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package com.partner.mapsbooking.authentication;

import java.io.IOException;
import java.util.Base64;
import java.util.StringTokenizer;

/** Check the credentials by validates the data included in authorization headers. */
public class AuthenticationService {
  // TODO(partner): set your user name and password
  private static String USERNAME = "admin";
  private static String PASSWORD = "password";

  public boolean authenticate(String credential) {
    if (null == credential) {
      return false;
    }
    // header value format will be "Basic encoded string" for Basic
    // authentication. Example "Basic YWRtaW46YWRtaW4="
    final String encodedUserPassword = credential.replaceFirst("Basic" + " ", "");
    String usernameAndPassword = null;
    try {
      byte[] decodedBytes = Base64.getDecoder().decode(encodedUserPassword);
      usernameAndPassword = new String(decodedBytes, "UTF-8");
    } catch (IOException e) {
      e.printStackTrace();
    }
    final StringTokenizer tokenizer = new StringTokenizer(usernameAndPassword, ":");
    final String username = tokenizer.nextToken();
    final String password = tokenizer.nextToken();

    boolean authenticationStatus = USERNAME.equals(username) && PASSWORD.equals(password);
    return authenticationStatus;
  }
}