package fr.xephi.authme.util;

import net.ricecode.similarity.LevenshteinDistanceStrategy;
import net.ricecode.similarity.StringSimilarityService;
import net.ricecode.similarity.StringSimilarityServiceImpl;

public class StringUtils {

    /**
     * Get the difference of two strings.
     *
     * @param first First string.
     * @param second Second string.
     *
     * @return The difference value.
     */
    public static double getDifference(String first, String second) {
        // Make sure the strings are valid.
        if(first == null || second == null)
            return 1.0;

        // Create a string similarity service instance, to allow comparison
        StringSimilarityService service = new StringSimilarityServiceImpl(new LevenshteinDistanceStrategy());

        // Determine the difference value, return the result
        return Math.abs(service.score(first, second) - 1.0);
    }
}