import { Component, ViewChild, ElementRef } from '@angular/core'; 

import { jqxDataTableComponent } from 'jqwidgets-scripts/jqwidgets-ts/angular_jqxdatatable'; 
import { jqxInputComponent } from 'jqwidgets-scripts/jqwidgets-ts/angular_jqxinput';

import { generatedata } from '../assets/generatedata';

 

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html'

}) 

export class AppComponent {
    @ViewChild('myDataTable') myDataTable: jqxDataTableComponent;
    @ViewChild('myInput') myInput: jqxInputComponent;
    @ViewChild('selectedRows') selectedRows: ElementRef;

    source: any =
    {
        localData: generatedata(15, false),
        datatype: "array",
        dataFields:
        [
            { name: 'firstname', type: 'string' },
            { name: 'lastname', type: 'string' },
            { name: 'productname', type: 'string' },
            { name: 'quantity', type: 'number' },
            { name: 'price', type: 'number' }
        ]
    };

	getWidth() : any {
		if (document.body.offsetWidth < 850) {
			return '90%';
		}
		
		return 850;
	}

    dataAdapter: any = new jqx.dataAdapter(this.source);

    columns: any[] =
    [
        { text: 'First Name', dataField: 'firstname', width: 200 },
        { text: 'Last Name', dataField: 'lastname', width: 200 },
        { text: 'Product', dataField: 'productname', width: 180 },
        { text: 'Unit Price', dataField: 'price', width: 90, align: 'right', cellsAlign: 'right', cellsFormat: 'c2' },
        { text: 'Quantity', dataField: 'quantity', align: 'right', cellsAlign: 'right' }
    ];

    selectionInfo() {
        // gets selected row indexes. The method returns an Array of indexes.
        let selection = this.myDataTable.getSelection();
        let selectedRows = '<br/>Selected Row Indexes:<br/>';
        if (selection && selection.length > 0) {
            let rows = this.myDataTable.getRows();
            for (let i = 0; i < selection.length; i++) {
                let rowData = selection[i];
                selectedRows += rows.indexOf(rowData);
                if (i < selection.length - 1) {
                    selectedRows += ', ';
                }
                if (i > 1 && i % 8 === 0) {
                    selectedRows += '<br/>';
                }
            }
        }
        this.selectedRows.nativeElement.innerHTML = selectedRows;
    }

    dropDownOnChange(event: any): void {
        switch (event.args.index) {
            case 0:
                // disable multiple rows selection with Shift or Ctrl.
                this.myDataTable.selectionMode('singleRow');
                break;
            case 1:
                // enable multiple rows selection with Shift or Ctrl.
                this.myDataTable.selectionMode('multipleRows');
                break;
        }
    };

    rowSelectBtnOnClick(): void {
        let index = parseInt(this.myInput.val());
        this.myDataTable.selectRow(index);
    };

    clearSelectionBtnOnClick(): void {
        this.myDataTable.clearSelection();
    };

    tableOnRowSelect(event: any): void {
        // event arguments
        let args = event.args;
        // row index
        let index = args.index;
        // row data
        let rowData = args.row;
        // row key
        let rowKey = args.key;
        this.selectionInfo();
    };

    tableOnRowUnselect(event: any): void {
        // event arguments
        let args = event.args;
        // row index
        let index = args.index;
        // row data
        let rowData = args.row;
        // row key
        let rowKey = args.key;
        this.selectionInfo();
    };

}