/*
 * Copyright 2000-2011 JetBrains s.r.o.
 *
 * 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 jetbrains.buildServer.buildTriggers.vcs.mercurial.command;

import org.jetbrains.annotations.NotNull;

/**
 * @author Pavel.Sher
 */
public class ChangeSetRevision {
  private final int myRevNumber;
  @NotNull
  private final String myId;

  public ChangeSetRevision(final int revNumber, @NotNull final String id) {
    myRevNumber = revNumber;
    myId = id;
  }

  /**
   * Constructor for version in the form revnum:changeset_id or just changeset_id (in this case rev number is set to -1)
   * @param fullVersion full changeset version as reported by hg log command
   */
  public ChangeSetRevision(@NotNull final String fullVersion) {
    try {
      int colon = fullVersion.indexOf(":");
      if (colon != -1) {
        myRevNumber = Integer.parseInt(fullVersion.substring(0, colon));
        myId = fullVersion.substring(colon+1);
      } else {
        myRevNumber = -1;
        myId = fullVersion;
      }
    } catch (Throwable e) {
      throw new IllegalArgumentException(e);
    }
  }

  /**
   * Returns changeset revision id
   * @return changeset revision id
   */
  @NotNull
  public String getId() {
    return myId;
  }

  /**
   * Returns changeset revision number
   * @return changeset revision number
   */
  public int getRevNumber() {
    return myRevNumber;
  }

  /**
   * Returns full changeset version as reported by hg log command: revnum:revid
   * @return full changeset version as reported by hg log
   */
  @NotNull
  public String getFullVersion() {
    return myRevNumber + ":" + myId;
  }

  @Override
  public boolean equals(final Object o) {
    if (this == o) return true;
    if (o == null || getClass() != o.getClass()) return false;

    final ChangeSetRevision that = (ChangeSetRevision) o;

    return myRevNumber == that.myRevNumber && myId.equals(that.myId);
  }

  @Override
  public int hashCode() {
    int result = myRevNumber;
    result = 31 * result + myId.hashCode();
    return result;
  }

  @Override
  public String toString() {
    return "change:" + myId;
  }
}