this.itemId)
				.pipe(takeUntil(this._destroyed))
				.subscribe(data => {
					this.datasetWizardModel = new DatasetWizardEditorModel().fromModel(data);
					this.breadCrumbs = Observable.of([
						{
							parentComponentName: null,
							label: 'Datasets',
							url: '/datasets',
							notFoundResolver: [
								{
									parentComponentName: null,
									label: this.datasetWizardModel.dmp.project.label,
									url: '/projects/edit/' + this.datasetWizardModel.dmp.project.id
								},
								{
									parentComponentName: null,
									label: this.datasetWizardModel.dmp.label,
									url: '/plans/edit/' + this.datasetWizardModel.dmp.id,
								},
							]
						}]);
					this.formGroup = this.datasetWizardModel.buildForm();
					this.editMode = this.datasetWizardModel.status === DatasetStatus.Draft;
					if (this.datasetWizardModel.status === 1) {
						this.formGroup.disable();
						this.viewOnly = true;
					}
					if (this.viewOnly) { this.formGroup.disable(); }
					this.loadDatasetProfiles();
				});
		} else if (dmpId != null) {
			this.isNew = true;
			this.dmpService.getSingle(dmpId).map(data => data as DmpModel)
				.pipe(takeUntil(this._destroyed))
				.subscribe(data => {
					this.datasetWizardModel = new DatasetWizardEditorModel();
					setTimeout(() => {
						this.datasetWizardModel.dmp = data;
						this.formGroup = this.datasetWizardModel.buildForm();
						this.editMode = this.datasetWizardModel.status === DatasetStatus.Draft;
						if (this.datasetWizardModel.status === 1) {
							this.formGroup.disable();
							this.viewOnly = true;
						}
						this.loadDatasetProfiles();
						this.breadCrumbs = Observable.of([
							{
								parentComponentName: null,
								label: 'Datasets',
								url: '/datasets',
								notFoundResolver: [
									{
										parentComponentName: null,
										label: this.datasetWizardModel.dmp.project.label,
										url: '/projects/edit/' + this.datasetWizardModel.dmp.project.id
									},
									{
										parentComponentName: null,
										label: this.datasetWizardModel.dmp.label,
										url: '/plans/edit/' + this.datasetWizardModel.dmp.id,
									}]
							}]);
					});
				});
		} else {
			this.datasetWizardModel = new DatasetWizardEditorModel();
			this.formGroup = this.datasetWizardModel.buildForm();
			this.editMode = this.datasetWizardModel.status === DatasetStatus.Draft;
			if (this.datasetWizardModel.status === 1) {
				this.formGroup.disable();
				this.viewOnly = true;
			}
			if (this.viewOnly) { this.formGroup.disable(); }
			this.formGroup.get('dmp').valueChanges
				.pipe(takeUntil(this._destroyed))
				.subscribe(x => {
					this.loadDatasetProfiles();
				});
		}
	}

	ngAfterViewInit() {
		this.route.params
			.pipe(takeUntil(this._destroyed))
			.subscribe((params: Params) => {
				const itemId = params['id'];
				if (itemId != null) { this.stepper.selectedIndex = 2; }
			});
	}

	searchDmp(query: string): Observable<DmpListingModel[]> {
		const dmpRequestItem: RequestItem<DmpCriteria> = new RequestItem();
		dmpRequestItem.criteria = new DmpCriteria();
		dmpRequestItem.criteria.like = query;
		return this.dmpService.get(dmpRequestItem);
	}

	loadDatasetProfiles() {
		const datasetProfileRequestItem: RequestItem<DatasetProfileCriteria> = new RequestItem();
		datasetProfileRequestItem.criteria = new DatasetProfileCriteria();
		datasetProfileRequestItem.criteria.id = this.formGroup.get('dmp').value.id;
		if (datasetProfileRequestItem.criteria.id) {
			this.datasetWizardService.getAvailableProfiles(datasetProfileRequestItem)
				.pipe(takeUntil(this._destroyed))
				.subscribe(items => {
					this.availableProfiles = items;
				});
		}
	}

	public cancel(): void {
		//this.router.navigate(['/plans']);
	}

	getDefinition() {
		if (this.formGroup.invalid) { this.stepper.selectedIndex = 0; return; }
		if (this.isNew) {
			this.datasetWizardService.getDefinition(this.formGroup.get('profile').value)
				.pipe(takeUntil(this._destroyed))
				.subscribe(item => {
					this.datasetWizardModel.datasetProfileDefinition = new DatasetDescriptionFormEditorModel().fromModel(item);
					this.datasetProfileDefinitionModel = this.datasetWizardModel.datasetProfileDefinition;
					this.formGroup.addControl('datasetProfileDefinition', this.datasetProfileDefinitionModel.buildForm());
				});
		}
	}


	formSubmit(): void {
		if (!this.isFormValid()) { return; }
		this.onSubmit();
	}

	public isFormValid() {
		return this.formGroup.valid;
	}

	onSubmit(): void {
		this.datasetWizardService.createDataset(this.formGroup.value)
			.pipe(takeUntil(this._destroyed))
			.subscribe(
				complete => {
					this.datasetWizardService.getSingle(complete.id)
						.pipe(takeUntil(this._destroyed))
						.subscribe(
							result => {
								this.datasetWizardModel = new DatasetWizardEditorModel().fromModel(result);
							}
						);
					this.onCallbackSuccess();
				},
				error => this.onCallbackError(error)
			);
	}

	submit() {
		this.datasetWizardService.createDataset(this.formGroup.value)
			.pipe(takeUntil(this._destroyed))
			.subscribe(data => {
				this.router.navigateByUrl('/datasets/dmp/' + this.formGroup.get('dmp').value.id);
			});
	}


	save() {
		if (!this.isFormValid()) { return; }
		this.formGroup.get('status').setValue('0');
		this.submit();
	}

	saveFinalize() {
		if (!this.isFormValid()) { return; }
		this.formGroup.get('status').setValue('1');
		this.submit();
	}

	onCallbackSuccess(): void {
		this.snackBar.openFromComponent(SnackBarNotificationComponent, {
			data: { message: this.isNew ? 'GENERAL.SNACK-BAR.SUCCESSFUL-CREATION' : 'GENERAL.SNACK-BAR.SUCCESSFUL-UPDATE', language: this.language },
			duration: 3000,
		});
	}

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

	public setErrorModel(validationErrorModel: ValidationErrorModel) {
		Object.keys(validationErrorModel).forEach(item => {
			(<any>this.datasetWizardModel.validationErrorModel)[item] = (<any>validationErrorModel)[item];
		});
	}

	downloadPDF(): void {
		this.datasetWizardService.downloadPDF(this.itemId)
			.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);
			});
	}

	downloadXML(): void {
		this.datasetWizardService.downloadXML(this.itemId)
			.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);
			});
	}

	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;
	}

	public redirectToProject() {
		this.router.navigate(['projects/edit/' + this.datasetWizardModel.dmp.project.id]);
	}

	public redirectToDmp() {
		this.router.navigate(['plans/edit/' + this.datasetWizardModel.dmp.id]);
	}

	public enableForm() {
		if (this.formGroup.get('status').value !== DatasetStatus.Finalized) {
			this.editMode = true;
			this.viewOnly = false;
			this.formGroup.enable();
		} else {
			this.datasetWizardService.unlock(this.formGroup.get('id').value)
				.pipe(takeUntil(this._destroyed))
				.subscribe(x => {
					this.editMode = true;
					this.viewOnly = false;
					this.datasetWizardModel.status = DatasetStatus.Draft;
					this.formGroup.get('status').patchValue(DatasetStatus.Draft);
					this.formGroup.enable();
				});
		}
	}

	public disableForm() {
		this.editMode = false;
		this.viewOnly = true;
		this.formGroup.disable();
	}

	isActiveStep(index: number) {
		return this.stepper.selectedIndex === index;
	}

	openConfirm(dmpLabel, id): void {
		// this._dialogService.openConfirm({
		// 	message: 'Are you sure you want to delete the "' + dmpLabel + '"',
		// 	disableClose: true || false,
		// 	viewContainerRef: this._viewContainerRef,
		// 	title: 'Confirm',
		// 	cancelButton: 'No',
		// 	acceptButton: 'Yes'
		// }).afterClosed()
		// 	.pipe(takeUntil(this._destroyed))
		// 	.subscribe((accept: boolean) => {
		// 		if (accept) {
		// 			this.datasetWizardService.delete(id)
		// 				.pipe(takeUntil(this._destroyed))
		// 				.subscribe(() => {
		// 					this.router.navigate(['/datasets']);
		// 				});
		// 		} else {
		// 			// DO SOMETHING ELSE
		// 		}
		// 	});
	}
}