package org.apache.maven.scm.provider.perforce;
   
   /*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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.
   */
  
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.net.InetAddress;
  import java.net.UnknownHostException;
  import java.util.Arrays;
  import java.util.HashSet;
  
  import org.apache.maven.scm.CommandParameters;
  import org.apache.maven.scm.ScmException;
  import org.apache.maven.scm.ScmFileSet;
  import org.apache.maven.scm.command.add.AddScmResult;
  import org.apache.maven.scm.command.blame.BlameScmResult;
  import org.apache.maven.scm.command.changelog.ChangeLogScmResult;
  import org.apache.maven.scm.command.checkin.CheckInScmResult;
  import org.apache.maven.scm.command.checkout.CheckOutScmResult;
  import org.apache.maven.scm.command.diff.DiffScmResult;
  import org.apache.maven.scm.command.edit.EditScmResult;
  import org.apache.maven.scm.command.login.LoginScmResult;
  import org.apache.maven.scm.command.remove.RemoveScmResult;
  import org.apache.maven.scm.command.status.StatusScmResult;
  import org.apache.maven.scm.command.tag.TagScmResult;
  import org.apache.maven.scm.command.unedit.UnEditScmResult;
  import org.apache.maven.scm.command.update.UpdateScmResult;
  import org.apache.maven.scm.log.ScmLogger;
  import org.apache.maven.scm.provider.AbstractScmProvider;
  import org.apache.maven.scm.provider.ScmProviderRepository;
  import org.apache.maven.scm.provider.perforce.command.PerforceInfoCommand;
  import org.apache.maven.scm.provider.perforce.command.PerforceWhereCommand;
  import org.apache.maven.scm.provider.perforce.command.add.PerforceAddCommand;
  import org.apache.maven.scm.provider.perforce.command.blame.PerforceBlameCommand;
  import org.apache.maven.scm.provider.perforce.command.changelog.PerforceChangeLogCommand;
  import org.apache.maven.scm.provider.perforce.command.checkin.PerforceCheckInCommand;
  import org.apache.maven.scm.provider.perforce.command.checkout.PerforceCheckOutCommand;
  import org.apache.maven.scm.provider.perforce.command.diff.PerforceDiffCommand;
  import org.apache.maven.scm.provider.perforce.command.edit.PerforceEditCommand;
  import org.apache.maven.scm.provider.perforce.command.login.PerforceLoginCommand;
  import org.apache.maven.scm.provider.perforce.command.remove.PerforceRemoveCommand;
  import org.apache.maven.scm.provider.perforce.command.status.PerforceStatusCommand;
  import org.apache.maven.scm.provider.perforce.command.tag.PerforceTagCommand;
  import org.apache.maven.scm.provider.perforce.command.unedit.PerforceUnEditCommand;
  import org.apache.maven.scm.provider.perforce.command.update.PerforceUpdateCommand;
  import org.apache.maven.scm.provider.perforce.repository.PerforceScmProviderRepository;
  import org.apache.maven.scm.repository.ScmRepositoryException;
  import org.codehaus.plexus.util.StringUtils;
  import org.codehaus.plexus.util.cli.Commandline;
  
  /**
   * @author <a href="mailto:trygvis@inamo.no">Trygve Laugst&oslash;l </a>
   * @author mperham
   *
   * @plexus.component role="org.apache.maven.scm.provider.ScmProvider" role-hint="perforce"
   */
  public class PerforceScmProvider
      extends AbstractScmProvider
  {
      private static final String [] PROTOCOLS = { "tcp", "tcp4", "tcp6", "tcp46", "tcp64", "ssl", "ssl4", "ssl6", "ssl46", "ssl64" };
      // ----------------------------------------------------------------------
      // ScmProvider Implementation
      // ----------------------------------------------------------------------
  
      public boolean requiresEditMode()
      {
          return true;
      }
  
      public ScmProviderRepository makeProviderScmRepository( String scmSpecificUrl, char delimiter )
          throws ScmRepositoryException
      {
          String protocol = null;
          String path;
          int port = 0;
          String host = null;
  
          //minimal logic to support perforce protocols in scm url, and keep the next part unchange
          int i0 = scmSpecificUrl.indexOf( delimiter );
         if ( i0 > 0 )
         {
             protocol = scmSpecificUrl.substring( 0, i0 );
             HashSet<String> protocols = new HashSet<String>( Arrays.asList( PROTOCOLS ));
             if ( protocols.contains( protocol ) )
             {
                 scmSpecificUrl = scmSpecificUrl.substring( i0 + 1 );
             }
             else
             {
                 protocol = null;
             }
         }
 
         int i1 = scmSpecificUrl.indexOf( delimiter );
         int i2 = scmSpecificUrl.indexOf( delimiter, i1 + 1 );
 
         if ( i1 > 0 )
         {
             int lastDelimiter = scmSpecificUrl.lastIndexOf( delimiter );
             path = scmSpecificUrl.substring( lastDelimiter + 1 );
             host = scmSpecificUrl.substring( 0, i1 );
 
             // If there is tree parts in the scm url, the second is the port
             if ( i2 >= 0 )
             {
                 try
                 {
                     String tmp = scmSpecificUrl.substring( i1 + 1, lastDelimiter );
                     port = Integer.parseInt( tmp );
                 }
                 catch ( NumberFormatException ex )
                 {
                     throw new ScmRepositoryException( "The port has to be a number." );
                 }
             }
         }
         else
         {
             path = scmSpecificUrl;
         }
 
         String user = null;
         String password = null;
         if ( host != null && host.indexOf( '@' ) > 1 )
         {
             user = host.substring( 0, host.indexOf( '@' ) );
             host = host.substring( host.indexOf( '@' ) + 1 );
         }
 
         if ( path.indexOf( '@' ) > 1 )
         {
             if ( host != null )
             {
                 if ( getLogger().isWarnEnabled() )
                 {
                     getLogger().warn(
                                       "Username as part of path is deprecated, the new format is "
                                           + "scm:perforce:[username@]host:port:path_to_repository" );
                 }
             }
 
             user = path.substring( 0, path.indexOf( '@' ) );
             path = path.substring( path.indexOf( '@' ) + 1 );
         }
 
         return new PerforceScmProviderRepository( protocol, host, port, path, user, password );
     }
 
     public String getScmType()
     {
         return "perforce";
     }
 
     /** {@inheritDoc} */
     protected ChangeLogScmResult changelog( ScmProviderRepository repository, ScmFileSet fileSet,
                                             CommandParameters parameters )
         throws ScmException
     {
         PerforceChangeLogCommand command = new PerforceChangeLogCommand();
         command.setLogger( getLogger() );
         return (ChangeLogScmResult) command.execute( repository, fileSet, parameters );
     }
 
     public AddScmResult add( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceAddCommand command = new PerforceAddCommand();
         command.setLogger( getLogger() );
         return (AddScmResult) command.execute( repository, fileSet, params );
     }
 
     protected RemoveScmResult remove( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceRemoveCommand command = new PerforceRemoveCommand();
         command.setLogger( getLogger() );
         return (RemoveScmResult) command.execute( repository, fileSet, params );
     }
 
     protected CheckInScmResult checkin( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceCheckInCommand command = new PerforceCheckInCommand();
         command.setLogger( getLogger() );
         return (CheckInScmResult) command.execute( repository, fileSet, params );
     }
 
     protected CheckOutScmResult checkout( ScmProviderRepository repository, ScmFileSet fileSet,
                                           CommandParameters params )
         throws ScmException
     {
         PerforceCheckOutCommand command = new PerforceCheckOutCommand();
         command.setLogger( getLogger() );
         return (CheckOutScmResult) command.execute( repository, fileSet, params );
     }
 
     protected DiffScmResult diff( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceDiffCommand command = new PerforceDiffCommand();
         command.setLogger( getLogger() );
         return (DiffScmResult) command.execute( repository, fileSet, params );
     }
 
     protected EditScmResult edit( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceEditCommand command = new PerforceEditCommand();
         command.setLogger( getLogger() );
         return (EditScmResult) command.execute( repository, fileSet, params );
     }
 
     protected LoginScmResult login( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceLoginCommand command = new PerforceLoginCommand();
         command.setLogger( getLogger() );
         return (LoginScmResult) command.execute( repository, fileSet, params );
     }
 
     protected StatusScmResult status( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceStatusCommand command = new PerforceStatusCommand();
         command.setLogger( getLogger() );
         return (StatusScmResult) command.execute( repository, fileSet, params );
     }
 
     protected TagScmResult tag( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceTagCommand command = new PerforceTagCommand();
         command.setLogger( getLogger() );
         return (TagScmResult) command.execute( repository, fileSet, params );
     }
 
     protected UnEditScmResult unedit( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceUnEditCommand command = new PerforceUnEditCommand();
         command.setLogger( getLogger() );
         return (UnEditScmResult) command.execute( repository, fileSet, params );
     }
 
     protected UpdateScmResult update( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceUpdateCommand command = new PerforceUpdateCommand();
         command.setLogger( getLogger() );
         return (UpdateScmResult) command.execute( repository, fileSet, params );
     }
 
     protected BlameScmResult blame( ScmProviderRepository repository, ScmFileSet fileSet, CommandParameters params )
         throws ScmException
     {
         PerforceBlameCommand command = new PerforceBlameCommand();
         command.setLogger( getLogger() );
         return (BlameScmResult) command.execute( repository, fileSet, params );
     }
 
     public static Commandline createP4Command( PerforceScmProviderRepository repo, File workingDir )
     {
         Commandline command = new Commandline();
         command.setExecutable( "p4" );
         if ( workingDir != null )
         {
             // SCM-209
             command.createArg().setValue( "-d" );
             command.createArg().setValue( workingDir.getAbsolutePath() );
         }
 
 
         if ( repo.getHost() != null )
         {
             command.createArg().setValue( "-p" );
             String value = "";
             if ( ! StringUtils.isBlank( repo.getProtocol() ) )
             {
                 value += repo.getProtocol() + ":";
             }
             value += repo.getHost();
             if ( repo.getPort() != 0 )
             {
                 value += ":" + Integer.toString( repo.getPort() );
             }
             command.createArg().setValue( value );
         }
 
         if ( StringUtils.isNotEmpty( repo.getUser() ) )
         {
             command.createArg().setValue( "-u" );
             command.createArg().setValue( repo.getUser() );
         }
 
         if ( StringUtils.isNotEmpty( repo.getPassword() ) )
         {
             command.createArg().setValue( "-P" );
             command.createArg().setValue( repo.getPassword() );
         }
         return command;
     }
 
     public static String clean( String string )
     {
         if ( string.indexOf( " -P " ) == -1 )
         {
             return string;
         }
         int idx = string.indexOf( " -P " ) + 4;
         int end = string.indexOf( ' ', idx );
         return string.substring( 0, idx ) + StringUtils.repeat( "*", end - idx ) + string.substring( end );
     }
 
     /**
      * Given a path like "//depot/foo/bar", returns the
      * proper path to include everything beneath it.
      * <p/>
      * //depot/foo/bar -> //depot/foo/bar/...
      * //depot/foo/bar/ -> //depot/foo/bar/...
      * //depot/foo/bar/... -> //depot/foo/bar/...
      *
      * @param repoPath
      * @return
      */
     public static String getCanonicalRepoPath( String repoPath )
     {
         if ( repoPath.endsWith( "/..." ) )
         {
             return repoPath;
         }
         else if ( repoPath.endsWith( "/" ) )
         {
             return repoPath + "...";
         }
         else
         {
             return repoPath + "/...";
         }
     }
 
     private static final String NEWLINE = "\r\n";
 
     /*
      * Clientspec name can be overridden with the system property below.  I don't
      * know of any way for this code to get access to maven's settings.xml so this
      * is the best I can do.
      *
      * Sample clientspec:
 
      Client: mperham-mikeperham-dt-maven
      Root: d:\temp\target
      Owner: mperham
      View:
      //depot/sandbox/mperham/tsa/tsa-domain/... //mperham-mikeperham-dt-maven/...
      Description:
      Created by maven-scm-provider-perforce
 
      */
     public static String createClientspec( ScmLogger logger, PerforceScmProviderRepository repo, File workDir,
                                            String repoPath )
     {
         String clientspecName = getClientspecName( logger, repo, workDir );
         String userName = getUsername( logger, repo );
 
         String rootDir;
         try
         {
             // SCM-184
             rootDir = workDir.getCanonicalPath();
         }
         catch ( IOException ex )
         {
             //getLogger().error("Error getting canonical path for working directory: " + workDir, ex);
             rootDir = workDir.getAbsolutePath();
         }
 
         StringBuilder buf = new StringBuilder();
         buf.append( "Client: " ).append( clientspecName ).append( NEWLINE );
         buf.append( "Root: " ).append( rootDir ).append( NEWLINE );
         buf.append( "Owner: " ).append( userName ).append( NEWLINE );
         buf.append( "View:" ).append( NEWLINE );
         buf.append( "\t" ).append( PerforceScmProvider.getCanonicalRepoPath( repoPath ) );
         buf.append( " //" ).append( clientspecName ).append( "/..." ).append( NEWLINE );
         buf.append( "Description:" ).append( NEWLINE );
         buf.append( "\t" ).append( "Created by maven-scm-provider-perforce" ).append( NEWLINE );
         return buf.toString();
     }
 
     public static final String DEFAULT_CLIENTSPEC_PROPERTY = "maven.scm.perforce.clientspec.name";
 
     public static String getClientspecName( ScmLogger logger, PerforceScmProviderRepository repo, File workDir )
     {
         String def = generateDefaultClientspecName( logger, repo, workDir );
         // until someone put clearProperty in DefaultContinuumScm.getScmRepository( Project , boolean  )
         String l = System.getProperty( DEFAULT_CLIENTSPEC_PROPERTY, def );
         if ( l == null || "".equals( l.trim() ) )
         {
             return def;
         }
         return l;
     }
 
     private static String generateDefaultClientspecName( ScmLogger logger, PerforceScmProviderRepository repo,
                                                          File workDir )
     {
         String username = getUsername( logger, repo );
         String hostname;
         String path;
         try
         {
             hostname = InetAddress.getLocalHost().getHostName();
             // [SCM-370][SCM-351] client specs cannot contain forward slashes, spaces and ~; "-" is okay
             path = workDir.getCanonicalPath().replaceAll( "[/ ~]", "-" );
         }
         catch ( UnknownHostException e )
         {
             // Should never happen
             throw new RuntimeException( e );
         }
         catch ( IOException e )
         {
             throw new RuntimeException( e );
         }
         return username + "-" + hostname + "-MavenSCM-" + path;
     }
 
     private static String getUsername( ScmLogger logger, PerforceScmProviderRepository repo )
     {
         String username = PerforceInfoCommand.getInfo( logger, repo ).getEntry( "User name" );
         if ( username == null )
         {
             // os user != perforce user
             username = repo.getUser();
             if ( username == null )
             {
                 username = System.getProperty( "user.name", "nouser" );
             }
         }
         return username;
     }
 
     /**
      * This is a "safe" method which handles cases where repo.getPath() is
      * not actually a valid Perforce depot location.  This is a frequent error
      * due to branches and directory naming where dir name != artifactId.
      *
      * @param log     the logging object to use
      * @param repo    the Perforce repo
      * @param basedir the base directory we are operating in.  If pom.xml exists in this directory,
      *                this method will verify <pre>repo.getPath()/pom.xml</pre> == <pre>p4 where basedir/pom.xml</pre>
      * @return repo.getPath if it is determined to be accurate.  The p4 where location otherwise.
      */
     public static String getRepoPath( ScmLogger log, PerforceScmProviderRepository repo, File basedir )
     {
         PerforceWhereCommand where = new PerforceWhereCommand( log, repo );
 
         // Handle an edge case where we release:prepare'd a module with an invalid SCM location.
         // In this case, the release.properties will contain the invalid URL for checkout purposes
         // during release:perform.  In this case, the basedir is not the module root so we detect that
         // and remove the trailing target/checkout directory.
         if ( basedir.toString().replace( '\\', '/' ).endsWith( "/target/checkout" ) )
         {
             String dir = basedir.toString();
             basedir = new File( dir.substring( 0, dir.length() - "/target/checkout".length() ) );
             log.debug( "Fixing checkout URL: " + basedir );
         }
         File pom = new File( basedir, "pom.xml" );
         String loc = repo.getPath();
         log.debug( "SCM path in pom: " + loc );
         if ( pom.exists() )
         {
             loc = where.getDepotLocation( pom );
             if ( loc == null )
             {
                 loc = repo.getPath();
                 log.debug( "cannot find depot => using " + loc );
             }
             else if ( loc.endsWith( "/pom.xml" ) )
             {
                 loc = loc.substring( 0, loc.length() - "/pom.xml".length() );
                 log.debug( "Actual POM location: " + loc );
                 if ( !repo.getPath().equals( loc ) )
                 {
                     log.info( "The SCM location in your pom.xml (" + repo.getPath()
                         + ") is not equal to the depot location (" + loc
                         + ").  This happens frequently with branches.  " + "Ignoring the SCM location." );
                 }
             }
         }
         return loc;
     }
 
 
     private static Boolean live = null;
 
     public static boolean isLive()
     {
         if ( live == null )
         {
             if ( !Boolean.getBoolean( "maven.scm.testing" ) )
             {
                 // We are not executing in the tests so we are live.
                 live = Boolean.TRUE;
             }
             else
             {
                 // During unit tests, we need to check the local system
                 // to see if the user has Perforce installed.  If not, we mark
                 // the provider as "not live" (or dead, I suppose!) and skip
                 // anything that requires an active server connection.
                 try
                 {
                     Commandline command = new Commandline();
                     command.setExecutable( "p4" );
                     Process proc = command.execute();
                     BufferedReader br = new BufferedReader( new InputStreamReader( proc.getInputStream() ) );
                     @SuppressWarnings( "unused" )
                     String line;
                     while ( ( line = br.readLine() ) != null )
                     {
                         //System.out.println(line);
                     }
                     int rc = proc.exitValue();
                     live = ( rc == 0 ? Boolean.TRUE : Boolean.FALSE );
                 }
                 catch ( Exception e )
                 {
                     e.printStackTrace();
                     live = Boolean.FALSE;
                 }
             }
         }
 
         return live.booleanValue();
     }
 }