import { PDFClasses } from '../../api/objects';
import { copyStringIntoBuffer, numberToString } from '../../utils/index';

import PDFObject from './PDFObject';

class PDFNumber extends PDFObject {
  static className = () => PDFClasses.PDFNumber;
  myClass(): PDFClasses {
    return PDFClasses.PDFNumber;
  }
  static of = (value: number) => new PDFNumber(value);

  private readonly numberValue: number;
  private readonly stringValue: string;

  private constructor(value: number) {
    super();
    this.numberValue = value;
    this.stringValue = numberToString(value);
  }

  asNumber(): number {
    return this.numberValue;
  }

  /** @deprecated in favor of [[PDFNumber.asNumber]] */
  value(): number {
    return this.numberValue;
  }

  clone(): PDFNumber {
    return PDFNumber.of(this.numberValue);
  }

  toString(): string {
    return this.stringValue;
  }

  sizeInBytes(): number {
    return this.stringValue.length;
  }

  copyBytesInto(buffer: Uint8Array, offset: number): number {
    copyStringIntoBuffer(this.stringValue, buffer, offset);
    return this.stringValue.length;
  }
}

export default PDFNumber;