package com.example.utils;

import com.example.types.FingerprintCompareListItem;
import com.example.types.VerificationResult;
import com.machinezoo.sourceafis.FingerprintMatcher;
import com.machinezoo.sourceafis.FingerprintTemplate;

public class Verification {

    private static final double MATCH_THRESHOLD = 40.0;

    public static VerificationResult verifyFingeprint(FingerprintTemplate fingerprintData, FingerprintCompareListItem[] givenDataToMatch, FingerprintCompareListItem[] localData) {
        try {
            FingerprintCompareListItem[] fingerprintList;
            double bestScore = 0;
            VerificationResult matchedPerson = null;
            // If no given Data to Match then try local data to match
            if (givenDataToMatch == null || givenDataToMatch.length <= 0) {
                fingerprintList = localData;
            } else {
                fingerprintList = givenDataToMatch;
            }

            if (fingerprintList.length <= 0) {
                return null;
            }

            for (FingerprintCompareListItem entry : fingerprintList) {
                String personName = entry.getName();
                int fpPosition = entry.getFingerPosition();
                FingerprintTemplate candidate = entry.getFingerprint();

                double score = new FingerprintMatcher(fingerprintData).match(candidate);
                if (score > bestScore) {
                    bestScore = score;
                    matchedPerson.setName(personName);
                    matchedPerson.setFingerPosition(fpPosition);
                    matchedPerson.setFingerprint(candidate);
                    matchedPerson.setScore(bestScore);
                }
            }

            // Return response based on score
            if (bestScore >= MATCH_THRESHOLD) {
                System.out.println("Person Matched: " + matchedPerson.getName() + "Score: " + bestScore);
                return matchedPerson;
            } else {
                return null;
            }

        } catch (Exception e) {
            System.out.println("Exception Error" + e);
            return null;
        }
    }
}