import { Directive, ElementRef, forwardRef } from '@angular/core';
import { NG_VALUE_ACCESSOR } from '@angular/forms';

import { ValueAccessor } from './value-accessor';

@Directive({
  /* tslint:disable-next-line:directive-selector */
  selector: '<VALUE_ACCESSOR_SELECTORS>',
  host: {
    '(<VALUE_ACCESSOR_EVENT>)': 'handleChangeEvent($event.target?.["<VALUE_ACCESSOR_TARGETATTR>"])'
  },
  providers: [
    {
      provide: NG_VALUE_ACCESSOR,
      useExisting: forwardRef(() => NumericValueAccessor),
      multi: true
    }
  ]<VALUE_ACCESSOR_STANDALONE>
})
export class NumericValueAccessor extends ValueAccessor {
  constructor(el: ElementRef) {
    super(el);
  }
  override registerOnChange(fn: (_: number | null) => void) {
    super.registerOnChange(value => {
      fn(value === '' ? null : parseFloat(value));
    });
  }
}