import distance from "jaro-winkler";
import levenshtein from "fast-levenshtein";

export function jaroWinklerComparison(
  str_l: string | null,
  str_r: string | null
): number {
  if (str_l === null || str_r === null) {
    return -1;
  }

  if (str_l === str_r) {
    return 2;
  }

  const jaroWinklerDistance = distance(str_l, str_r);

  return jaroWinklerDistance <= 0.9 ? 0 : 1;
}

export function exactMatchComparison(val_l: unknown, val_r: unknown): number {
  if (val_l === null || val_r === null) {
    return -1;
  }

  return val_l === val_r ? 1 : 0;
}

export function levenshteinComparison(
  str_l: string | null,
  str_r: string | null
): number {
  if (str_l === null || str_r === null) {
    return -1;
  }

  if (str_l === str_r) {
    return 2;
  }

  const distance = levenshtein.get(str_l, str_r);

  return distance <= 1 ? 1 : 0;
}