/*
 * This file is part of Arduino.
 *
 * Copyright 2014 Arduino LLC (http://www.arduino.cc/)
 *
 * Arduino is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
 * the GNU General Public License.  This exception does not however
 * invalidate any other reasons why the executable file might be covered by
 * the GNU General Public License.
 */

package cc.arduino.contributions;

import com.github.zafarkhaja.semver.Version;

import cc.arduino.contributions.libraries.ContributedLibrary;

import java.util.Comparator;
import java.util.Optional;

public class VersionComparator implements Comparator<String> {

  public static int compareTo(String a, String b) {
    Optional<Version> versionA = VersionHelper.valueOf(a);
    Optional<Version> versionB = VersionHelper.valueOf(b);
    if (versionA.isPresent() && versionB.isPresent()) {
      return versionA.get().compareTo(versionB.get());
    }
    if (versionA.isPresent()) {
      return 1;
    }
    if (versionB.isPresent()) {
      return -1;
    }
    return 0;
  }

  @Override
  public int compare(String a, String b) {
    return compareTo(a, b);
  }

  public static boolean greaterThan(String a, String b) {
    return compareTo(a, b) > 0;
  }

  public static boolean greaterThanOrEqual(String a, String b) {
    return compareTo(a, b) >= 0;
  }

  public static String max(String a, String b) {
    return greaterThan(a, b) ? a : b;
  }

  public static ContributedLibrary max(ContributedLibrary a, ContributedLibrary b) {
    return greaterThan(a, b) ? a : b;
  }

  public static boolean greaterThan(ContributedLibrary a, ContributedLibrary b) {
    return greaterThan(a.getParsedVersion(), b.getParsedVersion());
  }

  public static int compareTo(ContributedLibrary a, ContributedLibrary b) {
    return compareTo(a.getParsedVersion(), b.getParsedVersion());
  }
}
