import { Component, OnInit, ViewChild } from '@angular/core';
import { MatPaginator, MatSort } from '@angular/material';
import { Router } from '@angular/router';
import { Observable } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { BaseComponent } from '../../../core/common/base/base.component';
import { ProjectStateType } from '../../../core/common/enum/project-state-type';
import { DataTableRequest } from '../../../core/model/data-table/data-table-request';
import { ProjectListingModel } from '../../../core/model/project/project-listing';
import { ProjectCriteria } from '../../../core/query/project/project-criteria';
import { ProjectService } from '../../../core/services/project/project.service';
import { BreadcrumbItem } from '../../misc/breadcrumb/definition/breadcrumb-item';
import { IBreadCrumbComponent } from '../../misc/breadcrumb/definition/IBreadCrumbComponent';
import { ProjectCriteriaComponent } from './criteria/project-criteria.component';
import { LanguageResolverService } from '../../../services/language-resolver/language-resolver.service';

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

	@ViewChild(MatPaginator) _paginator: MatPaginator;
	@ViewChild(MatSort) sort: MatSort;
	@ViewChild(ProjectCriteriaComponent) criteria: ProjectCriteriaComponent;

	breadCrumbs: Observable<BreadcrumbItem[]> = Observable.of([]);
	totalCount: number;
	listingItems: ProjectListingModel[] = [];

	constructor(
		private projectService: ProjectService,
		private router: Router,
		public languageResolverService: LanguageResolverService
	) {
		super();
	}

	ngOnInit() {
		this.breadCrumbs = Observable.of([]);

		this.criteria.setCriteria(this.getDefaultCriteria());
		this.refresh();
		this.criteria.setRefreshCallback((resetPages) => this.refresh(resetPages));
	}

	refresh(resetPages = false) {
		if (this._paginator.pageSize === undefined) this._paginator.pageSize = 10;
		if (resetPages) this._paginator.pageIndex = 0;
		const startIndex = this._paginator.pageIndex * this._paginator.pageSize;
		let fields: Array<string> = new Array();
		if (this.sort && this.sort.active) { fields = this.sort.direction === 'asc' ? ['+' + this.sort.active] : ['-' + this.sort.active]; }
		const request = new DataTableRequest<ProjectCriteria>(startIndex, this._paginator.pageSize, { fields: fields });
		request.criteria = this.criteria.criteria;
		this.projectService.getPaged(request, "listing").pipe(takeUntil(this._destroyed)).subscribe(result => {
			if (!result) { return []; }
			if (this._paginator.pageIndex === 0) { this.totalCount = result.totalCount; }
			this.listingItems = result.data;
		});
	}

	rowClicked(project: ProjectListingModel) {
		this.router.navigate(['/projects/edit/' + project.id]);
	}

	getDefaultCriteria(): ProjectCriteria {
		const defaultCriteria = new ProjectCriteria();
		return defaultCriteria;
	}

	pageThisEvent(event) {
		this.refresh();
	}
}