// 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 = "2.16";

  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";
    }
    String[] versionNumbers = gerritVersion.split("\\.");
    String major = versionNumbers[0];
    String minor = versionNumbers[1];

    if (minor.contains("-")) {
      minor = minor.split("-")[0];
    }

    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-" + major + "." + minor;
  }
}