// Copyright (C) 2015 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package com.googlesource.gerrit.plugins.manager;

public class GerritVersionBranch {
  private static final String GERRIT_NEXT_VERSION = "2.13";

  public static String getBranch(String gerritVersion) {
    if (gerritVersion == null || gerritVersion.trim().isEmpty()
        || !Character.isDigit(gerritVersion.trim().charAt(0))
        || gerritVersion.startsWith(GERRIT_NEXT_VERSION)) {
      return "master";
    } else {
      String[] versionNumbers = gerritVersion.split("\\.");

      if (versionNumbers.length > 2) {
        String fixVersionNumber = versionNumbers[2];
        if (fixVersionNumber.contains("-")) {
          String nextVersion =
              String.format("%s.%d", versionNumbers[0],
                  Integer.parseInt(versionNumbers[1]) + 1);
          if (nextVersion.equals(GERRIT_NEXT_VERSION)) {
            return "master";
          }
        }
      }
      return "stable-" + versionNumbers[0] + "." + versionNumbers[1];
    }
  }
}