import { HttpClient } from '@angular/common/http';
import { Component, OnInit, ViewChild } from '@angular/core';
import { MatPaginator } from '@angular/material/paginator';
import { MatSort, MatSortable } from '@angular/material/sort';
import { MatTableDataSource } from '@angular/material/table';
import { Layer } from 'src/app/models/layer.model';

@Component({
  selector: 'app-layers-list',
  templateUrl: './layers-list.component.html',
  styleUrls: ['./layers-list.component.scss']
})
export class LayersListComponent implements OnInit {
  displayedColumns = ['number', 'name', 'source'];
  dataSource!: MatTableDataSource<Layer>;

  @ViewChild(MatPaginator) paginator!: MatPaginator;
  @ViewChild(MatSort) sort!: MatSort;

  constructor(
    private _http: HttpClient
  ) { }

  async ngOnInit() {
    this.dataSource = new MatTableDataSource(await Layer.getList(this._http));
    this.dataSource.paginator = this.paginator;
    this.dataSource.sort = this.sort;
    this.dataSource.sort.sort({ id: 'number', start: 'desc' } as MatSortable);
  }

  applyFilter(event: Event) {
    const filterValue = (event.target as HTMLInputElement).value;
    this.dataSource.filter =  filterValue.trim().toLowerCase();
  }
  trackByUid(index : number, item : Layer) {
    return item.id;
  }
}