import {
    AfterContentInit, Component, ContentChildren, ElementRef, EventEmitter, Input, OnChanges, Output, QueryList,
    ViewChildren,
} from '@angular/core';
import {ApiSearchResponse} from '../../objects/api-search-response';
import {HFormService} from '../../services/h-form.service';
import {JsfElement} from '../../superclass/jsf-element';
import {AceColumnComponent} from '../ace-column/ace-column.component';
import {PaginatorComponent} from '../datatable/paginator/paginator.component';
import {FFacetComponent} from '../f-facet/f-facet.component';

@Component({
    selector: 'ace-data-table',
    templateUrl: './ace-data-table.component.html',
    styleUrls: ['./ace-data-table.component.css'],
})
export class AceDataTableComponent extends JsfElement implements AfterContentInit, OnChanges {
    @Input()
    value: ApiSearchResponse<any> = new ApiSearchResponse<any>();
    @Output()
    onLoad = new EventEmitter<number>();
    @Input()
    rows: number;
    @Input('var')
    varName: string;
    @Input()
    paginator: boolean;

    @ContentChildren(AceColumnComponent)
    columns: QueryList<AceColumnComponent>;

    @ViewChildren(PaginatorComponent)
    paginators: QueryList<PaginatorComponent>;

    private currentPage: number;
    private headers: Array<FFacetComponent> = [];

    constructor(hFormService: HFormService, elementRef: ElementRef) {
        super(hFormService, elementRef);
    }

    ngAfterContentInit() {
        // call this stuff here as the columns use VieChildren
        for (const column of this.columns.toArray()) {
            if (column.header) {
                this.headers.push(column.header);
            }
        }
    }

    ngOnChanges(): void {
        this.currentPage = Math.floor(this.value.offset / this.rows) + 1;
        // force update of paginators in case we did not change the current page
        if (this.paginators) {
            for (const paginator of this.paginators.toArray()) {
                paginator.ngOnChanges();
            }
        }
    }

    setPage(i: number): void {
        this.currentPage = i;
        this.onLoad.emit(i);
    }

}