/**
 * Company Number (מספר חברה, or short ח.פ. Israeli company number).
 *
 * It consists of nine digits and includes a check digit. For companies
 * the first digit is a 5. The first two digits identify the type of
 * company.
 *
 * Source
 *   https://he.wikipedia.org/wiki/תאגיד#מספר_רישום_התאגיד
 *   https://www.oecd.org/tax/automatic-exchange/crs-implementation-and-assistance/tax-identification-numbers/Israel-TIN.pdf
 *   https://wiki.scn.sap.com/wiki/display/CRM/Israel
 *
 * Entity
 */

import * as exceptions from '../exceptions';
import { strings } from '../util';
import { Validator, ValidateReturn } from '../types';
import { luhnChecksumValidate } from '../util/checksum';

function clean(input: string): ReturnType<typeof strings.cleanUnicode> {
  return strings.cleanUnicode(input, ' -');
}

const impl: Validator = {
  name: 'Israeli Company Number',
  localName: 'מספר חברה',
  abbreviation: 'ח.פ.',
  compact(input: string): string {
    const [value, err] = clean(input);

    if (err) {
      throw err;
    }

    return value;
  },

  format(input: string): string {
    const [value] = clean(input);

    return value;
  },

  validate(input: string): ValidateReturn {
    const [value, error] = clean(input);

    if (error) {
      return { isValid: false, error };
    }
    if (value.length !== 9) {
      return { isValid: false, error: new exceptions.InvalidLength() };
    }
    if (!strings.isdigits(value)) {
      return { isValid: false, error: new exceptions.InvalidFormat() };
    }
    if (value[0] !== '5') {
      return { isValid: false, error: new exceptions.InvalidComponent() };
    }

    if (!luhnChecksumValidate(value)) {
      return { isValid: false, error: new exceptions.InvalidChecksum() };
    }

    return {
      isValid: true,
      compact: value,
      isIndividual: false,
      isCompany: true,
    };
  },
};

export const { name, localName, abbreviation, validate, format, compact } =
  impl;