import {Component, ElementRef, Input} from '@angular/core';
import {Converter} from '../../superclass/converter';
import {JsfCore} from '../../superclass/jsf-core';

@Component({
    selector: 'f-convert-number',
    templateUrl: './f-convert-number.component.html',
    styleUrls: ['./f-convert-number.component.css'],
})
export class FConvertNumberComponent extends JsfCore implements Converter {
    @Input()
    pattern: string;
    @Input()
    groupingUsed: boolean;
    @Input()
    locale = 'de-DE';

    constructor(elementRef: ElementRef) {
        super(elementRef);
    }

    transformToObject(value: string): any {
        return null;
    }

    transform(value: any): string | null {
        // TODO proper parsing of the decimal java format
        const pattern = this.pattern.split(',');
        return value.toLocaleString(this.locale, {
            minimumFractionDigits: pattern[1].length,
            maximumFractionDigits: pattern[1].length,
            minimumIntegerDigits: pattern[0].length,
            useGrouping: this.groupingUsed,
        });
    }
}