/*--------------------------------------------------------------------------------------------------------------
 *  Copyright (c) insite-gmbh. All rights reserved.
 *  Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------------------------*/
import { Component, OnInit, OnDestroy, Input, Output, EventEmitter } from '@angular/core';
import { ActivatedRoute } from '@angular/router';
import { InaxTranslateService } from '../../../../@inax/translate';
import { Subscription } from 'rxjs/Rx';
import { CommonUiResourceManager } from './../resources/resource.service';


@Component({
    selector: 'paging',
    templateUrl: './@inax/commonUi/src/paging/paging.component.html',
    styleUrls: ['./@inax/commonUi/src/paging/paging.component.css']
})
export class PagingComponent implements OnInit, OnDestroy {
    private _currentPage: number = 0;

    @Input() firstPage: number = 0;
    @Input() lastPage: number = 0;
    @Output() pageChanged = new EventEmitter<number>();


    public get pageNumber(): number {
        return this._currentPage;
    }
    
    public set pageNumber(page:number) {
        let old = this._currentPage;
        this._currentPage = page;
        this.onGoToPage(page);
    }

    constructor( 
        //private _resourceManager: CommonUiResourceManager  //this service is necessary because it will register the translations
               ) {  }

    ngOnInit() {
        this._currentPage = Number(this.firstPage);
    }

    ngOnDestroy() {
        
    }


    public onNextPage() {
        let page:number = this._currentPage + 1;
        if (page <= this.lastPage) {
            this._currentPage++;
            this.pageChanged.emit(this._currentPage);
        }
    }

    public onPrevPage() {
        let page:number = this._currentPage - 1;
        if (page >= this.firstPage) {
            this._currentPage--;
            this.pageChanged.emit(this._currentPage);
        }
    }

    //TODO: reset to prev page if number is not in range
    public onGoToPage(page: number):boolean {
        if (page >= this.firstPage && page <= this.lastPage) {
            this._currentPage = page;
            this.pageChanged.emit(this._currentPage);
            return true;
        }
        return false;
    }


}